Service/ P arts Manual VERT-I-PAK

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VPK 2012-2018 Service Manual

Service/ Parts Manual

VERT-I-PAK

Standard Chassis Models 9K VEA - 09K25RTN, 09K34RTN, 09K50RTN, 09K25RTP, 09K34RTP, 09K50RTP
VHA - 09K25RTN, 09K34RTN, 09K50RTN, 09R25RTN, 09R34RTN, 09R50RTN

12K VEA - 12K25RTN, 12K34RTN, 12K50RTN,12K25RTP, 12K34RTP, 12K50RTP VHA - 2K25RTN, 12K34RTN, 12K50RTN, 12R25RTN, 12R34RTN, 12R50RTN
18K VEA - 18K25RTN, 18K34RTN, 18K50RTN,18K25RTP, 18K34RTP, 18K50RTP VHA - 18K25RTN, 18K34RTN, 18K50RTN, 18R25RTN, 18R34RTN, 18R50RTN

24K

VEA - 24K10RTP, 24K25RTP, 24K34RTP, 24K50RTP, 24K75RTP VHA - 24K10RTN, 24K25RTN, 24K34RTN, 24K50RTN, 24K75RTN VHA - 24R10RTN, 24R25RTN, 24R34RTN, 24R50RTN, 24R75RTN

1 95992010_00

Table of Contents

INTRODUCTION

Important Safety Information

Personal Injury Or Death Hazards

Operation of Equipment in During Construction

Equipment Identification

Model and Serial Number Location

Model and Serial Number information is found on the Manufacturer's DATA TAG, located on the front or top.

Model Number Reference Guide

SERIAL NUMBER REFERENCE GUIDE

SPECIFICATIONS

Chassis Specifications

Small Chassis Dimensions

Large Chassis Dimensions

Electrical Data

Electrical Requirements

Electrical Ratings Table

Supply Air Flow and Data

OPERATION

Electronic Control Board Features

Electronic Sequence of Operation

Compressor Lock Out Time

Cooling Fan Delay

Heating Fan Delay

Fan Speed Change Delay

Room Air Sampling Feature

Low Voltage Interface Connections

Interface Connector Definitions

Remote Wall Thermostat

Remote Wall Thermostat Location

Desk Control

Auxiliary Fan Control

Unit Heat Control Operation - Heat Pump With Electric Heat

Refrigeration Sequence Of Operation

REMOVE AND INSTALL THE CHASSIS

Remove The Chassis

Servicing / Chassis Quick Changeouts

To Remove the Chassis from the Closet:

R-410A SEALED SYSTEM REPAIR

Refrigerant Charging

Undercharged Refrigerant Systems

Overcharged Refrigerant Systems

Restricted Refrigerant System

Sealed System Method of Charging/ Repairs

EXTERNAL STATIC PRESSURE

Checking External Static Pressure

Explanation of charts

Indoor Airflow Data

Ductwork Preparation

Fresh Air Door

Checking Approximate Airflow

Electric Heat Strips

COMPONENT TESTING

Hermetic Components Check

Reversing Valve Description And Operation

Testing The Reversing Valve Solenoid Coil

Checking The Reversing Valve

Touch Test Chart : To Service Reversing Valves

Compressor Checks

Compressor Replacement -Special Procedure in Case of Compressor Burnout

Fan Motor

Capacitors47

Heating Element and Limit Switch

Heater Elements And Limit Switches' Specifications

Drain Pan Valve

Thermistor Resistence Values (This Table Applies to All Thermistors)

Testing the Diagnostic Service Module

Testing the Electronic Control Board

Electronic Control Board Components Identification And Testing

TROUBLESHOOTING

Error Codes and Alarm Status

Electrical Troubleshooting Chart - Cooling

9K Btu, 12K Btu, & 18K Btu

24K Btu

Electrical Troubleshooting Chart - Heat Pump

Troubleshooting Chart - Cooling

WIRING DIAGRAMS

9-18K VEA 208/230V

9-18K VHA 208/230V

9-18K VHA 265V

24K VEA 208/230V 2.5/3.4/5.0

24K VEA 208/230V 7.5/10.0

24K VHA 208/230V 2.5/3.4/5.0

24K VHA 208/230V 7.5/10

24K VHA 265V 2.5/3.4/5.0

24K VHA 265V 7.5/10.0

PARTS CATALOG

VEA9K, VHA9K, VEA12K, VHA12K, VEA18K

VHA18K, VEA24K, VHA24K Figure 902

AVAILABLE ACCESSORIES

Thermostat - Rt6

Thermostat - Rt6p

Thermostat - WRT1

102

Drain Pan

116

INTRODUCTION
IMPORTANT SAFETY INFORMATION
The information in this manual is intended for use by a qualified technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered. If you install or perform service on equipment, it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others.

Your safety and the safety of others is very important.
We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages.
This is a safety Alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol with the word "WARNING" or "CAUTION". These words mean:

WARNING

Indicates a hazard which, if not avoided, can result in severe personal injury or death and damage to product or other property.

CAUTION NOTICE

Indicates a hazard which, if not avoided, can result in personal injury and damage to product or other property.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what will happen if the instructions are not followed.
Indicates property damage can occur if instructions are not followed.

WARNING
Refrigeration system under high pressure Do not puncture, heat, expose to flame or incinerate. Only certified refrigeration technicians should service this equipment. R410A systems operate at higher pressures than R22 equipment. Appropriate safe service and handling practices must be used. Only use gauge sets designed for use with R410A. Do not use standard R22 gauge sets.
4

INTRODUCTION
PERSONAL INJURY OR DEATH HAZARDS

SAFETY FIRST

WARNING

AVERTISSEMENT ADVERTENCIA

Do not remove, disable or bypass this unit's safety devices. Doing so may cause fire, Doing so may cause fire, injuries, or death.

Ne pas supprime, désactiver ou contourner cette l´unité des dispositifs de sécurité, faire vous risqueriez de provoquer le feu, les blessures ou la mort.

No eliminar, desactivar o pasar por alto los dispositivos de seguridad de la unidad. Si lo hace podría producirse fuego, lesiones o muerte.

ELECTRICAL HAZARDS:

Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenance, or service.

Make sure to follow proper lockout/tag out procedures.

Always work in the company of a qualified assistant if possible.

Capacitors, even when disconnected from the electrical power source, retain an electrical charge potential

capable of causing electric shock or electrocution.

Handle, discharge, and test capacitors according to safe, established, standards, and approved procedures.

Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary to test or

troubleshoot equipment with the power on to the unit.

Do not spray water on the air conditioning unit while the power is on.

Electrical component malfunction caused by water could result in electric shock or other electrically unsafe

conditions when the power is restored and the unit is turned on, even after the exterior is dry.

Use air conditioner on a single dedicated circuit within the specified amperage rating.

Use on a properly grounded outlet only.

Do not cut or modify the power supply cord or remove the ground prong of the plug.

Never operate the unit on an extension cord.

Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, goggles,

clothing, properly insulated tools, and testing equipment etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

INTRODUCTION

PERSONAL INJURY OR DEATH HAZARDS · REFRIGERATION SYSTEM REPAIR HAZARDS:

Use approved standard refrigerant recovering procedures and equipment to relieve high pressure before open-

ing system for repair.

Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor to moder-

ate injury.

Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch's flame or hot surfaces

can cause serious burns.

Make certain to protect personal and surrounding property with fire proof materials and have a fire extinguisher

at hand while using a torch.

Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever possible.

Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks, flush-

ing etc.

· MECHANICAL HAZARDS:

Extreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, han-

dling, or working around unit with moving and/or rotating parts.

Be careful when, handling and working around exposed edges and corners of the sleeve, chassis, and other unit

components especially the sharp fins of the indoor and outdoor coils.

Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

· PROPERTY DAMAGE HAZARDS

· FIRE DAMAGE HAZARDS:

Read the Installation/Operation Manual for the air conditioning unit prior to operating.

Use air conditioner on a single dedicated circuit within the specified amperage rating.

Connect to a properly grounded outlet only.

Do not remove ground prong of plug.

Do not cut or modify the power supply cord.

Do not use extension cords with the unit.

Be extremely careful when using acetylene torch and protect surrounding property.

Failure to follow these instructions can result in fire and minor to serious property damage.

· WATER DAMAGE HAZARDS:

Improper installation, maintenance or servicing of the air conditioner unit can result in water damage to personal

items or property.

Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit.

Do not drill holes in the bottom of the drain pan or the underside of the unit.

Failure to follow these instructions can result in damage to the unit and/or minor to serious property damage.

INTRODUCTION
Operation of Equipment in During Construction

· OPERATION OF EQUIPMENT MUST BE AVOIDED DURING CONSTRUCTION PHASES WHICH WILL PRODUCE AIRBORNE DUST OR CONTAMINTES NEAR OR AROUND AIR INTAKE OPENINGS:

Wood or metal framing;

Drywalling or sheathing,

Spackling or applying joint compound.

Sanding or grinding.

Moulding or trimwork.

NOTICE
Operating the equipment during any phase of active construction noted above can void the equipment's warranty, also leading to poor performance and premature failure

INTRODUCTION
This service manual is designed to be used in conjunction with the installation and operation manuals provided with each air conditioning system. This service manual was written to assist the professional service technician to quickly and accurately diagnose and repair malfunctions. Installation procedures are not given in this manual. They are given in the Installation and Operation Manual which can be aquired on the Friedrich website (www.friedrich.com).
Equipment Identification
Figure 101 (Equipment Identification Example)
Model and Serial Number Location Model and Serial Number information is found on the Manufacturer's DATA TAG, located on the front or top.
Figure 102 (Model and Serial Number Location) 8

INTRODUCTION
Model Number Reference Guide
V E A 09 K 34 RT L - A

SERIES V=VERTICAL SERIES
FUNCTION E - ELECTRIC HEAT H - HEAT PUMP
DESIGN SERIES A = 32"/47" CABINET
NOMINAL CAPACITY A SERIES (Btu/h) 09= 9,000 12 = 12,000 18 = 18,000 24 = 24,000

ENGINEERING REVSION LETTER INDICATES AN ENGINEERING MODIFICATION TO AN EXISTING MODEL
MARKETING SUFFIX LETTER INDICATES MODIFICATION TO AN EXISTING MODEL SERIES
OPTIONS RT = STANDARD REMOTE OPERATION
ELECTRIC HEATER SIZE A SERIES 25 = 2.5 KW 75 = 7.5KW 34 = 3.4 KW 10 = 10KW 50 = 5.0 KW
VOLTAGE K = 208/230V - 1PH-60Hz R = 265V

IMPORTANT: It will be necessary for you to accurately identify the unit you are servicing, so you can be certain of a proper diagnosis and repair.
Figure 103
9

INTRODUCTION
SERIAL NUMBER REFERENCE GUIDE
17 12 M 00001

YEAR OF MANUFACTURE 17 = 2017 18 = 2018 19 = 2019 20 = 2020 21 = 2021 22 = 2022

NUMERIC SEQUENCE FIRST UNIT OF EACH MONTH = 00001

MONTH OF MANUFACTURE 01 = JANUARY 02 = FEBRUARY 03 = MARCH 04 = APRIL 05 = MAY 06 = JUNE 07 = JULY 08 = AUGUST 09 = SEPTEMBER 10 = OCTOBER 11 = NOVEMBER 12 = DECEMBER

MANUFACTURING LOCATION

Refer to the Chart below for Serial Numbers beginning with an Alpha Sequence

VPAK Serial Number Identification Guide

SERIAL NUMBER

00001

YEAR MANUFACTURED

LJ = 2009 AK = 2010 AA = 2011 AB = 2012 AC = 2013 AD = 2014

AE = 2015 AF = 2016 AG = 2017 AH = 2018 AJ = 2019

PRODUCTION RUN NUMBER
PRODUCT LINE N = VPAK

MONTH MANUFACTURED

A = Jan

D = Apr

G = Jul

B = Feb E = May H = Aug

C = Mar

F = Jun

J = Sep

K = Oct L = Nov M = Dec
Figure 104

Chassis Specifications

SPECIFICATIONS

MODEL

VEA09, VEA12, VEA18, VHA09, VEA 24, VHA18, VHA 24 VHA12

Voltage

230/208 or 265

Refrigerant

R-410A

Chassis Width

23 1/8"

Chassis Depth

23 1/8"

Chasis Height**

32 1/4"

Shipping W x D x H

26 x 28 1/2" x 35"

Supply Factory Collar ***

10"

Drain Connection

3/4" FPT

NOTE: ** Height includes 2" duct collar and isolators under unit *** Factory collar accepts 10" flex duct

230/208 or 265 R-410A 23 1/8" 23 1/8" 47 1/4" 26" x 25" x 52" 10" 3/4" FPT

Small Chassis Dimensions
Top

ELECTRICAL ENTRY
11

Front
23 1/8"
10"
DUC T DIAMETER

2 15/16"

29 1/2"

RETURN AIR

1 1/2"

Side
23 1/8"
SUPPLY AIR

CONDEN SE R INLET AIR

CONDENSER
EXHAUST AIR

29 1/2"

Figure 105

Rear
10 1/8" 31"
19 1/2"

SPECIFICATIONS
Large Chassis Dimensions

24 3/8

22 15/16 TOP
2 1/2
CONDENSER INLET AIR
42 5/8 47 15/16 CONDENSER EXHAUST AIR

10
DUCT DIAMETER

ELECTRICAL ENTRY BOTH SIDES

RETURN AIR
39 3/4

FRONT

1 1/2

SIDE

SUPPLY AIR

5 1/16
2 3/16 11 11/16

31 REAR

Figure 106

Electrical Data

SPECIFICATIONS

MODEL
HEATER WATTS
VOLTAGE
ELEC. HEATING CURRENT (AMPS)
MINIMUM CIRCUIT AMPACITY
BRANCH CIRCUIT FUSE (AMPS)
LRA - COMPRESSOR (AMPS)
COOLING CURRENT (AMPS)
BASIC HEATER SIZE
POWER CONNECTION
RECOMMENDED BRANCH CIRCUIT WIRE SIZES* AWGAMERICAN WIRE GAUGE

VEA09K 2500/ 2050 230/208 12.0/11.1

3400/ 2780
16.0/14.6

19.9

21.0

4.2/4.4

2.5 KW 3.4 KW HARD WIRED

5000/ 4090 22.9/20.9 28.6 30 21.0 4.2/4.4 5.0 KW
10

VEA12K 2500/ 2050 230/208 12.0/11.1

3400/ 2780
16.0/14.6

19.9

29.5

5.2/5.6

2.5 KW

3.4 KW

HARD WIRED

5000/ 4090 22.9/20.9 28.6 30 29.5 5.2/5.6 5.0 KW
10

VEA18K 2500/ 2050 230/208 12.0/11.1

3400/ 2780
16.0/14.6

19.9

42.0

8.8/9.5 8.8/9.5

2.5 KW 3.4 KW HARD WIRED

5000/ 4090 22.9/20.9 28.6 30 42.0 8.8/9.5 5.0 KW
10

VEA24K 2500/ 2050 230/208 10.9/9.9

3400/ 2780
14.8/13.4

17.2

22.1

46.0

10.0/10.4 10.0/10.4

2.5 kW

3.4 kW

HARD WIRED

5000/ 4090 21.7/19.7 30.7 35 46.0 10.0/10.4 5.0 kW
8

7500/ 6135 32.6/29.5 44.3 45 46.0 10.0/10.4 7.5 kW
6

10000/ 8180 43.5/39.3 57.9 60 46.0 10.0/10.4 10.0 kW
4

Figure 201 13

Electrical Data

SPECIFICATIONS

VHA09K 2500/2050 3400/2780 230/208 12.0/11.1 16.0/14.6

19.9

21.0

4.3/4.3

2.5 kW

3.4 kW

HARD WIRED

5000/4090 22.9/20.9 28.6 30 21.0 4.3/4.3 5.0 kW
10

VHA12K 2500/2050 3400/2780 230/208 12.0/11.1 16.0/14.6

19.9

30.0

5.7/5.9

2.5 kW

3.4 kW

HARD WIRED

5000/4090 22.9/20.9 28.6 30 30.0 5.7/5.9 5.0 kW
10

MODEL HEATER WATTS
VOLTAGE
ELEC. HEATING CURRENT (AMPS) MINIMUM CIRCUIT AMPACITY BRANCH CIRCUIT FUSE (AMPS) LRA - COMPRESSOR (AMPS) COOLING CURRENT (AMPS) BASIC HEATER SIZE
POWER CONNECTION

VHA18K 2500/ 2050 230/208 10.9/9.9

3400/ 2780
14.8/13.4

14.3

19.2

42.0

8.6/9.2 8.6/9.2

2.5 kW 3.4 kW HARD WIRED

5000/ 4090
21.7/19.7 27.8 30 42.0 8.6/9.2 5.0 kW

VHA24K 2500/ 2050
10.9/9.9 17.2 25 46.0 10.6/10.9 2.5 kW

3400/ 2780
14.8/13.4 22.1 25 46.0 10.6/10.9 3.4 kW

5000/ 4090
21.7/19.7 30.7 30 46.0 10.6/10.9 5.0 kW

7500/ 6135
32.6/29.5 44.3 45 46.0 10.6/10.9 7.5 kW

10000/ 8180
43.5/39.3 57.8 60 46.0 10.6/10.9 10.0 kW

Figure 202 14

Electrical Data

SPECIFICATIONS

VHA09R 2500 265 10.5

3400 13.9

13.1

17.4

21.0

3.5

2.5 kW 3.4 kW HARD WIRED

5000 19.9 24.9 30 21.0 3.5 5.0 kW
10

VHA12R 2500 265 10.5

34000 13.9

13.1

17.4

30.0

5.1

2.5 kW 3.4 kW HARD WIRED

5000 19.9 24.9 30 30.0 5.1 5.0 kW
10

VHA18K 2500 265 9.4

3400 12.8

12.3

16.6

42.0

7.6

2.5 kW 3.4 kW HARD WIRED

5000 18.9 27.1 30 42.0 7.6 5.0 kW
10

VHA24K

2500

34000

9.4 12.3 15 46.0 9.7 2.5 kW

12.8 16.6 20 46.0 9.7 3.4 kW

5000 18.9 27.1 30 46.0 9.7 5.0 kW
10

5000 28.3 38.9 40 46.0 9.7 7.5 kW
6

5000 37.7 50.7 60 46.0 9.7 10.0 kW
4

Figure 203 15

Electrical Requirements

SPECIFICATIONS

ELECTRICAL REQUIREMENTS

WIRE SIZE

USE ONLY WIRE SIZE RECOMMENDED FOR SINGLE OUTLET BRANCH CIRCUIT.

FUSE/CIRCUIT BREAK- USE ONLY TYPE AND SIZE FUSE OR HACR CIR- CUIT BREAKER INDICATED ON UNIT'S

RATING GUIDE. PROPER OVER CURRENT PROTECTION TO THE UNITS IS THE RESPON-

SIBILITY OF THE OWNER.

GROUNDING

UNIT MUST BE GROUNDED FROM BRANCH CIRCUIT TO UNIT, OR THROUGH SEPARATE GROUND WIRE PROVIDED ON PERMANENTLY CONNECTED UNITS. ENSURE THAT BRANCH CIRCUIT OR GENERAL PUR- POSE OUTLET IS GROUNDED.

WIRE SIZING

USE RECOMMENDED WIRE SIZE GIVEN IN TABLES AND INSTALL A SINGLE BRANCH CIRCUIT. ALL WIRING MUST COMPLY WITH LOCAL AND NATIONAL CODES. NOTE: USE COPPER CONDUCTORS ONLY.

Electrical Ratings Table

Recommended Branch Circuit Sizes*

Nameplate Maximum Circuit Breaker Size

AWG Wiring Size**

15A

20A

30A

45A

60A

NOTE: Use copper conductors ONLY. Wire sizes are per NEC. AWG - American Wire Gauge * Single circuit from main box. ** Based on 100' or less of copper, single insulated conductor at 60° C

WARNING
Electrical Shock Hazard.
Turn OFF electric power before service or installation. Unit must be properly grounded. Unit must have correct fuse or circuit breaker protection. Unit's supply circuit must have the correct wire conductor size. All electrical connections and
and conform to the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in property damage, personal injury and/or death.

NOTE: ALL 230/208 CHASSIS MUST BE HARD WIRED WITH A PROPERLY SIZED BREAKER. SEE UNIT NAMEPLATE FOR SPECIFIC ELECTRICAL REQUIREMENTS. USE HACR TYPE BREAKERS TO AVOID NUISANCE TRIPS. ALL FIELD WIRING MUST BE DONE IN ACCORDANCE WITH NEC AND LOCAL CODES. IT IS THE INSTALLER'S RESPONSIBILITY TO ENSURE THAT THE ELECTRICAL CODES ARE MET.

SPECIFICATIONS
Supply Air Flow and Data
Indoor CFM & External Static Pressure

FAN SPEED ESP (") .10" .15" .20" .25" .30"

MODEL VEA09 LOW CFM 405 375 345 325 305

HIGH
450 420 385 365 340

VHA09/VEA12/ VHA12

LOW

HIGH

420

450

405

425

385

400

355

375

320

350

Figure 204

VEA18 LOW
400 375 350 330 310

HIGH
480 465 450 390 330

Fan Speed ESP (") .10" .15" .20" .25" .30"

Model VEA24 Low CFM 610 585 560 535 510

High
700 670 640 610 580

VHA18 Low

High

420

465

390

420

345

380

300

325

255

280

Figure 205

VHA24 Low
610 585 560 535 510

High
700 670 640 610 580

Indoor air flow may be determined by measuring the external static pressure (ESP) of the duct system using an inclined manometer or magnahelic gauge and consulting the above chart to derive actual air flow. Under no circumstances should the large chassis Vert-I-Pak equipment be operated at an external static pressure in excess of 0.4" W.C. Operation of the Vert-I-Pak under these conditions will result in inadequate air flow, leading to poor performance and/or premature component failure.
Control For LOW speed only operation, connect the fan output terminal from the thermostat to the GL terminal of the electronic control. For HIGH speed only operation, connect the fan output terminal from the thermostat to the GH terminal of the electronic control. For thermostats with two-speed capability, connect the LOW speed output to the GL terminal and the HIGH speed output to the GH terminal.

SPECIFICATIONS
Supply Air Flow and Data
Building Exterior Unit Opening Requirements
be installed no closer than 12" apart when two units are side by side. If three or more units are to operate next to one with adjacent, outset units, a minimum distance of 64" must be kept between units (Figure C). Also, a vertical clearance of ground.

6"
60" 60" 60"
6"
Figure A

60" 60"
60" 60"
6"
Figure B

32 " 160 "
64"
Figure C

60" 60"
60" 60"
12"
Figure D

Grill Clearance Requirements
Where obstructions are present use the following guidelines for proper spacing from the VPAK exterior louvered grill. Friedrich recommends that ALL obstructions are a minimum of 72" from the exhaust.
For minor obstruction(s) such as lamp poles or small shrubbery, a clearance of 24" from the outdoor louver must be maintained.
For major obstructions such as a solid fence, wall, or other heat rejecting devices like a condensing unit, a minimum distance of 72" must be kept.

VPAK
OUTDOOR CONDENSING UNIT

BUILDING
24"

VPAK

POLE

SHRUB

MAJOR OBSTRUCTIONS

FENCE

The the example pictured above is for reference only and does not represent all possible installations. Please contact Friedrich Air Conditioning for information regarding e ects of other installation arrangements.

Figure 206 18

OPERATION
ELECTRONIC CONTROL BOARD FEATURES
The Friedrich Vert-I-Pak has state of the art features to improve guest comfort and conserve energy. Below is a list of standard features on every Friedrich VPAK and their benefitt to the owner.

Quite Start/ Stop Fan Delay

The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing or stopping immediately. Upon call for cooling or heating the unit fan will run for ! ve seconds prior to en-ergizing the compressor. Also, the fan off delay allows for "free cooling" by utilizing the already cool indoor coil to its maximum capacity by running for 30 seconds after the compressor.

Remote Thermostat Opera- VPAK units are controlled by a wired remote wall thermostat. tion

Internal Diagnostic Program

The new Friedrich digital VPAK features a self diagnostic program that can alert maintenance to compo-nent failures or operating problems. The internal diagnostic program saves properties valuable time when diagnosing running problems.

Service Error Code Storage

The self diagnosis program will also store error codes in memory if certain conditions occur and correct themselves such as extreme high or low operating conditions or activation of the room freeze protection feature. Storing error codes can help properties determine if the unit faced obscure conditions or if an error occurred and corrected itself.

Random Compressor Restart Multiple compressors starting at once can often cause electrical overloads and premature unit failure. The random restart delay eliminates multiple units from starting at once following a power outage or initial power up. The compressor delay will range from 180 to 240 seconds.

Heat Pump Units Digital Defrost Thermostat

The new Friedrich VPAK uses a digital thermostat to accurately monitor the outdoor coil conditions to allow the heat pump to run whenever conditions are correct. Running the VPAK in heat pump mode save energy and reduces operating costs. The digital thermostat allows maximization of heat pump run time.

Instant Heat Heat Pump Mode

Heat pump models will automatically run the electric heater during compressor lock-out to quickly provide heat when initially energized, then return to heat pump mode. This ensures that the room is heated quickly without the usual delay associated with heat pump units.

Room Air Sampling Feature

The room air sampling feature maintains a balanced temperature throughout the room by circulating the air for 90 seconds once every 9 minutes that the unit is not running when it is set to cooling or heating mode. By circulating the air, the unit can detect hot or cold areas in the room and operate the unit to cool or warm the room as necessary. This function is only available when the fan mode is set to `AUTO' during COOL or HEAT Mode.

Desk Control Ready

All electronic VPAK units have low voltage terminals ready to connect a desk control energy management system. Controlling the unit's on/off operation from a remote location like the front desk can reduce energy usage and requires no additional accessories at the VPAK.

Indoor Coil Frost Sensor Auxiliary Fan Ready

The frost sensor protects the compressor from damage in the event that air" ow is reduced or low outdoor temperatures cause the indoor coil to freeze. When the indoor coil reaches 30°F the compressor is diabled and the fan continues to operate based on demand. Once the coil temperature returns to 45°F the compressor returns to operation.
The VPAK features a 24V AC terminal for connection to a relay that may be used to operate an auxiliary fan to transfer air to adjoining rooms. Auxiliary fans can provide air conditioning to odd shaped rooms.

Operation
Electronic Sequence of Operation
Note: Unit is operated by a wired remote wall t-stat which is connected to an electronic control board at the VPAK unit.
Compressor and Reversing Valve Control

Active Mode Cooling Heat - Pump Heat - Electric Fan Only

Compressor On On Off Off

Reversing Valve De-Energized Energized

Figure 341 (Compressor Operation)

Reversing Valve The reversing valve stays in the last state until a call for heat or cooling . The reversing valve only changes when required to provide coooling or heat pump. Leave the reversing valve in it's last state

until it's required to change.

Unit Cooling Mode

Once the ambient temperature rises past the cool demand set point of the t-stat (see figure below), and the

compressor is not locked out, the cooling cycle begins. As shown in the figure below, the fan is started 5 seconds

prior to the compressor. Once the ambient temperature has been lowered to the cool set point, the cooling cycle

starts to terminate by shutting off the compressor. After a 30 seconds delay, the fan is shut off.

Heating Mode Control Operation

There are two heating methods: Heat Pump and Electric Resistance Heat.

There are 2 Types of units that provide heating:

Cool / Heat Pump with Electric Heat and Cool with Electric heat.

Heat Mode in Cool with Electric Heat Units

When the t-stat is in the Heat Mode, if the indoor ambient temperature is below the heat set point, the fan turns on 5 sec-

onds prior then the electric heat will turn on. When the t-stat is satisfied, the electric heat will turn off. The fan turns off 15

seconds later.

Heat Pump With Electric Heat Operation

This heating has two heating methods. If the ambient indoor temperature is below the heat set point and the compressor is

not locked out, the compressor turns on. If the ambient temperature rises above the t-stat's heat set point, the compressor

turns off.

If the Compressor is Locked Out on the 3 Minute Time Delay and Electric Heat is Available

The control turns on the electric heat until the compressor is not locked out.

After lockout, the control turns off the electric heat, waits 5 seconds, then turns on the compressor.(The wired

remote wall t-stat's time delay may override this feature).

Condition 1 If the outdoor coil temperature sensor drops to 30 degrees F for less than 2 consecutive minutes, the unit will switch to electric heat if available. Thereafter, the unit will switch back to Heat Pump heat until the outdoor coil temperature sensor rises to 45 degrees F or greater.

OPERATION

Compressor Lock Out Time

The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly

from 180 to 240 seconds.

The compressor lockout is initiated every time the compressor is "off" due to:

(1)

Satisfying the T-stat temperature set point

(2)

Changing mode to fan only or heat

(3)

Turning the unit off

(4)

Power is restored after failure

(5)

Line power is restored from a brown out condition

Cooling Fan Delay
This is only for t-stat Fan Auto Mode only. When unit cycles cooling ON starts the fan 5 seconds EARLY. When unit cycles cooling OFF DELAYS the fan off for 30 seconds
Heating Fan Delay
This is only for Fan Auto Mode (Fan cycles with cool/heat operation) and not for continuous fan mode. When unit cycles Heating ON starts the fan 5 seconds EARLY. When unit cycles Heating OFF DELAYS the fan off for 15 seconds. Continuous fan operation enables fan to run continuously.
Fan Speed Change Delay
Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds and is used to eliminate relay chatter.
Room Air Sampling Feature
The room air sampling feature maintains a balanced temperature throughout the room by circulating the air for 90 seconds once every 9 minutes that the unit is not running when it is set to cooling or heating mode. By circulating the air, the unit can detect hot or cold areas in the room and operate the unit to cool or warm the room as neces-sary. This function is only available when the fan mode is set to `AUTO' during COOL or HEAT Mode.

Low Voltage Interface Connections
All Vert-I-Pak units have a low voltage interface connector through which a Remote Wall Thermostat, Desk Control and Auxiliary Fan's Relay can be connected. The interface connector is located on the electronic control board.

Interface Connector Definitions

Factory use only.

(Ensure there is no jumper at FP an F2)

Used with F1 to provide 24 VAC to external

fan relay. (Ensure there is no jumper at FP an F2

Used with F2 to provide 24 VAC to external fan relay.

Used with D1 for desk control on or off operation.

Used with D2 for desk control on or off operation.

Common Ground TerminaL

Call for high fan

Call for low fan

Call for heat pump reversing valve

Call for compressor

Call for heating

24V Power from Electronic Control to Wall

OPERATION
Remote Wall Thermostat All Friedrich Vert-I-Pak units are factory configured to be controlled by using a single stage heat/cool remote wired wall mounted thermostat. Thermostat Selection Friedrich recommends the use of the Friedrich RT4 and RT6. These thermostats are single stage heat/cool, manual changeover. The RT4 is a digital display thermostat with single speed fan control. The RT6 features a digital display, two fan speed selection, temperature limiting, status indicator light, room temperature offset, and backlight. Other thermostats may be used as long as they are single stage heat/cool and are configured correctly for the unit. Thermostat terminals requirements: For cooling with electric heat units: C, R, G, Y, W. For heat pump units: C, R, G, Y, W, B. For two fan speeds, thermostat must have 2 fan speed selection. HEAT PUMP UNITS During Heat Mode: The B terminal must be continuously energized. The W terminal must have 24 VAC output to call for heat. The control board decides on whether to turn on the Heat Pump Heat (compressor) or Electric Heat. The Y terminal should not have 24 VAC output during heat mode. Connecting a Remote Wall Thermostat CONNECT THERMOSTAT USING FIGURES ON FOLLOWING PAGE AS A GUIDE.
WARNING
ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.
1) Ensure jumper Is not Installed At FP And F2 2) Disconnect power to the unit. 3) Unscrew and remove the electrical control box's cover. 4) Locate the Interface Connector (24 VAC terminal strip (See figure 1 at left). 5) Make the wire connections according to the con figuration needed for your unit Use #18 gauge wire size. 6) Once each wire is matched and connected, the unit is now ready to be controlled by the thermostat. 7) Reattach the electrical control box's cover.
22

OPERATION
Remote Wall Thermostat Location
The thermostat should not be mounted where it may be affected by drafts, discharge air from registers (hot or cold), or heat radiated from the sun appliances, windows etc.. The thermostat should be located about 5 Ft. above the floor in an area of average temperature, with good air circulation. Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set-point. Electronic digital type thermostats should be level for aesthetics.
Note: An improperly operating or poorly located remote wall thermostat can be the source of perceived equipment problems. A careful check of the thermostat's location and wiring must be made then to ensure that it is not the source of problems.

Desk Control
The unit's electronic control has built-in provisions for connection to an external switch to control power to the unit. The switch can be a central desk control system or even a normally open door switch.

Maximum wire Length for Desk Control Switch

Wire Size

Maximum Length

#24 For desk control operation, connect one side of the switch to the D1 terminal and the other to the D2 terminal (See page 12). Whenever the switch closes, the unit operation #22

will stop.

#20

#18

400 ft. 600 ft. 900 ft. 1500 ft.

#16

2000 ft.

Auxiliary Fan Control
The electronic control also has the ability to control a 24 VAC relay to activate an auxiliary, or transfer fan. The outputs are listed as F1 and F2 on the interface connector (See page 12). To connect the relay, simply wire one side of the relay to F1 and the other side to F2. Anytime that the fan runs, the terminals will send a 24 VAC signal to the relay. The relay must be 24 VAC, 50mA or less. Note: The Desk Control, Auxiliary Fan relay and wires must be field supplied.

OPERATION
Unit Heat Control Operation - Heat Pump With Electric Heat
Automatic Emergency Heat If the sealed system fails with a bad reversing valve or anything that causes the indoor coil to get colder than the indoor ambient temperature:
1) If the indoor coil thermistor senses a 5 degree temperature drop as compared to the ambient temperature thermistor and this lasts up to 5 minutes, the control board will switch the unit to electric heat and continue heating with it. 2) At this point, error code 15 is generated; heat pump failure. Indoor coil temperature lower than indoor ambient temperature for 5 or more degrees for 5 consecutive minutes.
Note: It is Ok to continue to use the unit with the electric heater until the heat pump is repaired.
Heat Control Operation - Electric Heat Only
When in the Heat mode, with and without Fan Mode Auto (Fan cycling): If the indoor ambient temperature is below the Heat Demand Threshold (Heat Set Point minus 1.5 °F), turn on electric heat. If Ambient is 0.3 °F above the Heat Set Point turn off the electric heat.
System Mode Auto
This mode provides automatic change over between cool and heat. The auto mode runs based on the room ambient temperature vs. the Demand Thresholds. It is only available in Heat-Cool Unit.
Notes: There is a buffer zone between the cool and heat set points where no heating or cooling is allowed to occur. It is critical that the Cool Demand Threshold be greater than the Heat Demand Threshold by a minimum of 3° while in the Auto System Mode. For example, if a user enters a value for the Auto Cooling Set Point that violates the minimum delta 3° rule, the Auto Heating Set Point will adjust accordingly.
Automatic Change Over Delay (Cool with Heat Units) The change over delay ensures that any system heating or cooling over shoot does not trigger an opposite demand cycle. The change over delay = 15 min. This timer blocks the opposite demand cycle from running until the timer expires. As an example, if the last demand was a cool cycle, and another cool cycle is requested, the timer will not block the request. However, if the last demand cycle was a cool cycle, and heat cycle is requested, the timer will block the request until the change over delay is expired.
Compressor Lock Out Time
The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly from 180 to 240 seconds The compressor lockout is initiated every time the compressor is "off" due to:
(1) Satisfying the temperature set point (2) Changing mode to fan only or heat (3) Turning the unit off (4) Control is first plugged in or power is restored after failure (5) Line power is restored from a brown out condition
Cooling Fan Delay
Fan cycle/Auto mode only When unit cycles cooling ON starts the fan 5 seconds EARLY. When unit cycles cooling OFF DELAYS the fan off for 30 seconds.
24

OPERATION
Refrigeration Sequence Of Operation
A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be more difficult and time consuming, if not (in some cases) entirely impossible. The refrigeration system uses four basic principles in its operation which are as follows:

1. "Heat always flows from a warmer body to a cooler body."

2. "Heat must be added to or removed from a substance before a change in state can occur"

3. "Flow is always from a higher pressure area to a lower pressure area."

4. "The temperature at which a liquid or gas changes state is dependent upon the pressure."
The refrigeration cycle begins at the compressor when a demand is received from the thermostat. Starting the compressor creates a low pressure in the suction line which draws refrigerant gas (vapor) into the compressor. The compressor then "compresses" this refrigerant vapor, raising its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge line as a hot high pressure gas (vapor). The refrigerant enters the condenser coil where it gives up some of its heat. The condenser fan moving air across the coil's finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufficient quantity of heat has been removed from the refrigerant gas (vapor), the refrigerant will "condense" (i.e. change to a liquid). Once the refrigerant has been condensed (changed) to a liquid it is cooled even further by the air that continues to flow across the condenser coil.

The design determines at exactly what point (in the condenser) the change of state (i.e. gas to a liquid) takes place. In all cases, however, the refrigerant must be totally condensed (changed) to a liquid before leaving the condenser coil.

The refrigerant leaves the condenser coil through the liquid line as a warm high pressure liquid. It next will pass through the refrigerant drier (if equipped). It is the function of the drier to trap any moisture present in the system, contaminants, and large particulate matter.

The liquid refrigerant next enters the metering device. The metering device is called a capillary tube. The purpose of the metering device is to "meter" (i.e. control or measure) the quantity of refrigerant entering the evaporator coil. In the case of the capillary tube this is accomplished (by design) through size (and length) of device, and the pressure difference present across the device. Since the evaporator coil is under a lower pressure (due to the suction created by the compressor) than the liquid line, the liquid refrigerant leaves the metering device entering the evaporator coil. As it enters the evaporator coil, the larger area and lower pressure allows the refrigerant to expand and lower its temperature (heat intensity). This expansion is often referred to as "boiling" or atomizing. Since the unit's blower is moving indoor air across the finned surface of the evaporator coil, the expanding refrigerant absorbs some of that heat. This results in a lowering of the indoor air temperature, or cooling.

The expansion and absorbing of heat cause the liquid refrigerant to evaporate (i.e. change to a gas). Once the refrigerant has been evaporated (changed to a gas), it is heated even further by the air that continues to flow across the evaporator coil.

Suction Line

Discharge Line

Evaporator Coil

Condenser Coil

Metering

Compressor

Device Refrigerant Drier
Refrigerant Strainer

Liquid Line

The particular system design determines at exactly what point (in the evaporator) the change of state (i.e. liquid to a gas) takes place. In all cases, however, the refrigerant must be totally evaporated (changed) to a gas before leaving the evaporator coil.
The low pressure (suction) created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor. The refrigerant then returns to the compressor, where the cycle is repeated.

Coils & Chassis

Routine Maintenance

NOTE: Do not use a caustic cleaning agent on coils or base pan. Use a biodegradable cleaning agent and degreaser. The use of harsh cleaning materials may lead to deterioration of the aluminum fins or the coil end plates.

The indoor coil and outdoor coils and base pan should be inspected periodically (annually or semi-annually) and cleaned of all debris (lint, dirt, leaves, paper, etc.) as necessary. Under extreme conditions, more frequent cleaning may be required. Clean the coils with and base pan with a coil comb or soft brush and compressed air or vacuum. A low pressure washer device may also be used; however, you must be careful not to bend the aluminum fin pack. Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils.

NOTE: It is extremely important to insure that none of the electrical and/or electronic parts of the unit get wet when cleaning. Be sure to cover all electrical components to protect them from water or spray.

NOTE: When installed on or near sea coast environments, it recommended that all coils be cleaned at minimum biannually.

Decorative Front
Use a damp (not wet) cloth when cleaning the control area to prevent water from entering the unit, and possibly damaging the electronic control.
The decorative front and the cabinet can be cleaned with warm water and a mild liquid detergent. Do NOT use solvents or hydrocarbon based cleaners such as acetone, naphtha, gasoline, benzene, etc.
The indoor coil can be vacuumed with a dusting attachment if it appears to be dirty. DO NOT BEND FINS. The outdoor coil can be gently sprayed with a garden hose.
The air filter should be inspected weekly and cleaned if needed by vacuuming with a dust attachment or by cleaning in the sink using warm water and a mild dishwashing detergent. Dry the filter thoroughly before reinstalling. Use caution, the coil surface can be sharp.

Fan Motor & Compressor The fan motor & compressor are permanently lubricated and require no additional lubrication.

Wall Sleeve
Inspect the inside of the wall sleeve and drain system periodically (annually or semi-annually) and clean as required. Under extreme conditions, more frequent cleaning may be necessary. Clean both of these areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as needed.
Inspect for mold or mildew periodically. If present, ensure the sealing gasket around the unit is in good condition and not allowing outside air (or light) through the gasket.
Blower Wheel / Housing / Condensor Fan / Shroud
Inspect the indoor blower and its housing, evaporator blade, condenser fan blade and condenser shroud periodically (yearly or bi-yearly) and clean of all debris (lint, dirt, mold, fungus, etc.). Clean the blower housing area and blower wheel with an antibacterial / antifungal cleaner. Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud. Use warm or cold water when rinsing these items. Allow all items to dry thoroughly before reinstalling them.
Electrical / Electronic
Periodically (at least yearly or bi-yearly) inspect all control components: electronic, electrical and mechanical, as well as the power supply. Use proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform electrical tests. Use an air conditioning or refrigeration thermometer to check room, outdoor and coil operating temperatures.
Air Filter
To ensure proper unit operation, the air filter should be cleaned at least monthly, and more frequently if conditions warrant. The unit must be turned off before the filter is cleaned.
26

REMOVE AND INSTALL THE CHASSIS
Remove The Chassis

WARNING

ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be
the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury or death.

WARNING
CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.

Servicing / Chassis Quick Changeouts
The chassis is designed for quick disconnect and change out. For minor electrical service, the control box cover lifts straight up after the screws & disconnect head are removed. For major electrical, refrigeration and fan service the chassis may be removed from utility closet.

To Remove the Chassis from the Closet:

Disconnect the power coming into the unit from the main breaker panel or the closet mounted disconnect.

Switch the wall Thermostat off.

Pull the Power Disconnect located in the front of the chassis.

Disconnect the electrical connection.

Disconnect the duct work.

Disconnect condensate drain on 9-18,000 BTU models (2018 18,000 BTU models excluded).

Slide the chassis out of the wall plenum.

Lift the chassis out of the utility closet.

R-410A SEALED SYSTEM REPAIR

WARNING
Refrigeration system under high pressure
O service this equipment. R410A systems operate at higher pressures than R22 equipment. Appropriate safe service and handling practicces must be used. Only use gauge sets designed for use with R410A. Do not use standard R22 gauge sets.

The following is a list of important considerations when working with R-410A equipment 1. R-410A pressure is approximately 60% higher than R-22 pressure. 2. R-410A cylinders must not be allowed to exceed 125 F, they may leak or rupture. 3. R-410A must never be pressurized with a mixture of air, it may become flammable. 4. Servicing equipment and components must be specifically designed for use with R-410A and dedicated to prevent contamination.

WARNING

5. Manifold sets must be equipped with gauges capable of reading 750 psig (high side) and 200 psig (low side), with a

EPA 608 Warning: It is a violation of the environmental Protection Agency, Claus608A, to service refrigeration systems without proper certi cation

500-psig low-side retard. 6. Gauge hoses must have a minimum 750-psig service pressure rating 7. Recovery cylinders must have a minimum service pressure rating of 400 psig, (DOT 4BA400 and DOT BW400 approved

cylinders).

8. POE (Polyol-Ester) lubricants must be used with R-410A equipment.

9. To prevent moisture absorption and lubricant contamination, do not leave the refrigeration system open to the atmosphere

longer than 1 hour.

10. Weigh-in the refrigerant charge into the high side of the system.

11. Introduce liquid refrigerant charge into the high side of the system.

12. For low side pressure charging of R-410A, use a charging adaptor.

13. Use Friedrich approved R-410A filter dryers only.

IMPORTANT
SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER. EQUIPMENT REQUIRED: 1. Eletrical Multimeter 2. E.P.A. Approved Refrigerant Recovery System 3. Vacuum Pump (capable of 200 microns or less vacuum.) 4. Acetylene Welder 5. Electronic Halogen Leak Detector capable of detecting HFC (Hydrofluorocarbon) refrigerants. 6. R410A Refrigerant Manifold 7. 1/4" Braze-type Access Ports 8. Pinch Tool 9. Refrigerant Scale 10. Vacuum Gauge - (0 - 1000 microns) 11. Facilities for flowing nitrogen through refrigeration tubing during all brazing processes.
EQUIPMENT MUST BE CAPABLE OF: 1. Recovering refrigerant to EPA required levels. 2. Evacuation from both the high side and low side of the system simultaneously. 3. Introducing refrigerant charge into high side of the system. 4. Accurately weighing the refrigerant charge introduced into the system.
28

R-410A SEALED SYSTEM REPAIRS
WARNING
RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.
Failure to do so could result in electric shock, serious injury or death.
WARNING
HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure.
Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.
Failure to follow these procedures could result in serious injury or death.
Refrigerant Charging
NOTE: Because the refrigerant system is a sealed system, service process tubes will have to be installed. First install a line tap and remove refrigerant from system. Make necessary sealed system repairs and vacuum system. Crimp process tube line and solder end shut. Do not leave a service valve in the sealed system.
Proper refrigerant charge is essential to proper unit operation. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or efficiency. Accordingly, the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged.
Too much refrigerant (overcharge) in the system is just as bad (if not worse) than not enough refrigerant (undercharge). They both can be the source of certain compressor failures if they remain uncorrected for any period of time. Quite often, other problems (such as low air flow across evaporator, etc.) are misdiagnosed as refrigerant charge problems. The refrigerant circuit diagnosis chart will assist you in properly diagnosing the systems.
An overcharged unit will return liquid refrigerant (slugging) back to the suction side of the compressor eventually causing a mechanical failure within the compressor. This mechanical failure can manifest itself as valve failure, bearing failure, and/or other mechanical failure. The specific type of failure will be influenced by the amount of liquid being returned, and the length of time the slugging continues.
Not enough refrigerant (undercharge) on the other hand, will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor. When this occurs, the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector. Continued overheating of the motor windings and/or cycling of the overload will eventually lead to compressor motor or overload failure.
29

R-410A SEALED SYSTEM REPAIRS

WARNING
RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.
Failure to do so could result in electric shock, serious injury or death.

Undercharged Refrigerant Systems
An undercharged system will result in poor performance (low pressures, etc.) in both the heating and cooling cycle.
Whenever you service a unit with an undercharge of refrigerant, always suspect a leak. The leak must be repaired before charging the unit.
To check for an undercharged system, turn the unit on, allow the compressor to run long enough to establish working pressures in the system (15 to 20 minutes).

WARNING
HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure.
Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.
Failure to follow these procedures could result in serious injury or death.

During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator; an intermittent hissing and gurgling sound indicates a low refrigerant charge. Intermittent frosting and thawing of the evaporator is another indication of a low charge, however, frosting and thawing can also be caused by insufficient air over the evaporator or partial restriction in the refrigeration system besides the metering device..
Checks for an undercharged system can be made at the compressor. If the compressor seems quieter than normal, it is an indication of a low refrigerant charge.

A check of the amperage drawn by the compressor motor should show a lower reading. (Check the Unit Specification.) After the unit has run 10 to 15 minutes, check the gauge pressures. Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures.

Figure 601 (Undercharged System) 30

R-410A SEALED SYSTEM REPAIRS

Overcharged Refrigerant Systems

WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.

Whenever an overcharged system is indicated, always make sure that the problem is not caused by air flow problems. Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged system.

Failure to do so could result in electric shock, serious injury or death.

An overcharge can cause the compressor to fail, since it would be "slugged" with liquid refrigerant. The charge for any system is critical. When the compressor is noisy, suspect an overcharge, when you are sure that the air quantity over the evaporator coil is correct. Icing of the evaporator will not be encountered because the refrigerant will boil later if at all. Gauges connected to system will usually have higher head pressure (depending upon amount of over charge). Suction pressure should be slightly higher.

WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant and oil under high pressure.

Compressor amps will be near normal or higher. Noncondensables can also cause these symptoms. To confirm, reclaimsome of the charge, if conditions improve, system may be overcharged. If conditions don't improve, Noncondensables are indicated.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Figure 602 (Overcharged System) 31

R-410A SEALED SYSTEM REPAIRS
Restricted Refrigerant System
Troubleshooting a restricted refrigerant system can be difficult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions. A partial restriction allows some of the refrigerant to circulate through the system. With a complete restriction there is no circulation of refrigerant in the system. Restricted refrigerant systems display the same symptoms as a "low-charge condition." When the unit is shut off, or the compressor disengages, the gauges may equalize very slowly. A quick check for either condition begins at the evaporator. With a partial restriction, there may be gurgling sounds at the metering device entrance to the evaporator. The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device. Frost may continue on the suction line back to the compressor. Often a partial restriction of any type can be found by feel, as there is a temperature difference from one side of the restriction to the other. With a complete restriction, there will be no sound at the metering device entrance. An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation. With a complete restriction the current drawn may be considerably less than normal, as the compressor is running in a deep vacuum (no load.) Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there. The following conditions are based primarily on a system in the cooling mode.
Figure 603 (Restricted System) 32

R-410A SEALED SYSTEM REPAIRS
Sealed System Method of Charging/ Repairs

WARNING
BURN HAZARD Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.
Failure to follow these procedures could result in moderate or serious injury.

CAUTION
FREEZE HAZARD Proper safety procedures must be followed, and proper protective clothing must be worn when working with liquid refrigerant.
Failure to follow these procedures could result in minor to moderate injury.

The refrigerant cycle is critically charged. The only acceptable method for charging the sealed system is the Weighed in Charge Method.
The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps:
1. Install a piercing valve to remove refrigerant from the sealed system. (Piercing valve must be removed from the system before recharging.) 2. Recover Refrigerant in accordance with EPA regulations. 3. Install a process tube to sealed system. 4. Make necessary repairs to system. 5. Evacuate system to 200 microns or less. 6. Weigh in refrigerant with the property quantity of R-410A refrigerant. 7. Start unit, and verify performance. 8. Crimp the process tube and solder the end shut.

EXTERNAL STATIC PRESSURE
External Static Pressure can best be described as the pressure difference (drop) between the Positive Pressure (discharge) and the Negative Pressure (intake) sides of the blower. External Static Pressure is developed by the blower as a result of resistance to airflow (Friction) in the air distribution system EXTERNAL to the VERT-I-PAK cabinet. Resistance applied externally to the VERT-I-PAK (i.e. duct work, filters, etc.) on either the supply or return side of the system causes an INCREASE in External Static Pressure accompanied by a REDUCTION in airflow. External Static Pressure is affected by two factors.
1.Resistance 2.Blower Speed (Changing to a higher or lower blower speed will raise or lower the External Static Pressure accord ingly). These affects must be understood and taken into consideration when checking External Static Pressure/Airfl ow to insure that the system is operating within design conditions. Operating a system with insufficient or excessive airflow can cause a variety of different operating problems. Among these are problems such as, reduced capacity, freezing evaporator coils, premature compressor' heating component failures, and/ or other air local distribution issues.. System airflow should always be verified upon completion of a new installation, or before a change-out, compressor replacement, or in the case of heat strip failure to insure that the failure was not caused by improper airflow.

Checking External Static Pressure

The airflow through the unit can be determined by measuring the external static pressure of the system, and consulting the

blower performance data for the specific VERT-I-PAK.

1. Set up to measure external static pressure at the supply and return air.

2. Ensure the coil and filter are clean, and that all the registers are open.

3. Determine the external static pressure with the blower operating.

Use an incline or dual port manometer to measure. Measurement should be taken roughly 3-6" from the Vert-I-Pak

collar and the center of the indoor coil with the filter installed.

4. Refer to the Air Flow Data for your VERT-I-PAK system to find the actual airflow for factory-selected fan speeds.

5. If the actual airfl ow is either too high or too low, the blower speed will need to be changed to appropriate setting

the ductwork will need to be reassessed and corrections made as required.

6. Select a speed, which most closely provides the required airflow for the system.

7. Recheck the external static pressure with the new speed. External static pressure (and actual airflow) will have

changed to a higher or lower value depending upon speed selected. Recheck the actual airflow (at this "new" static

pressure) to confirm speed selection.

8. Repeat steps 8 and 9 (if necessary) until proper airfl ow has been obtained.

EXAMPLE: Airflow requirements are calculated as follows: (Having a wet coil creates additional resistance to airflow. This ad-

ditional resistance must be taken into consideration to obtain accurate airflow information.

Figure 604 34

External Static Pressure

Determining the Indoor CFM

ESP (`)

VEA 09 / VHA 09

VEA 12 / VHA 12

.00"

340

385

420

470

.10"

300*

340

350*

420*

.20"

230

280

290

350

.30"

140

190

250

300

.40"
* values indicate rated performance point Table XXX (determining Indoor CFM)

VEA 18 / VHA 18

430

480

400

450*

340

400

290

330

VEA 24 / VHA 24

690

740

610*

700

560

640

510

580

450

520

Correct CFM (if needed): Correction Multipliers

230V

1.00

208V

0.97

265V

Heating

1.00

Cooling

0.95

Explanation of charts
Chart A is the nominal dry coil VERT-I-PAK CFMs. Chart B is the correction factors beyond nominal conditions. 1 ½ TON SYSTEM ( 18,000 Btu) Operating on high speed @ 230 volts with dry coil measured external static pressure .10 Air Flow = 450 CFM In the same SYSTEM used in the previous example but having a WET coil you must use a correction factor of .95 (i.e. 450 x .95=428 CFM) to allow for the resistance (internal) of the condensate on the coil. It is important to use the proper procedure to check external Static Pressure and determine actual airfl ow. Since in the case of the VERT-I-PAK, the condensate will cause a reduction in measured External Static Pressure for the given airfl ow. It is also important to remember that when dealing with VERT-l-PAK units that the measured External Static Pressure increases as the resistance is added externally to the cabinet. Example: duct work, fi lters, grilles.

Indoor Airflow Data
The Vert-I-Pak A series units must be installed with a free return air configuration. The table below lists the indoor airflow at corresponding static pressures. All units are rarted at low speed. The Vert-I-Pak units are designed for either single speed or two fan speed operation. For single speed operation refer to the airflow table below and select the most appropriate CFM based on the ESP level. Connect the fan output from the thermostat to the unit on either the GL terminal for low speed or to the GH terminal for high speed operation. For thermostats with two-speed fan outputs connect the low speed output to the unit GL terminal and the high speed output to the GH terminal.

Ductwork Preparation
If flex duct is used, be sure all the slack is pulled out of the flex duct. Flex duct ESP can increase considerably when not fully extended. DO NOT EXCEED a total of .30 ESP, as this is the MAXIMUM design limit for the VERT-I-PAK A-Series unit. IMPORTANT: FLEX DUCT CAN COLLAPSE AND CAUSE AIRFLOW RESTRICTIONS. DO NOT USE FLEX DUCT FOR: 90 DEGREE BENDS, OR UNSUPPORTED RUNS OF 5 FT. OR MORE.

External Static Pressure
Fresh Air Door
The Fresh Air Door is an "intake" system. The fresh air door opened via a slide on the front of the chassis located just above the indoor coil. Move the slide left to open and right to close the fresh air door. The system is capable of up to 60 CFM of fresh air @ ~.3" H20 internal static pressure.
Checking Approximate Airflow
If an inclined manometer or Magnehelic gauge is not available to check the External Static Pressure, or the blower performance data is unavailable for your unit, approximate air fl ow call be calculated by measuring the temperature rise, then using tile following criteria.

Kilowatts × 3413 CFM = Temp Rise × 1.08

Electric Heat Strips

The approximate CFM actually being delivered can be calculated by using the following formula:

DO NOT simply use the Kilowatt Rating of the heater (i.e. 2.5, 3.4, 5.0) as this will result in a less-than-correct airfl ow cal-

culation. Kilowatts may be calculated by multiplying the measured voltage to the unit (heater) times the measured current

draw of all heaters (ONLY) in operation to obtain watts. Kilowatts are than obtained by dividing by 1000.

EXAMPLE: Measured voltage to unit (heaters) is 230 volts. Measured Current Draw of strip heaters is 11.0 amps.

230 x 11.0 = 2530

2530/1000 = 2.53 Kilowatts

2.53 x 3413 = 8635

Supply Air =

95°F

Return Air =

- 75°F

Temperature Rise = 20°F

20 x 1.08 = 21.6

8635 21.6 = 400

COMPONENT TESTING
Hermetic Components Check

WARNING
CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.

Metering Device - Capillary Tube Systems All units are equipped with capillary tube metering devices. Checking for restricted capillary tubes. 1. Connect pressure gauges to unit. 2. Start the unit in the cooling mode. If after a few minutes of operation the pressures are normal, the check valve and the cooling capillary are not restricted. 3. Switch the unit to the heating mode and observe the gauge readings after a few minutes running time. If the system pressure is lower than normal, the heating capillary is restricted. 4. If the operating pressures are lower than normal in both the heating and cooling mode, the cooling capillary is restricted.

Check Valve A unique two-way check valve is used on the reverse cycle heat pumps. It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle.

NOTE: The slide (check) inside the valve is made of teflon. Should it become necessary to replace the check valve, place a wet cloth around the valve to prevent overheating during the brazing operation.

One-way Check Valve (Heat Pump Models)
Figure 701 (Check Valve)

CHECK VALVE OPERATION In the cooling mode of operation, high pressure liquid enters the check valve forcing the slide to close the opposite port (liquid line) to the indoor coil. Refer to refrigerant flow chart. This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil. In the heating mode of operation, high pressure refrigerant enters the check valve from the opposite direction, closing the port (liquid line) to the outdoor coil. The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil. Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil. This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line.

COOLING MODE In the cooling mode of operation, liquid refrigerant from condenser (liquid line) enters the cooling check valve forcing the heating check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator. (Note: liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode).

HEATING MODE In the heating mode of operation, liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils. (Note: liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode).

COMPONENT TESTING
Reversing Valve Description And Operation
The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils. It consists of a pressure-operated, main valve and a pilot valve actuated by a solenoid plunger. The solenoid is energized during the heating cycle only. The reversing valves used in the RAC system is a 2-position, 4-way valve. The single tube on one side of the main valve body is the high-pressure inlet to the valve from the compressor. The center tube on the opposite side is connected to the low pressure (suction) side of the system. The other two are connected to the indoor and outdoor coils. Small capillary tubes connect each end of the main valve cylinder to the "A" and "B" ports of the pilot valve. A third capillary is a common return line from these ports to the suction tube on the main valve body. Four-way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve. The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system. The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift. NOTE: System operating pressures must be near normal before valve can shift.
B A
Figure 702 (Reversing Valve) 38

COMPONENT TESTING
Testing The Reversing Valve Solenoid Coil
WARNING
ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.
The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle.
1. Turn off high voltage electrical power to unit. 2. Unplug line voltage lead from reversing valve coil. 3. Check for electrical continuity through the coil. If you do not have continuity replace the coil. 4. Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug. There should be no continuity between either of the coil leads and ground; if there is, coil is grounded and must be replaced. 5. If coil tests okay, reconnect the electrical leads. 6. Make sure coil has been assembled correctly.
NOTE: Do not start unit with solenoid coil removed from valve, or do not remove coil after unit is in operation. This will cause the coil to burn out.
WARNING BURN HAZARD Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch. Failure to follow these procedures could result in moderate or serious injury.
Touch Test in Heating/Cooling Cycle
WARNING
BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns. Proper safety procedures must be followed, and proper protective clothing must be worn. Failure to follow these procedures could result in minor to moderate injury.
The only definite indications that the slide is in the mid-position is if all three tubes on the suction side of the valve are hot after a few minutes of running time.
NOTE: If both tubes shown as hot or cool are not the same corresponding temperature, refer to figure 703, then the reversing valve is not shifting properly.
39

COMPONENT TESTING
Checking The Reversing Valve
WARNING
HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure. Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants. Failure to follow these procedures could result in serious injury or death.
NOTE: You must have normal operating pressures before the reversing valve can shift. Check the operation of the valve by starting the system and switching the operation from "Cooling" to "Heating" and then back to "Cooling". Rapidly cycle. Do not hammer on valve. Occasionally, the reversing valve may stick in the heating or cooling position or in the mid-position. When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure. Should the valve fail to shift from cooling to heating, block the air flow through the outdoor coil and allow the discharge pressure to build in the system. Then switch the system from heating to cooling. If the valve is stuck in the heating position, block the air flow through the indoor coil and allow discharge pressure to build in the system. Then switch the system from heating to cooling. Should the valve fail to shift in either position after increasing the discharge pressure, replace the valve. Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting. If you determing this is the problem, replace the reversing valve. After all of the previous inspections and checks have been made and determined correct, then perform the "Touch Test" on the reversing valve.
Reversing Valve in Heating Mode Figure 703 (Checking The Reversing Valve)
40

COMPONENT TESTING
Replace The Reversing Valve

NOTICE
FIRE HAZARD The use of a torch requires extreme care and proper judgment. Follow all safety recommended precautions and
notice could result in moderate to serious property damage.

1. Install Process Tubes. Recover refrigerant from sealed system. PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED. 2. Remove solenoid coil from reversing valve. If coil is to be reused, remove solenoid and protect from heat while changing valve. 3. Unbraze all lines from reversing valve. 4. Clean all excess braze from all tubing so that they will slip into fittings on new valve. 5. Remove solenoid coil from new valve. 6. Protect new valve body from heat while brazing with plastic heat sink (Thermo Trap) or wrap valve body with wet rag. 7. Fit all lines into new valve and braze lines into new valve.
WARNING
EXPLOSION HAZARD The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.
Failure to follow proper safety procedures could result in serious injury or death.

8. Pressurize sealed system with a combination of R-410A and nitrogen. Pressurize system to 550 psi and triple evacuate. Check for leaks, using a suitable leak detector. Recover refrigerant per EPA guidelines. 9. Once the sealed system is leak free, install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate. Crimp the process tubes and solder the ends shut. Do not leave Schrader or piercing valves in the sealed system.
NOTE: When brazing a reversing valve into the system, it is of extreme importance that the temperature of the valve does not exceed 250°F at any time.
Wrap the reversing valve with a large rag saturated with water. "Re-wet" the rag and thoroughly cool the valve after each brazing operation of the four joints involved.
The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection.

COMPONENT TESTING
Touch Test Chart : To Service Reversing Valves

DISCHAfDIrRoSCmGHCAEoRmGTpEreUTsUsBoBrEE from Compressor SUCTIO tSoNUCCTToImOUpNrBeTsEUsBotrEo Compressor Tube toTuIbeNtoS IINDSIEDE COILCOIL
Tube to OUTSIDE COIL
LEFT Pilot
LEFTCapiPlillaroyt Tube Capillary Tube
RIGHCTaRIpilGlPiHalrTyoPtiTluotbe Capillary Tube

VALVE OPERATING CONDITION

NORMAL FUNCTION OF VALVE

NOTES:

* TEMPERATURE OF VALVE BODY ** WARMER THAN VALVE BODY

1 2 3 45 6

POSSIBLE CAUSES

CORRECTIONS

Normal Cooling Hot

Cool

Cool as (2)

Hot as (1)

*TVB

TVB

Normal Heating Hot

Cool

Hot as (1)

Cool as (2)

*TVB

TVB

MALFUNCTION OF VALVE

Check Electrical circuit and coil

No voltage to coil. Defective coil.

Repair electrical circuit. Replace coil.

Check refrigeration charge

Low charge. Pressure differential too high.

Repair leak, recharge system. Recheck system.

Valve will not

shift from cool

to heat.

Hot

Cool

Cool, as (2)

Hot, as (1)

*TVB

Deenergize solenoid, raise head pressure,

reenergize solenoid to break dirt loose.

Hot

Pilot valve okay. Dirt in one bleeder hole.

If unsuccessful, remove valve, wash out. Check on air before installing. If no

movement, replace valve, add strainer to

discharge tube, mount valve horizontally.

Piston cup leak

Stop unit. After pressures equalize, restart with solenoid energized. If valve shifts, reattempt with compressor running. If still no shift, replace valve.

Hot

Cool

Cool, as (2)

Hot, as (1)

*TVB

*TVB Clogged pilot tubes.

Raise head pressure, operate solenoid to free. If still no shift, replace valve.

Valve will not shift from cool Hot
to heat.

Cool

Cool, as (2)

Hot, as (1)

Hot

Raise head pressure, operate solenoid

Hot

Both ports of pilot open. (Back seat port did not close).

to free partially clogged port. If still no shift, replace

valve.

Warm

Cool

Cool, as (2)

Hot, as (1)

*TVB

Warm Defective Compressor.

Replace compressor

Hot

Warm Warm

Hot *TVB

Not enough pressure differential at start Check unit for correct operating pressures

Hot of stroke or not enough fl ow to maintain and charge. Raise head pressure. If no

pressure differential.

shift, use valve with smaller port.

Starts to shift Hot but does not

complete

Hot

reversal.

Hot

Apparent

Hot

leap in heat-

ing.

Hot

Hot
Will not shift from heat to
cool.
Hot
14
Hot

Warm Warm

Hot

Cool Cool Cool

Hot, as (1)
Hot, as (1)
Hot, as (1)

Cool

Hot, as (1)

Cool

Hot, as (1)

Cool

Hot, as (1)

Hot Hot Hot *TVB

Hot Hot

Cool, as (2)

*TVB

Cool, as (2)

**WVB

Cool, as (2)

*TVB

Cool, as (2)

Hot

Cool, as (2)

Hot

Cool, as (2)

Hot

Body damage. Hot Both ports of pilot open. Hot Body damage.
Valve hung up at mid-stroke. Pumping volume of compressor not suffi cient to maintain reversal. Hot Both ports of pilot open. *TVB Piston needle on end of slide leaking. **WVB Pilot needle and piston needle leaking. *TVB Pressure differential too high. Clogged pilot tube.
*TVB Dirt in bleeder hole.
*TVB Piston cup leak.
Hot Defective pilot.

Replace valve
Raise head pressure, operate solenoid. If no shift, use valve with smaller ports.
Replace valve
Raise head pressure, operate solenoid. If no shift, use valve with smaller ports.
Raise head pressure, operate solenoid. If no shift, replace valve.
Operate valve several times, then recheck. If excessive leak, replace valve.
Operate valve several times, then recheck. If excessive leak, replace valve.
Stop unit. Will reverse during equalization period. Recheck system
Raise head pressure, operate solenoid to free dirt. If still no shift, replace valve.
Raise head pressure, operate solenoid. Remove valve and wash out. Check on air before reinstalling, if no movement, replace valve. Add strainer to discharge tube. Mount valve horizontally.
Stop unit. After pressures equalize, restart with solenoid deenergized. If valve shifts, reattempt with compressor running. If it still will not reverse while running, replace the valve.
Replace valve.

Warm

Cool

Warm, as (1)

Cool, as (2)

Warm

*TVB Defective compressor.

Replace compressor

Figure 704 (Touch Test Chart)

COMPONENT TESTING
Compressor Checks

WARNING
ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be
the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury or death.

Locked Rotor Voltage (L.R.V.) Test Locked rotor voltage (L.R.V.) is the actual voltage available at the compressor under a stalled condition.

Single Phase Connections Disconnect power from unit. Using a voltmeter, attach one lead of the meter to the run "R" terminal on the compressor and the other lead to the common "C" terminal of the com-pressor. Restore power to unit.

Determine L.R.V. Start the compressor with the volt meter attached; then stop the unit. Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter. The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize. Voltage should be at or above minimum voltage of 197 VAC, as specified on the rating plate. If less than minimum, check for cause of inadequate power supply; i.e., incorrect wire size, loose electrical connections, etc.

Amperage (R.L.A) Test The running amperage of the compressor is the most important of these readings. A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically.

Single Phase Running and L.R.A. Test NOTE: Consult the specification and performance section for running amperage. The L.R.A. can also be found on the rating plate. Select the proper amperage scale and clamp the meter probe around the wire to the "C" terminal of the compressor. Turn on the unit and read the running amperage on the meter. If the compressor does not start, the reading will indicate the locked rotor amperage (L.R.A.).

Overloads The compressor is equipped with either an external or internal overload which senses both motor amperage and winding temperature. High motor temperature or amperage heats the overload causing it to open, breaking the common circuit within the compressor. Heat generated within the compressor shell, usually due to recycling of the motor, is slow to dissipate. It may take anywhere from a few minutes to several hours for the overload to reset.

Checking the Overloads

External Overloads VPAK 9, 12, and 18K Btus With power off, remove the leads from compressor terminals. If the compressor is hot, allow the overload to cool before starting check. Using an ohmmeter, test continuity across the terminals of the external overload. If you do not have continuity; this indicates that the overload is open and must be replaced.

Internal Overloads VPAK 24k Btus The overload is embedded in the motor windings to sense the winding temperature and/or current draw. The overload is connected in series with the common motor terminal. Should the internal temperature and/or current draw become excessive, the contacts in the overload will open, turning off the compressor. The overload will automatically reset, but may require several hours before the heat is dissipated.

Checking the Internal Overload 1. With no power to unit, remove the leads from the compressor terminals. 2. Using an ohmmeter, test continuity between terminals C-S and C-R. If no continuity, the compressor overload is open and the compressor must be replaced.
43

COMPONENT TESTING
Compressor Checks

Single Phase Resistance Test Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1). Touch the leads of the ohmmeter from terminals common to start ("C" to "S"). Next, touch the leads of the ohmmeter from terminals common to run ("C" to "R"). Add values "C" to "S" and "C" to "R" together and check resistance from start to run terminals ("S" to "R"). Resistance "S" to "R" should equal the total of "C" to "S" and "C" to "R." In a single phase PSC compressor motor, the highest value will be from the start to the run connections ("S" to "R"). The next highest resistance is from the start to the common connections ("S" to "C"). The lowest resistance is from the run to common. ("C" to "R") Before replacing a compressor, check to be sure it is defective.

GROUND TEST Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (clean point of contact as a good connection is a must) and the other probe in turn to each compressor terminal. If a reading is obtained the compressor is grounded and must be replaced. Check the complete electrical system to the compressor and compressor internal electrical system, check to be certain that
compressor is not out on internal overload. Complete evaluation of the system must be made whenever you suspect the compressor is defective. If the compressor has been operating for sometime, a careful examination must be made to determine why the compressor failed. Many compressor failures are caused by the following conditions: 1.Improper air flow over the evaporator. 2.Overcharged refrigerant system causing liquid to be returned to the compressor. 3.Restricted refrigerant system. 4.Lack of lubrication. 5.Liquid refrigerant returning to compressor causing oil to be washed out of bearings. 6.Noncondensables such as air and moisture in the system. Moisture is extremely Figure 705 (Resistance Chart) destructive to a refrigerant system. 7.Capacitor.

CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefficiency is normally due to broken or damaged suction and/or discharge valves, reducing the

ability of the compressor to pump refrigerant gas.

This condition can be checked as follows:

1. Install a piercing valve on the suction and discharge or liquid process tube.

2. Attach gauges to the high and low sides of the system.-

3. Start the system to operate the compressor and run a "cooling or heating perfor mance test." If test shows:

Below normal high side pressure

Above normal low side pressure

Low temperature difference across coil

The compressor valves are faulty - replace the compressor.

COMPONENT TESTING

Compressor Replacement

1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing.

2. Recover all refrigerant from the system though the process tubes. PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED. Do not use gauge manifold for this purpose if there has been a burnout. You will contaminate your manifold and hoses. Use a Schrader valve adapter and copper tubing for burnout failures.
3.After all refrigerant has been recovered, disconnect suction and discharge lines from the compressor and remove compressor. Be certain to have both suction and discharge process tubes open to atmosphere.

4.Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container.
5.Using an acid test kit (one shot or conventional kit), test the oil for acid content according to the instructions with the kit.
6.If any evidence of a burnout is found, no matter how slight, the system will need to be cleaned up following proper procedures.

Failure to follow these procedures could result in serious injury or death.
WARNING
EXPLOSION HAZARD The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc. Failure to follow proper safety procedures could result in serious injury or death.

7.Install the replacement compressor. 8. Pressurize with a combination of R-410A and nitrogen and leak test all connections with an electronic or Halide leak detector. Recover refrigerant and repair any leaks found. 8a. If leak detector is unavailable remove all refrigerant from system and pressurize with nitrogen to 350 psi. Check that system holds pressure.
Repeat Step 8 to insure no more leaks are present
9. Evacuate the system with a good vacuum pump capable of a final vacuum of 200 microns or less. The system should be evacuated through both liquid line and suction line gauge ports. While the unit is being evacuated, seal all openings on the defective compressor. Compressor manufacturers will void warranties on units received not properly sealed. Do not distort the manufacturers tube connections.

10. Recharge the system with the correct amount of refrigerant. The proper refrigerant charge will be found on the unit rating plate. The use of an accurate measuring device, such as a charging cylinder, electronic scales or similar device is necessary.

COMPONENT TESTING

Compressor Replacement -Special Procedure in Case of Compressor Burnout

1. Recover all refrigerant and oil from the system.

2. Remove compressor, capillary tube and filter drier from the

system.

3. Flush evaporator condenser and all connecting tubing with dry

nitrogen or equivalent. Use approved flushing agent to remove all

contamination from system. Inspect suction and discharge line for

WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant and oil under high pressure.

carbon deposits. Remove and clean if necessary. Ensure all acid is neutralized. 4. Reassemble the system, including new drier strainer and capillary tube.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.
Failure to follow these procedures could result in serious injury or death.

5. Pressurize with a combination of R-410A and nitrogen and leak test all connections with an electronic or Halide leak detector. Recover refrigerant and repair any leaks found. 5a. If leak detector is unavailable remove all refrigerant from system and pressurize with nitrogen to 350 psi. Check that system holds pressure.

Repeat Step 5 to insure no more leaks are present
6. Evacuate the system with a good vacuum pump capable of a final vacuum of 200 microns or less. The system should be evacuated through both liquid line and suction line gauge ports. While the unit is being evacuated, seal all openings on the defective compressor. Compressor manufacturers will void warranties on units received not properly sealed. Do not distort the manufacturers tube connections.

WARNING
EXPLOSION HAZARD The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.
Failure to follow proper safety procedures could result in serious injury or death.

7. Recharge the system with the correct amount of refrigerant. The proper refrigerant charge will be found on the unit rating plate. The use of an accurate measuring device, such as a charging cylinder, electronic scales or similar device is necessary.
ROTARY AND SCROLL COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE
Troubleshooting and servicing rotary compressors is basically the same as on the reciprocating compressor with only one main exception:

WARNING
NEVER, under any circumstances, liquid charge a rotary-compressor through the LOW side. Doing so would cause permanent damage to the new compressor. Use a charging adapter.

COMPONENTS TESTING

Fan Motor
A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan. A selfresetting overload is located inside the motor to protect against high temperature and high amperage conditions.

WARNING
ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Figure 706 (Blower/ Fan Motor)

Blower / Fan Motor Test 1. Visually inspect the motor's wiring, housing etc., and determine that the capacitor is serviceable. 2. Make sure the motor has cooled down. 3. Disconnect the fan motor wires from the control board. 4. Test for continuity between the windings also, test to ground. 5. If any winding is open or grounded replace the motor. 6. Apply "live" test cord probes on black wire and common terminal of capacitor. Motor should run at high speed. 7. Apply "live" test cord probes on red wire and common terminal of capacitor. Motor should run at low speed. 8. Apply "live" test cord probes on each of the remaining wires from the speed switch or system switch to test intermediate speeds.

Capacitors

WARNING
ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Dual Rated Run Capacitor Hook-up

Failure to do so could result in serious injury or death.

Figure 707 Dual Rated Capacitor Hook-Up

Many motor capacitors are internally fused. Shorting the terminals will blow the fuse, ruining the capacitor. A 20,000 ohm 2 watt resistor can be used to discharge capacitors safely. Remove wires from capacitor and place resistor across terminals. When checking a dual capacitor with a capacitor analyzer or ohmmeter, both sides must be tested. Capacitor Check with Capacitor Analyzer The capacitor analyzer will show whether the capacitor is "open" or "shorted." It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power-factor percentage. The instrument will automatically discharge the capacitor when the test switch is released. Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor. This damage usually can be avoided by proper connection of the running capacitor terminals. From the supply line on a typical 230 volt circuit, a 115 volt potential exists from the "R" terminal to ground through a possible short in the capacitor. However, from the "S" or start terminal, a much higher potential, possibly as high as 400 volts, exists because of the counter EMF generated in the start winding. Therefore, the possibility of capacitor failure is much greater when the identified terminal is connected to the "S" or start terminal. The identified terminal should always be connected to the supply line, or "R" terminal, never to the "S" terminal. When connected properly, a shorted or grounded running capacitor will result in a direct short to ground from the "R" terminal and will blow the line fuse. The motor protector will protect the main winding from excessive temperature.

COMPONENTS TESTING
Heating Element and Limit Switch

Heating Element Example
Figure 708 (Heating Element)

All heat pumps and electric heat models are equipped with a heating element and a limit switch (bimetal ther-mostat). The limit is in series with the element and will interrupt the power at a designed temperature. Should the blower motor fail, filter become clogged or air-flow be restricted etc., the high limit switch will open and interrupt the power to the heater before reaching an un-safe temperature condition.
HEATER ELEMENTS AND LIMIT SWITCHES' SPECIFICATIONS VPAK 9K, 12K and 18K BTUs Models: 2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%. Has 1 Limit Switch, Opens at 120° F, Closes at 90° F, It has a One Time Open Temp. of 145° F.
3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%. Has 1 Limit Switch, Opens at 120° F, Closes at 90° F, It has a One Time Open Temp. of 145° F.
5 KW, 230 V, Resistance 9.31 Ohms + - 5%. Has 1 Limit Switch, Opens at 130° F, Closes at 100° F, It has a One Time Open Temp. of 155° F. VPAK 24K BTUs Models:
2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%. Has 2 Limit Switches, Primary Opens at 155° F, Closes at 125° F, Secondary's Open Temp. is 200° F.
3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%. Has 2 Limit Switches, Primary Opens at 155° F, Closes at 125° F, Secondary's Open Temp. is 200° F.
5 KW, 230 V, Resistance 9.31 Ohms + - 5%. Has 2 Limit Switches, Primary Opens at 155° F, Closes at 125° F, Secondary's Open Temp. is 200° F.
7.5 KW, 230 V (composed of 2, 3.7 KW Elements) Each Has a Resistance of 12.41 Ohms + - 5%. Each Has 2 Limit Switches, Primary Opens at 165° F, Closes at 135° F With a 1 time Open Temp. of 210° F. Secondary Limit's Open Temp. is 200° F.
10 KW, 230 V (composed of 2, 5 KW Elements) Each Has a Resistance of 9.31 Ohms + - 5%. Each Has 2 Limit Switches, Primary Opens at 165° F, Closes at 135° F With a 1 time Open Temp. of 210° F. Secondary Limit's Open Temp. is 200° F.
NOTE: Always replace with an exact replacement. TESTING THE HEATING ELEMENT Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed. A cold resistance reading of approximately 14.5 ohms for the 3.3 KW heater, 11.9 ohms for the 4.0 KW heater and 9.15 ohms for the 5.2 KW heater should be registered.
48

COMPONENTS TESTING

WARNING
ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Bellows Assembly Drain Pan Valve

Failure to do so could result in serious injury or death.

Drain Pan Valve

During the cooling mode of operation, condensate which

collects in the drain pan is picked up by the con-denser fan blade and sprayed onto the condenser coil. This

Figure 709 Drain Pan Valve

assists in cooling the refrigerant plus evaporating the

water.

During the heating mode of operation, it is necessary that water be removed to prevent it from freezing during cold outside

temperatures. This could cause the con-denser fan blade to freeze in the accumulated water and prevent it from turning.

To provide a means of draining this water, a bellows type drain valve is installed over a drain opening in the base pan.

This valve is temperature sensitive and will open when the outside temperature reaches 40°F. The valve will close gradually as

the temperature rises above 40°F to fully close at 60°F.

To test the drain pan valve; 1) Place a pack of ice on the capillary 2) Ensure that the valve opens as it cools down. 3) remove the pack of ice. 4) Ensure that the valve closes fully as the valve warms back up.

COMPONENTS TESTING

Thermistor Resistence Values (This Table Applies to All Thermistors)

TEMP
F -25
-20 -15 -10 -5
0 5 10 15 20 25 30 31 32 33 34 35 36 37 38 39 40 45 50 55 60 65 66 67 68 69 70 71 72 73 74 75 76
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 105 110 115 120

RESISTENCE (K Ohms)

MIN 210.889 178.952 151.591 128.434 108.886 92.411 78.541 66.866 57.039 48.763 41.786
35.896 34.832 33.803 32.808 31.846 30.916 30.016 29.144 28.319 27.486 26.697 23.116 20.071 17.474 15.253 13.351 13.004 12.668 12.341 12.024 11.716 11.418 11.128 10.846 10.574 10.308 10.051
9.800 9.550 9.306 9.070 8.841 8.618 8.402 8.192 7.987 7.789 7.596 7.409 7.227 7.050 6.878 6.711 6.548 6.390 6.237 6.087 5.942 5.800 5.663 5.529 4.912 4.371 3.898 3.482

CENTR 225.548 190.889 161.325 136.363 115.340 97.662 82.812
70.339 59.864 51.060 43.654 37.415 36.290 35.202 34.150 33.133 32.151 31.200 30.281 29.425 28.532 27.701 23.931 20.731 18.008 15.684 13.697 13.335 12.984 12.644 12.313 11.993 11.682 11.380 11.088 10.804 10.528 10.260
10.000 9.748 9.503 9.265 9.033 8.809 8.591 8.379 8.172 7.972 7.778 7.589 7.405 7.226 7.052 6.883 6.718 6.558 6.403 6.252 6.105 5.961 5.822 5.686 5.060 4.511 4.030 3.606

MAX 240.224 202.825 171.059 144.292 121.794 102.912
87.083 73.812 62.688 53.357 45.523 38.934 37.747 36.601 35.492 34.421 33.386 32.385 31.418 30.534 29.579 28.704 24.745 21.391 18.542 16.115 14.043 13.666 13.301 12.947 12.603 12.269 11.946 11.633 11.329 11.034 10.748 10.469
10.200 9.945 9.699 9.459 9.226 9.000 8.780 8.566 8.358 8.155 7.959 7.768 7.583 7.402 7.226 7.055 6.889 6.727 6.569 6.417 6.268 6.122 5.981 5.844 5.208 4.651 4.161 3.730

RESISTANCE

TOLERANCE %

MIN

MAX

6.50

6.51

6.25

6.03

5.81

5.60

5.38

5.16

4.94

4.72

4.50

4.28

4.06

4.02

3.97

3.93

3.89

3.84

3.80

3.75

3.76

3.77

3.67

3.62

3.40

3.18

2.96

2.75

2.53

2.48

2.44

2.39

2.35

2.31

2.26

2.22

2.18

2.13

2.09

2.04

2.00

2.03

2.07

2.10

2.13

2.17

2.20

2.23

2.27

2.30

2.33

2.37

2.40

2.43

2.47

2.50

2.53

2.57

2.60

2.63

2.67

2.70

2.73

2.77

2.93

3.10

3.27

3.43

Figure 710 Thermistor Values 50

COMPONENTS TESTING
Testing the Diagnostic Service Module
Testing the Electronic Control Board

WARNING
ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.
Failure to do so could result in serious injury or death.
If the Diagnostic Service Module does not turn on: 1. Make sure there is 208/230 VAC to the unit and that it is turned on. 2. Disconnect the diagnostic service module's wire harness on the control board. 3. Using a voltmeter, check the fi rst two pins to the left of the female connector (see picture below). There should be up to 5VDC. 4. If there is no voltage, replace the electronic control board. 5. If there is voltage, check the wire harness and connections at the electronic control board and the diagnostic service module. 6. IF THE CONNECTIONS AND THE WIRE HARNESS ARE GOOD, REPLACE THE DIAGNOSTIC SERVICE MODULE.

DIAGNOSTIC SERVICE MODULE

SERVICE MODULE CONNECTOR

TEST HERE UP TO 5VDC. IF NO VOLTAGE, REPLACE BOARD. IF THERE IS 5VDC, CHECK CONNECTIONS AND CABLE. IF OK, REPLACE SERVICE MODULE.
51

COMPONENT TESTING

ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION AND TESTING

Front

VPAK 24K

Back

High Pressure Switch

Reversing Valve Not Used

Not Used

Not Used High Speed Not Used Low Speed
Diagnostic Servicer Module Not Used T-stat Terminals

Not Used
Transformer 115/230 Volts

(Blue) (Green)

Transformer voltage Selector Switch 115/230 Volts Ensure it is set at 230VAC

Fuse 10 Amps 250 VAC

1. Test for power at L1 and L2 for 208/230 VAC. (Ensure the transformer voltage selector switch is set for 230 VAC) 2. TEST THE 10 AMP/250 VAC FUSE FOR CONTINUITY.

FOR THE FOLLOWING TESTS, ENSURE THE UNIT IS IN THE APPROPRIATE SETTINGS FOR THE TEST BEING PERFORMED. ENSURE THERE ARE NO ERROR CODES ACTIVE.

3. Testing the compressor relay and heat relays: Test for power in and power out. If there is power in and no power out, replace the electronic control board.(208/230 to L2) 4. Testing the fan and reversing valve relays: Test for power at the reversing valve and fan relays 1 or 3. (208/230 to L2) 5. Testing the transformer: Test the low voltage terminal strip at: R and C for 24 VAC F2 and F1 for 24 VAC D2 and D1 for 24 VAC Test the service module connector for 5 VDC (see prior page) Test the connectors for the thermistors for up to 5 VDC If there is no voltage at any of the above, replace electronic control board. 6. Testing the thermistors: Disconnect the thermistor and test for resistance value (see page 35) 7. Testing the high pressure switch (VPAK 24K only) Test for 24 VAC at board, if there is no voltage, replace the electronic control. Test the pressure switch for continuity, if none, replace it (switch is normally closed)

TROUBLESHOOTING
Error Codes and Alarm Status
Unit control panel The display shown below has four digits. The left two digits indicate the error code # ( 1 to 24 ), the on/off icons above these Two digits ; The Diaplay contains a maintenace icon (Wrench) that will illuminate to indicate when that unit needs service. The wrench indicates an error code is active. Check all error codes to identify the specific code that is on.

CHECK ERROR CODES

Press the Enter key to activate the display.

Each press of the scroll key display the next error code.

Clear History Counters

Press & hold the Enter key and the Scroll Key for 6 seconds.

TROUBLESHOOTING
Error Codes and Alarm Status

DIAG CODE
1 2 3 4
5

PROBLEM
Front Panel Button Stuck For More Than 20 Seconds Input Voltage Out of Specification (187 253) Indoor Temperature Sensor is Open or Shorted Indoor Coil Temperature Sensor is Open or Shorted
Outdoor Coil Temperature Sensor is Open or Shorted

CONTROL BOARD'S ACTION
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input.
Unit stops, open all relays until voltage is back within specs then resume operation.
Unit defaults to 75°F in COOLING or 68°F in HEATING and will continue to operate if setting is below 75°F in cool mode or if above 68°F in heat mode.
The unit's control board defaults to 40°F. It will override the sensor and the unit will continue to operate.
The unit defaults to 20°F, overriding the sensor. The unit will continue to operate. Using Elec Heat if available for HEATING. If not available, it will use HEAT PUMP if the outdoor temperature allows.

6 Outdoor Coil > (grater than) 175 F

The unit will shut down for 5 minutes. resume operation for 3 minutes. If test fails 3 times, the unit operation is locked out. See troubleshooting page 42. To reset, turn power off and on.

7 Indoor Coil < (less than) 30 F for 2 consecutive minutes

The compressor will turn off and the High Fan speed will run. When coil temp reachs 45°F the unit will resume operation after lockout time.

8 Unit Cycles > (greater than) 9 Times per The unit will continue to operate and be monitored. hour

9 Unit Cycles < (less than) 3 Times per Hour The unit will continue to operate and be monitored.

11 WallStat Problem or Connection Issue

The unit will not operate.

13 VPAK 24K Unit Only High Pressure Limit Switch is Open

If unit is cooling or heat pump is on, shut down compressor. Run high fan until switch closes, then resume operation. The third occurance in 1 hour locks unit out. Applicable to 24K unit only. To reset, turn power off and on.

15 Heat Pump Error

If indoor coil temperature is less than ambient temperature for 3 minutes, the unit will use electric heat to satisfy the heating demand. Causes could be bad reversing valve, heat load too high.

16 Temperature beyond operating limits

Occurs if the indoor ambient temperature range falls below 0°F or greater than 130°F. The error code will remain on until the temperature reaches the operating range and then the unit will return to normal operation.

17 Equipment Doesn't Meet Minimum Configuration

The compressor must be enabled and have at least 2 fan speeds.

22 (Not an error code) Outdoor Coil Temperature < 30 F for 2 consecutive minutes

Unit will use electric heat to satisfy heating demands until the temperature equals or exceeds 45°F. Applicable for Heat Pump models only.

TROUBLESHOOTING

Electrical TroubleshootingChart- Cooling

9K Btu, 12K Btu, & 18K Btu

TROUBLESHOOTING
Electrical TroubleshootingChart- Cooling
24K Btu

TROUBLESHOOTING
Electrical Troubleshooting Chart - Heat Pump

TROUBLESHOOTING
Troubleshooting Chart - Cooling

9-18K VEA 208/230V

HERM S
Figure 801 (80061802) 59

WASHER TEMINAL COVER
GASKET

NUT
STUD INSOLATOR

TERMINAL DETAIL

OVERLOAD SPRING OLP

HARNESS COMPRESSOR COMPRESSOR

C " F"

FLAG TERMINAL COVER

(PLACE ON TERMINAL IN CONTACT WITH WIRE)

SEALER
(SEALER MUST BE A HALF OF A BAR UNDER THE CAP SURROUND THE COMPR HARNESS AND
A HALF ON THE TOP COVERING THE COMPR NUT)

RED

QUICK DISCONNECT
150

R
BLUE BLAC K W HITE

4770B SEQ125 DISPLAY SERVICE

C
FAN
CAPACITOR
FUSE HOLDER FUSE

WHITE BROWN

GREEN MOTOR

TO MOTOR MOUNT

040

BLUE

BLACK

WIRING DIAGRAMS

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 230V

BLACK

(TO L1)

(TO L2)

W H IT E

* *

* ** *

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

INDOOR COIL SENSOR

OUTDOOR COIL SENSOR
L2 or ACN L1

ELECTRONIC CONTROL

RED 535 ORANGE 530

JUMPER WIRE

HEATER 2.5 KW & 3.5 KW
5.0 KW

TO DISPLAY
AMBIENT AIR SENSOR POU 4470B SEQ 122

WASHER TEMINAL COVER
GASKET

NUT

SEALER

TERMINAL DETAIL

STUD INSOLATOR
OVERLOAD
SPRING OLP

LABEL WARNING
COMP

HERM S

COMPRESSOR
4770A (REF)
C "F"

FLAG TERMINAL COVER
(PLACE ON TERMINAL IN CONTACT WITH WIRE)

BLUE

RED

HARNESS COMPRESSOR

CAPACITOR

WHITE

C FAN

WHITE BROWN

BLACK

GREEN TO MOTOR MOUNT
MOTOR

Sealer
THE COMPR HARNESS AND A HALF ON THE TOP COVERING THE COMPR NUT)

QUICK DISCONNECT

FUSE HOLDER FUSE

BLACK

COIL SOLENOID

BLUE

Figure 802 (80062104) 60

BLACK BLACK BLACK

WIRING DIAGRAMS

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 230V

BLACK (TO L1)

* ** * *

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

WHITE (TO L2)

* *
L1

L2 or ACN

INDOOR COIL SENSOR

OUTDOOR COIL SENSOR
ELECTRONIC CONTROL

RED ORANGE
JUMPER WIRE

HEATER 2.5 KW & 3.5 KW
5.0 KW

TO DISPLAY
AMBIENT AIR SENSOR

9-18K VHA 208/230V

Figure 803 (80062105) 61

SERVICE DISPLAY

265V 60Hz
2 2 WIRES FLA MCA MOP

QUICK DISCONNECT

BLACK
IN 265VAC OUT 230VAC 170 TRANSFORMER

WHITE BROWN

WHITE

HARNESS COMPRESSOR

FLAG TERMINAL COVER

S " F"

(PLACE ON TERMINAL IN CONTACT WITH WIRE)

HERM C

BLAC K

BLUE RED
BLACK RED

W HITE

FAN CAPACITOR

RED
ORANGE RELAY

BLUE

BLACK
WHITE BROWN

BLACK
RED BLACK

TO DISPLAY
AMBIENT AIR SENSOR POU 4770B SEQ 122

FUSE

FUSE BLOCK

FUSE

BUILDING GROUND
GROUND TO CHASIS

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 220V / 230V

SEALER
(SEALER MUST BE 1/2 OF A BAR UNDER THE CAP, ROUNDING THE COMPR HARNESS AND 1/2 ON THE TOP COVERING THE COMPR NUT)

FUSE HOLDER FUSE

WHITE

BLACK

WHITE BLACK

** * *

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

L1
**

L2 or ACN
ELECTRONIC CONTROL

WASHER TEMINAL COVER

NUT

STUD

INSOLATOR

OVERLOAD

GASKET

SPRING OLP

TERMINAL DETAIL
COMPRESSOR

BLACK BLACK

GREEN

TO MOTOR MOUNT

MOTOR

HEATER 2.5 KW & 3.5 KW
5.0 KW

COIL SOLENOID

JUMPER WIRE
OUTDOOR COIL SENSOR INDOOR COIL SENSOR

9-18K VHA 265V

WIRING DIAGRAMS

WIRING DIAGRAMS
24K VEA 208/230V 2.5/3.4/5.0
FAN
S
FAN
Figure 804 (80127302) 62

TEMINAL COVER
GASKET

NUT
SLR TAPE BUTYL
TERM STUD INSULATOR

COMPRESSOR
4770A (REF)
C "F"

FLAG COVER
(PLACE COVER ON TERMINAL IN CONTACT WITH WIRE)

LABEL WARNING
COMP

HARNESS COMPRESSOR

SEALER -SEE DETAIL A-

TERMINAL DETAIL
RED

WHITE

C
CAPACITOR

BLUE BLACK

WHITE
TO MOTOR MOUNT

OUTDOOR FAN MOTOR

GREEN

HERM

FUSE FUSE HOLDER

BLACK
COMPRESSOR CONTACTOR

BLACK BLACK

WHITE
BROWN
QUICK DISCONNECT

- DETAIL A -
SEALER
(SEALER MUST BE A HALF OF A BAR UNDER THE CAP SURROUND THE COMPR HARNESS AND A HALF ON THE TOP COVERING THE COMPR NUT)

CAPACITOR
C
HERM
INDOOR BLOWER MOTOR

DISPLAY SERVICE
PROVISIONING MSTR TABLE
1

BROWN WHITE

(TO L1)

BLACK

BLUE BLACK

WHITE

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 230V

(TO L2)

RED

* **

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

WHITE

* *
L1

INDOOR COIL SENSOR 4770D SEQ 104

L2 or ACN

OUTDOOR COIL SENSOR 4770D SEQ 105

ELECTRONIC CONTROL

BROWN

RED

* BLUE
BLUE
*

PRESSURE SWITCH

GREEN

TO MOTOR MOUNT

HEATER 2.5 KW & 3.5 KW
5.0 KW

TO DISPLAY
AMBIENT AIR SENSOR (POU 4770D SEQ 103)

24K VEA 208/230V 7.5/10.0

FAN
S
FAN
Figure 805 (80127401) 63

TEMINAL COVER
GASKET

NUT
SLR TAPE BUTYL
TERM STUD INSULATOR

COMPRESSOR
C "F"

FLAG COVER
(PLACE COVER ON TERMINAL IN CONTACT WITH WIRE)

LABEL WARNING
COMP

HARNESS COMPRESSOR

SEALER -SEE DETAIL A-

TERMINAL DETAIL
RED

WHITE

C
CAPACITOR

BLUE BLACK

WHITE
TO MOTOR MOUNT

OUTDOOR FAN MOTOR

GREEN

HERM

FUSE FUSE HOLDER

BLACK
COMPRESSOR CONTACTOR

BLACK BLACK

WHITE
BROWN
QUICK DISCONNECT

- DETAIL A -
SEALER
(SEALER MUST BE A HALF OF A BAR UNDER THE CAP SURROUND THE COMPR HARNESS AND A HALF ON THE TOP COVERING THE COMPR NUT)

CAPACITOR
C
HERM
INDOOR BLOWER
MOTOR 040

DISPLAY SERVICE (POU 4770D SEQ 102) REF
PROVISIONING MSTR TABLE
1

BROWN WHITE

(TO L1)

WIRING DIAGRAMS

WHITE

WHITE 520 (TO L2)

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 230V

RED
**

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

*
L1

INDOOR COIL SENSOR

L2 or ACN

OUTDOOR COIL SENSOR

ELECTRONIC CONTROL

BLACK

BLUE BLACK
BLACK BLUE

GREEN

TO MOTOR MOUNT

RED BROWN

* BLUE
BLUE
*

HEATER 7.5 KW & 1.0 KW
PRESSURE SWITCH

TO DISPLAY
AMBIENT AIR SENSOR (POU 4770D SEQ 103)

WIRING DIAGRAMS
24K VHA 208/230V 2.5/3.4/5.0
FAN
FAN
Figure 806 (80126301) 64

WASHER NUT
TEMINAL COVER
GASKET

HARNESS COMPRESSOR

TERMINAL DETAIL
C
CAPACITOR

COMPRESSOR RED BLUE

HE R M
BLACK BLACK

COMPRESSOR CONTACTOR
BLACK

WHITE

TO MOTOR MOUNT

GREEN

WHITE QUICK DISCONNECT

FAN MOTOR

WHITE BROWN

COIL SOLENOID

C
HER M
CAPACITOR

WHITE BROWN
BLACK BLUE

BLACK BLACK

RED

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 220V
L1

WHITE

(TO L2)

WHITE BLACK

(TO L1)

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

RED BROWN
PRESSURE SWITCH

BLUE BLUE

L2 or ACN

INDOOR COIL SENSOR

OUTDOOR COIL SENSOR
ELECTRONIC CONTROL

HEATER 2.5 KW & 3.5 KW
5.0 KW

GREEN
BLOWER MOTOR

TO MOTOR MOUNT

TO DISPLAY
AMBIENT AIR SENSOR

FAN
Figure 807 (80126401) 65

WASHER NUT
TEMINAL COVER
GASKET

HARNESS COMPRESSOR

TERMINAL DETAIL
C
CAPACITOR

COMPRESSOR RED BLUE

HERM

BLACK BLACK

COMPRESSOR CONTACTOR
BLACK

WHITE

TO MOTOR MOUNT

GREEN

WHITE QUICK DISCONNECT

FAN MOTOR

WHITE BROWN

COIL SOLENOID

FAN

C
HERM
CAPACITOR

WHITE BROWN
BLACK BLUE

BLACK BLACK

RED 540

VOLTAGE SELECTION SWITCH SET VOLTAGE TO 220V

(TO L2)

02 WHITE

BLACK

(TO L1)

COMP RELAY

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

RED BROWN
PRESSURE SWITCH

BLACK BLUE

BLUE BLUE

WHITE

HEATER 7.5 KW & 10.0 KW

L2 or ACN

INDOOR COIL SENSOR

OUTDOOR COIL SENSOR

ELECTRONIC CONTROL

GREEN
BLOWER MOTOR

TO MOTOR MOUNT

TO DISPLAY
AMBIENT AIR SENSOR

24K VHA 208/230V 7.5/10

WIRING DIAGRAMS

24K VHA 265V 2.5/3.4/5.0

FAN
S FAN
Figure 808 (80126302) 66

QUICK DISCONNECT L1 L2
FUSE HO LDER
FUSE

W HITE

CAPACITOR C

HERM R

HARNESS COMPRESSOR
C " F"

WIRING DIAGRAM HEAT PUMP EH 5.0KW VHA24R

COMPRESSOR
4770A (REF)

RED BLUE

BLACK BLACK

GREEN
TO MOTOR MOUNT

FAN MOTOR

WASHER NUT
TEMINAL COVER
GASKET

TERMINAL DETAIL

WHITE

BROWN

HERM CAPACITOR

WHITE BROWN

BLOWER MOTOR

GREEN
TO MOTOR MOUNT

BRO WN

BLAC K RED

WIRING DIAGRAMS

TRANSFO RME R IN 265VAC O UT 230VAC

W HITE W H IT E
BLAC K W HITE

BLAC K

WHITE BLACK
COMPRESSOR CONTACTOR
RED
COMP RELAY

RED

HEATER RELAY

BLACK

RED BROWN
BLUE BLACK

HEAT RELAY
230

HEAT RELAY

FAN 1 FAN 2 FAN 3 FAN 4 RV RELAY RELAY RELAY RELAY RELAY

PRESSURE SWITCH

HEATER 5.0 KW
BLACK BLACK

COIL SOLENOID

BLUE BLUE
230

VOLTAGE SELECTION SWITCH

SET VOLTAGE TO 220V

L2 or ACN

INDOOR COIL SENSOR

OUTDOOR COIL SENSOR
ELECTRONIC CONTROL

TO DISPLAY
AMBIENT AIR SENSOR

24K VHA 265V 7.5/10.0

FAN
S
FAN
Figure 809 (80126402) 67

WIRING DIAGRAMS

RE D R
RED BLAC K

B LAC K RED BR OWN BLAC K WHIT E

BLACK
WHITE 507

WIR ING DIAG R AM C OOL, HE AT P UMP , E H, 265V
2.5, 3.4, 5.0 KW LAR G E C HAS S IS QUIC K DIS C ONNE C T
FUS E HOLDE R (4770D F US E
FUS E

S E ALE R DE TAIL C AP AC IT O R
C
W HIT E B LAC K

HER M

HAR NE S S C OMP R E S S OR

LABE L

WAR NING FLAG COVE R COMP

"F"

(PLAC E ON TE R MINAL

IN C ONTAC T WITH WIR E )

C OMP R E S S OR
4770A (R E F)

RED

OUTDOOR F AN MOTOR

BLUE

TE MINAL C OVE R
GAS KE T

NUT S LR TAPE BUTYL
TER M S TUD INS ULATOR

S E ALE R 600

TE R MINAL DE TAIL

(S E E PICTUR E )

W H IT E

C AP AC ITOR

INDOOR B LOWE R MO T O R

BLAC K BLAC K

GREEN
TO MOTOR MOUNT

HE ATE R R E LAY X 2

4770D *

WHITE C BR OWN
B LAC K

W HIT E BR OWN
HERM

BLUE

W H IT E

B LAC K

C OMP R E S S OR CONTAC TOR

RED BR OWN

HE ATE R 7.5 KW & 10.0 KW

S E R VIC E DIS P LAY POU 4770D S E Q 102
GREEN TO MOTOR MOUNT
PR OVIS IONING MS TR TAB LE
1

WHIT E WHIT E
W HIT E BLAC K

TR ANS F OR ME R IN= 265V OUT= 230V (4770D 183)

B LAC K

BLUE B LAC K

C OMP R E LAY

HE AT R E LAY

FAN 1 FAN 2 FAN 3 FAN 4 R V R E LAY R E LAY R E LAY R E LAY R E LAY
* *

BLUE BLUE

PR E SS UR E WITC H

BLAC K BLAC K

C OIL S OLE NOID

AMB IE NT AIR S E NS OR POU 4770D S E Q 103

* INDOOR C OIL S E NS OR
P OU 4770D S E Q 104
OUTDOOR C OIL S E NS OR 4770D S E Q 105
E LE CTR ONIC C ONTR OL

VOLTAGE S E LE CTION S WITC H S E T VOLTAGE TO 230V

PARTS CATALOG
VEA9K, VHA9K, VEA12K, VHA12K, VEA18K
1 2 3

Figure 901

5 4

PARTS CATALOG
VEA9K, VHA9K, VEA12K, VHA12K, VEA18K

Figure 901

12 13
14 15 16
17

18
22 21 20 19

PARTS CATALOG
VEA9K, VHA9K, VEA12K, VHA12K, VEA18K
27

Figure 901
28

PARTS CATALOG
VEA9K, VHA9K, VEA12K, VHA12K, VEA18K
30
31 33

Figure 901

34 35

PARTS CATALOG

VEA9K, VHA9K, VEA12K, VHA12K, VEA18K

ITEM PART

PART DESCRIPTION

NUMBER

1 80050634 BRACKET ELECT CTRL KUHL HEM

2 62600601 DISPLAY SERVICE VPAK GE

3 62601008 KIT E-CNTL SERV COOL VEA

3 62601009 KIT E-CNTL SERV COOL HP VHA

3 62600118 ASSY E-CNTRL COOL/EH AMP JMPR
4 60610616 WHEEL BLOWER TA0755

4 60610605 WHEEL BLOWER 9.10 X 4.000 5 60542004 FAN PLASTIC 14.5" TA1004 6 80015705 PANEL CONTROL BOX PREPNTD
6 80015706 PANEL CONTROL BOX PREPAINTED 18K265
7 80007600 NONFUSED DISCONNECT 8 80002100 BRACKET DISCONNECT 8 80118502 BRACKET FUSE HOLDER
9 61670803 TRANSFORMER IN 265V OUT 235V
10 61776111 FUSE BLOCK 3 POLES 30 AMP

USED ON MODEL
ALL
ALL
VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP
VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN, VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN, VHA18R50RTN
ALL
VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP, VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,
VEA18K25RTP, VEA18K34RTP, VEA18K50RTP
ALL
VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP, VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN,
VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,
ALL
ALL
VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN
VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN
VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

Figure 901
QTY 1 1 1
1
1 1
1 1 1
1 1 1 1 1 1

PARTS CATALOG

VEA9K, VHA9K, VHA12K, VEA12K, VEA18K

ITEM PART

PART DESCRIPTION

NUMBER

USED ON MODEL

10 21058443 FUSE HOLDER 20A HPF 13/32 X 1-1/2

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP, VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

10 61773319 FUSE 600V 15A CC TD

VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

10 61773317 FUSE 600V 20A CC TD

VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

10 61773323 FUSE 250V 20A 1.5X13/32 TIME ALL DELAY

11 61643311 RELAY 230V COIL DPDT 30A 208/240VAC

VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

12 80043209 ASSY VALVE REVERSING

VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R34RTN, VHA09R50RTN, VHA12K25RTN,

12 80043211 ASSY VALVE REVERSING

VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,

13 80109305 ASSY CHECK VALVE

VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN,

13 80042919 ASSY VALVE CHECK & CAPLRY

VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,

14 61718146 KIT COMPR REPLMT 62200507

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VHA09K25RTN, VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP

14 61718125 KIT COMPR RPLMNT 62200313

VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP

14 80074938 KIT COMPR REPLMT 62200503 VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

15 91400402 STUD COMPR MTG

ALL

16 61028904 GROMMET COMPR LOW DENSITY ALL

17 80023703 BASEPAN VPAK

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP

17 80023702 BASEPAN VPAK

VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN, VEA12K25RTP, VEA12K34RTP, VEA12K34RTP, VEA18K25RTL, VEA18K34RTL, VEA18K50RTL, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

18 03760451 TUBE CAP .049 IDX.099ODX19.5" VHA09K25RTN , VHA09K34RTN, VHA09K50RTN,

RED

VHA09R25RTN, VHA09R34RTN, VHA09R50RTN

18 73

03760548

TUBE CAP .054 X.106OD X 39.25 WHITE

VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

Figure 901
QTY 1
2 1 1 1 1 1 1 1 11
1
1 3 3 1
1
1 1

PARTS CATALOG

VEA9K, VHA9K, VEA12K, VHA12K, VEA18K

ITEM 18

PART NUMBER
03760573

18 03760574

18 01390212

18 03760513

18 01389915

19 80050200 20 80006870

21 60179904 22 61776900 24 80013809 25 61814800 26 80049601 27 80001800 28 80013503

29 80013808 30 80019001 31 61080538

31 61080558

31 61080554 32 80041761

32 80048150 33 80017090

PART DESCRIPTION

USED ON MODEL

TUBE CAPLRY .042"IDX.087X30" VEA09K25RTN, VEA09K34RTN, VEA09K50RTN,

REDWHITE

VEA09K25RTP, VEA09K34RTP, VEA09K50RTP

TUBE CAPLRY .046"ID X.097"X25" VEA12K25RTN, VEA12K34RTN, VEA12K50RTN,

ALUM

VEA12K25RTP, VEA12K34RTP, VEA12K34RTP

TUBE CAP .059 ID X.112 OD X 37 VHA12K25RTN, VHA12K34RTN, VHA12K50RTN,

BLUE

VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,

TUBE CAP .049 X .099 OD X 30 RED

VHA09K25RTN , VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN

TUBE CAP .059 X.112 OD X 20.4 BLUE

VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

MOTOR RISER FOR WELLING

ALL

MTR 1/4 4 GP CCW 2 PSC 10.0

ALL

WELLING

CONDENSATE DRAIN VALVE

ALL

MOTOR MOUNT XQ

ALL

ASSY INSUL LEFT SIDE PANEL ALL

CONNECTOR FRESH AIR S/M

ALL

ASSY PANEL UFRONT INSUL

ALL

COLLAR 24 GA

ALL

ASSY INSULATION TOP COVER ALL PREPAI

ASSY INSUL RIGHT SIDE PANEL ALL

ASSY INNERWALL INSUL

ALL

CAPCTR 25/10 MF 370V 2.0

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VHA09K25RTN , VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN,

CAPCTR 30/10 MF 370V 2.0

VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,

CAPCTR 40/10MF 370V 2.0

VEA18K25RTP, VEA18K34RTP, VEA18K50RTP,

EVAPORATOR COIL VES.312X4X16XU9V45A18X13H

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP, VHA09K25RTN , VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN,

EVAPORATOR COIL

VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

VES.375X3X18RC2V45A18X13H6

HEATER VPAK-A NXT 2.5KW 230V VEA09K25RTP, VEA09K25RTN,VHA09K25RTN, VHA12R25RTN, VEA12K25RTN, VEA12K25RTP, VHA12K25RTN, VHA12R25RTN, VEA18K25RTP

Figure 901
QTY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1
1 1
1 1

PARTS CATALOG

VEA9K, VHA9K, VEA12K, VHA12K, VEA18K, VHA18K

ITEM PART

PART DESCRIPTION

NUMBER

USED ON MODEL

33 80017091 HEATER VPAK-A NXT 3.4KW 230V VEA09K34RTN, VEA09K34RTP, VHA09K34RTN, VHA12R34RTN, VEA12K34RTN, VEA12K34RTP, VHA12K34RTN, VHA12R34RTN, VEA18K34RTP

33 80017092 HEATER VPAK-A NXT 5.0KW 230V VEA09K50RTN, EA09K50RTP, VHA09K50RTN, VHA12R50RTN, VEA12K50RTN, VEA12K50RTP, VHA12K50RTN, VHA12R50RTN, VEA18K50RTP

33 80017102 HEATER VPAK-A NXT 2.5KW 265V VHA09R25RTN, VHA12R25RTN

33 80017101 HEATER VPAK-A NXT 3.4KW 265V VHA09R34RTN, VHA12R34RTN

33 80017100 HEATER VPAK-A NXT 5.0KW 265V VHA09R50RTN, VHA12R50RTN

34 80101265 CONDENSER COIL VCS .250X4X16XC9K45A17X15H3

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VHA09K25RTN ,VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN, VEA09K25RTP, VEA09K34RTP, VEA09K50RTP

34 80101266 CONDENSER COIL VCS .250X4X16XC9K45A17X15H3

VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA12K25RTP, VEA12K34RTP, VEA12K50RTP

34 80048050 CONDENSER COIL VCS .375X3X18RC2V45B 19X17H3

VEA18K25RTL, VEA18K34RTL, VEA18K50RTL, VEA18K25RTP, VEA18K34RTP, VEA18K50RTP

35 61804901 SHROUD MED W/FD RESTRAINT ALL

-36 21058443 FUSE HOLDER 20A HPF 13/32 X ALL 1-1/2

-37 61773323 FUSE 250V 20A 1.5X13/32 TIME ALL DELAY

-38 61764607 OLP B180-140B-241C 60343539

VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VEA09K25RTN, VEA09K34RTN, VEA09K50RTN, VHA09K25RTN, VHA09K34RTN, VHA09K50RTN, VHA09R25RTN, VHA09R34RTN, VHA09R50RTN,

-39 61764613 OLP B245-140B-141 H FSTB

VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VEA12K25RTN, VEA12K34RTN, VEA12K50RTN, VHA12K25RTN, VHA12K34RTN, VHA12K50RTN, VHA12R25RTN, VHA12R34RTN, VHA12R50RTN

-40 62600203 SENSOR ID RIA TEMPERATURE ALL (WHITE

-41 62600205 SENSOR ID COIL TEMPERATURE ALL (GREEN)

-42 62600206 SENSOR OD COIL TEMPERATURE ALL (BLUE)

-ITEMS ARE NON- ILLUSTRATED *ITEMS ARE NON-STOCKED, WILL NORMALLY REQUIRE 2-3 WEEKS LEAD TIME

Figure 901
QTY 1 1 1 1 1 1
1 1 1 1
1
1
1 1 1

PARTS CATALOG
VHA18K, VEA24K, VHA24K

Figure 902

2 1
3
76

PARTS CATALOG
VHA18K, VEA24K, VHA24K
4

Figure 902
12

5 11
10

PARTS CATALOG
VHA18K, VEA24K, VHA24K
13

Figure 902
27 26
25

14 15

24 23 22 21

PARTS CATALOG
VHA18K, VEA24K, VHA24K

Figure 902
33

28 29

32 31 30
39
13

28 38
37 34
30
36 32 35 13
79

PARTS CATALOG

VHA18K, VEA24K, VHA24K

ITEM PART

PART DESCRIPTION

NUMBER

1 80106401 ASSY RIGHT PANEL INSUL PREPNTD

-1A 80106501 ASY LEFT PANEL INSUL PREPNTD

2 61814801 CONNECTOR FRESH AIR LRG

3 80106601 ASSY REAR PANEL INSUL PREPNTD

4 80106201 ASSY INNERWALL INSULATION

5 80101300 LOWER LEFT POST

-5A 80101500 UPPER LEFT POST

6 80101261 COIL, CONDENSOR VCS.312X4X14RC2V45A20X19H6

6 80101260 COIL, CONDENSOR VCS.312X5X14RC2E45A20X19H6

7 80109305 ASSY CHECK VALVE 7 80109302 ASSY CHECK VALVE

8 91400402 STUD COMPR MTG 9 01150941 GROMMET COMP HI DENSITY 10 61718132 KIT COMPR REPLMT 62200316
10 80077118 REPLMT COMP KIT PA200M2CS3MUU GMC

11 03760511 TUBE CAP .059X.112OD X 23.25 BLUE
11 03760548 TUBE CAP .054 X.106OD X 39.25 WHITE

11 03760501 TUBE CAP .064 X .125 OD X 30.25 YEL
11 03760507 TUBE CAP .064X.125OD X 13.75 YELLOW
12 62050004 COIL, EVAPORATOR LES.375X4X14RC2V45A20X14H6

USED ON MODEL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN
VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN
VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
ALL
ALL
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN
VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN
VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24K75RTP, VHA24K25RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN
VHA24K25RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN

Figure 902
QTY 1 1 1 1 1 1 1 1 1
1 1
3 3 1 1
1 1
1 1
1

PARTS CATALOG

VHA18K, VEA24K, VHA24K

ITEM PART

PART DESCRIPTION

NUMBER

USED ON MODEL

12 80103450 COIL, EVAPORATOR

VEA24K10RTP, VEA24K25RTP, VEA24K34RTP,

VES.375X4X12RC2W45A20X14H6 VEA24K50RTP, VEA24L75RTP, VHA24K10RTN,

VHA24K25RTN, VHA24K34RTN, VHA24K50RTN,

VHA24K75RTN, VHA24R10RTN, VHA24R25RTN,

VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

13 80007600 NONFUSED DISCONNECT

ALL

14 80102290 HEATER VPAK-A24 NXT 2.5KW 230V

VHA18K25RTN, VEA24K25RTP, VHA24K25RTN

14 80102291 HEATER VPAK-A24 NXT 3.4KW 230V

VHA18K34RTN, VEA24K34RTP, VHA24K34RTN

14 80102292 HEATER VPAK-A24 NXT 5.0KW 230V

VHA18K50RTN, VEA24K50RTP, VHA24K50RTN

14 80102293 HEATER VPAK-A24 NXT 7.5KW 230V

VEA24K75RTP, VHA24K75RTN

14 80102295 HEATER VPAK-A NXT 2.5KW 265V VHA18R25RTN, VEA24R25RTP, VHA24R25RTN

14 80102296 HEATER VPAK-A NXT 3.4KW 265V VHA18R34RTN, VEA24R34RTP, VHA24R34RTN

14 80102297 HEATER VPAK-A NXT 5.0KW 265V VHA18R50RTN, VEA24R50RTP, VHA24R50RTN

14 80102298 HEATER VPAK-A24 NXT 7.5KW 265V

VHA24R75RTN

14 80102294 HEATER VPAK-A24 NXT 10.0KW VEA24K10RTP, VHA24K10KRTN 230V

14 80102299 HEATER VPAK-A24 NXT 10.0KW VHA24R10RTN 265V

15 80109908 ASSY REVERSING VALVE

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN

15 80109905 ASSY REVERSING VALVE

VHA24K10RTN, VHA24R\K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN

-15A 25063605 COIL SOLENOID 208/230VAC DUNAN

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN,VHA24K10RTN, VHA24R\K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN

16 25014400 MOTOR MOUNT

ALL

17 80102171 MTR 1/4 6P CCW 1 PSC 5.0 BLOWER WHEEL

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN

17 80102170 MTR 1/4 4 6P CCW 1PSC 5.0 BLOWER WHEEL

VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

18 60542007 FAN PLASTIC 16" LRG; VPAC

ALL

19 80101010 SHROUD RING VPAK 24

ALL

20 80114101 SHROUD ASY, VPAK LARGE

ALL

Figure 902
QTY 1
1 1 1 1 1 1 1 1 1 1 1 1 1
1
1 1 1
1 1 1

PARTS CATALOG

VHA18K, VEA24K, VHA24K

ITEM PART

PART DESCRIPTION

NUMBER

USED ON MODEL

21 80101400 LOWER RIGHT POST

ALL

-21A 80101600 UPPER RIGHT POST

ALL

22 80103200 BLOWER HOUSING

ALL

23 80106702 ASY TOP PANEL INSUL

ALL

PREPNTD

24 61080530 CAPCTR 40/5/ MF 370V 2.0

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN

24 61080580 CAPCTR 50/5/370VAC 2.0

VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

-24A 61080525 CAPCTR 25/3.0 MF 370V 2.0

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN

-24A 61080573 CAPCTR 15/5 MF 440V 2.0

VEA24K10RTP , VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

25 20709185 CLAMP, CAPACITOR

ALL

26 80113200 TOP COVER INSUL ASSY

ALL

27 80001800 COLLAR 24 GA

ALL

28 62600118 ASSY E-CNTRL COOL/EH AMP ALL JMPR

29 80118400 ASSY CONTROL BOX WELD VPAK ALL 24

30 62600601 DISPLAY SERVICE VPAC KUHL ALL

31 80116905 BRACKET ELECT CNTRL KUHL VEA24K10RTP , VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

32 80118601 CONTACTOR 240VAC HCL-

ALL

1NU01AAC

33 80116602 CONTROL BOX LID PREPNTD

VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VEA24K10RTP , VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24L75RTP, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN,

33 80116603 CONTROL BOX LID PREPNTD

VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

34 61670803 TRANSFORMER IN 265V OUT 235V

VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN

Figure 902
QTY 1 1 1 1 1 1
1 1
2 1 1 1 1 1 1
1 1
1
1

PARTS CATALOG

VHA18K, VEA24K, VHA24K

ITEM 35
-35A
-35B
36 37 38 39 -40 -41 -42 -43
-44 -40 -41 -42 83

PART NUMBER 61776111
61773319
61773317
61643311 80116906 80118401 80116603 21058443 61773323 62601008 62601009
61656200 62600203 62600205 62600206

PART DESCRIPTION FUSE BLOCK 3 POLES 30 AMP
FUSE 600V 15A CC TD
FUSE 600V 20A CC TD
RELAY 230V COIL DPDT 30A 208/240VAC BRACKET ELECT CNTRL 24R
ASSY CONTROL BOX WELD VPAK24R CONTROL BOX LID PREPNTD
FUSE HOLDER 20A HPF 13/32 X 1-1/2 FUSE 250VAC 10A 1.5X13/32 TD FNM-10 KIT E-CNTL SERV COOL VEA KIT E-CNTL SERV COOL HP VHA
CHANNEL EXHAUST DOOR SENSOR ID RIA TEMPERATURE (WHITE SENSOR ID COIL TEMPERATURE (GREEN) SENSOR OD COIL TEMPERATURE (BLUE)

USED ON MODEL
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24K10RTN, VHA24R\K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24K10RTN, VHA24R\K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN,VHA24K10RTN, VHA24R\K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN
VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN
ALL
ALL
VEA24K10RTP, VEA24K25RTP, VEA24K34RTP, VEA24K50RTP, VEA24K75RTP,
VHA18K25RTN, VHA18K34RTN, VHA18K50RTN, VHA18R25RTN, VHA18R34RTN , VHA18R50RTN, VHA24K10RTN, VHA24K25RTN, VHA24K34RTN, VHA24K50RTN, VHA24K75RTN, VHA24R10RTN, VHA24R25RTN, VHA24R34RTN, VHA24R50RTN, VHA24R75RTN.
ALL
ALL
ALL
ALL

Figure 902
QTY 1
2
1
1 1 1 1 1 1 1 1
1 1 1 1

PARTS CATALOG

VHA18K, VEA24K, VHA24K

ITEM PART

PART DESCRIPTION

NUMBER

USED ON MODEL

-45 61656201 SLIDE EXHAUST DOOR

ALL

-46 60179904 DRAIN VALVE

ALL

-47 80115225 ASSY BASEPAN DRAIN

ALL

-ITEMS ARE NON- ILLUSTRATED *ITEMS ARE NON-STOCKED, WILL NORMALLY REQUIRE 2-3 WEEKS LEAD TIME

Figure 902
QTY
1 1 1

AVAILABLE ACCESSORIES

ARCHITECTURAL LOUVER VPAL2 and VPSC2 Extruded aluminum grille that attaches to the outdoor section of the wall plenum. Takes in fresh air and returns condensed air. VPSC2 can be ordered in custom colors.
DIMENSIONS: 25 9/16" W x 31 1/16" H

WALL PLENUM (Required) VPAWP1-8, VPAWP1-14 Two-part sleeve that telescopes in and out; sits inside the exterior wall penetration.
VPAWP1-8 telescopes from 5 1/2" 8" VPAWP1-14 telescopes from 8 " 14"
DIMENSIONS : 24 1/8" W x 30 3/8" H CUTOUT DIMENSIONS: 24 5/8" W x 30 7/8" H

VPAL2

RETURN AIR GRILLE/ACCESS PANEL VPRG4/ VPRG4R

VPAWP1-8

be mounted with return air openings high or low on the door for optimum sound attenuation.
DIMENSIONS: 29" W x 58 " H CUTOUT DIMENSIONS: 27" W x 55 3/4" H

FIRST COMPANY SLEEVE ADAPTER
VPASA1 ® SPXR-
series single package vertical unit wall sleeve and louver. Easily connects to Friedrich chassis. Only compatible with Friedrich's smaller sized VPAK 9k and 12k units.

SINGLE STAGE THERMOSTATS RT6P, RT7P Wired, single stage, wall-mounted programmable thermostat has two fan speeds and backlight.
RT6, RT7 Wired, single stage, wall-mounted digital thermostat has two fan speeds and backlight.
WRT1 Wireless, single stage, wall-mounted digital thermostat has two fan speeds and backlight.

ENERGY MANAGEMENT THERMOSTATS

EMRT1, EMRT2 Wired thermostat has occupancy sensor.

EMWRT1, EMWRT2 Wireless thermostat has occupancy sensor.

EMOCT

EMRAF

Online connection kit. Remote access fee.

EMRHCF Remote humidity control fee.

DRAIN PAN (Required for large chassis models)
VPDP1 For VHA18 and VHA24 models. May be installed prior to chassis for easy installation/removal.

RT6, RT6P EMRT1, EMWRT1

VPRG4/ VPRG4R
VPASA1
WRT1 EMRT2, EMWRT2
VPDP1

AVAILABLE ACCESSORIES
Thermostat - Rt6
· 1-Stage Heat/1-Stage Cool Systems · Configurable to: 2-stage heat pump · Large Display With Backlight · Selectable Fahrenheit or Celsius

Installation, Operation & Application Guide

Parts Diagram

RESET CONFIG

R C GL GH O/B Y W

Reset switch

Configuration switch

Lo/Hi fan switch

Icon Descriptions

Fan operation icon
COOL
Cooling operation icon

Heating operation icon

HEAT

Heat set point when blinking

Cool set point when blinking

Up button Down button
Right (fan) button Left (system) button
Room temperature o set activated

AVAILABLE ACCESSORIES
Thermostat - Rt6
Specifications
Electrical rating: · 24 VAC (18-30 VAC) · 1 amp maximum per terminal · 3 amp maximum total load Temperature control range: 45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C) System configurations: 2-stage heat, 1-stage cool, heat pump, electric Timing: Anti-short cycle: 4 minutes (bypass anti-short cycle delay by returning to OFF mode
for 5 seconds) Backlight Operation: 10 seconds Terminations: R, C, GL, GH, O/B, Y, W

Important Safety Information
WARNING! : Always turn o power at the main power supply before installing, cleaning, or removing thermostat.
· This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC · All wiring must conform to local and national electrical and building codes · Do not use air conditioning when the outdoor temperature is below 50 degrees; this can damage
your A/C system and cause personal injuries · Use this thermostat only as described in this manual

Package Contents/Tools Required
Package includes: RT6 thermostat on base, thermostat cover, wiring labels, screws and wall anchors, Installation, Operation and Application Guide
Tools required for installation: Drill with 3/16" bit, hammer, screwdriver

To Remove Existing Thermostat

ELECTRICAL SHOCK HAZARD

Turn o power at the main service panel by removing

the fuse or switching the appropriate circuit breaker to the OFF position before

removing the existing thermostat.

1. Turn o power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker o .

2. Remove cover of old thermostat. This should expose the wires.

3. Label the existing wires with the enclosed wire labels before removing wires.

4. After labeling wires, remove wires from wire terminals.

5. Remove existing thermostat base from wall.

6. Refer to the following section for instructions on how to install this thermostat.

AVAILABLE ACCESSORIES

Thermostat - Rt6

To Install Thermostat

ELECTRICAL SHOCK HAZARD

Turn o power at the main service panel by removing

the fuse or switching the appropriate circuit breaker to the OFF position before

removing the existing thermostat.

IMPORTANT: Thermostat installation must conform to local and national building and electrical codes and ordinances.

Note: Mount the thermostat about five feet above the floor. Do not mount the thermostat on an outside wall, in direct sunlight, behind a door, or in an area a ected by a vent or duct.

1. Turn o power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker o .

2. To remove cover, pull gently at the seam at the top.

3. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through the wire opening in the base of the thermostat).

4. Mark the placement of the mounting holes.

5. Set thermostat base and cover away from working area.

6. Using a 3/16" drill bit, drill holes in the places you have marked for mounting.

7. Use a hammer to tap supplied anchors in mounting holes.

8. Align thermostat base with mounting holes and feed the control wires through slit in thermal intrusion barrier and into wire opening.

9. Use supplied screws to mount thermostat base to wall.

10. Insert stripped, labeled wires in matching wire terminals.

CAUTION!: Be sure exposed portion of wires does not touch other wires.

11. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the proper terminal.

12. Turn on power to the system at the main service panel.

13. Configure thermostat to match the type of system you have.

14. Replace cover on thermostat by snapping it in place.

15. Test thermostat operation as described in "Testing the Thermostat".

Wiring Diagrams

Heat/Cool Systems

Heat pump with electric backup

Transformer

120 VAC

24 VAC

R C

120 VAC

24 VAC

R C

Low Fan

High Fan

O/B

Cool

Compressor

Heat

Auxiliary Heat

Terminal Designator Descriptions
R 24 VAC hot C 24 VAC common O/B Configurable
O Cool active reversing valve B Heat active reversing valve Y 1st stage cool, 1st stage heat for heat pumps W 1st stage heat for non-heat pump systems, auxiliary heat for HP systems GL Low fan GH High fan
88

AVAILABLE ACCESSORIES
Thermostat - Rt6
RT6 Output Chart

Configuration ELC
HP `O' config HP `B' config

1 ST Cool Y, G
Y, G, O Y, G

1 ST Heat W, G, B
Y, G Y, G, B

2 ND Heat N/A
Y, W, G Y, G, B, W

The RT6 thermostat is configurable for di erent systems. The configuration directly a ects the outputs. Use the output chart to correctly configure and wire the thermostat to your system.

Configuration Mode
The configuration mode is used to set the to match your heating/cooling system. The functions with heat pump, air conditioning, or electric heat systems.
Thermostat comes configured for 1-stage heat / 1-stage cooling for use with all heat/cool and singlestage heat pump models.
To configure the , perform the following steps: 1. Verify the RT6 is in the OFF mode.
Press the SYS (left) button until o mode displays.

2. Remove the cover of the thermostat by gently pulling near one of the corners at the top of the thermostat.
3. Press the CONFIG button for 1 second while the RT6 is in OFF mode.

OFF CONFIG

Press the up or down button to change settings within each screen.
Press the right button to advance to the next screen. Note: Pressing the left button will return you to the previous screen.
To exit configuration mode, press the CONFIG switch for 1 second.

Up button Down button
Left Right button button

AVAILABLE ACCESSORIES

Thermostat - Rt6
Confi guration Mode Settings
To setup screens for con figuration mode are as follows: 1. System Set for heat pump, non-heat pump, reversing valve operation

System Heat Pump Heat Pump Heat/Cool and SingleStage Heat Pump Only

Setting HP `O' HP `B'

Reversing Valve Setting O - Energized in Cooling B - Energized in Heating

ELC N/A

Press the up or down button to select. Press the right button to advance to the next screen.
2. Temperature Scale (F or C) Choose Fahrenheit or Celsius. Press the up or down button to select. Press the right button to advance to the next screen.

3. 1st Stage Temperature Di erential (1°F to 5°F) (0.5°C to 2.5°C) Set the number of degrees between your "setpoint" temperature and your "turn on" temperature.
Press the up or down button to set di erential value.
Press the right button to advance to the next screen.

4. 2nd Stage Temperature Di erential and HP B only)

(1°F to 5°F) (0.5°C to 2.5°C)

(For HP 0

Set the number of degrees between when stage 1 turns on and when stage 2 turns on.

Press the up or down button to set di erential value.

Press the right button to advance to the next screen.

5. Staged O Outputs (For HP 0 and HP B only) Select whether the outputs for heating and cooling are staged o independently or are satisfied simultaneously. 1 = outputs staged o independently 0 = outputs o simultaneously Press the up or down button to set. Press the right button to advance to the next screen.

6. Auxiliary Delay ON (0-30 minutes) (For HP 0 and HP B only) Set the delay time in minutes for auxiliary heat to be locked out after a call for second stage. This extra savings feature is used to temporarily lock out auxiliary heat devices, allowing just heat pump to try to satisfy heat call. Press the up or down button to select. Press the right button to advance to the next screen.

7. (45°F to 90°F) (7°C to 32°C) Adjust to control the maximum heat set temperature allowed. Press the or button to select. Press the button to advance to the next screen.

8. Minimum Cool Setpoint (45°F to 90°F) (7°C to 32°C) Adjust to control the minimum cool set temperature allowed. Press the up or down button to select. Press the right button to advance to the next screen.

9. (+9°F to -9°F) (+4.5°C to -4.5°C) Adjust to calibrate displayed room temperature to match actual room temperature. When not set to 0, will display. Press the or button to select. Press the button to advance to the next screen.
90

AVAILABLE ACCESSORIES
Thermostat - Rt6
Mode of Operation
The RT6 is a 1-stage or 2-stage heat thermostat. It functions with air conditioning, heat pumps, or electric heat systems.
The thermostat activates the heating appliance when the room temperature is below the set heat temperature (by the di erential temperature). The RT6 will stop outputting when the call for heat has been satisfied. With heat pumps, the thermostat will not let the compressor come on for 4 minutes after it turns o . This protects your compressor.
When the room temperature is greater than the set cool temperature (by the di erential temperature), the cooling device is activated. The RT6 will stop outputting when the call for cooling is satisfied. The thermostat will not let the compressor come on for 4 minutes after it turns o . This protects your compressor.
The RT6 has three possible operating modes: OFF , Heat , and Cool mode. In o mode, the thermostat will not turn on heating or cooling devices. The manual fan can be turned on in all operating modes using the fan button. In heat mode, the thermostat controls the heating system. In the cool mode, the thermostat controls the cooling system.

Button Functions

Up button

SYS tem (left)

Down button (right)

UP Used to increase the set temperatures and to adjust configuration settings. DOWN Used to decrease the set temperatures and to adjust configuration settings. SYS (left) Used to change from OFF, HEAT, and COOL modes FAN (right) Used to turn on and o the indoor fan.

Thermostat - Rt6

Available Accessories

Operating Modes

There are three possible operating modes for the RT6 . O , Heat, and Cool modes are accessed by pressing the SYS (left) button.

OFF Mode
· In this mode, the thermostat will not turn on the heating or cooling devices
Note: The indoor fan can be turned on manually in every operating mode by pressing the FAN (right) button. The word FAN
OFF
shows on the display and the fan icon appears when the fan operates.

Heat Mode
· In this mode, the thermostat controls the heating system. When the heat outputs, the flame icon apprears on the display.
Note: For heat pumps, there is a four minute delay for your compressor to restart after it has turned o . To bypass the compressor time delay, go to OFF mode for 5 seconds.

Cool Mode
· In this mode, the thermostat controls the cooling system. When the cooling outputs, the snowflake icon apprears on the display.
Note: There is a four minute delay for your compressor to restart after it has turned o . To bypass the compressor time delay, go to OFF mode for 5 seconds.

Set Point Adjustment

Heat Set Point

· Use the SYS button to select Heat Mode. Press the up or down button to view the

current heat set point larger on the display. When the large set point is displayed,

the HEAT icon will blink. The up or down buttons can be used to adjust the set point.

After 5 seconds of inactivity the screen will display the room temperature and the

HEAT icon will not blink.

HEAT icon will blink.

Cool Set Point

· Use the SYS button to select Cool Mode. Press the up or down button to

view the current cool set point larger on the display. When the large set

point is displayed, the COOL icon will blink. The up or down buttons can

be used to adjust the set point. After 5 seconds of

inactivity the screen will display the room

COOL icon will blink.

temperature and the COOL icon will not blink.

Thermostat - Rt6

Available Accessories

Testing the Thermostat
Once the thermostat is configured, it should be thoroughly tested. CAUTION! : Do not energize the air conditioning system when the outdoor temperature is below
50 degrees. It can result in equipment damage or personal injury.
Heat Test
1. Press SYS (left) button until heat mode is displayed. 2. Adjust the set temperature so it is 5 degrees above the room temperature. 3. Heat should come on within a few seconds. 4. Adjust the set temperature 2 degrees below the room temperature and the
heat should turn o . There may be a fan delay on your system. Note: For heat pumps, there is a four-minute delay to protect your compressor after it turns o . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool Test
1. Press SYS (left) button until cool mode is displayed. 2. Adjust set temperature so it is 5 degrees below room temperature. 3. A/C should come on within a few seconds. 4. Adjust the set temperature 2 degrees above the room temperature and
the A/C should turn o . There may be a fan delay on your system. Note: There is a four-minute time delay to protect the compressor after it . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Fan Test
1. Press FAN (right) button. Fan displays. Indoor fan turns ON. 2. Press FAN (right) button. Indoor fan turns OFF.
OFF

Troubleshooting

Symptom
No display

Remedy
Check for 24 VAC at thermostat; display is blank when 24 VAC is not present

All thermostat buttons are inoperative

Verify 24 VAC is present; unit locks out when 24 VAC is not present

No response with first button press First button press activates backlight only

Thermostat turns on and o too frequently

Adjust temperature di erential (see Configuration Mode Settings 3 & 4)

Fan runs continuously

Press FAN (right) button to turn fan o

Room temperature is not correct

Calibrate thermostat (see Configuration Mode Setting 10)

Heat or Cool not coming on

Verify wiring is correct, gently pull on each wire to verify there is a good connection at terminal block

HEAT blinking

In heat set point screen, this is normal operation

COOL blinking

In cool set point screen, this is normal operation

Problem not listed above

Press Reset button once*

* Reset Button Function : Display is refreshed, configuration settings are unchanged.

RT6P AVAEIleLctrAonicBTheLrmEostatACCESSORIES
Thermostat - Rt6p
· 7 Day Programmable · Auto Changeover · 1-Stage Heat/1-Stage Cool
Systems · Configurable to: 2-stage heat
pump · Large Display With Backlight · Selectable Fahrenheit or Celsius
Installation, Operation & Application Guide

Parts Diagram

RESET CONFIG

R C GL GH O/B Y W

Icon Descriptions

Up button Down button

Specifications
Electrical rating: · 24 VAC (18-30 VAC) · 1 amp maximum per terminal · 3 amp maximum total load Temperature control range: 45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C) System configurations: 2-stage heat, 1-stage cool, heat pump, electric Timing: Anti-short Cycle: 4 minutes (bypass anti-short cycle delay by returning to OFF mode
for 5 seconds) Backlight Operation: 10 seconds Terminations: R, C, GL, GH, O/B, Y, W
Important Safety Information
WARNING! : · This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC · All wiring must conform to local and national electrical and building codes · Do not use air conditioning when the outdoor temperature is below 50 degrees; this can damage
your A/C system and cause personal injuries · Use this thermostat only as described in this manual
Package Contents/Tools Required
Package includes: RT6P thermostat on base, thermostat cover, wiring labels, screws and wall anchors, Installation, Operation and Application Guide
Tools required for installation: Drill with 3/16" bit, hammer, screwdriver
94

AVAILABLE ACCESSORIES

Thermostat - Rt6p

Mode of Operation
RT6P is a 1-stage cool/2-stage heat thermostat. It functions with air conditioning, heat pumps, or electric heat systems. It is programmable for 7 days a week and has auto changeover capability.
The thermostat activates the heating appliance when the room temperature is below the set heat temperature (by the di erential temperature). The RT6P will stop outputting when the call for heat has been satisfied. With heat pumps, the thermostat will not let the compressor come on for 4 minutes after it turns o to protect your compressor.
When the room temperature is greater than the set cool temperature (by the di erential temperature), the cooling device is activated. The RT6P will stop outputting when the call for cooling is satisfied. The thermostat will not let the compressor come on for 4 minutes after it turns o to protect your compressor.
The RT6P has four possible operating modes: OFF , Heat , Cool and Heat/Cool mode. In o mode, the thermostat will not turn on heating or cooling devices. In heat mode, the thermostat controls the heating system. In the cool mode, the thermostat controls the cooling system. In the Heat/Cool mode, the thermostat controls the heating and cooling system
The manual fan can be turned on in all operating modes using the fan button.
In program mode, the thermostat will automatically be controlled by the set program. Program mode can function with heat mode, cool mode, or heat & cool mode. The clock display alternates with the set temperature display for heat & cool mode.
The program schedule can be overridden by changing the set temperature (up or down button). This puts the RT6P thermostat into a 2-hour temporary hold. After 2 hours, it will automatically return to the program schedule.

Button Functions

UP Used to increase the set temperatures and to adjust configuration settings

DOWN Used to decrease the set temperatures and to adjust configuration settings
SYS (left) Used to change from OFF, HEAT, COOL and HEAT/COOL modes

SYS tem (left)

FAN (right) Used to turn on and o the indoor fan

SYS (left) and FAN (right) Used to enter and exit program operation

Up button Down button FAN (right)

To Remove Existing Thermostat

ELECTRICAL SHOCK HAZARD

Turn o power at the main service panel by removing

the fuse or switching the appropriate circuit breaker to the OFF position before

removing the existing thermostat.

1. Turn o power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker o .
2. Remove cover of old thermostat. This should expose the wires. 3. Label the existing wires with the enclosed wire labels before removing wires. 4. After labeling wires, remove wires from wire terminals. 5. Remove existing thermostat base from wall. 6. Refer to the following section for instructions on how to install this thermostat.

To Install Thermostat

ELECTRICAL SHOCK HAZARD

Turn o power at the main service panel by removing

the fuse or switching the appropriate circuit breaker to the OFF position before

removing the existing thermostat.

IMPORTANT: Thermostat installation must conform to local and national building and electrical codes & ordinances.
Note: Mount the thermostat about five feet above the floor. Do not mount the thermostat on an outside wall, in direct sunlight, behind a door, or in an area a ected by a vent or duct.

1. Turn o power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker o .
2. To remove cover, pull gently at the seam at the top. 3. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through
the wire opening in the base of the thermostat). 4. Mark the placement of the mounting holes. 5. Set thermostat base and cover away from working area. 6. Using a 3/16" drill bit, drill holes in the places you have marked for mounting. 7. Use a hammer to tap supplied anchors in mounting holes. 8. Align thermostat base with mounting holes and feed the control wires through slit in thermal
intrusion barrier and into wire opening. 9. Use supplied screws to mount thermostat base to wall. 10. Insert stripped, labeled wires in matching wire terminals.
CAUTION!: Be sure exposed portion of wires does not touch other wires.
11. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the proper terminal.
12. Turn on power to the system at the main service panel. 13. Configure thermostat to match the type of system you have. 14. Replace cover on thermostat by snapping it in place. 15. Test thermostat operation as described in "Testing the Thermostat".
95

AVAILABLE ACCESSORIES

Thermostat - Rt6p

Wiring Diagrams

Heat/Cool Systems

Heat pump with electric backup

Configuration ELC
HP `O' config HP `B' config

RT6P Output Chart

1 ST Cool Y, G
Y, G, O Y, G

1 ST Heat W, G, B
Y, G Y, G, B

2 ND Heat N/A
Y, W, G Y, G, B, W

The RT6P thermostat is configurable for di erent systems. The configuration directly a ects the outputs. Use the output chart to correctly configure and wire the thermostat to your system.

Configuration Mode
The configuration mode is used to set the RT6P to match your heating/cooling system. The RT6P functions with heat pump, air conditioning, or electric heat systems.
Note: Thermostat comes configured for 1-stage heat / 1-stage cooling for use with all heat/cool and single-stage heat pump models. For Friedrich PTHP models follow the instructions below to configure the thermostat for two-stage heat pump operation using the `O' terminal.
To configure the RT6P , perform the following steps: 1. Verify the RT6P is in the OFF mode.
Press the SYS (left) button until o mode displays.

2. Remove the cover of the thermostat by gently pulling near one of the

corners at the top of the thermostat.

OFF

3. Press the CONFIG button for 1 second while the RT6P is in OFF mode.
CONFIG

Press the up or down button to change settings within each screen.

Up button
Down button

Press the button to advance to the next screen. Pressing the left button will return you to the previous screen.

Left Right button button

To exit configuration mode, press the CONFIG switch for 1 second.
96

AVAILABLE ACCESSORIES

Thermostat - Rt6p

Configuration Mode Settings
The setup screens for Configuration Mode are as follows:

1. System Set for heat pump, non-heat pump, reversing valve operation

System Heat Pump Heat Pump Heat/Cool and SingleStage Heat Pump Only

Setting HP `O' HP `B'

Reversing Valve Setting O - Energized in Cooling B - Energized in Heating

ELC N/A

Press the up or down button to select. Press the right button to advance to the next screen.

2. Temperature Scale (F or C) Choose Fahrenheit or Celsius. Press the up or down button to select. Press the right button to advance to the next screen.

4. 2nd Stage Temperature Di erential (For HP 0 and HP B only)

(1°F to 5°F) (0.5°C to 2.5°C)

Set the number of degrees between when stage 1 turns on and when stage 2 turns on.

Press the up or down button to set di erential value.

Press the right button to advance to the next screen.

5. Staged O Outputs ( For HP 0 and HP B only ) Select whether the outputs for heating and cooling are staged o independently or are satisfied simultaneously. 1 = outputs staged o independently 0 = outputs o simultaneously Press the up or down button to set. Press the right button to advance to the next screen.

6. Deadband (1°F to 9°F) (1°C to 5°C) Select the minimum di erence between heat set point and cool set point when in auto changeover mode. Press the up or down button to set. Press the right button to advance to the next screen.

7. Auxiliary Delay ON (0-30 minutes) ( For HP 0 and HP B only ) Set the delay time in minutes for auxiliary heat to be locked out after a call for second stage. This extra savings feature is used to temporarily lock out auxiliary heat devices, allowing just heat pump to try to satisfy heat call. Press the up or down button to set. Press the right button to advance to the next screen.
8. Maximum Heat Setpoint (45°F to 90°F) (7°C to 32°C) Adjust to control the maximum heat set temperature allowed. Press the up or down button to select. Press the right button to advance to the next screen.

9. Minimum Cool Setpoint (45°F to 90°F) (7°C to 32°C) Adjust to control the minimum cool set temperature allowed. Press the up or down button to select. Press the right button to advance to the next screen.

10. Room Temperature O set (+9°F to -9°F) (+4.5°C to -4.5°C) Adjust to calibrate displayed room temperature to match actual room temperature. Note: When not set to 0, will display. Press the up or down button to select. Press the right button to advance to the next screen.
97

AVAILABLE ACCESSORIES
Thermostat - Rt6p
Setting the Time and Day of the Week
The time and day of the week must be set for your program schedule to operate correctly.
1. Press the SYS (left) button until you are in the OFF mode. 2. Press and hold the PROG button (SYS (left) and FAN (right) buttons
pressed simultaneously) in for 6 seconds.
3. Time displays (hour flashing). Press the up or down button to adjust the hour.
4. Press the FAN (right) button once to select minutes (minutes flashing). Press the up or down button to adjust the minutes.

5. Press the FAN (right) button once to select day of the week (TODAY flashing).
Press the up or down button to select current day of the week.
Note: At any time, press the SYS (left) button to return to the previous screen or press the FAN (right) button to advance to the next screen.
Press the PROG button in for 2 seconds to lock values into memory and return to the OFF mode or press the FAN (right) button once to enter programming.

Programming
Program Overview
This programmable thermostat has four periods (MORN, DAY, EVE, NITE) that are customizable for each day of the week. Each period will have a start time, heat temperature, cool temperature and programmable fan option. The thermostat monitors the day and time, while maintaining the specific conditions you have chosen for each period in your program.

Setting the program schedule: 1. Press the SYS (left) button until you are in OFF mode. 2. Press and hold the PROG button (SYS and FAN buttons pressed
simultaneously) for 6 seconds. 3. Press the FAN (right) button 3 times. 4. SUN thru SAT are blinking.

From this screen you have 2 options: 1. Press the FAN (right) button to begin programming all 7 days at one time, or 2. Press the up button to see the other programming options.
Note: The days of the week shown on the display will be programmed simultaneously. The screens are listed below.

Screen 1 SUN MON TUE WED THU FRI SAT

Screen 2

MON TUE WED THU FRI

Screen 3

MON

Screen 4

TUE

Screen 5

WED

Screen 6

THU

Screen 7

FRI

Screen 8 SUN

SAT

Screen 9

SAT

Screen 10 SUN

AVAILABLE ACCESSORIES

Thermostat - Rt6p

Programming (continued)
From any of the screens above, you can press the FAN (right) button to begin entering your program schedule. The days shown on the display will all be programmed simultaneously. Once the FAN (right) button is pressed, MORN blinks. Use the up or down button to select a di erent period ( MORN , DAY , EVE , NITE ). Press FAN (right) button to advance to the next screen. Transition time hour blinks. Use the up or down button to select a di erent hour. Press FAN (right) button to advance to the next screen. Transition time minutes blink. Use the up or down button to select di erent minutes. Press FAN (right) button to advance to the next screen. Heat set temperature displays. Use the up or down button to adjust the heat set temperature. Press FAN (right) button to advance to the next screen. Cool set temperature displays. Use the up or down button to adjust the cool set temperature. Press FAN (right) button to advance to the next screen. Programmable fan screen displays. Use the up or down button to select: Choose: O P rogrammable fan dis abled >OR < On Indoor fan on continuously
Note: Programmable fan operates in Program mode only. Repeat above steps to program the four periods per day. When the program schedule is complete, press and hold the PROG button (SYS and FAN buttons pressed simultaneously) in for 2 seconds to return to the OFF mode.

Factory Preprogramming
The thermostat comes pre programmed with the following schedule:

MONDAY thru
SUNDAY

MORN HEAT COOL FAN

6:00 AM 70°F 78°F O

DAY HEAT COOL FAN

8:00 AM 62°F 85°F O

EVE HEAT COOL FAN

6:00 PM 70°F 78°F O

NITE HEAT COOL FAN

10:00 PM 62°F 82°F O

Personal Program Schedule

Use the following personal program schedule to record your settings:

MONDAY
1

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

TUESDAY
2

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

WEDNESDAY
3

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

THURSDAY
4

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

FRIDAY
5

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

SATURDAY
6

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

SUNDAY
7

MORN HEAT COOL FAN

DAY HEAT COOL FAN

EVE HEAT COOL FAN

NITE HEAT COOL FAN
NITE HEAT COOL FAN
NITE HEAT COOL FAN
NITE HEAT COOL FAN
NITE HEAT COOL FAN
NITE HEAT COOL FAN
NITE HEAT COOL FAN

AVAILABLE ACCESSORIES
Thermostat - Rt6p
Operating Modes
There are four possible operating modes for the RT6P . O , Heat , Cool and Heat/Cool modes are accessed by pressing the SYS (left) button. The RT6P also lets you operate in any mode as a programmable thermostat.
OFF Mode · In this mode, the thermostat will not turn on the heating or cooling
devices Note: The indoor fan can be turned on manually in every operating mode by pressing the FAN (right) button. The word FAN shows on the display and the fan icon appears when the fan operates.
Heat Mode · In this mode, the thermostat controls the heating system. When the heat
outputs, the flame icon appears on the display. Note: For heat pumps, there is a four minute delay for your compressor to restart after it has turned o . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool Mode · In this mode, the thermostat controls the cooling system. When the
cooling outputs, the snowflake icon appears on the display. Note: There is a four minute delay for your compressor to restart after it has turned o . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool and Heat Mode (Auto Changeover) · In this mode, the thermostat controls the cooling and heating systems,
automatically changing over from one to the other as needed. · The timing display alternates with the set temperature every 10 seconds
in the cool and heat mode.
Program Mode · In this mode, the program function is on ( PROG displays), and the
thermostat will automatically be controlled by the set program schedule. Program mode can function with heat mode, cool mode, or heat & cool mode. The program schedule can be overridden by changing the set
PROG
temperature (up or down button). After 2 hours, the program schedule will automatically be resumed. To manually return to the program schedule, press the PROG button twice.

100

Set Point Adjustment

Heat Set Point

· Use the SYS button to select Heat Mode. Press the up or down button to

view the current heat set point larger on the display. When the large set

point is displayed, the HEAT icon will blink. The up or down buttons can

be used to adjust the set point. After 5 seconds of inactivity the screen will display the room temperature and the HEAT icon will not blink.

HEAT icon will blink.

Cool Set Point

· Use the SYS button to select Cool Mode. Press the up or down button to

view the current cool set point larger on the display. When the large set

point is displayed, the COOL icon will blink. The up or down buttons can

be used to adjust the set point. After 5 seconds of inactivity the screen will display the room temperature and the COOL icon will not blink.

COOL icon will blink.

Heat & Cool Set Points
· Use the SYS button to select Heat/Cool Mode. Press the up or down button to adjust the current set points. When the set points are displayed for adjustment, the ROOM temperature leaves the screen. The up or down buttons can be used to adjust the set points. After 5 seconds of inactivity, the screen will display the Heat and Cool set points and the room temperature.

AVAILABLE ACCESSORIES
Thermostat - Rt6p
Testing the Thermostat
Once the thermostat is configured, it should be thoroughly tested. CAUTION! : Do not energize the air conditioning system when the outdoor temperature is below 50 degrees. It can result in equipment damage or personal injury.
Heat Test 1. Press SYS (left) button until heat mode is displayed. 2. Adjust the set temperature so it is 5 degrees above the room temperature. 3. Heat should come on within a few seconds. 4. Adjust the set temperature 2 degrees below the room temperature and the
heat should turn o . There may be a fan delay on your system. Note: For heat pumps, there is a four-minute delay to protect your compressor after it turns o . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool Test 1. Press SYS (left) button until cool mode is displayed. 2. Adjust set temperature so it is 5 degrees below room temperature. 3. A/C should come on within a few seconds. 4. Adjust the set temperature 2 degrees above the room temperature and
the A/C should turn o . There may be a fan delay on your system. Note: There is a four-minute time delay to protect the compressor after it turns o . To bypass the compressor time delay, go to OFF mode for 5 seconds.
Fan Test 1. Press FAN (right) button. Fan displays. Indoor fan turns ON. 2. Press FAN (right) button. Indoor fan turns OFF.

Troubleshooting

Symptom

Remedy

No display

Check for 24 VAC at thermostat; display is blank when 24 VAC is not present.

All thermostat buttons are inoperative

Verify 24 VAC is present; unit locks out when 24 VAC is not present

No response with first button press

First button press activates backlight only

Thermostat turns on and o too Adjust temperature di erential (see Configuration Mode

frequently

Settings 3 & 4)

Fan runs continuously

Press FAN (right) button to turn fan o

Room temperature is not correct

Calibrate thermostat (see Configuration Mode Setting 10)

Heat or Cool not coming on

Verify wiring is correct, gently pull on each wire to verify there is a good connection at terminal block

HEAT blinking

In heat set point screen, this is normal operation

COOL blinking

In cool set point screen, this is normal operation

Not following program schedule Verify time is correct, check am/pm, verify it is in program mode (PROG displays)

"PROG" on display

Press both SYS (left) and Fan (right) to enter or exit the program mode

Problem not listed above

Press Reset button once*

* Reset Button Function : Display is refreshed, configuration settings are unchanged.

101

FRIEDRICH

Model WRT1

AVAILABLE ACCESSORIES
ThermInosstatta-lWlaRTti1on and Operation Instructions

This manual covers the following models:
· WRT1 PTAC Wireless Remote Thermostat · Base Module

Description

Gas or Oil Heat

Yes

Electric Furnace

Yes

Heat Pump (No Aux. or Emergency Heat)

Yes

Heat Pump (with Electric Aux.)

Yes

Heat Pump (with Gas Aux.)

Multi-stage Systems

Heat Only Systems

Yes

Heat Only Systems - Floor or Wall Furnaces

Yes

Cool Only Systems

Yes

High and Low Fan Speed

Yes

Millivolt

Emergency Heat

Conventional Single Stage Furnace

Yes

Geothermal

Yes

Power Type
Battery Power Hardwire (Common Wire) Hardwire (Common Wire) with Battery Backup
A trained, experienced technician must install this product.
Carefully read these instructions. You could damage this product or cause a hazardous condition if you fail to follow these instructions.

Need Help?
For assistance with this product, please call Friedrich Technical Assistance Center at 877-599-5665 ext. 261 between the
hours of 8:00 AM - 5:00 PM CST.

102

AVAILABLE ACCESSORIES
Thermostat - WRT1 Quick Reference
103

AVAILABLE ACCESSORIES
Thermostat - WRT1 Thermostat Operation
104

AVAILABLE ACCESSORIES
Thermostat - WRT1 InstallationTips
105

AVAILABLE ACCESSORIES
Thermostat - WRT1 Base Module Tips
106

AVAILABLE ACCESSORIES
Thermostat - WRT1 Sub-Base Installation
107

AVAILABLE ACCESSORIES
Thermostat - WRT1 Base Module Installation
108

AVAILABLE ACCESSORIES
Thermostat - WRT1 Wiring
109

AVAILABLE ACCESSORIES
Thermostat - WRT1 Wiring
110

AVAILABLE ACCESSORIES
Thermostat - WRT1 Technician Setup
111

AVAILABLE ACCESSORIES
Thermostat - WRT1 Technician Setup
112

AVAILABLE ACCESSORIES
Thermostat - WRT1 Establishing Communication
113

AVAILABLE ACCESSORIES
Thermostat - WRT1 Mount Thermost and Battery Installation
114

AVAILABLE ACCESSORIES
Thermostat - WRT1 Specifications
115

Drain Pan

AVAILABLE ACCESSORIES
Model VPDP1

Installation Instructions
DRAIN PAN
For VEA24, VHA18, and VHA24 units only.
Please read these instructions completely before attempting installation. NOTE: This drain pan must be installed with all VEA24, VHA18 and VHA24 units.

STEP 1: CUT OPENING IN GASKET
Remove an 8" portion of the weather seal gasket from the bottom left surface of the plenum. To remove: Cut the gasket in the lower left corner of the plenum. Then make a second cut 8" from the left corner. The gasket should peel away from the plenum leaving a clean mounting surface (See detail A).
A

8.00
DETAIL A
STEP 2: SEAL AND SET PAN
Prior to placing the drain pan into the opening run a 1/4" bead of sealant the entire width of the removed gasket. The secondary overflow lip must extend into the plenum to prevent water leaks. The pan should be mounted against the 3/4" flange of the plenum, refer to view A.
2.00
A Sealant

B
920-150-01 (8-17)
116

Drain Pan

AVAILABLE ACCESSORIES

STEP 3: INSTALL DRAIN PAN
Attach the drain pan to the closet floor with the appropriate field supplied hardware.
IMPORTANT - To prevent water leaks use only the factory supplied mounting holes. NEVER make penetrations in the drain pan itself.

STEP 4: INSTALL DRAIN PLUG
The drain pan comes with both left and right-hand drain connections locations. Determine which of the two connections will be used to drain the condensate. Then, with the factory supplied drain plug, plug the unused opening. NOTE - proper sealant must be applied to the connection to prevent leaks.
117

Drain Pan

AVAILABLE ACCESSORIES

STEP 5: INSTALL DRAIN LINE
Condensate line routing options are shown below. Choose the one that best suits your installation. Never run
the condensate line as shown in Option 4 below, as the drain line will come into contact with the factory-installed
isolators beneath the unit.

Option 1
Run condensate line
to right of unit

Option 2
Run condensate line
beneath unit platform

Option 3
Run condensate line
to left of unit

Option 4
Do not run
condensate line
back toward unit

IMPORTANT - The drain pan and line must be kept free from debris. Prior to installing the chassis ensure that there are no blockages in the drain pan or line.
118

Friedrich Air Conditioning Company 10001 Reunion Place, Suite 500 San Antonio, Tx 78216 800.541.6645 www.friedrich.com
VERT-I-PAK® A SERIES SINGLE PACKAGE VERTICAL AIR CONDITIONERS
LIMITED WARRANTY
SAVE THIS CERTIFICATE
In the event that your unit needs servicing, contact your nearest authorized service center. If you do not know the nearest service center, ask the company that installed your unit or contact use - see address and telephone number above. To obtain service and/or warranty parts replacement, you must notify an authorized FRIEDRICH Air Conditioning Co. service center, distributor, dealer, or contractor of any defect within the applicable warranty period.
When requesting service: please have the model and serial number from your unit readily available.
the following applies: FRIEDRICH VERT-I-PAK A SERIES HEAT PUMPS & AIR CONDITIONERS
LIMITED WARRANTY - FIRST YEAR (Twelve (12) months from the date of installation). Any part found to be defective in the material or workmanship will be repaired or replaced free of charge by our authorized service center during the normal working hours; and
LIMITED WARRANTY - SECOND THROUGH FIFTH YEAR (Sixty (60) months from the date of installation). ON THE SEALED REFRIGERATION SYSTEM. Any part of the sealed refrigeration system that is defective in material or workmanship will be repaired or replaced free of charge (excluding freight charges) by our authorized service center during normal working hours. The sealed refrigeration system consists of the compressor, metering device, evaporator, condenser, reversing valve, check valve, and the interconnecting tubing.
These warranties apply only while the unit remains at the original site and only to units installed inside the continental United States, Alaska, Hawaii, Puerto Rico, Mexico and Canada. The warranty applies only if the unit is installed and operated in accordance with the printed instructions and in compliance with applicable local installation and building codes and good trade practices. For international warranty information, contact the Friedrich Air Conditioning Company - International Division.
Any defective part to be replaced must be made available to FRIEDRICH in exchange for the replacement part. Reasonable proof must be presented to
can be new or re-manufactured. Replacement parts and labor are only warranted for any unused portion of the unit's warranty.
We will not be responsible for and the user will pay for: 1. Service calls to:
its installed location when not accessible for service required. E) Correct improper installations.
2. Parts or labor provided by anyone other than an authorized service center.
3. Damage caused by:
Faulty installation or application of the unit. G) Operation of the unit during construction.
We shall not be liable for any incidental, consequential, or special damages or expenses in connection with any use or failure of this unit. We
Any implied warranties shall last for one year after the original purchase date. Some states and provinces do not allow limitations on how long an implied warranty or condition lasts, so the above
warranties and other rights and remedies provided by law.
Performance of Friedrich's Warranty obligation is limited to one of the following methods: 1. Repair of the unit 2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit. 3. Providing a replacement unit of equal value
Air Conditioning.
In case of any questions regarding the provisions of this warranty, the English version will govern.
119

CUSTOMER SATISFACTION and QUALITY ASSURANCE
Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and controlling warranty costs. As an Authorized Service Provider you play a vital role in these areas. By adhering to the policies and procedures you provide us with vital information on each warranty repair you complete. This information is used to identify product failure trends, initiate corrective action, and improve product quality, thereby further reducing warranty expenses while increasing customer satisfaction levels.

FRIEDRICH AUTHORIZED PARTS DEPOTS

AAA Refrigeration Service 1322 24th Street, Suite B Kenner, Louisiana 70062 504-464-7444 877-813-7444
Alamo Service Company 1450 North Flores Street San Antonio, Texas 78212 210-2272450 800-328-2450

The Gabbert Company 6868 Ardmore Houston, Texas 77054
713-747-4110 800-458-4110

Reeve Air Conditioning, Inc. 2501 South Park Road Hallandale, Florida 33009 954-962-0252 800-962-3383

Johnstone Supply of Woodside 27-01 Brooklyn Queens Expway Woodside, New York 11377 718545-5464 800-431-1143

TECHNICAL SUPPORT CONTACT INFORMATION
Friedrich Air Conditioning Co. 10001 Reunion Place, Suite 500 · San Antonio, Texas 78216 1-800-541-6645 www.friedrich.com
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