CARRIER Air Handler (indoor Blower&evap) Manual L0410227

User Manual: CARRIER CARRIER Air Handler (indoor blower&evap) Manual CARRIER Air Handler (indoor blower&evap) Owner's Manual, CARRIER Air Handler (indoor blower&evap) installation guides

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619E018,024,

40QNB,QNH018,024

High Wall Fan Coil Units

Cancels: II 619E-18-2

Installation, Start-Up

and Service Instructions

II 619E-18-3

9/1/02

CONTENTS

Page

SAFETY CONSIDERATIONS ...................... 1

GENERAL ....................................... 1,2

INSTALLATION ................................ 2-13

Step 1 -- Complete Pre-lnstallation

Checks ......................................... 2

• UNPACK UNIT

• INSPECT SHIPMENT

Step 2 -- Select Location ......................... 2

Step 3-- Attach Mounting Bracket to Wall ....... 5

Step 4 -- Connect Refrigerant Piping ............ 5

Step 5 -- Connect Condensate Drain Line ....... 11

Step 6 -- Make Electrical Connections .......... 11

Step 7 -- Make Connections to

Outdoor Unit .................................. 13

•COOLING-ONLY SYSTEMS

• HEAT PUMP SYSTEMS

Step 8 -- Install Fan Coil Unit Onto Mounting

Bracket ....................................... 13

START-UP .................................... 13-16

Control System ................................. 14

After Extended Shutdowns ...................... 14

Seasonal Changeovers .......................... 14

To Turn The Unit On and Off ..................... 14

Adjusting Airflow ................................ 14

Operating Mode Memory ........................ 15

Automatic Operation (Auto) Mode ............... 15

Operating Fault Diagnosis ....................... 15

Microprocessor Control Operation .............. 15

CLEANING AND MAINTENANCE .............. 17,18

Lubrication ...................................... 17

To Install or Replace Remote Controller

Batteries ...................................... 17

To Set the Current Time ......................... 17

To Remove and Clean or Replace Air Filters ..... 17

•TO REMOVE AIR FILTERS

• TO CLEAN OR REPLACE FILTERS

To Clean Indoor Unit Front Panel ................ 18

To Clean Indoor Coil ............................ 18

To Clean Outdoor Coil (Outdoor Unit) ........... 18

Cleaning Condensate Drains .................... 18

SERVICE ........................................ 19

Diagnostic Codes ............................... 19

System Tests .................................... 19

•THERMISTOR TESTS

• THERMISTORS

• COMPRESSOR FAILURE

• REVERSING VALVE FAILURE (Heat Pump Only)

Page

System Safeties and Interlock ................... 19

• INDOOR FAN FAILURE

• COMPRESSOR SHORT-CYCLING PROTECTION

• INDOOR COIL FREEZE PROTECTION

(Cooling or Dehumidification Mode Only)

• INDOOR COIL HIGH-TEMPERATURE

PROTECTION (Heat Pump Systems Only)

TROUBLESHOOTING ......................... 19-25

STA RT-UP CHECKLIST ................... CL- 1,CL-2

SAFETY CONSIDERATIONS

Installing and servicing air-conditioning equipment can be

hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install or

service air-conditioning equipment.

Untrained personnel can perform basic maintenance, such

as clemling and replacing tilters. All other operations should be

performed by trained selwice personnel. When working on air-

conditioning equipment, observe precautions in literature and

on tags and labels attached to unit.

Follow all safety codes. Wear safety glasses mid work

gloves. Use quenching cloth for brazing operations. Have fire

extin_isher available. Read these instructions thoroz(,_hl3<

Consult local building codes and National Electrical Code

(NEC) for special installation requirements.

Before installing or servicing system, always turn offmain

power to system. There may be more than one disconnect

switch. Turn offindoor tan coil power if applicable. Electri-

cal shock can cause personal injury.

GENERAL

The heat pump hi_l walt tan coil units (Fig. 1) come with

supplemental electric heat. If your application requires heating,

heat pump units must be used, both outdoors and indoors. See

Table 1 for recommended system combinations.

)

Fig. 1 -- Typical High Wall Fan Coil Unit

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 534-043 Printed in U.S.A. Form 40QN-6SI Pg 1 9-02 Replaces: 40QN-4SI

Table 1 -- System Combinations for Indoor and

Outdoor Units

SYSTEM INDOOR UNIT OUTDOOR UNIT

40QNB018 38HDC, HDL018

40QNB024 38HDL018, 38HDC,HDL024

Cooling Only 40QNB018 (2) 38HDS024*

Systems 619ENX0180E0 538ANX, JNX018

619ENX0240E0 538JNX018, 538ANX,JNX024

(2) 619ENX0180E0 538SNX024

40QNH018 38BK018

Heat Pump 40QNH024 38BK024

Systems 619ENX0180H0 538DNX018

619ENX0240H0 538DNX024

*Multi-split systems can accommodate fan coil units of various types

with one condensing unit. The combinations listed in this table are

those which use only high-wall units (not in combination with any

other type of fan coil unit). Refer to system presale literature or

Price Pages for more details.

NOTE: Only match systems as shown in this table.

INSTALLATION

Refer to Table 1 to make sure the correct indoor unit(s) is

installed with the correct outdoor unit.

Installation instructions for the tan coil units are contained

in this manual. Reth to this manual for proper installation of

the complete system. Note that the outdoor units are shipped

with installation and service instructions for basic installation

of the outdoor section. Be sure to make the modifications in

Make Connections to the Outdoor Unit section on page 13 of

this literature, so that the outdoor unit will operate properly

with the control system. Be sure the unit will be operated with-

in the application guidelines shown in Table 2. When installing

the outdoor unit, note that for cooling operation below 55 F, it

is necessary to equip the outdoor unit with the low ambient

control accessory. The low ambient control is standard on

ruuhi-split units.

Refer to Table 3 for all recolrnnended accessories when

installing low ambient control.

To install this system, you will need:

• Indoor t;an coil sections* with standard wireless remote

controller

• Outdoor condensing unit

• A low-ambient or winter start kit (if required t\_r your

application)

*More than one tan coil unit may be used with the muhi-split

unit. Refer to ruuhi-sptit system Price Pages for full details.

NOTE: Field-supplied refrigerant pipe, drain pipe, wire, etc.,

are also required to install unit.

Be sure you have the required parts betbre beginning instal-

lation. The indoor section uses a microprocessor control sys-

tem to deliver optimum comfort and efficiency. Be sure to fol-

low these instructions carefully to obtain proper functioning of

the unit.

Step 1 -- Complete Pre-lnstallation Checks

UNPACK UNIT Store the unit in the original packa_ng

until it is moved to the final site for installation. When remov-

ing the unit tiom the carton, lift by its 4 comers. Also, note that

there is a plastic bag containing mounting scaews taped to the

ruounting bracket.

INSPECT SHIPMENT tYpon receipt of shipment check

the unit (Fig. 1) for dmnage. Forward claim papers directly to

the transportation company. Manuthcturer is not responsible

for damage incurred in transit.

Table 2 -- Application Ranges

COOLING MODE

Maximum Minimum

Indoor Outdoor Indoor Outdoor

Unit Unit Unit Unit

95 F DB 67 F DB 55 F DB*

71 FWB 115FDB 57FWB 0°FDB1-

HEATING MODE

Maximum Minimum

Indoor Outdoor Indoor Outdoor

Unit Unit Unit Unit

80 F DB 75 F DB 55 F DB 0° F DB

71 F WB 65 F WB

LEGEND

DB -- Dry Bulb

WB -- Wet Bulb

*Single zone systems.

1-Multi-zone systems.

NOTE: Unit may be equipped with a low-ambient control or winter

start kit that will allow operation down to -20 F.

Check all items. See Table 4. If any item is missing notii_

your distributor. To prevent loss or damage, leave all parts in

their original packages until installation.

Step 2 -- Select Location -- Consult local building

codes and NEC for special installation requirements.

There are several ways to install the unit for different types

of wall construction. These instructions do not cover all instal-

lation methods. As a typical installation, these instructions

focus primarily on mounting the unit to wall studs in new con-

struction. See Fig. 2 for unit dimensions and Fig. 3 for required

clearances. Plan your installation carefully before you

begin. Listed below are some guidelines to follow when deter-

ruining a location for the unit.

1. Place the unit so it faces the nonnat location of room

occupants.

2. Allow sufficient space for airflow clearance, wiring,

reliigerant piping, and unit servicing. See Fig. 2 and 3.

3. Select walls that are:

a. Strong enough to support the unit's weight.

b. Accessible to convenient condensate drainage.

c. Free of obstacles that may block air circulation to

the fan coils.

d. Outside walls (if possible) to make piping easier.

Table 3 -- Recommended Accessories for Low Ambient Control

UNIT LOW AMBIENT CRANKCASE WINTER ISOLATION WIND BAFFLE

CONTROL HEATER START KIT RELAY

38BK, 538BNX 53DS-900---60 -- KAAWS0101AAA KHAIR0101AAA 53DS-900---070

38HDC, 538ANX 53DS-900---60 KAACH 1201AAA* KAAWS0101AAA -- 53DS-900---070

38HDL, 538JNX 53DS-900---60 -- KAAWS0101AAA -- 53DS-900---070

*Not required for 38HDC018.

4. Place the top of the fan coil unit up to 10 ft above floor

level, making sure the unit is at least 10 in. down from

the ceiling to permit proper air intake. Also, make sure

that the unit is not placed directly over anything to pre-

vent filter removal or block airflow.

5. Make sure units are easily accessible to electrical

power.

6. Refrigerant piping can enter the unit through the

prepunched holes. Refrigerant piping cml run up or

do,a_ along the wall, to the right or left along the watt,

straight through the wall, or into the wall (Fig. 4).

Once the piping is through the wall, it can run inside

walls, in ceilings, between floors, or straight to the

outside.

NOTE: Run refrigerant piping as directly as possible,

and avoid any unnecessary turns or bends.

7. Condensate piping can be directed through the inside

wall to an approved drain, or directed straight outside.

NOTE: The piping hole for the condensate line must

be sloped downward to ensure proper drainage.

See Tables 5A-5F for maximum line length.

14.17

[360]

I ...............1

LINFRAREO REMOTE OVERRIDE SWITCH

(BEHIND ACCESS COVER}

FOR REFR]GERANT, DRAIN,

POWER, AND SIGNAL tINES

FRIGHT SIDE VIEW]

•_NOCKOUT FOR RIGHT

x_ _DE REFRIGERANT*

A_' ORAIN, POWER•

AND SIGNAL LINES

[220]

REFRIGERANT, DRAIN, POWER,

AND EIGNAL LINEB

/ -- UNIT OUTLI_

UNIT SIZE WEIGHT

018 39 Ib (17.5 kg)

024 43 Ib (19.5 kg)

[105] [4701

[4SOl _2 Z12B3

+35 DIA (NOTE 3)

[B01

NOTES:

1. Dimensions in ( ) are in millimeters.

2. I_ Direction of airflow.

3. Refrigerant, drain, and power connections may be made in

unit rear, bottom, left side, or right side.

4. Refrigerant is metered by AccuRater® device in the fan coil unit. A

thermostatic expansion valve is used in the outdoor unit on multi-split

applications. Insulate both refrigerant lines on heat pump and multi-

split applications.

5. The 4-in. left side clearance is an absolute minimum. Clearances of

10qn. are recommended for proper unit operation.

6. Do not insert a trap in condensate drain line. The drain is internally

trapped.

Fig. 2 -- Fan Coil Dimensional Drawing

Table4-- High Wall Unit Package Contents

ITEM QUANTITY

Unit Mounting Template 1

Unit Mounting Bracket 1

1-in. Lag Screws For Unit Mounting 8

Hollow Wall Anchor Bolts For Unit Mounting 5

Wall Sleeve With Wall Cap 1

Infrared Wireless Remote Control Assembly 1

AAA Batteries (For Remote Control) 2

Remote Control Mounting Bracket 1

3/8-in. Lag Screws For Remote Mounting Bracket 2

35 ft Long High Voltage Power Wiring (2-wire with ground) 1

35 ft Long Low Voltage Thermistor Wiring (1613 wire) 1

AccuRater@ Body and Piston* 1

Owner's Manual 1

Installation Instructions 1

Warranty Registration Card 1

*For heat pumps: additional heating AccuRater body and piston shipped with outdoor unit.

10"*

m12" ,,,,,,,,,,,,,,,,,,,-D

36 _

*A clearance of 4 in. is the absolute minimum. A 10-in. clearance is recommended for proper operation.

NOTE: Remove unit front cover for control box access.

Fig. 3 -- Minimum Required Clearances

POSSIBLE PIPING DIRECTIONS

RIGHT __

SIDE

KNOCKOUT

_"__ LEFT

A _ SiDE

.............. II _ KNOCKOUT

BOttOM KNOCKOUT It

PREPUNCHED HOLES

FOR RIGHT

SIDE PiPiNG FOR

BOTTOM/REAR

PIPING

Fig. 4- Refrigerant Piping

FOR LEFT

SIDE PIPING

Step 3 -- Attach Mounting Bracket to Wall

1. Decide how the refrigerant wilt be piped. It'necessary,

knock out the appropriate pre-punched holes (Fig. 4)

on the unit for piping and electrical connections.

2. Remove the bracket from the fan coil unit.

3. Using a carpenter's level, fasten the mounting brackets

into the studs in the wall at least 10 in. away from the

ceiling with the 8 screws provided. Always be sure to

insert screws into the top 2 holes indicated in Fig. 5.

Make sure the attached bracket will support a 200 lb

vertical load. For a masonry wall, anchor shields can

be used to attach the bracket to the wall.

4. Temporarily hang the unit on the bracket to check

location and level.

If mounting bracket is not mourned level, the indoor section

will be mounted unevenly, and condensate drainage water

may drip onto the floor. Also, a gap between the bracket and

the wall may result in vibration mid noise from the iMoor

section.

Mark and cut condensate and piping holes.

a. For piping through the wall, mark the wall below

the condensate connection and cut a 2t/2-in. hole

into the wall at either point "A" or point "B" in

Fig. 6.

NOTE: The 21/2-in. hole must be made at a do,amward

slope to ensure proper condensate drainage. See Fig. 7.

Slope the condensate line at a minimum pitch of 1/4-in.

per foot of line. The condensate line cannot be mn up

for upper piping connections only refrigerant lines

may be mn up.

b. Push the wall sleeve (factory supplied with the

unit) through the 21/2-in. wall opening.

Step 4 -- Connect Refrigerant Piping -- Fan coil

units may be connected to the outdoor units using field-supplied

refrigerant grade piping. Refer to Tables 5A-5F for the correct

size piping. The length of reffigermlt pipe depends on the unit

placement and building structure; mn pipes as directly as possi-

ble. For piping requirelnents over 50 ft of total ran, or more

than 25 ft of lift, consult the long line application guidelines, or

contact your local representative. For multi-split systems, the

maximum pipe length is 50 ft.

DO NOT BURY MORE THAN 36 IN. OF REFRIGER-

ANT PIPE IN THE GROUND. If any section of pipe is

buried, there must be a 6-in. vertical rise to the valve con-

nections on the outdoor unit. Ifmore than the recolrnnended

length is buried, refiigerant may mi_ate to the cooler, bur-

ied section during extended periods of unit shutdown, caus-

ing reffigermlt slugging and possible colnpressor dmnage at

start-up.

FAN COIL

UNiT BOTTOM

BACK VIEW

TOP HOLES I

TOP VIEW

Fig. 5 -- Bracket Mounting

Use the following instructions to connect piping.

1. Install insulation. Insulate all refrigerant lines on

heat pumps and multi-split systems to prevent con-

densation. It is extremely important that all refrigerant

lines and the AccuRater,¢<)metering device be insulated

on heat pumps. On cooling only units, the liquid line

may be left uninsulated. Use any acceptable heat resis-

tant, closed-celt foam insulation (minimum 3/s-in. wall

thickaless). When insulating piping, cap the ends and

slide insulation over the piping. Insulation can also be

cut and placed over piping.

2. Run the liquid and gas refrigerant piping.

a. Run pipes as directly as possible, and avoid any

unnecessary turns and bends.

b. Suspend the refrigerant pipes so that the insula-

tion is not damaged and vibrations are not

transmitted to the structure.

c. Leave slack in the refrigerant pipe between the

structure and the unit to absorb vibrations.

d. Install the factory-supplied flare connection and

AccuRater metering device in the liquid line at the

fan coil unit (Fig. 8). Make sure the arrow on the

metering device body points AWAY FROM the

fan coil unit. Use Table 7 to verily that the correct

piston for your system has been shipped with the

unit.

NOTE: No AccuRater device is installed on

multi-split systems. Multi-split systems have a

TXV (thermostatic expansion valve) in the con-

densing unit for refrigerant metering and

control.

e. On heat pump installations, install the factory-

supplied piston in the AccuRater metering device

located in the service valve on the outdoor unit

(Fig. 9). Make sure the Teflon seal on the piston

faces toward the outdoor unit. Use Table 7 to ver-

ify the correct piston for your system has been

shipped with the unit. Refer to the outdoor installa-

tion instructions for more details.

f. Install a field-supplied liquid line filter drier near

the outdoor unit. On heat pump systems, a bi-flow

filter drier must be used. DO NOT install a filter

drier in multi-split systems.

3. Insulate and caulk the wall openings to reduce air infil-

tration and refrigerant pipe vibrations on the structure.

4. Evacuate the piping, if necessary. If either the refriger-

ant piping or the indoor coil is exposed to atmospheric

conditions, it must be evacuated to 1000 microns to

eliminate contamination and moisture in the system.

FAN COIL _ _r..-..._.L...--_

UNIT -..........._l_'_",,._____.J _ ) _/'_ _]

NOTE: Use either point "A" or point "B."

Fig. 6 -- Wall Hole Location for Rear Piping

ON SEAL_

BODY (WITH ORIFICE) SCREEN CAP

NOTE: Arrow on AccuRater body points in free flow direction away

from the coil.

Fig. 8 -- AccuRater Metering Device in Liquid Line

(Bypass Type Components); Cooling

• ° ° ," ,

_ _ _I-LOWER

WALLSLEEVE-- /

(FACTORY SUPPLIED)

(INDOOR SIDE) [" WALL .I (OUfDOOR SIDE)

Fig. 7 -- Piping Hole

_//SvAERv_ VECE TEFLON SEAL

L====J (W _'T'H_'_)RIFICE) SCREEN CAP

Fig.9 -- AccuRater Metering Device atService

Valve(Bypass Type Components); Heating

Table 5A -- Physical Data -- 38HDC, 538A Condensing Units

UNIT SIZE

NOMINAL CAPACITY (Tons)

OPERATING WEIGHT (Ib)

REFRIGERANT TYPE

Control (Cooling)

Charge (Ib)

OUTDOOR FAN

Rpm

Diameter (in,),,.No. of Blades

Pitch (Degrees)

Motor Hp

Nominal Air Cfm

OUTDOOR COIL

Face Area (sq ft).,.No, of Rows

Finstin.

CONTROLS

High-Pressure (psig)

Cut-in

Cutout

Low-Pressure (psig)

Cut-in

Cutout

Fusible Plug

Control Voltage*

REFRIGERANT LINES

Connection Type

Liquid Line OD (in.)

Vapor Line OD (in.)

Maximum Length (ft)

Maximum Lift Fan Coil (Above Outdoor) (ft)

Maximum Lift Fan Coil (Below Outdoor) (ft)

018 I 024

11/2 2

150 154

R-22

AccuRater_ Piston at Fan Coil Unit

See Table 6

Propeller, Direct Drive

850 I 850

18_.3 18...3

25 27

1/8 1/8

1720 1720

Copper Tube, Aluminum Fin

6.1 ,_1.5 I 6.1 ...2

15 I 15

320 +_20

426 _+ 7

22 _+5

7_+3

210 F

Sweat

3/8 I 3/8

s/8 5/8

200 200

65 65

150 150

*24 v and a minimum of 40 va is provided in the fan coil unit.

Table 5B -- Physical Data -- 38HDL, 538JNX Condensing Units

UNIT SIZE

NOMINAL CAPACITY (Btuh)

UNIT OPERATING WEIGHT (Ib)

REFRIGERANT TYPE

Control

Charge (Ib)

OUTDOOR FAN

Rpm

Diameter (in,),,,No. of Blades

Fan Pitch (Deg)

Motor Hp

Nominal Airflow (cfm)

OUTDOOR COIL

Face Area (sq ft)..,No, of Rows

Fins per inch

CONTROL PRESSURESTAT

Low Pressure

Cut-out (psig)

Cut-in. (psig)

Fusible Plug

REFRIGERANT LINES

Connection Type

Maximum Length (ft)

Maximum Lift (ft) -- Fan Coil (Above Outdoor)

Maximum Lift (ft) -- Fan Coil (Below Outdoor)

018 I 024

18,000 24,000

130 136

R-22

AccuRater_ Piston at Fan Coil Unit

See Table 6

Propeller Type, Direct Drive, Horizontal

850 I 850

18_.3 18...3

25 27

1/8 1/8

1720 1720

Copper Tube, Aluminum Plate Fin

6.1 ...1 I 6.1 ,..1.5

20 I 20

Settings

7_+3

22 _+5

210 F

Sweat

100

Table 5C -- Physical Data -- Multi-Split Condensing Units

UNIT SIZE

NOMINAL CAPACITY (Tons)

OPERATING WEIGHT (Ib)

REFRIGERANT TYPE

Control (Cooling)

Charge (Ib)*

Circuit A

Circuit B

OUTDOOR FAN

Rpm

Diameter (in,),..No. of Blades

Pitch (Degrees)

Motor Hp

Nominal Air Cfm

OUTDOOR COIL

Face Area (sq ft),..No, of Rows

Fins/in.

CONTROLS

High-Pressure (psig)

Cut-in

Cutout

Low-Pressure (psig)

Cut-in

Cutout

Fusible Plug

Control Voltage

REFRIGERANT LINES

Connection Type

Vapor Supply Line Quantity...OD (in,)

Vapor Return Line Quantity,,.OD (in.)

Maximum Length (ft)

Maximum Lift Fan Coil (Above Outdoor) (ft)

Maximum Lift Fan Coil (Below Outdoor) (ft)

EXTERNAL FINISH

O24

159

R-22

TXV in Condensing Unit

See Table 6

Propeller, Direct Drive

850

18...3

1720

Copper Tube, Aluminum Fin

6.1 ...2

LEGEND

TXV- Thermostatic Expansion Valve

*Charge is based on 25 ft of interconnecting line.

320 _+20

426 _+ 7

22_+5

7+_3

210 F

Sweat

2...3/8

2...5/8

301-

Alpine Mist (Beige)

1-Maximum system lift is 30 ft between lowest system component and highest system component.

Table 5D -- Physical Data -- Cooling Only High Wall Fan Coil Units

UNIT SIZE

NOMINAL CAPACITY (Tons)

NOMINAL SIZE (Btuh)

OPERATING WEIGHT (ib)

MOISTURE REMOVAL RATE (Pints/Hr)

FINISH

REFRIGERANT

Control (Cooling)

System Charge Required (Ib)*

INDOOR FAN

Bpm,..Cfm High

Rpm,.,Cfm Medium

Bpm,,.Cfm Low

Motor Watts

Blowers -- No..,,Size (in.)

INDOOR COIL

Face Area (sq ft)

No. of Rows

Finstin,

Circuits

FILTERS

(Quantity) Size (in,)

AIRSWEEP

Horizontal

Vertical

CONTROLS

Remote Controller

Freeze Protection

Auto. Restart

Diagnostics

Timer Mode

Test Mode

Dehumidification Mode

Fan Mode

Control Voltage

REFRIGERANT LINES

Connection Type

Liquid Line OD (in.)

Vapor Line OD (in.)

CONDENSATE DRAIN CONNECTION (in.)

018 024

11/2 2

18,000 24,000

38.5 42.9

5.6 6.3

White

R-22

AccuRater® Metering Device

4.6 I 5.3

Direct Drive Centrifugal

1120.,,550 1470,.,570

1050, ..500 1370, ..466

950...450 1270...417

44 49

2...3.94 x 17.8 2...3.94 x 17.8

Copper Tube, Aluminum Fin

2.56 2.56

2 3

15.9 18.1

2 3

Cleanable

(3) 111/2 x 173/4

Manual

Automatic

Integrated Microprocessor

Wireless

Yes

24-Hour Startup/Shutdown Type

Yes

High/Medium/Low/Auto.

24 v

Male Flare

s/8 I 3/8

5/8 s/8

5/80D, 7/16ID

*Full factory charge shipped in outdoor unit. Charge shown is for smallest system combination and is determined based on 25 ft of line.

Table 5E -- Physical Data -- Outdoor Heat Pump Units

UNIT SIZE

NOMINAL CAPACITY (Tons)

OPERATING WEIGHT (Ib)

REFRIGERANT TYPE

Control (Cooling)

Control (Heating)

Charge (Ib)*

CRANKCASE HEATER (Watts)

OUTDOOR FAN

Rpm

Diameter (in,),..No. of Blades

Pitch (Degrees)

Motor Hp

Nominal Air Cfm

OUTDOOR COIL

Face Area (sq ft),..No, of Coils

Fins/in.

CONTROLS

High-Pressure (psig)

Cutout

Cut-in

Liquid Line Low-Pressure (psig)

Cutout

Cut-in

Fusible Plug

Defrost Method

Accumulator

Control Voltagel-

REFRIGERANT LINES

Connection Type

Liquid Line OD (in,)

Vapor Line OD (in.)

Maximum Length (ft)

Maximum Lift (Fan Coil Above) (ft)

Maximum Lift (Fan Coil Below) (ft)

018 024

11/2 2

154 167

R-22

AccuRater® Piston at Fan Coil Unit

AccuRater Piston at Outdoor Unit

See Table 6

19 I 19

Propeller, Direct Drive

850 850

18_.3 18_.3

25 27

l& 1/s

1720 1720

Copper Tube, Aluminum Fin

6.1 ...1.5 I 6.1 ...2

15 I 15

320 _+20

426 _+ 7

7_+3

22_+5

210 F

Time and Temperature Defrost

Yes

24 v

Sweat--Suction; Flare--Liquid

3/8 s/s

s/8 5/s

200 200

65 65

150 150

*These units are shipped with a holding charge only,

1-A 24-v transformer is provided in the fan coil unit; size 018 and 024 units have their own transformers.

Table 5F -- Physical Data -- Heat Pump High Wall Fan Coil Units

018 024

11/2 2

18,000 24,000

38.5 42.9

5.6 6.3

White

R-22

AccuRater® Piston in Fan Coil

AccuRater Piston in Outdoor Unit

See Table 6

Direct Drive Centrifugal

1250/530 1470/570

1150/490 1400/466

1050/430 1300/447

42.3 49

2...3.94 x 17.8 2...3.94 x 17.8

Copper Tube, Aluminum Fin

2.56 2.56

2 3

15.9 18.1

2 3

Cleanable

2,.,111/2 x 173/4

UNIT SIZE

NOMINAL CAPACITY (Tons)

NOMINAL SIZE (Btuh)

OPERATING WEIGHT (Ib)

MOISTURE REMOVAL RATE (Pints/Hr)

FINISH

REFRIGERANT

Control (Cooling)

Control (Heating)

Charge Required (Ib)

INDOOR FAN

Rpm/Cfm High

Rpm/Cfm Medium

Rpm/Cfm Low

Motor Watts

Blowers Quantity..,Size (in.)

INDOOR COIL

Face Area (sq ft)

No. of Rows

Fins/in.

Circuits

FILTERS

Quantity,..Size (in,)

AIBSWEEP

Horizontal

Vertical

CONTROLS

Remote Controller Options

Diagnostics

Defrost Method

Timer Mode

Warm Start Feature

Test Mode

Freeze Protection

Dehumidification

Auto. Changeover

Fan Mode

Auto Restart

Control Voltage

REFRIGERANT LINES

Connection Type

Liquid Line OD (in,)

Vapor Line OD (in.)

CONDENSATE DRAIN CONNECTION (in,)

Manual

Automatic

Integrated Microprocessor

Wireless

Yes

Demand Defrost

Yes

High/Medium/Low/Auto.

Yes

24 v (provided)

Flare

3/8

s/8

5/80D, 7/16ID

*Outdoor unit is shipped with a holding charge. The amount of the charge is determined based on 25 ft of line.

Table 6 -- Refrigerant Charge

HIGH WALL I ADDED CHARGE*

SYSTEM INDOOR UNIT OUTDOOR UNIT

(Btuh) (over 50 ft tubing)

Coolin_ Only

18,000

24,000

40QNB018

619ENX018

40QNB024

619ENX024

38HDC018

538ANX

38HDL018

538JNX

38HDLO18

538JNX

38HDC024

538ANX

38HDLO24

538JNX

I OPERATING CHARGE (Ib)* I

FACTORY CHARGE (25-50 ft tubing)

3.6

Operating Charge 3.8

3.8

6.01-

4.4

Operating Charge

5.3

Operating Charge

Heat Pumps

2.0 Holding Charge

.58 Oz. For each foot

over 50'

40QNH018 38BK018-3

18,000 619ENX018 538DNX 4.951- .58 Oz. For each foot

40QNH024 38BK024-3 over 50'

24,000 619ENX024 538DNX 2.0 Holding Charge 5.10t

Multi-Split

*Charge amount determined based on 25 ft of line. Check charge for longer lines using super-

heat method. See outdoor unit installation, start-up, and service instructions for system charg-

ing procedures. No additional charge is needed from 25 to 50 ft of line length.

1-Total system charge.

Table 7 -- Piston Requirements for Elevation Differences

INDOOR COIL BELOW OUTDOOR UNIT

38HDC* 38HDL018* 38HDL024* 38BK

Elevation 538ANX 538JNX018 538JNX024 538DNX

Difference Indoor Piston Indoor Piston Indoor Piston Indoor Piston Outdoor Piston

Size 018/024 Size 018/024 Size 024 Size 018/024 Size 018/024

Standard 49/57 49/53 57 51/59 47/52

26- 50' 45/53 45/49 53 47/55 47/52

51- 75' 43/52 43/47 52 45/53 51/57

76-100' 42/49 N/A N/A 43/52 53/59

101-125' 40/47 N/A N/A 42/49 55/61

126-150' 39/47 N/A N/A 41/49 57/62

INDOOR COIL ABOVE OUTDOOR UNIT

38HDC* 38HDL018* 38HDL024* 38BK

Elevation 538ANX 538JNX018 538JNX024 538DNX

Difference Indoor Piston Indoor Piston Indoor Piston Indoor Piston Outdoor Piston

Size 018/024 Size 018/024 Size 024 Size 018/024 Size 018/024

Standard 49/57 49/53 57 51/59 47/52

26-50' 53/61 53/57 61 55/63 47/52

*No piston in outdoor unit.

NOTE: The multi-split systems do not use the AccuRater'_" device. They have a TXV in the

condensing unit for refrigerant metering and control.

Step 5 -- Connect Condensate Drain Line -- Ob-

serve all local sanitary codes when installing condensate

drains.

1. Connect the drain line by inserting a 5/8-in. (inside

diameter) rigid PVC pipe over the drain connection.

Refer to Fig. 10.

Step 6 -- Make Electrical Connections -- Be sure

field wiring complies with local building codes and NEC, and

unit voltage is within limits shown in Table 8. Refer to Table 9

for units with electric heat.

Contact local power company to correct hnproper line

vohage.

The drain tube extension must be securely Ihstened to the

condensate drain. Failure to do so can result in condensate

water dripping onto the floor.

2. To ensure remllar flow of condensate water, the drain

pipe should be pitched toward an open drain or sump

at a downward slope of at least l/4-in, per foot. Refer to

Fig. 11.

I IMPORTANT: Be sure the drain piping has no slack

which might form a trap. Do not insert a trap in the drain

line; the drain is internally trapped.

3. Insulate the condensate drain lines that are located in

or above an occupied area with a condensate proof

material such as polyurethane or neoprene.

INDOOR

UNIT

PIPING

DRAIN CONNECTION

Fig. 10 -- Drain Connection

(Right Side Shown When Facing Fan Coil Unit)

To avoid personal injury or damage to unit, do not make

electrical connections until all power sources are shut

do,a_, locked out, and tagged off Failure to do so could

resuh in personal injury or unit damage.

Operation of unit on hnproper line voltage constitutes abuse

and could affect warranty. Refer to Table 8 for permissible

operating limits. Do not install unit in system where voltage

may fluctuate above or below permissible limits.

NOTE: Use type NM power cable only (per NEC; provided for

fro1coil units only) between disconnect switch midunit.

NOTE: Install the branch circuit disconnect (field supplied) per

NEC of adequate size to handle the unit's starting cunent.

Locate the disconnect within sight liom and readily accessible

fioln the unit, per Section 440-14 of NEC. Some codes allow

the indoor unit to share a disconnect with the outdoor unit if the

disconnect can be bcked; check local code before installing in

this manner. Tomake electrical connections:

1. Remove the screws holding the front cover of the ihn

coil unit, and remove the front cover. Save the screws

and screw covers l\_r reinstatlation.

2. Remove the control box strain relief clamp (see

Fig. 12).

3. Remove any factory test leads still connected to the

power tenninat box. These leads (if applicable) are

for factory testing only and cannot be used for power

connections.

INCORRECT INCORRECT INCORRECT CORRECT

"/777

UNIT

Fig. 11 -- Drainage System (Rear Piping Shown)

_WALL

DRAIN

'_----- PIPING

LABEL CAUTION

- SCREW

_ SFRAIN

RELIEF

CLAMP

NOTE: This shows item locations only. Front cover of fan coil unit

must be removed to access terminal boards.

Fig. 12 -- Fan Coil Unit Wiring Preparation

4. Route the factory-supplied ground and power wires

from terminal block 1 (TB1) to the field-supplied

disconnect switch.

According to NEC and most local codes, the unit must have

an uninterrupted, unbroken mou_d to minimize personal

injury if an electrical thult should occur. The _ound may

consist of electrical wire or metal conduit when installed in

accordance with existing electrical codes. Failure to follow

this warning could result in an electric shock, tire, or death.

Route the factory-supplied line power leads (see

Fig. 14) from the field-supplied, indoor unit disconnect

to the tan coil unit TB1 (see Fig. 13 and 14). Run the

wire through the strain relief on the control box (see

Fig. 12). When routing wire in the fan coil unit, keep

the wire away tiom refrigerant and condensate piping

and any sharp edges on the unit.

Do not short circuit the indoor unit's transformer it is

l'used. The transformer can be short circuited by connecting

the wrong wires or by touching a live wire to the side of a

grounded control box.

208/230 VOLT F-

SINGLE-PHASE CONN.J

INDOORoTOooNNECTL

FAN COIL UNITS

LEGEND

CONN -- Connection

EQUIP GND -- Equipment Ground

TB -- Terminal Block

TBI

EQUIP GND

Fig. 13 -- Line Power Connections

TERMINAL BLOCK

fiB+) CONNECTION

CORD

Fig. 14- High Voltage Connections

Table 8 -- Electrical Data

INDOOR

UNIT

Cooling 018

Only 024

Heat 018

Pump 024

V(Single-Ph,

60 Hz)

2081230

OPERATING VOLTAGE*

Max Min

253 187

FAN MAX FUSE

WATTS MCA OR HACR TYPE

LRA FLA CKT BKR AMPS

3.2 0.53 94 10.9 15

LEGEND *Permissible limits of the voltage range at which unit will operate

FLA -- Full Load Amps

HACR -- Heating, Air Conditioning, and Refrigeration

LRA -- Locked Rotor Amps

MCA -- Minimum Circuit Amps per NEC Section 430-24

NEC -- National Electrical Code

satisfactorily.

Table 9 -- Electric Heater Data

INDOOR UNIT

018

024

LEGEND

AWG -- American Wire Gage

VOLTS-Ph (60 Hz) INPUT AMPS kW AT 230 V MIN WIRE SIZE (AWG)

230-1 7.8 1.8 14

Step 7 iMake Connections to the Outdoor

Unit

COOLING ONLY SYSTEMS To connect the outdoor unit

to the tan coil unit so the system will operate correctly:

Route 2 field-supplied wires of 18-gage AWG (American

Wire Gage) therlnostat cable between the low voltage terlninal

block of the tan coil TB-2 and the outdoor unit's low voltage

terlninat block. Connect the wires between terlninals C and xA

HEAT PUMP SYSTEMS To connect the heat pump unit

to the tZancoil unit so the system will operate correctly:

Route 5 field-supplied wires of 18-gage AWG (American

Wire Gage) therlnostat cable between the low voltage terminal

block of the tan coil TB-2 and the outdoor unit's low voltage

terlninal block. Connect the wires between terlninals R, C, Y,

G, andO.

Route the factory-supplied thermistor cord fiom the low

voltage terminal board in the control box of the fan coil unit

TB-3 to the outdoor unit's low voltage terminal block. Route

the wire carefully so that it will not be damaged.

IIMPORTANT: DO NOT RUN THE THERMISTOR

CABLE 1N THE SAME CONDUIT AS THE POWER

WIRING.

Step 8 iInstall Fan Coil Unit Onto Mounting

Bracket

1. Hook the fan coil unit onto the top of the mounting

bracket. See Fig. 15.

2. Snap the fan coil unit onto the mounting bracket as

shown in Fig. 15.

I IMPORTANT: An audible snapping sound will be

heard as the hook on the unit is secured into the hole on

the mounting bracket. Be sure unit is correctly mounted.

START-UP

Complete the following checks and the Start-Up Checklist

on page CL-1 before system start-up. Refer to the outdoor unit

installation, start-up and service instructions for system start-up

procedures and retiigerant charNng methods.

1. Check the condensate drainage system.

Add water to check the drainage flow. If the water

does not flow regularly, check the pipe slope or see if

there are any pipe restrictions.

2. Make sure that all wiring connections are correct and

tight.

3. Make sure that all barriers, covers, and panels are in

place.

4. Ensure that the filters have been installed and that the

discharge louvers are correctly positioned.

Never operate unit without a filter. Damage to the unit or

personal injury may result.

5. If the unit is equipped with a crankcase heater, ener-

gize it a minilnum of 24 hours before starting the unit.

To energize the crankcase heater only set the unit in off

mode and close the outdoor unit disconnect.

6. Fully backseat (open) the liquid and vapor tube sewice

valve s.

7. The unit is shipped with valve stems frontseated and

caps factory installed. Replace the stem caps after sys-

tem is opened to refrigerant flow (backseated).

Replace the caps finger tight.

8. With the remote controller, turn on the unit and operate

it in each mode (as applicable) for 15 minutes to test

for proper operation. Do not operate in cooling mode if

the outdoor temperature is below 55 F or 0 ° F (multi-

split) unless the unit is equipped with a low ambient

control or winter start kit (multi-split). Do not operate

in heating mode (heat pump systems only) if the out-

door temperature is above 75 F.

9. Test for proper refrigerant charge using the superheat

method or subcooling method t\_r multi-split.

10. Explain basic system operation to the o,amer.

MOUNTING

BRACKET

TOP

HOOK HOLE

•,A- "R

,j'_ •

•._,|

" 1

e*. _11

f l Ii

HOOK

LOCATIONS

--101/4"

r--Z

LlO 1/4".---._

Fig. 15 -- Mounting Unit to Bracket

ControlSystem --The indoor unit is equipped with a

microprocessor control which operates the system. This control

is located in the control box of the fan coil unit, with ther-

mistors located in the thn coil inlet and on the indoor coil. The

heat pump fan coil units also have thermistors on the outdoor

coil and in the outdoor air inlet. These thermistors monitor sys-

tem operation and control the operating mode. To change set-

tings or operation modes, use the fiactory-supplied inliared

wireless remote controller. This controller allows the fan coil

unit to operate fiom within the same room without any wire

connections to the unit.

WIRELESS REMOTE CONTROLLERS A wireless re-

mote controller is supplied for system operation of all hi_l wall

units. Each battery-operated wireless (inliared) remote control-

ler may be used to control more than one unit. The wireless

relnote controller has a maximum range of 20 feet. The fan coil

unit is equipped with an emeNency switch which allows oper-

ation if the remote contxoller malfunctions or is misplaced.

Because the controller uses inliared communication, all of the

following must be true for the controller to work properly:

1. The power to the tan coil unit must be on.

2. The batteries in the controller must be good.

3. The controller must be within range of and pointed

directly at the thn coil unit.

4. The tan coil unit's 3-position switch must be set in the

remote position.

The remote controller includes a wall-mounted bracket. To

install the bracket, attach it to the wall as shown in Fig. 16

using double-sided tape included in the remote controller

assembly. Install the thctory-supplied batteries into the remote

controller per To hlstatl or Replace Remote Controller Batter-

ies section on page 17, and place the controller into the bracket

so that it is ready to use.

After Extended Shutdowns -- If the system has been

turned off tbr more than 12 hours, turn on the indoor and

outdoor unit disconnect switches to supply power to the system

for 12 hours BEFORE starting the system.

Seasonal Changeovers--When changing the heat

pump system ftom cooling to heating or heating to cooling, or

before starting cooling only system after it has been out of use

for the winter season, perform the following steps BEFORE

starting the system:

1. Inspect and clean the outdoor unit, particularly the

coil.

2. Clean or replace the air filters in the indoor unit.

3. Clean the indoor unit drain pan and drain pipe, and

remove any obstructions.

4. Turn on the indoor and outdoor unit disconnect

switches to supply power to the system 12 hours

before starting the system.

ToTurnthe UnitOn and Off-- To turn the unit on,

press the ON/OFF button (see Fig. 17). The unit will start. To

stop unit operation, press the ON/OFF button again. The unit

wilt stop. Refer to the Owner's Manual enclosed with the tan

coil unit tbr full remote control operating details.

Adjusting Airflow- The airflow direction may be ad-

justed up and down using the remote controller tlap button, and

ftom side to side by manually moving the vents. For cooling

only units and heat pump units when in the cooling mode, set

the louvers to dischaige straight out (parallel to the floor) (see

Fig. 18). For the heat pump units operating in heating 1node, it

is recommended that the air discharge louvers be set to dis-

charge vertically (see Fig. 18).

20'

BRACKET

Fig. 16 -- Mounting Remote Controller Bracket

FLAP_

2:00

Ae® ®@

ON/OFF SET BACK

Fig. 17 -- Remote Controller

COOLING - DIRECT

LOUVERS SO AIR

CLOSE._' CLOSe/

START COOL* /HEAT*

START HEATING -DIRECT

LOUVERS SO AIR

BLOWS DOWN

VERTICAL

_ISCNARGE)

BLOWS STRAIGHT _

OUT HORIZONTAL

DISCHARGE)

SWINGtsT_yRANGE SWING 6e_ lp

RANGE

START '

COOL HEAT

*Potential range.

1-Desirable range.

NOTE: The unit is equipped with manual air vents that direct the air

from side to side. Up and down louver motion can be selected using

the remote controller. For maximum comfort, set louvers within the

swing range. See the Adjusting Airflow section on this page for more

information.

Fig. 18 -- Louver Adjustments

The swing range shown in Fig. 18is the range that provides

maxilnum occupant comfort in each mode. It is recolmnended

that the louvers be positioned within this range (using the

relnote controller).

NOTE: The full swing range for the mode selected will auto-

matically be used if auto. tan mode is selected.

Operating Mode Memory -- After the system is turned

offor after a power failure, the system relnains in the last oper-

ating mode selected. When the system is turned back on, or

when power is automatically restored, operation continues in

the same operating 1node as when the power shut down.

Automatic Operation (Auto) Mode-- If auto mode

is selected, the system automatically switches the operating

mode from heating (heat pump system only) to cooling, or

fiom cooling to heating (heat pmnp system only) depending on

the selected telnperature.

NOTE: Between the cooling cycle and the heating cycle there

is a neutral zone of approximately 2 F above and 2 F below the

selected temperature, when only the tanis operating.

Operating Fault Diagnosis -- The system includes an

automatic diagnosis feature that activates uMer difficuh or

unacceptable operating conditions. It"such conditions occur,

the system stops automatically, the operating fauh signal

appears (geen "UNIT ON" light on the fiont of the tan coil

unit flashes), and an analysis of the system operating coMi-

tions is initiated. If the system does not start again, the _een

"UNIT ON" light will flash an error code.

Microprocessor Control Operation-- This system

is controlled by a microprocessor designed to give optilnum

levels of comfort and operating ei_ciency. The control is locat-

ed in the indoor unit. To operate the unit, the thctory-supplied

relnote controller is required.

There are 9(cooling only) or 12 (heat pump) operating

modes (including the offmode) for the unit. Each ll_lodeoper-

ates as follows:

• Off Mode When the unit is in the Offlnode, all func-

tions (compressor, outdoor tan, indoor fan, and air

sweep) are oft; except the reversing valve (heat pump

only), which will stay energized if the unit was last oper-

ated in the Cooling mode.

• Air Circulation Mode (Fan Operation Only) When

Air Circulation mode is selected, the indoor fan wilt

operate continuously at the selected speed (high,

medium, low, or Auto.). If the Auto. mode is selected,

the indoor tan will operate at low speed. The compressor

and outdoor fan are off. The reversing valve (heat pump

only) will remain in the last operating mode.

• Cooling Mode When the Cooling mode is selected,

the indoor tan will operate continuously at the selected

speed if the speed is high, medium, or low. If the indoor

fan is in Auto. mode, the tim will change operating

speeds depending on the difference between the room

temperature and the set point. The reversing valve (heat

pmnp only) will be energized. The compressor cannot

run for 3 minutes from the time the system starts up or

for 3 minutes from the time the compressor last operated.

When the temperature of the room is equal to or _eater

than the selected telnperature, the colnpressor and out-

door fan will operate until the room temperature is 2 F

below the set point, and then shut ofl, When the room

temperature is less than the selected telnperature, the

compressor and outdoor tan remain oft'. Indoor Pan runs

according to selected mode.

• Dehumidification Mode When the Dehumidification

mode is selected the indoor tan will operate at a speed

and setting selected by the microprocessor. There is no

user interface with this mode.

• Heat Pump Heating Mode (Heat Pump Systems Only)

When the Heat Pump mode is selected, the indoor tan

will operate at the selected speed if the speed is high,

medium, or low, unless overridden by the coil tempera-

ture (to prevent cold drafts). If the indoor fan is in Auto.

mode, the tan will change operating speeds depending on

the difference between the room temperature, the set

point, and the coil telnperature. The reversing valve will

be deenergized. The compressor cannot run for 3 minutes

fiom the time the system starts up or for 3 minutes fiom

the time it last operated. When the telnperature of the

room is 8 F below the selected telnperature, the unit wilt

operate in Heat Pmnp mode until the telnperature is 6 F

above the selected telnperature, or the compressor runs

for 40 minutes (whichever comes first). If the tempera-

ture of the room is less than 7 F below or equal to the

selected telnperature, the unit operates in Heat Pmnp

mode until the selected set point telnperature plus 2 F is

reached.

• Electric Heat in Heat Pump Heating Mode Supple-

mental electric heat is enabled when the outside air ther-

mistor located in the outdoor unit is below 40 F and the

room telnperature therlnistor is equal to or less than 6 F

below set point. Electric heat will remain on until 2 F

above set point, then will turn off. Fan operation will be

the same as described previously in the heat pmnp heat-

ing mode.

NOTE: Electric heat control cannot be overridden.

• Demand Defrost Mode (Heat Pump Systems Only)

This unit uses a demand defrost system to remove fiost

froln the outdoor coil during heating operation. The

indoor and outdoor fans are shut off during Defrost

mode. See Fig. 19. For high wall heat pump units, the

electric heat is OFF during Defrost mode.

• Set Back The Set Back mode timer turns the unit off

when the timer reaches zero minutes. The durations that

can be selected are 1, 2, 3 or 7 hours. After the initial

30 minutes, the user set point shifts approximately 1° F

warmer. This sequence repeats itself every 40 minutes up

to a total of 150 minutes. When Set Back mode is

enabled, the display on the remote controller is dimmed.

•On/Off Timer Mode The on!off timer will turn the

unit on or offat a user selectable on and offtime (this is

one time event only). The unit will start in the same

mode and at the same selected temperature as when the

system shut off. If the rooln temperature is not within

approximately 5 F of the set point 40 minutes before

start-up, the unit runs before the user selected on time is

reached to achieve the set point temperature at start-up.

• Automatic Operation Mode for Cooling Only Systems

The unit samples the air in the room. Based on the

room temperature, the unit selects one of the t\_ltowing

modes:

1. Cooling Mode If the room telnperature is more than

82 F with a preset telnperature of 79 F.

2. Dry Mode If the room temperature is more than

75 F and less than 82 F with a preset temperature of

77 F.

3. Fan Only Mode If the room temperature is less than

75 F.

• Automatic Operation Mode for Heat Pump Systems

The operation mode will be determined after 20 sec-

onds of room monitoring (to determine the room temper-

ature and the outdoor air temperature).

• Test Mode The test mode can be selected by setting

the slide switch on the tan coil unit to TEST position.

The slide switch is located on the front of the unit as

shown in Fig. 20. The fan coil unit will start immediately

(there is no compressor time delay when using Test

mode) in Cooling mode with an infinitely low set point.

TheindoortZanspeedwillbeatthehighsetting,andthe

swinglouverswillbeon(movingupanddo,am).

NOTE:Theunitcmmotbecontrolledbytheremotecontroller

untiltheslideswitchisreturnedtotheREMOTEposition.

•Emergency Mode This mode is only to be used if the

remote controller is lost, damaged, or the batteries are

dischaNed. To initiate Emergency mode, manually move

the slide switch on the fan coil unit to the EMER position

(Fig. 20). The unit is automatically operated in Cooling

or Heating mode according to room telnperature. Emer-

gency operation settings are as follows:

1. Operation mode: AUTO.

2. Fan Speed: AUTO.

3. Cooling set point: 77 F

4. Timer Mode: Continuous

NOTE: The unit cannot be controlled by the remote controller

until the slide switch is returned to the REMOTE position.

O,_

C2_

DEFROST REGION THREE

DEFROST REGION TWO

(MINIMUM UNIT RUNTIME

= 6 HOURS*)

ADJUSTS IF LONG

DEFROST CYCLE

(MORE THAN

6 MINUTES)

DEFROST REGION ONE

(MINIMUM UNIT RUN TIME

= 50 MIN.*)

(NO DEFROST OPERATION)

-10

-10 0 10 20 30 40

OUTDOOR AIR TEMPERATURE (F)

*A defrost will be initiated after 30 minutes of compressor run time if the outdoor coil temperature is less than -4 ° E

ADJUSTS IF SHORT

(LESS THAN

3 MINUTES)

Fig. 19 -- Electronic Control Defrost Regions Map

TE ST-J _ LR EMOT E

EMER.

EMER -- Emergency Mode

Fig. 20 -- Slide Switch

CLEANING AND MAINTENANCE

To avoid the possibility of electric shock, before performing

aaly cleaning and maintenance operations, always turn off

power to the system by pressing the ON/OFF button on the

remote controller. Turn off the outdoor disconnect switch

located near the outdoor unit. It'the indoor unit is on a sepa-

rate switch, be sure it is also disconnected.

For proper system operation, perform the cleaning and

maintenance operations listed in Table 10.

Lubrication -- The indoor-tan automatic air sweep motor,

and the outdoor-tan motor are thctory lubricated and require no

oiling.

To Install or Replace Remote Controller

Batteries

Do not drop the remote controller daanage to the device

may result. Avoid getting the controller wet.

NOTE: Betbre replacing the batteries, note that the remote con-

troller signal can be affected if electronic fluorescent lights are

installed nearby. The batteries may not need to be replaced. If

you suspect this is the problem, consult your distributoi:

Batteries should be replaced once a year. Use 2 batteries

(1.5 v, de-type, AAA alkaline batteries). Never use old or

rechaNed batteries together with new ones.

Toreplace batteries:

1. Slide the battery cover off from the back of the remote

controller. See Fig. 21.

2. Insert the 2 batteries in accordance with the markings

on the remote controller, so that the poles are correct

(+ and 3.

3. Replace the cover securely.

4. Press the _ button on the fiont of the remote usin_

an instrnmen_screwdriver or similar small, pointed

tool.

Replace the remote controller batteries when the remote

controller function becomes irregular, or the system no longer

responds to commmlds given close to the unit.

When shutting down the system for an extended period of

time, it is advisable to remove the batteries from the remote

controller.

Consult your distributor if any other equipment is turned on

or shows signs of disrupted operation if you use the wireless re-

mote controller, or if the system is mined on or shows signs of

disrupted operation when the remote controller of aaly other

equipment is used.

To Set the Current Time

1. Press the [_ button (located on the front of the

remote controller; see Fig. 22) with an instrument

screwdriver or similar small, pointed tool, and the cur-

rent time indication symbol flashes.

Note that the controller comes preset from the factory

set for 6:00 a.m.

2. Set the current time with the hour and minute buttons

on the front of the remote controller (see Fig. 21) while

the current time indication is flashing. Note that a.m.

and p.m. are also indicated as the times are scrolled

through.

3. When you reach the current time, press [-_ again.

The flashing will stop and the current time will be

reset to the new setting.

To Remove and Clean or Replace Air Filters

Operating your system with dirty air filters may damage the

indoor unit and can also cause reduced cooling perfur-

mance, intermittent system operation, frost build-up on the

indoor coil, and blown fuses. Inspect and clean or replace

the air filters momhl3'.

TO REMOVE AIR FILTERS

1. Open the tan coil unit front panel (lift). See Fig. 23.

2. Pull the tilters down to remove.

Table 10 -- Cleaning

TASK ]

INDOOR UNIT

Clean Air Filters

Clean Drain Pipe

Clean Condensate Drain Pan

Replace Batteries in the Remote Controller

Clean Indoor Unit Front Panel

OUTDOOR UNIT

Clean the Fins From Outside

Open the Unit and Clean Fins Inside

Remove Dust From Electrical Parts

Check Electrical Connections are Tight

Clean Outdoor Fan

Check that Outdoor Fan Assembly is Tight

and Maintenance Schedule

MONTHLYI OUABTEBLYI YEARLY

Clean Drain Pan X

NOTE: Maintenance procedures for the outdoor unit are in the outdoor unit installation instructions.

TO CLEAN OR REPLACE FILTERS Filters should be

vacuumed and ,a_ashedwith warm water (see Fig. 23). Shake

the tilter to remove any excess ,a_atei; dry it thoroughly, and

replace it by sliding the tilter behind fiont gille until the tilter

snaps in place.

If the filter has bemm to break down or is tom, it needs to

be replaced. Replacement tilters are available through your

distributor.

To Clean Indoor Unit Front Panel- If the fiont pan-

el of the unit becomes dirty or smudged, wipe the outside of the

tlront panel with a soft dry cloth. If necessary, use a mild liquid

deteIgent and wipe off carefully with a dry cloth.

When cleaning the fiont panel, NEVER use water hotter

than 105 F, and DO NOT pour water onto the tan coil unit.

Do not use abrasive or petroleum-based cleaners dam-

age to unit appearance will result.

!e_e

REMOVECOVER INSERT NEW BATTERIES

NOTE: Be sure to insert new batteries correctly (as shown),

Fig. 21 -- Installing or Replacing Batteries

To Clean Indoor Coil -- To clean the coil, remove the

indoor unit front panel, and vacuum the coil fins. Use care not

to bend or dmnage fins.

To Clean Outdoor Coil (Outdoor Unit)

Some metal parts and sharp fins of unit coil can cause per-

sonal injury during cleaning. Clean coil carefully.

To clean the outdoor coil:

1. Remove any dirt or obstruction from the discharge

opening.

2. Use a garden hose to spray water on the coil. Debris

that collects between coil fins inhibits heat transfer

direct the water spray between coil fins to flush out

debris.

Cleaning Condensate Drains- Clean all drains and

drain pans at the start of each cooling season. Check the flow

by pouring water into the drain.

_T TA

_o o

PRESS RST /

PRESS

FRONT VIEW

HOUR

BUTTON_

PRESS TA ---....MINUTE

BUTTON

FRONT VIEW

Fig. 22 -- Setting The Current Time

REMOVE FILTER

NOTE: DO NOT lift grille past its stop point.

VACUUM CLEAN

Fig. 23 -- Air Filter Maintenance

RINSE WITH WATER

SERVICE

When servicing unit, turn off all electric power to unit to

avoid shock hazard or injury tiom rotating parts.

Do not vent refrigerant to atmosphere when servicing unit.

Recover reliigerant during system repair or unit relnoval.

Diagnostic Codes -- This unit is equipped with a micro-

processor control that continuously monitors the unit's opera-

tion. If an operational fault is detected, a fault is indicated by

the flashing green "UNIT ON" light on the tiont of the t'mlcoil

unit. The control wilt continue to monitor the unit and, if the

coMitions that cause the thult are cleared, the unit wilt return to

normal operation. If the thult code is present for 5 cycles of the

unit, the unit will be locked out and the alarm indicated by the

flashing green "UNIT ON" light on the front of the tan coil

unit.

To access the red LED iMicator light, remove the tiont cov-

er of the unit by relnoving the 3 screws holding it in place.

If the red LED indicator light continuously flashes on tbr

one secoM, then off for one secoM, the control is lhnctioning

properly. Table 11 lists the number of quick flashes and the

associated thult. If the system does not operate, and the LED

indicator does not flash, either the power to the control board is

oil; or the control board has tailed.

Table 11 -- System Fault Codes

NO. OF QUICK

LED FLASHES

LED -- Light-Emitting Diode

*Heat pump systems only.

NOTE: If the LED light continuously flashes on for one second, then

off for one second, the control is functioning properly and no fault is

present.

SYSTEM FAULT

Room Air Thermistor

Indoor Coil Thermistor

Outdoor Coil Thermistor*

Outdoor Air Thermistor*

Indoor Fan Failure

System Tests- The system tests listed below are per-

formed continuously by the microprocessor. If a fault is indi-

cated, then the system allows only lhnited operation until the

probleln is resolved. If the problem resolves itsel£ then the

code is cleared and operation resumes.

THERMISTOR TESTS Each thermistor is tested tbr high

limit out of range (shorted coMition) and low limit out of range

(open condition). If the thermistor is out of range, the fault sta-

res indicator comes on mid the green LED flashes the appropri-

ate fault code.

THERMISTORS Proper thermistor location and correct

temperature sensing are ca-iticatto unit operation. Good thennat

contact is also required. Thermistor cable asselnblies are pro-

vided with fro1coil units to run between indoor mid outdoor

units. High-voltage mid thermistor cable assemblies should not

touch each other, and cable runs may be extended up to

200 feet. With the unit running, the thermistor integrity may be

checked by measuring the d.c. voltage across the two ther-

mistor connections. Approximate telnperamre is iMicated in

Table 12.

System Safeties and Interlocks

INDOOR FAN FAILURE If the indoor t'ml rpm shows

greater than 800 rpm for 30 seconds with the tan in the off

mode, then this test indicates ml indoor tan thiture. Also, if the

iMoor tan rpm is greater than 1700 rpm for 30 seconds, then

this test indicates ml indoor tan failure.

COMPRESSOR SHORT-CYCLING PROTECTION There

is a 3-minute time delay between compressor turning off and

taming back on.

INDOOR COIL FREEZE PROTECTION (Cooling or Dehu-

midification Mode Only) If the indoor coil temperature is

less than or equal to 32 F for 10 minutes after the compressor

has started, then the compressor and outdoor tan are mined oil"

The indoor tan continues to run at the user-selected speed until

the indoor coil reaches 44 F. At that time, the colnpressor and

outdoor fan will restart.

INDOOR COIL HIGH-TEMPERATURE PROTECTION

(Heat Pump Systems Only) If the indoor coil temperature

is greater than or equal to 135 F, the outdoor fan shuts down.

The outdoor tan will restart automatically when the indoor

coil temperature drops to 120 F.

TROUBLESHOOTING

See Table 13 and Fig. 24-27 to assist in troubleshooting the

fan coil units.

Table 12 -- Thermistor Properties*

MINIMUM NOMINAL MAXIMUM

TEMP MINIMUM NOMINAL MAXIMUM THERMISTOR THERMISTOR THERMISTOR

(F) OHMS OHMS OHMS VOLTS -- DC VOLTS -- DC VOLTS -- DC

-40 303.300 342,700 386,200 4.80 4.82 4.84

-30 211,500 237,276 265,444 4.72 4.75 4.77

-20 149.721 166,689 185,146 4.61 4.65 4.68

-10 107.379 118,776 130,973 4.48 4.52 4.55

0 77,281 85,677 93,867 4.30 4.35 4.40

f056,567 62,617 68,205 4.09 4.16 4.21

20 42,661 46,302 50,129 3.86 3.92 3.98

30 32,043 34,580 37,220 3.59 3.66 3.72

32 30,300 32,550 35,120 3.53 3.60 3.66

40 24,061 26,118 27,960 3.28 3.36 3.43

50 18,650 19,900 21,180 2.99 3.05 3.11

60 14,402 15,312 16,219 2.67 2.73 2.79

70 11,247 11,883 12,518 2.36 2.42 2.47

80 8,820 9,299 9,779 2.06 2.11 2.16

g0 6,846 7,339 7,754 1.76 1.83 1.88

100 5,487 5,829 6,187 1.52 1.57 1.63

110 4,367 4,667 4,976 1.29 1.34 1.40

120 3,502 3,760 4,026 1.09 1.14 1.19

130 2,830 3,051 3,281 0.92 0.97 1.02

140 2,300 2,489 2,687 0.77 0.82 0.87

150 1,880 2,045 2,216 0.65 0.69 0.74

160 1,547 1,688 1,836 0.55 0.59 0.63

170 1,280 1,402 1,531 0.46 0.50 0.53

180 1,065 1,170 1,282 0.39 0.42 0.45

190 890 982 1,078 0.33 0.36 0.39

200 748 828 913 0.28 0.31 0.33

210 631 701 766 0.24 0.26 0.28

212 611 678 751 0.23 0.25 0.28

*Circuit volts = 5 vdc.

Table 13 -- Troubleshooting

PROBLEM POTENTIAL SOURCE ACTION

Circuit breaker has tripped or fuse is blown Reset the circuit breaker or replace the fuse.

Restart fan coil unit operation when power is

Unit Does Not Operate Power failure restored.

Confirm the available voltage.

Clean the air filter.

Check and reset if necessary.

Close window(s) and door(s).

Insufficient Cooling Remove the obstruction.

Change the fan speed

Change to cooling operation or reset temperature

(using remote controller),

Clean the air filter.

Check and reset if necessary.

Insufficient Heating* Close window(s) and door(s).

Remove the obstruction.

Turn off the off timer function.

Unit Stops During Operation

*Heat pump systems only.

Voltage is too low

Air filter is blocked with dust

Temperature is not set properly

Window(s) and/or door(s) are open

Outdoor unit is obstructed

Fan speed is too low

Operation mode is set to fan or auto. mode

Air filter is blocked with dust

Temperature is not set properly

Window(s) and/or door(s) are open

Outdoor unit is obstructed

Off timer is operating

Room temperature has reached the programmed

set point Normal unit operation.

AIRFLOW

'OUTDOOR ';;'

":' UNIT " .: _ ..,

2WIRES

FUSED DISCONNECTf

_ EATHERPROOF

FUSED DISCONNECTt

PERNEC

_ _ "_- 2 WIRES

_ (+) GROUND

_ATER DEV_I_ECE*-"-__

HEAT PUMP ONLY)

(BIFLOW)t

INDICATOR

SIGHT GLASSt

AIRFLOW

THERMISTOR CABLE*

(COOLING ONL_

5 WIRES (HEAT PUMP)t

ACCURATER_

METERINGDEVICE

(INSTALLED AT

UNIT)

CONTROL POWER

PROVIDED INSIDE UNIT

,I-- CONDENSATE

DRAIN LINEt

WIRELESS

CONTROLLER*

TOOPENS*GNT -j/ //

......... _ _>_" ._" _ DRAIN (DO NOT

LEGEND NOTES:

1. All piping must follow standard refrigerant piping techniques.

NEC -- National Electrical Code 2. All wiring must comply with the applicable local and national codes.

"---------- Piping 3. Liquid line need not be insulated. Cooling units only.

.m....._ Line Voltage 4. Wiring and piping shown are general points-of-connection guides only and are

-- 24 V not intended for a specific installation.

5. Insulate condensate drain if installed in a conditioned space.

Thermistor

*Standard.

1-Field supplied.

Fig. 24 -- Typical Piping and Wiring -- High Wall Systems, 18,000 and 24,000 Btuh

AGING --

AS, ASS'Y --

CAP

CLO

COMP --

EMI

FMC

GND

HPS

HTR

IDC Th --

IFM

JEM-A --

LLPS

LPS

ODA Th --

ODC Th --

OFM

LEGEND AND NOTES FOR FIG. 25-27

For the Burn-In Test (short these terminals) OFR -- Outdoor-Fan Relay

Assembly OL -- Overload

Contactor PCB -- Printed Circuit Board

Capacitor RA Th -- Return Air Thermistor

Crankcase Heater RC -- Resistor Capacitor

Compressor Lockout RCV -- Receiver

Connector RVS -- Reversing Valve Solenoid

Compressor SC -- Start Capacitor

Current Transformer SR -- Start Relay

Electromagnetic Interference ST -- Start Thermistor

Fuse Link STM -- Step Motor

Fan Motor Capacitor TB -- Terminal Block

Ground TG -- Time Guard

Home Automation TP -- Thermal Protector

High-Pressure Switch TRAN -- Transformer

Hall (Rpm) Sensor

Heater <_) Terminal (Marked)

Indoor-Coil Temperature Thermistor (_) Terminal (Unmarked)

Indoor-Fan Motor

Japan Electric Manufacturing Q Splice

Industry Association

Relay [] Terminal Block

Liquid Low Pressure Switch Factory Wiring

Low-Pressure Switch Field Control Wiring

Limit Switch

Outdoor-Air Thermistor Field Power Wiring

Outdoor-Coil Thermistor Accessory or Optional Wiring

Outdoor-Fan Motor

1. If any of the original wire furnished must be replaced, it must be

replaced with type 90 C wire or its equivalent.

2. Wire in accordance with National Electrical Code (NEC) and local

codes.

3. The CLO locks out the compressor to prevent short cycling on com-

pressor overloads and safety devices. Before replacing CLO, check

these devices. A minimum one amp turn is required to hold contacts

closed.

4. Thermistor wiring cable 35 feet long provided with unit.

5. IFM, OFM and compressor have internal thermal protectors.

6. Transformer has a 2 amp thermal fuse on the primary side.

Ix3

RELAY CHART

COMPRESSOR K13

OUTDOOR FAN K12

REV. VALVE Kll

THERMISTOR EQUIVALENCE

TEMPERATURE RESISTANCE

°F °C o

95 35 5,500

72 22 11,400

32 0 32,500

ALL THERMISTORS ARE IDENTICAL

018, 024 FANCOIL

CN9

I_ Th_

RA Th

CN7

CNl3

STEP

MOTOR eL)

STEP

MOTOR (R)

Fig. 25 -- Heat Pump Wiring Diagram

4_-

THERMISTOR EQUIVALENCE

TEMPERATURE RESISTANCE

°F °O a

95 35 5,500

72 22 11,400

32 0 32,500

ALL THERMISTORS ARE IDENTICAL

018 024 FANCOIL

BRN CN9

IDC Th

RA Th _

BLK

YEL c

BLU

CN3, I 2 3 4

wHCTN31 CN3O_

L R :A PDOAS

_R_F_ CNll CNlO

DISPLAY PCB AS

AGING SHORT

rTT_l r77_

P1 P2 CNll CNIO

CONTROL PCB

CN12

ASS'Y

JEM A

CNI8

3N13

.o#o'#%

3N14

.o#&%,

FRO

25ov 3,

J3b 3210N4123

___RAED BLUoR G

1FR

3N1

BRN # REDBLK

BARE COPPER

GRN/YEL GRN/YEL

TB2

WHT

RED _y

018, 024OUTDOOR SECTION

COMMON(24VAC)

COMP

EQUIP GND

TO OUTDOOR

UNIT

DISCONNECT

20B/230V

1PH 8OHZ

BRN_

Fig. 26 -- Cooling Only Fan Coil Unit with 38HDC or 538A Cooling Only Outdoor Condensing Unit

TIME GUARO TIMING SEQUENCE

3 SEC_ RUN TIME _ _5 M[N.

T] T2[__

BLACK DENOTES CLOSED CONTACTS

THERMISTOR EQUIVALENCE

TEMPERATURE RESISTANCE

_F _C Q

95 35 5,500

72 22 11,400

32 0 32,500

ALL THERMISTOR5 ARE IDENTICAL

018.024FAN COIL

CNE

IOC Th BRN

RA Th

ON7

GRN/YEL_ ON11 ON10

DISPLAY POD AS

AGING SHORT

FY3] []q3]

Pl P2 CNll CNlO

JEM A

FT_

ON12 ON18

PCB ASS" Y

ON3 1 2 3 4 CND[

ORD

CN31 ON30

WHT__ _

BLK FMC

R_L3Ay POD AS

034

® ®

EMI FILTER

CN13

CN14

CN1

BLK

RED L fTO UNIT DISCONNECT

BARE OOPPER CUSE CABLE PROVIDED)

GRN/YEL GRN/YEL

•

TB2

COMNON(24VAC)

] COMP

C_ YEL_ 018. 024 OUTDOOR SECTION BLK{ I I[I2 I]

BLK BLK_H BLK _ _BLK_ .... TO

YEL YEL .ST _CLO CT C L] OUTDOOR UNIT

BLU /BLU

_BRN__ BLU_ _BLK_/ _ I I I_ OI5CONNECT

OFM _SC EQUIP GND _ J

v- !

O_N_.Y__ ....

_HP5

CONTROL WIRING?

TO OUTDOOR UNIT

BRN

Fig. 27-- Cooling Only Fan Coil Unit with 38HDL or 538J Cooling Only Outdoor Condensing Unit

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations,

PC 111 Catalog No. 534-043 Printed in U.S,A, Form 40QN-6SI Pg 26 9-02 Replaces: 40QN-4SI

CARRIER Air Handler (indoor Blower&evap) Manual L0410227

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