CARRIER Air Handler (indoor Blower&evap) Manual L0602098

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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Page Count: 16

Fan Coil Units

FA4B, FB4B, FC4C

FH4B

NOTE: Read the entire instruction manual be_bre starting the installation.

This symbol =-_indicates a change since the last issue.

SAFETY CONSIDERATIONS

hnproper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may

cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance.

The qualified installer or agency must use _actory-authorized kits or accessories when modifying this product. Refer to the individual instructions

packaged with kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read

these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and National Electrical Code

(NEC) for special requirements.

Recognize safety information. This is the safety-alert symbol Z_X• When you see this symbol on the unit and in instructions manuals, be alert to

the potential for personal injury.

Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER

identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal

injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE

is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

z_x WARNING: Before installing or servicing unit, always turn off all power to unit. There may be more than I disconnect

switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

INTRODUCTION

Models FA4B, FB4B, FC4C, and FH4B are designed for flexibility and can be used for upflow, horizontal, or downflow (kit required and

manufactured and mobile home) applications. These units are designed to meet the low air leak requirements currently in effect. Because of this,

the units need special attention in the condensate pan and drain connection area and when brazing tubing. These units are available for systems

of 18,000 through 60,000 Btuh nominal cooling capacity. Factory authorized electric heater packages are available in sizes 3 through 30kw. See

Product Data Literature for available accessory kits.

HEATER PACKAGES

This unit may or may not be equipped with an electric heater package. For units not eqnipped with factory installed heat, a _actory approved, field

installed UL listed heater package is available from your equipment supplier. See unit rating plate for a list of factory approved heaters. Heaters

that are not factory approved could cause damage which would not be covered under the equipment wan'anty. If_an coil contains a factory installed

heater package, minimum circuit ampacity (MCA) and maximum fuse/breaker may be different than units with a same size field installed accessory

heater. The difference is not an error and is due to calculation difference per UL guidelines.

INSTALLATION

PROCEDURE I--CHECK EQUIPMENT

Unpack unit and move to final location. Remove carton taking care not to damage unit.

Inspect equipment for damage prior to installation. File claim with shipping company if shipment is damaged or incomplete. Locate unit rating

plate which contains proper installation information. Check rating plate to be sure unit matches job specifications.

PROCEDURE 2--MOUNT UNIT

Unit can stand or lie on floor, or hang from ceiling or walh Allow space for wiring, piping, and selwicing unit.

IMPORTANT: When unit is installed over a finished ceiling and/or living area, building codes may require a field-supplied secondary condensate

pan to be installed under the entire unit. Some localities may allow as an alternative, the running of a separate, secondary condensate line. Consult

local codes for additional restrictions or precautions.

A. Upflow Installation

If return air is to be ducted through a floor, set unit on floor over opening and use 1/8- to 1/4-m. thick fireproof resilient gasket between duct,

unit, and floor.

Side return is a field option on slope coil models. Cut opening per dimensions. (See Fig. 1.) A field-supplied bottom closure is required.

Form: IM-FA4B-02 Cancels: IM-FA4B-01 Printed in U.S.A. 6-03 Catalog No. 63FA-4B1

POWERENTRY--_

OPTIONS_

018-06021-1N.FRONTSERVICE--_

07024-1N. CLEARANCE

UPFLOW/_

2°w

PRIMA_

UPFLOW/DOWNFLOW

SECONDARY DRAIN ,4

UPFLOW/DOWN FLOW J

PRIMARY DRAIN

_ IELD SUPPLIED

SUPPLY DUCT

OWVOL-

OPTIONS

UNIT A

0!8/024 12 In.

030/036 17 In.

042 !9 In.

2 1/2"

FIELD MODIFIED

A SIDE RETURN

LOCATION FOR

SLOPE COIL

UNITS ONLY

FIELD SUPPLIED

RETURN PLENUM

B. Downflow Installation

Fig. l--Slope Coil Unit in Upflow Application

A00069

z_ CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both

A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole

is plugged for all applications except downflow, but must be used for downflow. During the conversion process, remove the

plastic cap covering the vertical drains only and discard. Remove the plug from the overflow hole and discard. At completion

of the downflow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the

unit. Failure to follow this CAUTION could result in minor personal injury or product and property damage.

In this application, field conversion of the evaporator is required using accessory downflow kit along with an accessory base kit. Use fireproof

resilient gasket, 1/8- to ii4-in, thick, between duct, unit, and floor.

NOTE: To convert units for downflow applications, refer to Installation Instructions supplied with kit for proper installation. For slope fan coils,

use kit Part No. KFADC0201SLP. For A-coils, use kit Part No. KFADC0401ACL. Use fireproof resilient gasket, i/8- to 1/4-in. thick, between

duct, unit, and floor.

NOTE: Gasket kit number KFAHD0101SLP is also reqnired tbr all downflow applications to maintain low air lea_low sweat performance.

C. Horizontal Installation

Units must not be installed with access panels facing up 02"down. The FH4B003 and 004 size units equipped with accessory cooling coils are not

approved for horizontal applications. All other units are factory built for horizontal left installation. (See Fig. 2and 6.) When suspending unit fi'om

ceiling, dimples in casing indicate suitable location of screws for mounting metal support straps. (See Fig. 2.)

Z_ CAUTION: For optimum condensate drainage performance in horizontal installations, unit should be leveled along its

length and width. Failure to follow this CAUTION could result in minor personal injury or product and property damage.

NOTE: Modular units can be disassembled and components moved separately to installation area for reassembly. This process accommodates

small scuttle holes and limiting entrances to installation sites. (See Fig. 3.)

HORIZONTAL RIGHT CONVERSION OF UNITS WITH SLOPE COILS

NOTE: Gasket kit number KFAHD010ISLP is required for horizontal slope coil conversion to maintain low air leal_low sweat performance.

i. Remove blower and coil access panel and fitting panel. (See Fig. 4.)

2. Remove coil mounting screw securing coil assembly to right side casing flange.

3. Remove coil assembly.

LOW VO LT

ENTRY

OPTIONS

POWER

ENTRY OPTIONS

!RIMARY

FIELD _ %. DRAIN , DRAIN

SUPPLIED

HANGING

STRAPS

018-060 21-1N.

070 24-1N.

FRONTSERVICE

CLEARANCE

UNIT (FULL FACE

[OF UNIT)

'RR"2CCgSS

SECONDARY

DRAIN

A00070

Fig. 2--Slope Coil Unit in Horizontal Left Application

4. Lay fan coil unit on its right side and reinstall coil assembly with condensate pan down. (See Fig. 4.)

5. Attach coil to casing flange using coil mounting screw previously removed.

6. Make sure the pan cap in the fitting door is properly seated on the fitting door to retain the low air leak rating of the unit.

7. Add gaskets from kit KFAHD per kit instructions.

8. Align holes with robing connections and condensate pan connections, and reinstall access panels and fitting panel.

Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating. Install after brazing.

HORIZONTAL RIGHT CONVERSION OF UNITS WITH A-COILS

l. Remove blower and coil access panels. (See Fig. 5.)

2. Remove metal clip securing fitting panel to condensate pan. Remove fitting panel.

3. Remove 2snap-in clips securing A-coil in unit.

4. Slide coil and pan assembly out of unit.

5. Remove horizontal &ain pan support bracket fi'om coil support rail on left side of unit and reinstall on coil support rail on right side of unit.

6. Convert air-seal assembly for horizontal right.

a. Remove air-seal assembly from coil by removing 4 screws. (See Fig. 5.)

b. Remove air splitter (B) fi'om coil seal assembly by removing 3 screws. (See Fig. 5 fi_ctory shipped inset.)

c. Remove filter plate (A) and install air splitter (B) in place of filter plate.

d. Install filter plate (A) as shown in horizontal right application.

e. Remove condensate troughs (C) and install on opposite tube sheets.

f. Install hose onto plastic spout.

7. Install horizontal pan on right side of coil assembly.

8. Slide coil assembly into casing. Be sure coil bracket on each corner of vertical pan engages coil support rails.

9. Reinstall 2snap-in clips to correctly position and secure coil assembly in unit. Be sure clip with large off;ets is used on right side of unit

to secure horizontal pan.

-2SCREWS

BLOWER BOX

_2 SCREWS

BRACKET

COIL BOX

2SCREWS

Fig. 3--Removal of Brackets on Modular Units

COIL MOUNTING BLOWER

ASSEMB_

A95293

COIL

SUPPORT

RAIL

SLOPE COIL

SKI

•PRIMARY DRAIN

CONNECTIONS

SECONDARY DRAIN

A03001

Fig. 4--Conversion for Horizontal Right Applications Using a Slope Coil

10. Remove two oval fitting caps from left side of the coil, access panel, and fitting panel.

11. Remove insulation knockouts on right side of coil access panel

12. Remove 2oval coil access panel plugs and reinstall into holes on left side of coil access panel and fitting panel.

13. Install condensate pan fitting caps (from Step 10) in the right side of the coil door making sure that the cap snaps and seats cleanly on the

back side of the coil door. Make sure no insulation interferes with seating of the cap.

SEAL

CONNECTIONS

SUPPORT

RAIL

*¢ HORIZONTAL

RIGHT

APPLICATION

BRACKET

DRAIN

SUPPORT

BRACKET

SUPPORT

RAIL

BRACKET

DRAIN PAN

PRIMARY

HORIZONTAL RIGHT

SECONDARY DRAIN

HORIZONTAL RIGHT

A00071

Fig. 5_Conversion for Horizontal Right Applications Using A-Coil

14. Reinstall access and fitting panels, aligning holes with tubing connections and condensate pan connections. Be sure to reinstall metal clip

between fitting panel and vertical condensate pan.

Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating.

D. Manufactured and Mobile Home Housing Applications

l. Fan coil unit lnust be secured to the structure using field-supplied hardware.

2. Allow a minimum of 24" clearance from access panels.

3. Recommended method of securing lbr typical applications

a. If fan coil is away fi'om wall, attach pipe strap to top of Pan coil using No. 10 self tapping screws. Angle strap down and away fi'om back

of Pan coil, remove all slack, and Pasten to wall stud of structure using 5/16-in. lag screws. Typical both sides of Pan coil.

b. If Pan coil is against wall, secure fan coil to wall stud using 1/8-in. thick right-angle brackets. Attach brackets to Pan coil using No. I0

self tapping screws and to wall stud using 5/16-in. lag screws. (See Fig. 7.)

PROCEDURE a--AIR DUCTS

Connect supply-air duct over the outside of 3 4-in. flanges provided on supply-air opening. Secure duct to flange, using proper fasteners tbr type

of duct used, and seal duct-to-unit joint. If return-air flanges are required, install factory-authorized accessory kit.

Use flexible connectors between ductwork and unit to prevent transmission of vibration. When electric heater is installed, use heat-resistant

material for flexible connector between ductwork and unit at discharge connection. Ductwork passing through unconditioned space must be

insulated and covered with vapor barrier.

Units equipped with 20-30kw electric heaters reqnire a 1-in. clearance to combustible materials for the first 36 in. of supply duct.

Duetwork Acoustical Treatment

Metal duct systems that do not have a 90 ° elbow and 10 ft of main duct to first branch takeoff may require internal acoustical insulation lining.

As an alteruative, fibrous ductwork may be used if constructed and installed in accordance with the latest edition of SMACNA construction

standard on fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply with National Fire Protection Association as tested by

UL Standard 181 for Class 1 air ducts.

PROCEDURE 4---ELECTRICAL CONNECTIONS

All products from the factory utilize a printed-circuit board (PCB) which has a low voltage circuit protective fuse (5 amp), fan motor speed tap

selection terminal (SPT), and time delay relay (TDR) jumper. To disable the TDR feature, sever the jumper wire JWl. (See Fig. 8.)

When a factory-approved accessory control package has been installed, check all factory wiring per unit wiring diagram and inspect factory wiring

connections to be sure none were loosened in transit or installation. If a different control package is required, see unit rating plate.

Z_ CAUTION: If a disconnect switch is to be mounted on unit, select a location where drill or fastener will not contact

electrical or refrigerant components. Failure to follow this CAUTION could result in minor personal injury or porduct and

property damage.

COIL

FACTORYSHIPPED -- BRACKET

HORIZONTALLEFT

APPLICATION COIL

SUPPORT

RAIL

DRAINPAN

SUPPORT

BRACKET

COIL

BRACKET

HORIZONTAL

DRAINPAN AIRSEAL

ASSEMB_

REFRIGERANT

CONNECTIONS

Fig. 6--A-Coil in Horizontal Left Application (Factory Ready)

4" MAX

SECURE FAN COIL TO STRUCTURE

UNIT AWAY FROM WALL

PIPE STRAP

(TYPICAL BOTH SIDES)

UNtT AGAINST WALL

1/8-1N THICK ANGLE

MOUNTING BRACKET

(TYPICAL BOTH SIDES)

DOWN FLOW

-- BASE KIT (KFACB)

SECURE UNIT TO FLOOR

ANGLE BRACKET OR PIPE STRAP

Fig. 7--A-Coil

PRIMARY DRAIN

HORIZONTAL LEFT

SECONDARY DRAIN

HORIZONTAL LEFT

A00072

A02003

Before proceeding with electrical connections, make certain that supply voltage, frequency, phase, and ampacity are as specified on the unit rating

plate. See unit wiring label for proper field high- and low-voltage wiring. Make all electrical connections in accordance with the NEC and any

local codes or ordinances that may apply. Use copper wire only.

The unit nmst have a separate branch electric circuit with a field-supplied disconnect switch located within sight from and readily accessible from

the unit.

c7[_

R1] _)-

5_D1_

R5_

LR40061

A03010

Fig. 8--Fan Coil Printed-Circuit Board

On units with a factory installed disconnect with pull-out removed, service and maintenance can be safely performed on only the load side of the

control package.

z_ WARNING: Field wires on the line side of the disconnect found in the fan coil unit remain live, even when the pull-out

is removed. Service and maintenance to incoming wiring can not be performed until the main disconnect switch (remote to

the unit) is turned off. Failure to do so will result in electrical shock causing personal injury or death.

A. Line Voltage Connections

FA4B units installed without electric heat require the use of a factory-authorized Power Plug Kit (KFAPP0125PLG). This kit provides the electrical

connections necessary to supply the FA4B unit with 230-v power when electric heat is not present. This kit is required only on those FA4B

applications which do not use electric heat.

For units without electric heat:

1. Connect 208/230v power leads from field disconnect to yellow and black stripped leads.

2. Connect ground wire to unit ground lug.

3. If unit contains an electric heater, remove and discard power plug (if equipped) from fan coil and connect male plug t'rom heater to female

plug fi'om unit wiring harness. (See Electric Heater Installation Instructions.)

NOTE: Units installed without electric heat should have a field-supplied sheet metal block-offplate covering the heater opening. This will reduce

air leakage and formation of exterior condensation.

B. 24-v Control System

CONNECTION TO UNIT

Wire low voltage in accordance with wiring label on the blower. (See Fig. 9, 10, ll, 12, and 14.) Use no. 18 AWG color-coded, insulated (35°C

minimum) wire to make the low-voltage connections between the thermostat, the unit, and the outdoor equipment. If the thermostat is located more

than 100 ft from the unit (as measured along the low-voltage wire), use No. 16 AWG color-coded, insulated (35°C nfininmm) wire. All wiring

must be NEC Class 1 and must be separated from incoming power leads.

Refer to outdoor unit wiring instructions for any additional wiring procedure recommendations.

TRANSFORMER INFORMATION

Transformer is _actory-wired for 230v operation. For 208v applications, disconnect the black wire from the 230v terminal on transformer and

connect it to the 208v terminal (See Fig. 15).

HEATER STAGING

CAUTION: If W2, W3, and Eon any 3 stage heater (18, 20, 24, or 30kw), are individually connected as with outdoor

thermostats or any other situation, emergency heat relay must be used. This relay is in kit Part No. KHAOT0201SEC and is

normally used with kit Part No. KHAOT0301FST for 2 outdoor thermostat system. Failure to follow this CAUTION could result

in minor personal injury or product and property damage.

The controls are fi_ctory circuited for single-stage operation. For 2-stage operation, use outdoor thermostat kit Part No. KHAOT0301FST, and for

3-stage use both kits Part No. KHAOT0201SEC and KHAOT0301FST.

When 2 stages are desired, cut W3 at the W2 wire nut, strip and reconnect per the thermostat kit instruction. (See Fig. 12.) When 3 stages are

desired, cut the W2 wire nut off and discard. Strip W2, W3, and E and reconnect per thermostat kit instructions (See Fig. 14).

NOTE: When 3 stages are used or anytime the E terminal is not tied to W2, the emergency heat relay, part of outdoor kit Part No.

KHAOT0201SEC nmst be used.

THERMOSTAT

[]

FAN COIL

CONTROL

RED R

GRY G

AIR COND.

A94058

Fig. 9--Wiring Layout Air Conditioning Unit

(Cooling Only)

THERMOSTAT

[2P

FAN COIL

CONTROL

RED R

GRY G

AIR COND.

A94059

Fig. 10--Wiring Layout Air Conditioning Unit

(Cooling and l-Stage Heat)

--) C. Manufactured Housing

In Manufactured Housing applications, the Code of Federal Regulations, Title 24, Chapter XX, Part 3280.714 requires that supplemental electric

heat be locked out at outdoor temperatures above 40 degrees F., except for a heat pump defi'ost cycle. Refer to Fig. 13 for typical low voltage wiring

with outdoor thermostat.

D. Ground Connections

z_ WARNING: According to NEC, ANSI/NFPA 70, and local codes, the cabinet must have an uninterrupted or unbroken

ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal

conduit when installed in accordance with existing electrical codes. If conduit connection uses reducing washers, a separate

ground wire must be used. Failure to follow this warning could result in electric shock, fire, or death.

NOTE: Use UL-listed conduit and conduit connector for connecting supply wire(s) to unit to obtain proper grounding. Grounding may also be

accomplished by using grounding lugs provided in control box.

E. Minimum CFM and Motor Speed Selection

Units with or without electric heaters require a minimum CFM. Refer to the unit wiring label to ensure that the fan speed selected is not lower

than the minimum fan speed indicated.

Fan speed selection is done at the fan relay printed-circuit board. To change motor speeds, disconnect fan lead used on relay terminal (SPT) and

replace with motor speed tap desired. (See Fig. 16). Save insulating cap and place on motor lead removed from relay.

NOTE: In low static applications, lower motor speed tap should be used to reduce possibility of water being blown off coil.

All units have 3 motor speed taps. Low speed (red) is designed for mismatch outdoor unit applications. Medium speed (blue) is designed for

straight matched operations. High speed (black) is used with high external static duct systems of straight matched systems.

THERMOSTAT

[33-

[@-

[]

[3-

FAN COIL

(CONTROL'

HEAT PUMP

CONTROL

2k_ R

Z;_c

Fig. 11--Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat with No Outdoor Thermostat)

THERMOSTAT

[33-

[@-

[]

[3-

FAN COIL

(CONTROL'

W3,,_,_ ODTS

HEAT PUMP

CONTROL

z;_ R

Fig. 12--Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat with 1 Outdoor Thermostat)

A94060

A94061

PROCEDURE 5--REFRIGERANT TUBING

Use accessory tubing package o1" field-supplied tubing of refrigerant grade. Suction robe must be insulated. Do not use damaged, dirty, or

contaminated tubing because it may plug refrigerant flow-control device. ALWAYS evacuate the coil and field-supplied tubing to 500 microns

before opening outdoor unit service valves.

Z_ CAUTION: A brazing shield MUST be used when tubing sets are being brazed to the unit connections to prevent

damage to the unit surface and condensate pan fitting caps. Failure to follow this CAUTION could result in minor personal

injury or product and property damage.

Units have sweat suction and liquid tube connections. Make suction tube connection first.

1. Cut tubing to con'ect length.

2. Insert tube into sweat connection on unit until it bottoms.

3. Braze connection using silver bearing or non-silver bearing brazing materials. Do not use solder (materials which melt below 800°F).

Consult local code requirements.

z_ CAUTION: Wrap a wet cloth around rear of fitting to prevent damage to TXV and factory-made joints. Failure to follow

this CAUTION could result in minor personal injury or product and property damage.

___>

THERMOSTAT

[]

FAN COIL

CONTROL)

HEAT PUMP

(CONTROL

Fig. 13--Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat for Manufactured Housing)

TH ERMOSTAT

[]-

[]- w

[]

FAN COIL

'CONTROL'

RED R

H_ W2

w3BL U

VIO

HEAT PUMP

(CONTROL

A03088

EMERGENCY HEAT RELAY

Fig. 14--Wiring Layout Heat Pump Unit

(Cooling and 2-Stage heat with 2 Outdoor Thermostats)

A94062

PROCEDURE 6--REFRIGERANT FLOW-CONTROL DEVICE

z_ CAUTION: If using a TXV (FC4C factory installed) in conjunction with a single-phase reciprocating compressor, a

compressor start capacitor and relay are required. Consult outdoor unit pre-sale literature for start assist kit part no.

Replace piston if required. Check piston size shown on indoor unit rating plate to see if it matches required piston shown on outdoor unit rating

plate. If it does not match, replace indoor piston with piston shipped with outdoor unit. The piston shipped with outdoor unit is con'ect lbr any

approved indoor coil combination (See Fig. 17). When changing piston, use a back-up wrench. Hand tighten hex nut, then tighten with wrench

i/2 turn. Do not exceed 30 ft-lbs.

PROCEDURE 7--CONDENSATE DRAINS

To connect drains, the cap openings must be removed. Use a knife to start the opening near the tab and using pliers, pull the tab to remove the

disk. Clean the edge of the opening if necessary and install the condensate line. Finally caulk around the lines where they exit the fitting to retain

the low leak rating of the unit.

BLK

Fig. 15--Transformer Connections

A94067

FAN

INSULATING CAP

MOTOR SPEED

TAP LEADS SPEED TAP

TERMINAL

COMMON YELLOV_ WRAPPER

FAN DECK A97529

Fig. 16--Fan Coil Relay and Speed Tap Terminal

z_ CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both

A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole

is plugged for all applications except downflow, but must be used for downflow. During the conversion process, remove the

plastic cap covering the vertical drains only and discard. Remove the plug from the overflow hole and discard. At completion

of the downflow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the

unit. Failur to follow this CAUTION could result in minor personal injury or product and property damage.

Units are equipped with primary and secondary 3/4-in. FPT drain connections. For proper condensate line installations see Fig. l, 2, 4, 5, and 6.

To prevent property damage and achieve optimum &ainage performance, BOTH primary and secondary &ain lines should be installed and include

properly-sized condensate traps (See Fig. 18). Factory-approved condensate traps are available. It is recommended that PVC fittings be used on

the plastic condensate pan. Finger-tighten plus 1-1/2 turns. Do not over-tighten. Use pipe dope.

CAUTION: Shallow, running traps are inadequate and DO NOT allow proper condensate drainage. (See Fig. 19.)

Failure to follow this CAUTION could result in minor personal injury or product and property damage.

NOTE: When connecting condensate drain lines, avoid blocking filter access panel, tlms preventing filter removal. After connection, prime both

primary and secondary condensate traps.

TEFLON SEAL

BRASS"-_ \ F PISTON W- DISTRIBUTOR

PISTON BRASS

RETAINER HEXBODY

_ STRAINER

Fig. 17--Refrigerant Flow-Control Device (FC4C has TXV and Strainer)

A94415

UNIT

Fig. 18--Recommended Condensate Trap

A03002

NOTE: If unit is located in or above a living space where damage may result from condensate overflow, a field-supplied, external condensate

pan should be installed underneath the entire unit, and a secondary condensate line (with appropriate trap) should be run from the unit into the

pan. Any condensate in this external condensate pan should be &ained to a noticeable place. As an alternative to using an external condensate pan,

some localities may allow the use of a separate 3/4-in. condensate line (with appropriate trap) to a place where the condensate will be noticeable.

The owner of the structure must be infomled that when condensate flows from the secondary drain or external condensate pan, the unit requires

servicing or water damage will occur.

Install traps in the condensate lines as close to the coil as possible. (See Fig. 20.) Make sure that the outlet of each trap is below its connection

to the condensate pan to prevent condensate from overflowing the &ain pan. Prime all traps, test for leaks, and insulate traps if located above a

living area.

Condensate drain lines should be pitched downward at a minimum slop of 1 in. for every 10 ft of length.

Consult local codes for additional restrictions or precautions.

PROCEDURE 8--ACCESSORIES

A. Electronic Air Cleaner

The Electronic Air (?leaner may be connected to fan coil as shown in Fig. 21. This method requires a field supplied transfomler. See Electronic

Air Cleaner literature for kit requirements.

B. Humidifier

Connect humidifier and humidistat to fan coil unit as shown in Fig. 22 and Fig. 23. The cooling lockout relay is optional (See Fig. 220

DO NOT USE SHALLOW RUNNING TRAPS!

Fig. 19--Insufficient Condensate Trap

A03013

PRIMARY TRAP REQUIRE_XB_

(USE FACTORY KIT OR

FIELD-SUPPLIED TRAP OF

SUFFICIENT DEPTH.

STANDARD P-TRAPS ARE

NOT SUFFICIENT. SEE

FIGURE OF RECOMMENDED

CONDENSATE TRAP)

_FILTER

ACCESS

L SECONDA_AyNDE_AINWITH

APPROPRIATE TRAP REQUIRED

(USE FACTORY KIT OR

FIELD-SUPPLIED TRAP)

A03003

Fig. 20--Condensate Trap and Unit

PROCEDURE 9--SEQUENCE OF OPERATION

A. Continuous Fan

Thermostat closes R to G. G energizes fan relay on PCB which completes circuit to indoor blower motor. When G is de-energized, there is a 90

see delay belbre relay opens.

B. Cooling Mode

Thermostat energizes R to G, R to Y, and R to O (heat pump only). G energizes fan relay on PCB which completes circuit to indoor blower motor.

When G is de-energized, there is a 90 sec delay before fan relay opens.

C. Heat Pump Heating Mode

Thermostat energizes R to G and R to Y. G energizes fan relay on PCB which completes circuit to indoor blower motor. When G is de-energized,

there is a 90 sec delay before fan relay opens.

D. Heat Pump Heating with Auxiliary Electric Heat

Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay on PCB which completes circuit to indoor blower motor. W energizes

electric heat relay(s) which completes circuit to heater element(s). When W is de-energized, electric heat relay(s) open, turning offheater elements.

When G is de-energized there is a 90 sec delay belbre _an relay opens.

E. Electric Heat or Emergency Heat Mode

Thermostat closes R to W. W energizes electric heat relay(s) which completes circuit to heater element(s). Blower motor is energized through

normally closed contacts on fan relay. When W is de-energized, electric heat relay(s) opens.

START-UP PROCEDURES

Refer to outdoor unit Installation Instructions for system start-up instructions and refrigerant charging method details.

CONTROL BOARD

FAN RELAY R G T C C

'230VAC NONe I I

SPT NONC

i i 2o8/23OVA0_ COM

! CONVERSIONKITI_ I

ToTRANSFORMERI II

BLOWER I _ _ _ I I

MOTOR '-"_'--_ I

TO EAC

FROMMOLEX

PLUGAND

TRANSFORMER

(IN UNIT)

Fig. 21--Wiring Layout of Electronic Air Cleaner to Fan Coil

THERMOSTAT

[]-

[]

FANCOIL

(CONTROL)

,E ,

FANHU_

HEATPUMP

(CONTROL)

4:3-_R

_:3-0

I I

RELAY II

_HUMIDISTAT

A03011

A95294

Fig. 22---Wiring Layout of Humidifier to Heat Pump

z:_ CAUTION: Never operate unit without a filter. Damage to blower motor or coil may result. Factory authorized filter kits

must be used when locating the filter inside the unit. For those applications where access to an internal filter is impractical,

a field-supplied filter must be installed in the return duct system. Failure to follow thid CAUTION could result in minor

personal injury or product and property damage.

CARE AND MAINTENANCE

To continue high performance and minimize possible equipment failure, it is essential that periodic maintenance be performed on this equipment.

Consult your local dealer as to the proper frequency of maintenance contract.

THERMOSTAT

[]

FAN HUM_

11@?? I

FAN COIL

CONTROL

RED R

GRY G

C AIR COND.I ,,'

I I

L---4 ......

' 1

z; L---_

Fig. 23--Wiring Layout of Humidifier to Fan Coil

with Electric Heat

A95295

I Gel.

FAN RELAY

SPDT

24VAC COIL

230VAC 15A

HIGH

DEHUMIDISTAT SPEED

(OPENS ON RINSE) MOTOR

LOW

SPEED

MOTOR

A03012

Fig. 24_Latent Capacity Control

The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools. If you do not possess these, contact

your dealer for maintenance. The only consumer selwice recommended or required if filter replacement or cleaning on a monthly basis.

CARRIER Air Handler (indoor Blower&evap) Manual L0602098

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