Instruction manual

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

This symbol → indicates a change since the last issue.

SAFETY CONSIDERATIONS

Improper 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 factory-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

. 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.

WARNING: Before installing or servicing unit, always turn off all power to unit. There may be more than 1 disconnect

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

INTRODUCTION

Models FA4A, FB4A, FC4B, and FH4A are designed for flexibility and can be used for upflow, horizontal, or downflow (kit required and

manufactured and mobile home) applications. These units are available for systems of 24,000 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 equipped with factory installed heat, a factory 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 warranty. If fan 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 1—MOUNT UNIT

Unit can stand or lie on floor, or hang from ceiling or wall. Allow space for wiring, piping, and servicing 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-in. 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.

B. Downflow Installation

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

installation instructions packaged with accessory kit. See Product Data for kit part numbers.

C. Horizontal Installation

Units must not be installed with access panels facing up or down. The FH4A003 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. 2 and 6.) When suspending unit from

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

Direct Expansion Fan Coil Units Fan Unit

FA4A, FB4A, FC4B

FH4A

Form: IM-FA4A-11 Cancels: IM-FA4A-10 Printed in U.S.A. 3-02 Catalog No. 63FA-4A6

Summary of content (16 pages)

PAGE 1
Direct Expansion Fan Coil Units Fan Unit FA4A, FB4A, FC4B FH4A NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage.
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FIELD SUPPLIED SUPPLY DUCT POWER ENTRY OPTIONS LOW VOLT ENTRY OPTIONS 018-060 21-IN. FRONT SERVICE 070 24-IN. CLEARANCE UNIT 018/024 030/036 042 A COIL UNITS UPFLOW/DOWNFLOW SECONDARY DRAIN A 12 In. 17 In. 19 In. 1 1⁄2″ UPFLOW/DOWNFLOW PRIMARY DRAIN 19″ A 2 1⁄2″ FIELD MODIFIED SIDE RETURN LOCATION FOR SLOPE COIL UNITS ONLY UPFLOW/DOWNFLOW SECONDARY DRAIN UPFLOW/DOWNFLOW PRIMARY DRAIN FIELD SUPPLIED RETURN PLENUM A00069 Fig.
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A-COIL HORIZONTAL LEFT SECONDARY DRAIN FIELD SUPPLIED HANGING STRAPS PRIMARY DRAIN 018-060 21-IN. 070 24-IN. FRONT SERVICE CLEARANCE (FULL FACE OF UNIT) UNIT LOW VOLT ENTRY OPTIONS 1 3/4 IN. FILTER ACCESS CLEARANCE PRIMARY DRAIN SECONDARY DRAIN POWER ENTRY OPTIONS A00070 Fig. 2—Slope Coil Unit in Horizontal Left Application f. Install hose onto plastic spout. 7. Install horizontal pan on right side of coil assembly. 8. Slide coil assembly into casing.
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BLOWER BOX 2 SCREWS 2 SCREWS REAR CORNER BRACKET 2 SCREWS COIL BOX A95293 Fig. 3—Removal of Brackets on Modular Units 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 require a 1-in.
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COIL MOUNTING SCREW BLOWER ASSEMBLY COIL SUPPORT RAIL SLOPE COIL SKI DRAINPAN REFRIGERANT CONNECTIONS PRIMARY DRAIN OVERFLOW HOLE SECONDARY DRAIN A02002 → Fig. 4—Conversion for Horizontal Right Applications Using a Slope Coil A REFRIGERANT CONNECTIONS AIR SEAL ASSEMBLY HORIZONTAL RIGHT APPLICATION COIL SUPPORT RAIL B C COIL BRACKET DRAIN PAN SUPPORT BRACKET COIL SUPPORT RAIL COIL BRACKET HORIZONTAL DRAIN PAN PRIMARY DRAIN HORIZONTAL RIGHT SECONDARY DRAIN HORIZONTAL RIGHT A00071 Fig.
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A COIL BRACKET FACTORY SHIPPED HORIZONTAL LEFT APPLICATION COIL SUPPORT RAIL B C DRAIN PAN SUPPORT BRACKET COIL BRACKET HORIZONTAL DRAIN PAN PRIMARY DRAIN HORIZONTAL LEFT AIR SEAL ASSEMBLY SECONDARY DRAIN HORIZONTAL LEFT REFRIGERANT CONNECTIONS A00072 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) OR UNIT AGAINST WALL 1/8-IN.
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C G K1 R5 R4 Q1 NO FAN RELAY ® HSCI NC SPT CPC-E 94V-0 D2 C1 F1 ® C2 R C5 R8 JW1 C4 C6 R11 Z1 R1 5 AMP T G R2 R3 C3 R6 R U1 R7 C T R10 R9 C7 1005-83-161A CESO130003-01 1005-161 C8 D1 LR40061 A95553 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.
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FAN COIL (CONTROL) THERMOSTAT RED R GRY G W R G WHT WHT BLU VIO BRN W2 W3 E C AIR COND. C Y Y A94058 Fig. 9—Wiring Layout Air Conditioning Unit (Cooling Only) FAN COIL (CONTROL) THERMOSTAT RED R G W R GRY G WHT WHT BLU VIO BRN W2 W3 E C AIR COND. C Y Y A94059 Fig. 10—Wiring Layout Air Conditioning Unit (Cooling and 1-Stage Heat) 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 must be used.
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THERMOSTAT R G C W2 E FAN COIL (CONTROL) RED GRY BRN R HEAT PUMP (CONTROL) R G C C WHT W 2 BLU W3 VIO E L W2 O O Y Y A94060 Fig. 11—Wiring Layout Heat Pump Unit (Cooling and 2-Stage Heat with No Outdoor Thermostat) THERMOSTAT FAN COIL (CONTROL) R RED G GRY G C W2 E BRN R R C C WHT W 2 VIO E BLU W3 HEAT PUMP (CONTROL) W2 ODTS L O O Y Y A94061 Fig.
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FAN COIL (CONTROL) THERMOSTAT R RED R G GRY G C BRN C W2 WHT W 2 HEAT PUMP (CONTROL) R C W2 BLU ODTS1 W3 VIO E ODTS2 L E O O Y Y C 1 4 7 C 9 6 3 EMERGENCY HEAT RELAY A94062 Fig. 13—Wiring Layout Heat Pump Unit (Cooling and 2-Stage heat with 2 Outdoor Thermostats) SECONDARY YEL BLK 230 208 C BRN RED PRIMARY A94067 PROCEDURE 6—CONDENSATE DRAINS Fig. 14—Transformer Connections Units are equipped with primary and secondary 3/4-in. FPT drain connections.
PAGE 11
PCB FAN RELAY SINGLE SPADE INSULATING CAP (2) MOTOR SPEED TAP LEADS SPEED TAP TERMINAL WRAPPER COMMON YELLOW FAN DECK A97529 Fig. 15—Fan Coil Relay and Speed Tap Terminal BRASS HEX NUT TEFLON SEAL PISTON PISTON RETAINER DISTRIBUTOR BRASS HEX BODY STRAINER A94415 Fig.
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UNIT 2″ ΜΙΝ 2″ ΜΙΝ A02006 → Fig. 17—Recommended Condensate Trap DO NOT USE SHALLOW RUNNING TRAPS! A95320 Fig. 18—Insufficient Condensate Trap Install traps in the condensate lines as close to the coil as possible. (See Fig. 19.) Make sure that the outlet of each trap is below it connection to the condensate pan to prevent condensate from overflowing the drain pan. Prime all traps, test for leaks, and insulate traps if located above a living area.
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CES0130003-01 CONTROL BOARD FAN RELAY R G T C 230VAC NO NC COM WIRE NUT SPT NO NC 208/230VAC COM 24VAC COM COM 208/ 230 CONVERSION KIT TRANSFORMER TO BLOWER MOTOR TO EAC FROM MOLEX PLUG AND TRANSFORMER (IN UNIT) A98626 Fig. 20—Wiring Layout of Electronic Air Cleaner to Fan Coil PROCEDURE 7—ACCESSORIES A. Electronic Air Cleaner The Electronic Air Cleaner may be connected to fan coil as shown in Fig. 20. This method requires a field supplied transformer.
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FAN COIL (CONTROL) THERMOSTAT RED R GRY G BRN C W2 WHT E R G C C WHT W 2 BLU W3 VIO E L W2 O O Y Y FAN HUMIDIFIER 115V R HEAT PUMP (CONTROL) RELAY M HUMIDISTAT A95294 Fig. 21—Wiring Layout of Humidifier to Heat Pump START-UP PROCEDURES Refer to outdoor unit Installation Instructions for system start-up instructions and refrigerant charging method details. CAUTION: Never operate unit without a filter. Damage to blower motor or coil may result.
PAGE 15
FAN COIL (CONTROL) THERMOSTAT RED R GRY G WHT W WHT BLU VIO BRN R G W2 W3 E AIR COND. C C Y Y HUMIDISTAT FAN HUMIDIFIER 115V M A95295 Fig. 22—Wiring Layout of Humidifier to Fan Coil with Electric Heat SPDT 24VAC COIL 230VAC 15A CES0130003 COM FAN RELAY G C DEHUMIDISTAT (OPENS ON RISE) TO HIGH SPEED MOTOR TO LOW SPEED MOTOR A95296 Fig.