Installation Instructions
Direct Expansion Fan Coil Units
Fan Unit
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 the 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
to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. 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.
. When you see this symbol on the unit and in instructions or manuals, be alert
FA4A, FB4A, FC4B
FH4A
INTRODUCTION
Models FA4A, FB4A, FC4B, and FH4A are designed for flexibility and can be used for upflow, horizontal, or downflow (kit required)
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. Some units have a factory supplied 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 kits.
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 Figs. 2 and 6.) When suspending unit
from ceiling, dimples in casing indicate suitable location of screws for mounting metal support straps. (See Fig. 2.)
Form: IM-FA4A-10 Cancels: IM-FA4A-09 Printed in U.S.A. 6-00 Catalog No. 63FA-4A5
POWER ENTRY
OPTIONS
FIELD SUPPLIED
SUPPLY DUCT
LOW VOLT
ENTRY
OPTIONS
018-060
070 24-IN.
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
21-IN. FRONT SERVICE
A COIL
UNITS
PRIMARY DRAIN
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
CLEARANCE
018/024
030/036
1 1⁄2″
19
1
⁄2″
2
→ Fig. 1—Slope Coil Unit in Upflow Application
UNIT
042 19 In.
″
A
A
12 In.
17 In.
FIELD MODIFIED
SIDE RETURN
LOCATION FOR
SLOPE COIL
UNITS ONLY
FIELD SUPPLIED
RETURN PLENUM
A00069
CAUTION: For optimum condensate drainage performance in horizontal installations, unit should be leveled along its
length and width.
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: The TXV sensing bulb must be insulated on slope coils in horizontal right and downflow applications. Failure to insulate bulb will result
in performance loss.
1. Remove blower and coil access panels and fitting panel. (See Fig. 4.)
2. Remove coil mounting screw securing coil assembly to right-side casing flange.
3. Remove coil assembly.
4. On FC4 insulate TXV sensing bulb with cork tape or other permanent insulating material. (See Fig. 4.)
5. Lay fan coil unit on its right side and reinstall coil assembly with condensate pan down. (See Fig. 4.)
6. Attach coil to casing flange using coil mounting screw previously removed.
7. Align holes with tubing 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-COIL
1. Remove blower and coil access panels. (See Fig. 5.)
2. Remove metal clip securing fitting panel to condensate pan. Remove fitting panel.
3. Remove 2 snap-in clips securing A-coil in unit.
4. Slide coil and pan assembly out of unit.
5. Remove horizontal drain pan support bracket from 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) from coil seal assembly by removing 3 screws. (See Fig. 5—factory-shipped inset.)
—2—
A-COIL
HORIZONTAL LEFT
LOW VOLT
ENTRY
OPTIONS
POWER
ENTRY OPTIONS
FIELD
SUPPLIED
HANGING
STRAPS
UNIT
SECONDARY
DRAIN
PRIMARY
DRAIN
SECONDARY
DRAIN
→ Fig. 2—Slope Coil Unit in Horizontal Left Application
PRIMARY
DRAIN
018-060 21-IN.
070 24-IN.
FRONT SERVICE
CLEARANCE
(FULL FACE
OF UNIT)
1 3/4 IN.
FILTER ACCESS
CLEARANCE
A00070
BLOWER BOX
2 SCREWS
2 SCREWS
REAR CORNER
BRACKET
2 SCREWS
COIL BOX
Fig. 3—Removal of Brackets on Modular Unit
—3—
A95293
COIL
SUPPORT
RAIL
COIL MOUNTING
SCREW
BLOWER
ASSEMBLY
SLOPE COIL
SKI
DRAINPAN
COIL
SUPPORT
RAIL
COIL
BRACKET
REFRIGERANT
CONNECTIONS
PRIMARY DRAIN
OVERFLOW HOLE
SECONDARY DRAIN
Fig. 4—Conversion for Horizontal Right Applications Using a Slope Coil
A
REFRIGERANT
CONNECTIONS
AIR SEAL
ASSEMBLY
B
C
TXV SENSING
BULB MUST BE
INSULATED
A99033
HORIZONTAL
RIGHT
APPLICATION
DRAIN PAN
SUPPORT
BRACKET
COIL
SUPPORT
RAIL
COIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIMARY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
→ Fig. 5—Conversion for Horizontal Right Applications Using A-Coil
A00071
—4—
A
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
B
C
BRACKET
HORIZONTAL
DRAIN PAN
AIR SEAL
ASSEMBLY
REFRIGERANT
CONNECTIONS
HORIZONTAL LEFT
COIL
BRACKET
COIL
SUPPORT
RAIL
DRAIN PAN
SUPPORT
BRACKET
COIL
PRIMARY DRAIN
SECONDARY DRAIN
HORIZONTAL LEFT
→ Fig. 6—A-Coil in Horizontal Left Application (Factory Ready)
c. Remove filler plate (A) and install air splitter (B) in place of filler plate.
d. Install filler 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 2 snap-in clips to correctly position and secure coil assembly in unit. Be sure clip with large offset is used on right side of unit
to secure horizontal pan.
10. Remove 2 oval coil access panel plugs and reinstall into holes on left side of coil access panel and fitting panel.
11. Remove insulation knockouts on right side of coil access panel.
12. 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.
PROCEDURE 2—AIR DUCTS
Connect the supply-air duct over the outside of the 3/4-in. flanges provided on the supply-air opening. Secure the duct to the flange, using proper
fasteners for the type of duct used, and seal the 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 require a 1-in. clearance to combustible materials for the first 36 in. of supply duct. Fan coil size
024 with 15kw smart heat also requires 1-in. clearance to combustible materials for the first 36 in. of supply duct.
A. Ductwork 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 alternative, 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 3—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 JW1. (See Fig. 7.)
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.
A00072
CAUTION: If a disconnect switch is to be mounted on the unit, select a location where drill or fastener will not contact
electrical or refrigerant components.
—5—
C8
1005-161
C7
R2
R3
C3
R6
R11
Z1
R1
1005-83-161ACPC-E
D2
D1
94V-0
R7
C1C2
R10
R9
R8
®
LR40061
R5
R4
C5
C6
U1
C4
Q1
CESO130003-01
®
HSCI
K1
C
T
G
R
TRG C
F1
NC
NO
SPT
5 AMP
FAN
JW1
RELAY
A95553
Fig. 7—Fan Coil Printed-Circuit Board
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 must have a separate branch electric circuit with a field-supplied disconnect switch located within sight from and readily accessible from
the unit.
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.
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
FA4A 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 FA4A unit with 230-v power when electric heat is not present. This kit is required only on those
FA4A 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 from heater to female
plug from unit wiring harness. (See Electric Heater Installation Instructions.)
NOTE: Units installed without electric heat should have a field-supplied sheet metal block-off plate 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 the wiring label on the blower. (See Fig. 8, 9, 10, 11, and 12.) 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 minimum) 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.
—6—
THERMOSTAT
FAN COIL
(CONTROL)
THERMOSTAT
FAN COIL
(CONTROL)
R
G
W
Y
Fig. 8—Wiring Layout Air Conditioning Unit
THERMOSTAT
R
G
C
W
2
E
L
O
WHT
RED
GRY
WHT
BLU
VIO
BRN
R
G
W
W
E
C
(Cooling Only)
FAN COIL
(CONTROL)
RED
GRY
BRN
WHT
BLU
VIO
WHT
RED
GRY
WHT
BLU
VIO
BRN
R
G
W
2
W
3
E
C
AIR COND.
C
Y
A94059
R
G
2
3
AIR COND.
C
Y
A94058
W
Y
Fig. 9—Wiring Layout Air Conditioning Unit
(Cooling and 1-Stage Heat)
HEAT PUMP
(CONTROL)
R
G
C
W
2
W
3
E
R
C
W
2
O
THERMOSTAT
R
G
C
W
2
E
L
O
FAN COIL
(CONTROL)
RED
GRY
BRN
WHT
W
VIO
E
BLU
W
HEAT PUMP
(CONTROL)
R
G
C
2
ODTS
3
R
C
W
2
O
Y
Y
A94060
Fig. 10—Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
(Cooling and 2-Stage Heat with 1 Outdoor Thermostat)
Y
Fig. 11—Wiring Layout Heat Pump Unit
Y
A94061
TRANSFORMER INFORMATION
Transformer is factory wired for 230-v operation. For 208-v applications, disconnect the black wire from the 230-v terminal on the transformer
and connect it to the 208-v terminal. (See Fig. 13.)
HEATER STAGING
CAUTION: If W2, W3, and E on 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 KHAOT0201SEC and is normally
used with kit KHAOT0301FST for 2 outdoor thermostat system.
The controls are factory-circuited for single-stage operation. For 2-stage operation, use outdoor thermostat kit KHAOT0301FST, and for 3-stage
use both kits 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. 11.) 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. 12.)
NOTE: When 3 stages are used or anytime the E terminal is not tied to W2, the emergency heat relay, part of outdoor thermostat kit
KHAOT0201SEC must be used.
—7—
THERMOSTAT
R
G
C
W
2
L
E
FAN COIL
(CONTROL)
RED
GRY
BRN
WHT
W
W
HEAT PUMP
(CONTROL)
R
G
C
2
BLU
ODTS1
3
VIO
E
ODTS2
R
C
W
2
O
Y
C147C963
EMERGENCY HEAT RELAY
O
Y
Fig. 12—Wiring Layout Heat Pump Unit (Cooling and 2-Stage Heat with 2 Outdoor Thermostats)
SECONDARY
BRN
RED
C
208
230
YEL
BLK
A94062
C. Ground Connections
→
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 electrical 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.
D. 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 on the printed-circuit board. To change motor speeds, disconnect the fan lead used on the relay terminal
(SPT) and replace with the motor speed tap desired. (See Fig. 14.) Save the insulating cap and place on the motor lead removed from the relay.
NOTE: In low static applications, lower motor speed tap should be used to reduce possibility of water being blown off coil.
PRIMARY
A94067
Fig. 13—Transformer Connections
—8—
SINGLE SPADE
INSULATING CAP (2)
MOTOR SPEED
TAP LEADS
2 OR 3
PCB
FAN RELAY
SPEED TAP
TERMINAL
COMMON YELLOW
FAN DECK
WRAPPER
Fig. 14—Fan Coil Fan Relay and Speed Tap Terminal
All units have 3 motor speed taps, except the FA4A 018 through 036. 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.
PROCEDURE 4—REFRIGERANT TUBING
Use accessory tubing package or field-supplied tubing of refrigerant grade. Suction tube 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.
CAUTION: Braze with Sil-Fos or Phos-copper on copper to copper joints and wrap a wet cloth around rear of fitting
to prevent damage to TXV.
PROCEDURE 5—REFRIGERANT FLOW-CONTROL DEVICE
CAUTION: If using a TXV (FC4B 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 correct for any
approved indoor coil combination. (See Fig. 15.) When changing piston, use a back-up wrench. Hand tighten hex nut, then tighten with wrench
1/2 turn. Do not exceed 30 ft-lbs.
PROCEDURE 6—CONDENSATE DRAINS
Units are equipped with primary and secondary 3/4 in. FPT drain connections. For proper condensate line installation see Fig. 1, 2, 4, 5, and 6.
To prevent property damage and achieve optimum drainage performance, BOTH primary and secondary drain lines should be installed and include
properly-sized condensate traps. (See Fig. 16.) Factory-approved traps are available (Kit No. KFAET0125ETK). Be sure to install plastic push-in
plugs in unused condensate drain fittings. It is recommended that PVC fittings be used on the plastic condensate pan. Do not over-tighten.
Finger-tighten plus 1-1/2 turns. Use pipe dope.
A94068
CAUTION: Shallow, running traps are inadequate and DO NOT allow proper condensate drainage. (See Fig. 17.)
—9—
BRASS
HEX NUT
TEFLON SEAL
DISTRIBUTORPISTON
PISTON
RETAINER
STRAINER
BRASS
HEX BODY
Fig. 15—Refrigerant Flow-Control Device (FC4B Has TXV and Strainer)
NOTE: When connecting condensate drain lines, avoid blocking filter access panel, preventing filter removal. Prime both primary and secondary
condensate traps after connecting to drain pan.
NOTE: If the 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 drained 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 informed 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. 18.) Make sure that the outlet of each trap is below its 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.
Condensate drain lines should be pitched downward at a minimum slope of 1 in. for every 10 ft of length.
Consult local codes for additional restrictions or precautions.
PROCEDURE 7—ACCESSORIES
A. Electronic Air Cleaner
The Electronic Air Cleaner may be connected to the fan coil as shown in Fig. 19. This method requires a field supplied transformer. Consult
electronic air cleaner literature for kit requirements.
B. Humidifier
Connect humidifier and humidistat to the fan coil unit as shown in Fig. 20 and Fig. 21. The cooling lockout relay is optional (See Fig. 22.)
→
PROCEDURE 8—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
sec delay before 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) opens turning off heater elements.
When G is de-energized there is a 90 sec delay before fan 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 turning off heater elements. Blower motor is
de-energized after heater relay(s) opens.
A94415
—10—
UNIT
2 1⁄4″
2 1⁄4″
DO NOT USE SHALLOW RUNNING TRAPS!
Fig. 16—Recommended Condensate Trap
PRIMARY TRAP REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
Fig. 18—Condensate Drain
A95321
FILTER
ACCESS
PANEL
SECONDARY DRAIN REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
A99040
Fig. 19—Wiring Layout of Electronic Air Cleaner to Fan Coil
Fig. 17—Insufficient Condensate Trap
NO
NC
NONCSPT
TO EAC
WIRE
NUT
CONVERSION KIT
TRANSFORMER
TO
BLOWER
MOTOR
230VAC
COM
208/230VAC COM
CES0130003-01
CONTROL BOARD
RFAN RELAY
GTC
24VAC
COM 208/
FROM MOLEX
PLUG AND
TRANSFORMER
(IN UNIT)
A95320
COM
230
A98626
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. FA4A units are not shipped
with filters. 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.
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 and the availability of a maintenance contract.
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 service recommended or required is filter replacement or cleaning on a monthly basis.
START-UP
CARE AND MAINTENANCE
—11—
THERMOSTAT
R
G
C
W
2
E
L
O
Y
FAN HUMIDIFIER
WHT
FAN COIL
(CONTROL)
RED
GRY
BRN
WHT
W
BLU
W
VIO
R
G
C
2
3
E
RELAY
HEAT PUMP
(CONTROL)
R
C
W
2
O
Y
THERMOSTAT
R
G
W
WHT
RED
GRY
WHT
BLU
VIO
BRN
FAN COIL
(CONTROL)
R
G
W
2
W
3
E
C
AIR COND.
C
115V
M
HUMIDISTAT
Fig. 20—Wiring Layout of Humidifier to Heat Pump
CES0130003
COM
FAN RELAY
A95294
C
G
DEHUMIDISTAT
(OPENS ON RISE)
Y
Y
HUMIDISTAT
FAN HUMIDIFIER
115V
M
A95295
Fig. 21—Wiring Layout of Humidifier to Fan Coil with
Electric Heat
SPDT
24VAC COIL
230VAC 15A
TO
HIGH
SPEED
MOTOR
TO
LOW
SPEED
MOTOR
© 2000 CAC/BDP P.O. Box 70, Indianapolis, IN 46206 imfa4a10
Fig. 22—Latent Capacity Control
—12—
A95296
Book/Tab: 1/3d, 4/2e Catalog No. 63FA-4A5
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