Carrier 40FKA Manual

40FKA
Comfort Heat Pump System
002-006
Installation and Set-up Instructions
NOTE: Read entire instruction manual before starting installa-
tion.
See Back Page for QUICK REFERENCE COMFORT HEAT
SET-UP INSTRUCTIONS.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock or other condi-
tions 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 pack-
aged 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 and in installation
instructions or manuals. 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 or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER 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.
INTRODUCTION
Model 40FKA Fan Coil units are designed for flexibility and can
be used for upflow, horizontal, or downflow applications. A
Fig. 1—Comfort Heat Pump System A98049
40FKA FAN COIL
THERMIDISTAT ™
CONTROL
OUTDOOR TEMPERATURE SENSOR
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 2e 3d PC 101 Catalog No. 534-021 Printed in U.S.A. Form 40FK-1SI Pg 1 5-98 Replaces: New

Fig. 2—Dimensional Drawing
UNIT SIZE A BCD E F G
In. In. In. In. In. In. In.
40FKA
002 42-11/16 17-5/8 15-3/4 15-5/8 10-3/4 18-9/16 18-1/4 003 53-7/16 21-1/8 19-1/4 19-1/8 19-3/16 26-15/16 27-1/2 005 53-7/16 21-1/8 19-1/4 19-1/8 19-1/2 27-1/4 26-15/16 006 59-3/16 24-11/16 22-3/4 22-11/16 25-1/4 32-15/16 32-5/8
A98276
B
C
DISCONNECT OR CIRCUIT BREAKER LOCATION BLOWER, CONTROL, & ELECTRIC HEATER ACCESS PANEL COIL ACCESS PANEL SUCTION LINE CONNECTION
FILTER ACCESS PANEL
LIQUID LINE CONNECTION
1″D
OPENING
10 7⁄16″
2 5⁄8″
6 3⁄16″
5″
15⁄16″
7⁄8″DIA KNOCKOUTS
FOR LOW VOLTAGE CONTROL WIRING
1 15⁄16″
1 7⁄8″
7⁄8″, 1 3⁄32″, 2″ DIA KNOCKOUTS
FOR HIGH VOLTAGE POWER WIRING
TOP VIEW
1 3⁄8″
1″
INLET AIR SLOPE COIL DETAILS
CONNECTION LOCATIONS SHOWN FOR UPFLOW OR HORIZ LEFT APPLICATIONS
FRONT VIEW SHOWN WITH "A" COIL
DETAILS CONNECTION LOCATIONS
FOR UPFLOW OR HORIZ APPLICATIONS
3 1⁄16″
4 11⁄16″
10 3⁄4″9 1⁄2″
LIQUID LINE
CONNECTION
SUCTION LINE CONNECTION
ACCESS PANEL CONFIG FOR
SLOPE COILS
DOWNFLOW OR HORIZ
RIGHT APPLICATIONS
AND "A" COILS
DOWNFLOW APPLICATIONS
INLET AIR
E
LIQUID LINE
CONNECTION
A
1 1⁄4 ″
11⁄16″
UNIT REFRIGERANT CONNECTION SIZES SUCTION: 002 - 3⁄4″ID SWEAT,
ALTERNATE
7⁄8″DIA KNOCKOUT
FOR LOW VOLTAGE
CONTROL WIRING
2 1⁄8″
1″
22 1⁄16″
10 3⁄16″11″
7⁄8″
1 1⁄4 ″
1 1 ⁄2″
2 1⁄2″
19 13⁄16″
19″
INLET AIR
H
RIGHT SIDE VIEW
FOR
MODULAR
UNITS
J
MAX.
ALTERNATE 7⁄8″,
1 3⁄32″, 2″ DIA
KNOCKOUTS FOR HIGH VOLTAGE POWER WIRING OPPOSITE SIDE
NOTE: Modular units
will have a two-piece cabinet.
OUTLET AIR
3⁄4″
OPENING
NOTE:
FITTING PANEL
for service. Allow 21 In. from front
NOTE: Series designation is the 14th position
of unit model number.
003, 005, & 006 - 7⁄8″ID SWEAT
LIQUID: 3⁄8″ID SWEAT
CONDENSATE PAN CONNECTIONS: 3⁄4″FPT
OPTIONAL FIELD CONVERTED RIGHT SIDE RETURN OPENING (SLOPE COIL UNITS ONLY)
2

Fig. 3—Dimensional Drawing
UNIT SIZE H J COIL CONFIGURATION SHIPPING WEIGHT
In. In. Slope "A" Lb.
40FKA
002 — — — Yes 132 003 — 19 Yes — 151 005 — — — Yes 169 006 34-1/16 — — Yes 204
A95536
1⁄2″
TYP*
5⁄16″
TYP*
*HORIZONTAL MOUNT LOCATIONS - DIMPLES PROVIDED IN TOP 
PANEL, AND BACK OF CABINET. IN CABINET BOTTOM, HOLES PROVIDED .136 IN. DIA. HORIZONTAL HANGING HARDWARE TO BE FIELD SUPPLIED.
27⁄8″
5″
DOWNFLOW
(FIELD CONVERTED)
SECONDARY DRAIN
113⁄16″
TYP*
SECONDARY DRAIN
PRIMARY DRAIN
2 3⁄16″
TYP*
(2 PLCS)
1 3⁄16″
HORIZ LEFT
(AS SHIPPED) UPFLOW
(AS SHIPPED)
25⁄8″
7⁄8″
TYP*
PRIMARY DRAIN
11⁄2″
21⁄4″
AIRFLOW
7/16″
TYP
(4 PLACES)*
1″
TYP
(2 PLACES)*
2 7⁄8″
2 3⁄16″
TYP (2 PLACES)*
SECONDARY DRAIN
PRIMARY DRAIN
5⁄16″
TYP*
1 5⁄16″
3 1⁄4″
1″ TYP (2 PLACES)* SECONDARY DRAIN
PRIMARY DRAIN
HORIZ RIGHT
(FIELD CONVERTED)
1 5⁄16″
1 11⁄16″
2″
1⁄2″
TYP*
7⁄8″
TYP*
7⁄8″
TYP*
1⁄2″
TYP*
PRIMARY DRAIN 113⁄16″
TYP*
2 3⁄16″
TYP (2 PLACES)* 3″
5⁄16″
TYP* 3 1⁄8″
43⁄4″
211⁄16″
UPFLOW
(AS SHIPPED)
A–COIL
7⁄16″
TYP  (4 PLACES)*

AIRFLOW
7⁄16″
TYP
(4 PLACES)*
113⁄16″
TYP*
5⁄16″
TYP*
11⁄4″57⁄8″
77⁄8″
11⁄4″
11⁄2″7⁄8″
TYP*
1⁄2″
TYP*
PRIMARY DRAIN
23⁄16″ TYP (2 PLACES)*
31⁄8″
1″ TYP (2 PLACES)*
43⁄4″
HORIZ LEFT
(AS SHIPPED) HORIZ RIGHT
(FIELD CONVERTED)
PRIMARY DRAIN
AIRFLOW
AIRFLOW
SECONDARY DRAIN
SECONDARY DRAIN
F
G
F
G
F
SECONDARY DRAIN

7⁄16″ 
TYP (4 PLACES)*

113⁄16″
TYP*
1″ TYP (2 PLACES)*
DOWNFLOW
(FIELD CONVERTED)
1 11⁄16″
11⁄2″57⁄8″
77⁄8″
SLOPE COIL
SECONDARY DRAIN
PRIMARY DRAIN
3

Carrier Thermidistat™ Control (TSTATCCPRH01-B) is included
with the 40FKA unit. See Back Page for QUICK REFERENCE
COMFORT HEAT SET-UP INSTRUCTIONS.
These units are available for application in systems of 18,000
through 60,000 Btuh nominal cooling capacities. (See Fig. 2 and
3.) Factory-authorized, field-installed electric heater packages are
available in 5 through 30 kw. See Product Data for available
accessory kits.
Before installing or servicing fan coil, 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.
INSTALLATION
Step 1—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.
Step 2—Mount Fan Coil
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 alterative the running of a
separate, secondary condensate line. Consult local codes for
additional restrictions or precautions.
When installing any fan coil over a finished ceiling and/or living
area, installation of a secondary drain pan under entire unit to
avoid damage to ceiling is recommended.
40FKA Fan Coils can be installed for upflow and horizontal-left
applications as factory shipped. Units can be installed for
horizontal-right applications with field modifications. Units may
be converted for downflow applications using factory-authorized
accessory kit.
NOTE: To ensure proper drainage for horizontal installations,
unit must be installed so it is within 1/8 in. level of the length and
width of unit.
UPFLOW INSTALLATION
If return air is to be ducted, install duct flush with floor. Set unit
on floor over opening.
Only use return-air opening provided. All return air must pass
through the coil. (See Fig. 4.)
MODULAR UNITS
The 40FKA Fan Coil in size 006 is a 2-piece modular unit.
Modular construction allows installer to disassemble unit into 2
components, coil box and blower box, for ease of installation. (See
Fig. 5.)
To disassemble unit, remove rear corner brackets by removing 2
screws which secure brackets. (See Fig. 5.) Remove either 2
screws in each front corner of coil box, or 2 screws in blower box.
Do not remove all 4 screws in each corner. (See Fig. 5.) Sections
may now be separated by lifting top section from lower section.
To reassemble, reverse above procedure. Be certain to reinstall all
fasteners when reassembling.
Fig. 4—Slope Coil in Upflow Application A98263
A COIL
UNITS
POWER ENTRY
OPTIONS
LOW VOLT
ENTRY
OPTIONS
FIELD MODIFIED
SIDE RETURN
LOCATION FOR
SLOPE COIL
UNITS ONLY
FIELD SUPPLIED
RETURN PLENUM
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
UNIT
003 A 19 In.
A
1 1⁄2″
2 1⁄2″
19″
FIELD SUPPLIED
SUPPLY DUCT
24-IN. FRONT SERVICE
CLEARANCE
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
4

HORIZONTAL INSTALLATIONS
Be sure installation complies with all applicable building codes
that may require installation of a secondary condensate pan.
1. Arrange support for unit by setting it in or above secondary
condensate pan.
2. When suspending unit from ceiling, dimples in casing indicate
proper location of screws for mounting metal support straps.
(See Fig. 6.)
HORIZONTAL-RIGHT CONVERSION OF UNITS WITH
SLOPE COILS
To convert units for horizontal right installations:
1. Remove blower and coil access panels and fitting panel. (See
Fig. 7.)
2. Remove screw securing coil assembly to right side casing
flange.
3. Remove coil assembly.
4. Lay fan coil on its right side and reinstall coil assembly with
condensate pan down. (See Fig. 7.)
5. Attach coil to casing flange using previously removed coil
mounting screw.
6. Reinstall access panels and fitting panel, aligning holes with
tubing connections and condensate pan connections.
Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating. Install grommets after brazing.
HORIZONTAL RIGHT CONVERSION OF UNITS WITH
A-COIL
To convert units for horizontal right installations:
1. Remove blower and coil access panels. (See Fig. 8.)
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.
b. Remove air splitter (B) from coil seal assembly by remov-
ing 3 screws. (See Fig. 8—factory-shipped inset.)
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 appli-
cation.
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 conden-
sate pan.
Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating.
DOWNFLOW INSTALLATIONS
To convert units for downflow applications, refer to Installation
Instructions supplied with kit for proper installation. For 40FKA
unit size 003, use kit Part No. KFADC0201SLP. For 40FKA unit
sizes 002, 005, and 006 use kit Part No. KFADC0401ACL. Use
fireproof resilient gasket, 1/8- to 1/4-in. thick, between duct, unit,
and floor.
Step 3—Air Ducts
Connect supply-air duct over outside of 3/4-in. flange provided on
supply-air opening. Secure duct to flange with proper fasteners for
type of duct used, and tape duct-to-unit joint.
Duct connection flanges are provided on unit air discharge
connection.
When using 40FKA units with 20-, 24-, and 30-kw electric heaters,
maintain a 1-in. clearance from combustible materials to discharge
plenum and ductwork for a distance of 36 in. from unit. Use
accessory downflow base to maintain proper clearance on down-
flow installations.
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.
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 insula-
tion lining. As an alternative, fibrous ductwork may be used if
constructed and installed in accordance with the latest edition of
Fig. 5—Modular Unit Assembly A95293
2 SCREWS
2 SCREWS
REAR CORNER
BRACKET
BLOWER BOX
COIL BOX 2 SCREWS
5

Fig. 6—Slope Coil in Horizontal-Left Application
A95292
UNIT
FIELD
SUPPLIED
HANGING
STRAPS
LOW VOLT
ENTRY
OPTIONS
POWER
ENTRY OPTIONS
SECONDARY
DRAIN
24-IN.
FRONT SERVICE
CLEARANCE
(FULL FACE
OF UNIT)
SECONDARY
DRAIN
A-COIL
HORIZONTAL LEFT
PRIMARY
DRAIN
PRIMARY
DRAIN
1 3/4 IN.
FILTER ACCESS
CLEARANCE
Fig. 7—Slope Coil in Horizontal-Right Application
COIL MOUNTING
SCREW BLOWER
ASSEMBLY
COIL
SUPPORT
RAIL
SLOPE COIL
SKI
REFRIGERANT
CONNECTIONS PRIMARY DRAIN
OVERFLOW HOLE
DRAINPAN
SECONDARY DRAIN
A95288
6

SMACNA construction standard on fibrous glass ducts. Both
acoustical lining and fibrous ductwork shall comply with National
Fire Protection Association Standards 90A or B as tested by UL
Standard 181 for Class 1 air ducts.
Step 4—Electrical Connections
LINE-VOLTAGE CONNECTIONS
Units with 15- and 20-kw heaters are factory wired for dual-circuit
operation. When single-circuit operation is required, 24- and
30-kw heaters are field convertible, and 15- and 20-kw fused
heaters require the use of factory-authorized adapter kit.
Check all factory wiring per unit wiring diagram and inspect
factory wiring connections to be sure none were loosened in transit
or installation.
Before installing or servicing system, always turn off all
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
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. Electrical shock can cause personal
injury or death.
NOTE: Before proceeding with electrical connections, make
certain that supply voltage, frequency, and phase are as specified
on unit rating plate. Be sure that electrical service provided by the
utility is sufficient to handle the additional load imposed by this
equipment.
See unit wiring label for proper field high- and low-voltage wiring.
Make all electrical connections in accordance with 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.
All units are shipped with power plug and stripped leads for
connection of field wiring to 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 accessory electric heater, remove and discard
power plug from fan coil and connect male plug from heater
to female plug from unit wiring harness. (See Electric Heater
Installation Instructions.)
24-V CONTROL SYSTEM CONNECTIONS TO UNIT
PRINTED-CIRCUIT BOARD (PCB)
Refer to unit wiring instructions for recommended wiring proce-
dures. Use No. 18 AWG color-coded, insulated (35°C minimum)
wires to make low-voltage connections between thermostat and
unit. If thermostat is located more than 100 ft from unit (as
measured along the low-voltage wires), use No. 16 AWG color-
coded, insulated (35°C minimum) wires. PCB is circuited for
single-stage heater operation. When additional heater staging is
desired using 2-stage or outdoor thermostats, see applicable
outdoor unit instructions. Remove Jumper J2 on PCB to enable
staging.
1. The 5-, 8-, and 10-kw heaters are single stage only.
2. The 15- and 20-kw heaters are adaptable for 2-stage operation.
3. The 24- and 30-kw heaters are adaptable for up to 3-stage
operation.
Connect low-voltage leads to thermostat and outdoor unit. (See
Fig. 9, 10, 11, and 12.)
INTELLIGENT HEAT OPTION
Intelligent Heat staging is an element of the Comfort Heat Pump
System. It requires the use of any one the following electric heat
packages:
Fig. 8—A-Coil in Horizontal Right-Application A95286
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT
BRACKET
COIL
SUPPORT
RAIL
COIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIMARY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
REFRIGERANT
CONNECTIONS AIR SEAL
ASSEMBLY
A
B
C
A
B
C
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
HORIZONTAL
RIGHT
APPLICATION
PRIMARY DRAIN
HORIZONTAL LEFT
SECONDARY DRAIN
HORIZONTAL LEFT
7

sequencer heaters KFAEH2501N09, KFAEH2601F15,
KFAEH2801C15, KFAEH1001F24, KFAEH1101F30; or
relay heaters KFCEH1401N09, KFCEH1501F15,
KFCEH1701C15, KFCEH1801F20, KFCEH1901C20,
KFCEH2101F24, KFCEH2201F30.
NOTE: Relay heaters are suggested to maximize comfort during
defrost.
Complete system low-voltage wiring as shown in Fig. 9, 10, 11,
and 12.
NOTE: Where local codes require thermostat wiring be routed
through conduit or raceways, splices can be made inside the fan
coil unit. All wiring must be NEC Class l and must be separated
from incoming power leads.
A factory-authorized disconnect kit is available for installation of
0- through 10-kw applications. When electric heat packages with
circuit breakers are installed, the circuit breaker can be used as a
disconnect.
Transformer is factory wired for 230-v operation. For 208-v
applications, disconnect black wire from 230-v terminal on trans-
former and connect it to 208-v terminal. (See Fig. 13.)
The secondary circuit of transformer is protected by a 5-amp fuse
mounted on printed-circuit board.
IMPORTANT: Do not use outdoor thermostat with Intelligent
Heat.
COMFORT OPTIONS — SUPER COMFORT HEAT AND
SUPER DEHUMIDIFY
Super Comfort Heat and Super Dehumidify options are possible
when the 40FKA Fan Coil is installed with an outdoor temperature
sensor (Comfort Heat only) and the factory supplied Thermidis-
tat™ Control.
Complete the system low voltage wiring as shown in Fig. 9, 10, 11,
and 12.
GROUND CONNECTIONS
Use UL listed conduit and conduit connector to connect supply
wire(s) to unit and obtain proper grounding. Grounding may also
be accomplished by using grounding lug provided in control box.
Use of dual or multiple supply circuits will require grounding of
each circuit to ground lugs provided on unit and heaters.
The cabinet must have an uninterrupted or unbroken ground
according to NEC, ANSI/NFPA 70 and local codes 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.
Failure to follow this warning could result in an electrical
shock, fire, or death.
Step 5—Connect Refrigerant Tubing
This fan coil is supplied with an R-22 TXV factory installed. If
installing with a Puron system, the TXV must be replaced using a
Puron (R-410A) TXV unit. See outdoor unit literature for correct
Kit number.
See Dimensional Drawing for tube connection sizes, type, and
locations. Use accessory tubing package or field-supplied tubing of
refrigerant grade. Insulate entire suction tube if field-supplied
tubing is used. Tubing package has an insulated suction tube. Do
not use damaged, dirty, or contaminated tubing because it may
plug refrigerant flow control device. When tubing package is used
and sweat connections are made within 60 sec, coil and tubing
system does not require evacuation. Always evacuate if field-
supplied tubing is used.
A brazing shield MUST be used when tubing sets are being
brazed to the unit connections to prevent damage to the unit
surface.
Fig. 9—40FKA Fan Coil with 1-Speed Air Conditioner
A98232
O/W2
Y1/W2
W/W1
G
R
W2
Y1
INDOOR CONTROL 40FKA
FAN COIL 1-SPEED
AIR CONDITIONER
W1
G
C
Y
C
DHUM
HUM
B
S1
S2
Y/Y2
R
O
C
DH
HEAT STAGE 2
N/A
HEAT STAGE 1
COOL STAGE 1
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
REMOVE J2 JUMPER
FOR HEAT STAGING
REMOVE
J1 JUMPER
FOR
DEHUMIDIFY
MODES
Fig. 10—40FKA Fan Coil with 2-Speed Air Conditioner
A98233
O/W2
W/W1
Y1/W2
G
R
W2
W1
INDOOR CONTROL 40FKA
FAN COIL 2-SPEED
AIR CONDITIONER
Y1
G
C
Y2
R
Y1
C
DHUM
HUM
B
S1
S2
Y/Y2
R
O
C
DH
HEAT STAGE 2
HEAT STAGE 1
COOL STAGE 1
COOL STAGE 2
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
REMOVE J2 JUMPER
FOR HEAT STAGING
REMOVE
J1 JUMPER FOR
DEHUMIDIFY
MODES
8

To prevent damage to thermostatic expansion valve, remove
sensor bulb from vapor tube while brazing or soldering vapor
connections.
Units have sweat suction and liquid tube connections. Make
suction tube connection first.
1. Cut tubing to correct length.
2. Insert tube into sweat connection on unit until it bottoms.
3. Solder with low-temperature 430°F silver alloy solder.
Wrap a wet cloth around rear of fitting to prevent damage to
factory-made joints.
4. Evacuate coil and tubing system if connections are not made
within 60 sec or tubing package is not used.
Step 6—Condensate Drain
Units are equipped with primary and secondary 3/4-in. FPT drain
connections. For proper condensate line installation see Fig. 4, 6,
7, and 8. 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. 14 and 16.) 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.
Shallow running taps are inadequate and DO NOT allow
proper condensate drainage. (See Fig. 15.)
NOTE: When connecting condensate drain lines, avoid blocking
filter access panel. Prime both primary and secondary condensate
traps after connecting to drain pan.
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 drained to a noticeable place. As an
alternative to using an external condensate pan, some localities
may allow the running of a separate 3/4-in. condensate line (with
appropriate trap) to a place where the condensate will be notice-
able. 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. 16.) 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.
Fig. 11—40FKA Fan Coil with 1—Speed Heat Pump
A98234
O/W2
W/W1
Y1/W2
G
R
O
W2
INDOOR CONTROL 40FKA
FAN COIL 1-SPEED
HEAT PUMP
W1
G
C
Y
R
W2
O
C
DHUM
HUM
B
S1
S2
Y/Y2
R
Y1
C
DH
HEAT STAGE 3
HEAT STAGE 2
HEAT/COOL
STAGE 1
RVS COOLING
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
RVS HEATING
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
REMOVE J2 JUMPER
FOR HEAT STAGING
REMOVE
J1 JUMPER FOR
DEHUMIDIFY
MODES
Fig. 12—40FKA Fan Coil with 2—Speed Heat Pump
O/W2
W/W1
Y1/W2
G
R
O
Y1
INDOOR CONTROL 40FKA
FAN COIL 2-SPEED
HEAT PUMP
W1
G
W2
C
Y2
R
W3
W2
Y1
O
C
DHUM
HUM
B
S1
S2
Y/Y2
R
C
DH
HEAT/COOL
STAGE 1
HEAT STAGE 3
HEAT/COOL
STAGE 2
RVS COOLING
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
RVS HEATING
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
REMOVE J2
JUMPER FOR
HEAT STAGING
REMOVE J1 FOR
DEHUMIDIFY
MODES
A98235
Fig. 13—Transformer Connections A94067
230
C
208
BRN
RED
YEL
BLK
SECONDARY
PRIMARY
9

Condensate drain lines should be pitched downward at a minimum
of 1 in. for every 10 ft. of length. Consult local codes for additional
restrictions or precautions.
Never operate unit without a filter or with filter access door
removed. Damage to blower motor or coil can result.
IMPORTANT: Factory authorized filters must be used when
locating the filter inside the unit. (See Table 2.) For those
applications where access to an internal filter is impractical, a
field-supplied filter must be installed in the return duct system.
Step 7—Unit Start-Up
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
Step 8—Easy Select Configuration Taps
(Detail for Quick Reference Guide on back page.)
EASY SELECT taps are used by the installer to configure a
system. ICM2 motor uses the selected taps to modify its operation
to a pre-programmed table of airflows. Airflows are based on
system size or mode of operation and those airflows are modified
in response to other inputs such as the need for de-humidification.
(See Fig. 19 and 17.)
The 40FKA Fan Coil must be configured to operate properly with
system components with which it is installed. To successfully
configure a basic system (see information printed on circuit board
label located next to select pins), move the 6 select wires to the
pins which match the components used.
AUX HEAT KW/CFM – SELECT HEATER RANGE FOR SIZE
OF ELECTRIC HEATER INSTALLED
Installer must select the auxiliary heat airflow approved for
application with kw size heater installed. If no heater is installed,
this step can be skipped. Each select pin is marked with a range of
heaters for which airflow, also marked, is approved. For increased
comfort select the narrowest kw range matching the heater size, for
example, 0-10 for a 10-kw heater. The heater installed must fall
within the range selected for safe and continuous operation. Note
that airflow marked is the airflow which will be supplied in
emergency heat mode and heating mode on air conditioners when
Fig. 14—Recommended Condensate Trap A95321
2 1⁄4″
2 1⁄4″
UNIT
Fig. 15—Insufficient Condensate Trap A95320
DO NOT USE SHALLOW RUNNING TRAPS!
Fig. 16—Condensate Trap and Unit A98239
FILTER
ACCESS
PANEL
PRIMARY TRAP
(FIELD-SUPPLIED
TRAP REQUIRED)
SECONDARY DRAIN
(FIELD-SUPPLIED
TRAP REQUIRED)
Table 2—Filter Kits
FILTER KIT
(12 PACK)
PART NUMBER SIZE USED WITH
KFAFK0212MED 002,
KFAFK0312LRG 003, 005
KFAFK0412XXL 006
10

electric heat is the primary heating source. In heat pump heating
mode when electric heaters are energized, the ICM2 will run the
higher of heat pump heating airflow and electric heater airflow to
ensure safe heater operation. The factory selection is the largest
heater range approved. (See Fig. 19, A as indicated.)
AC/HP SIZE – SELECT SYSTEM SIZE INSTALLED
The factory setting for air conditioner or heat pump size is the
largest unit meant for application with the model of fan coil
purchased. Installer needs to select air conditioner or heat pump
size to ensure that airflow delivered falls within proper range for
the size unit installed. This applies to all operational modes with
the exception of electric heat modes. (See Fig. 19, B as indicated.)
SYSTEM TYPE – SELECT SYSTEM TYPE INSTALLED AC
OR HP
The type of system must be selected:
1. AC — Air conditioner
2. HP-COMFORT — Provides approximately 315 CFM per ton
for higher normal heating air delivery temperature. Provides
approximately 350 CFM per ton cooling airflow for good
humidity removal.
3. HP-EFF — Provides same airflow for heating and cooling
modes; approximately 350 CFM per ton.
The factory setting is AC. (See Fig. 19, C as indicated.)
Fig. 17—PCB Wiring Arrangement A95276
EASY SELECT D
H
R
W
1
W
2
Y
1
Y/Y
2
G
O
C
HEATER/MOTOR
CEBD430226-01B CESS430226-01B
AUX HEAT KW/CFM
0-30
1075
SEC1 SEC2 J1
J2
AC/HP SIZE
036 030 024 018
AC
HP-COMFORT HP-EFF
NOM HI
ENH
LO
SYSTEM TYPE
AC/HP CFM ADJUST
ON/OFF DELAY
CONTINUOUS FAN
MED HI YELLO AUX1 HUM1
AUX2
24VAC
GRY
HUM2
YEL
WHT
BLK
ORN
BLU
VIO
0-20
875 0-10 725
0
90 30 90 0 0
0-5
625
TM
12-PIN MATE-N-LOCK
ELECTRIC HEAT CONNECTOR
11

AC/HP CFM ADJUST – SELECT MEDIUM, LOW, OR HIGH
AIRFLOW
To provide airflow at rates described above, the AC/HP ADJUST
select is factory set to the nominal (nom) tap. The adjust selections
HI/LO will regulate airflow supplied for all operational modes,
except non-heat pump heating modes, +15 percent and -10 percent
respectively. The adjust selection options are provided to adjust
airflow supplied to meet individual installation needs for such
things as noise, comfort, and humidity removal. (See Fig. 19, D as
indicated.)
ON/OFF DELAY – SELECT DESIRED TIME DELAY PRO-
FILE
Four motor operation delay profiles are provided to customize and
enhance system operation. (See Fig. 19, E as indicated)
Selection options are:
1. The standard 90 sec off delay (Factory setting) at 100 percent
airflow.
2. No delay option used for servicing unit or when a thermostat
is utilized to perform delay functions.
3. A 30 sec on delay with no airflow/90 sec off delay at 100
percent airflow profile is used when it is desirable to allow
system coils time to heat-up/cool-down in conjunction with
the airflow.
4. ENH, enhanced selection, provides a 30 sec on delay with no
airflow/ plus 150 seconds at 70 percent airflow/no off delay
for added comfort. (This profile will minimize cold blow in
heat pump operation and could enhance system efficiency.)
CONTINUOUS FAN — SELECT DESIRED FAN SPEED
WHEN THERMOSTAT IS SET ON CONTINUOUS FAN
1. LO speed — factory setting, 50 percent cooling mode airflow
2. MED speed — move connector to MED, 65 percent cooling
mode airflow.
3. HI speed — move connector of HI, 100 percent cooling mode
airflow. (See Fig. 19, F as indicated.)
LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE
The low-voltage circuit is fused by a board-mounted 5-amp
automotive fuse placed in series with the transformer SEC2 and
the R circuit. The C circuit of the transformer is referenced to
chassis ground through a printed circuit run at SEC1 connected to
metal standoff marked with ground symbol.
BASIC FAN COIL CONFIGURATION
The following basic configuration of the fan coil will provide the
ARI rated performance of the heat pump.
1. AUX HEAT KW/CFM — Select the heater range for the size
electric heater installed.
2. AC/HP SIZE — Select system size installed.
3. SYSTEM TYPE — Select system type HP-EFF.
4. AC/HP CFM ADJUST — Select NOM.
5. ON/OFF DELAY — Select 0/90 profile.
6. CONTINUOUS FAN — Select desired fan speed when
thermostat is set to continuous fan.
COMFORT OPTIONS — SUPER COMFORT HEAT AND
SUPER DEHUMIDIFY MODES
Super Comfort Heat and Super Dehumidify options are possible
when the 40FKA Fan Coil is installed with an outdoor temperature
sensor and the factory supplied Thermidistat™ Control (Comfort
Heat only; Super Dehumidify does not require an outdoor tem-
perature sensor). The following fan coil configuration is recom-
mended for maximum heating and cooling/dehumidifying com-
fort:
NOTE: The 40FKA Fan Coil provides better than average hu-
midity control and heated air temperature. This configuration will
improve the comfort provided by the heat pump system if more
humidity removal or if warmer heating air is desired. While
providing this improved comfort, the heat pump system will
operate efficiently, but not at the published ARI SEER or HSPF
efficiencies.
If the installed heat pump system uses Puron refrigerant, the fan
coil configuration below will provide excellent comfort, but DO
NOT activate the indoor control Comfort Heat configuration
option. Excessive use of the PressureGuard device could result in
its premature failure.
1. AUX HEAT KW/CFM — Select narrrowest heater range to
match size of electric heater installed (skip this step if no
heater is installed).
2. AC/HP SIZE — Select system size installed.
3. SYSTEM TYPE — Select system type HP-COMFORT (for
heat pump system) or AC (for air conditioner system).
4. AC/HP CFM ADJUST — Select LO.
5. ON/OFF DELAY — Select ENH profile.
6. CONTINUOUS FAN — Select desired fan speed when
thermostat is set to continuous fan.
7. If the fan coil is installed with Intelligent Heat Staging capable
electric heaters, remove jumper J2.
NOTE: If configuring to run Super Comfort Heat, do not remove
jumper J2 when using 5-, 8-, or 10-kw heaters.
8. Remove jumper J1 to activate dehumidify modes.
9. Wire low voltage connections for Comfort Options as shown
in Figs. 9, 10, 11, and 12.
10. Configure Thermidistat (or other Super Dehumidify/Super
Comfort Heat capable indoor control) following its installation
instructions for Super Dehumidify and Super Comfort Heat
operation.
This configuration provides the following comfort enhancements:
a. A 30 second blower on delay with 150 seconds at 70
percent airflow to allow the indoor coil to warm up or cool
down before the blower is asked to deliver 100 percent
airflow reducing the cold blow sensation at start up in
heating and allowing the indoor coil to more quickly reach
wet coil operating conditions in cooling.
b. No blower off delay eliminates cold blow which may be
associated with running the blower after shut down of the
compressor and avoids re-evaporation of condensed mois-
ture after cooling/dehumidifying operation.
c. Lower airflow while the compressor is running to reduce
draft effects and increase heating air temperature and
improved humidity control during cooling operation.
d. Intelligent Staging of the electric heater elements to more
closely match heating load requirements and provide more
consistent heating air temperatures.
12

Step 9—ACCESSORY INSTALLATION
ACCESSORY ELECTRIC HEATERS
Electric heaters may be installed with the 40FKA Fan Coil per
instructions supplied with the electric heater package.
NOTE: It is not necessary to cover the opening for accessory
heaters. The unit will perform properly without this opening
covered.
ELECTRONIC AIR CLEANER CONNECTIONS
Because the ICM2 blower motor used in the 40FKA Fan Coil is
controlled by low-voltage signals, a switched 230-vac electronic
air cleaner power signal is not available. This signal is replaced by
a 24-vac signal which is provided at PCB terminals AUX1 and
AUX 2 (See Fig. 17 and 19.) This signal is present whenever the
G thermostat signal is present (heat pump heating, cooling and
continuous blower modes). When the 40FKA Fan Coil is installed
with an electronic air cleaner, use EAC relay kit Part No.
KFAIR0201ACR or a field supplied 24-vac relay.
NOTE: The 40FKA blower operates in some modes without a G
signal.
If the 40FKA Fan Coil is installed with an air conditioner and
electic heat is the primary source of heat, install a thermostat which
turns on the G output with a call for heat or a corporate thermostat
with its "fan on with W operation" enabled to energize an air
cleaner or humidifier through the AUX and HUM outputs of the
Easy Select PC board. Alternately an airflow sensor may be
installed with the air cleaner.
HUMIDIFIER CONNECTIONS
Terminals HUM1 and HUM2 are provided for direct connection to
the low-voltage control of a humidifier through a standard humi-
distat. (See Fig. 17.) These terminals are energized with 24vac
when G thermostat signal is present. (See Fig. 18.) Alternately, the
24-vac signal may be sourced from the W and C terminal block
connections when electric heaters are used as the primary heating
source. When using a Thermidistat™ Control the 24-vac signal
may be sourced directly from the HUM terminal. (See Figs. 9, 10,
11, and 12.)
Step 10—40FKA Fan Coil Sequence Of Operation
The 40FKA will supply airflow in a range which is more than
twice the range of a standard fan coil. It is designed to provide
nominal cooling capacities at a 50°F evaporator temperature and
the required airflow which enables it to match with 4 air condi-
tioner or heat pump system sizes. Table 1 outlines the CFM range
for the different 40FKA Fan Coil sizes.
Table 1–CFM Range for 40FKA Units
FAN COIL SIZE SYSTEM SIZES CFM RANGE
40FKA002 018, 024, 030, 036 450-1275
40FKA003 024, 030, 036, 042 525-1475
40FKA005 030, 036, 042, 048 550-1700
40FKA006 036, 042, 048, 060 550-2150
CONTINUOUS FAN
1. Thermostat closes circuit R to G
The blower runs at continuous fan airflow.
COOLING MODE — SINGLE SPEED OR 2-SPEED HIGH
1. Thermostat closes circuits R to G, R to Y/Y2 and R to O
The fan coil delivers single speed cooling airflow.
2. Thermostat closes circuits R to G, R to Y1, R to Y2 and R to
O
The fan coil delivers 2-speed high cooling airflow.
COOLING MODE — 2-SPEED LOW
1. Thermostat closes circuits R to G, R to Y1 and R to O
The fan coil delivers 2-speed low cooling airflow.
COOLING MODE — DEHUMIDIFICATION
1. Thermostat or Thermidistat closes circuits R to G, R to O, and
R to Y/Y2 (or R to Y1 for 2-speed low), and humidistat or
Thermidistat opens R to DH
The fan coil delivers airflow which is approximately 80
percent of the nominal cooling airflow to increase the latent
capacity of the system.
COOLING MODE — SUPER DEHUMIDIFY OPERATION
NOTE: The indoor control used, such as a Thermidistat, must be
capable of providing Super Dehumidify operation mode and
control must be configured as outlined in its installation instruc-
tions. Consult indoor control literature to determine if control is
capable and for configuration instructions.
1. If the indoor temperature is below the temperature set point
and the humidity is greater than the humidity set point, the
Thermidistat closes circuit R to O, opens circuits R to DH and
R to G, and cycles circuit R to Y/Y2 (for single speed system
R to Y1, or R to Y1 and Y/Y2 for 2-speed system).
The ICM2 motor reads the G signal to the fan coil while the
heat pump is operating, circuit R to Y/Y2 for single speed
system, R to Y1 or R to Y1 and Y/Y2 for 2-speed system,
closed (24 vac). If circuit R to G is closed (24 vac), the
motor will deliver airflow at the full cooling or cooling plus
dehumidify mode requested value. If circuit R to G is open
(0 vac) for super dehumidify mode, the motor delivers
reduced airflow to maximize the humidity removal of the
system while minimizing overcooling.
ELECTRIC HEAT HEATING MODE
1. Thermostat closes circuit R to W/W1, or W2
The fan coil delivers the selected electric heat airflow.
HEAT PUMP HEATING MODE — SINGLE SPEED OR
2-SPEED HIGH
1. Thermostat closes circuits R to G and R to Y/Y2
The fan coil delivers single speed heat pump heating airflow.
2. Thermostat closes circuits R to G, R to Y1 and R to Y/Y2
The fan coil delivers 2-speed high heat pump heating airflow.
HEAT PUMP HEATING MODE — 2-SPEED LOW
1. Thermostat closes circuits R to G and R to Y1
The fan coil delivers 2-speed heat pump heating low airflow.
HEAT PUMP HEATING WITH AUXILIARY ELECTRIC
HEAT
1. Thermostat closes circuits R to G, R to Y/Y2 and/or R to Y1
with R to W/W1 or W2 (and R to O in the case of defrost)
In the event that electric heating is called for by the
thermostat while the heat pump is also operating in either
heating or defrost modes, the motor will modify its airflow
output, if necessary, to provide an airflow which is defined
as safe for the operation of the electric heater during heat
pump operation. That airflow is the greater of the heat pump
heating airflow and the electric heater only airflow.
Fig. 18 — Humidifier Wiring A95317
HUMIDISTAT
TO HUMIDIFIER
HUMIDIFIER WIRING
HUM 1
(C)
HUM 2
(G)
24-VAC
13

HEATING MODE — COMFORT HEAT OPERATION
NOTE: The indoor control used, such as a Thermidistat, must be
capable of providing Comfort Heat operation mode and control
must be configured as outlined in its installation instructions. The
system must be installed with appropriate outdoor temperature
sensor. Consult indoor control literature to determine if control is
capable and for configuration instructions. Consult indoor control
instructions and sensor instructions for sensor installation details.
1. If the outdoor temperature is in the range of 10° to 40°F, the
Thermidistat closes circuit R to Y/Y2 (for single speed system
R to Y1, or R to Y1 and Y/Y2 for 2-speed system) and opens
circuit R to G.
The ICM2 motor reads the G signal to the fan coil. If circuit
R to G is closed (24 vac), the motor will deliver airflow at
the full heating requested value. If circuit R to G is open (0
vac) for maximum heating comfort, the motor delivers
reduced airflow to maximize the temperature and minimize
the draft effect of the heated air leaving the fan coil.
CARE AND MAINTENANCE
For continuing high performance, and to minimize possible
equipment failure, it is essential that periodic maintenance be
performed on this equipment. The only required maintenance that
may be performed by the consumer is filter maintenance.
Disconnect all power to unit before servicing field wires or
removing control package. The disconnect (when used) on
access panel does not disconnect power to the line side of
disconnect, but does allow safe service to all other parts of
unit. If unit does not have a disconnect, disregard the
foregoing. Instead, make sure that a disconnecting means is
within sight from, and is readily accessible from, the unit.
Disconnect all electrical power to unit before performing any
maintenance or service on it. A failure to follow this warning
can cause electrical shock, fire, personal injury, or death.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect and clean or replace air filter each month or as
required.
2. Inspect cooling coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean as necessary. An inspec-
tion port is provided on all A-coil delta plates. Remove plastic
plug to inspect.
3. Inspect blower motor and wheel for cleanliness each heating
and cooling season. Clean as necessary.
4. Inspect electrical connections for tightness and controls for
proper operation each heating and cooling season. Service as
necessary.
Consult fan coil service manual available from equipment distribu-
tor for maintenance procedures.
As with any mechanical equipment, personal injury can result
from sharp metal edges, etc, therefore, care should be taken
when removing parts.
Using Owner’s/User Manual furnished in outdoor unit, the install-
ing technician should explain to the consumer system operation
with particular emphasis on indoor fan coil operation sounds and
filter maintenance.
14

15

Fig. 19—40FKA Printed CIrcuit Board with Comfort Heat Pump Set-up Guide A98290
EASY SELECT DH
R
W1
W2
Y1
Y/Y2
G
O
C
HEATER/MOTOR
CEBD430226-01B CESS430226-01B
AUX HEAT KW/CFM
0-30
1075
SEC1 SEC2 J1
J2
AC/HP SIZE
036 030 024 018
AC
HP-COMFORT HP-EFF
NOM HI
ENH
LO
SYSTEM TYPE
AC/HP CFM ADJUST
ON/OFF DELAY
CONTINUOUS FAN
MED HI YELLO AUX1 HUM1
AUX2
24VAC
GRY
HUM2
YEL
WHT
BLK
ORN
BLU
VIO
0-20
875 0-10 725
0
90 30 90 0 0
0-5
625
TM
LOW VOLTAGE TERMINAL BLOCK
MOLEX 12-PIN CONNECTOR
A
B
C
D
E
F
QUICK REFERENCE GUIDE
COMFORT HEAT PUMP SET-UP INSTRUCTIONS
A. AUX HEAT - Set for heater size (Ex: 0-10 for 10 kw)
B. AC/HP SIZE - Set for size of outdoor unit
C. SYSTEM TYPE - Select "HP COMFORT"
D. AC/HP CFM ADJUST - Select "LO"
E. ON/OFF DELAY - Select "ENH"
F. CONTINUOUS FAN - Leave on "LO"
2. Install heater with Intelligent Heat Staging, and remove
Jumper J2, except when using 5-, 8-, or 10-kw heater.
3. Remove Jumper J1 to activate all dehumidify modes.
4. Complete wiring and install outdoor temperature sensor according
to Installation Instructions.
1. Configuration Taps
(See Installation Instructions, for detailed description.)
• Option 5 (Variable Speed Motors) - set to ON
• Option 7 (Super Dehumidify) - set to ON
• Option 9 (Intelligent Heat) - set to ON if installing with
a single speed heat pump
• Option 12 (Heaters during Defrost) - setting "2" is
suggested for all heaters
• Option 16 (Super Comfort Heat) - set to ON for R-22
systems. For Puron applications, set to OFF.
2. Thermidistat Control Configurations
(See Thermidistat™ Control Installation Instructions for
detailed description.)
1. Set "DIP Switches" - Set the dip switches appropriate for
the specific system being installed.
EASY SELECT BOARD
THERMIDISTAT™ CONTROL SETTINGS
Copyright 1998 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 40fk1si
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 2e 3d PC 101 Catalog No. 534-021 Printed in U.S.A. Form 40FK-1SI Pg 16 5-98 Replaces: New