Carrier 40FKA User manual

40FKA
Comfort Heat Pump System
002-006
Installation Instructions
NOTE: Read entire manual before starting installation.
This symbol →indicates a change from the last publication.
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. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
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 3d 2e PC 101 Catalog No. 534-011 Printed in U.S.A. Form 40FK-5SI Pg 1 7-00 Replaces: 40FK-3SI

INTRODUCTION
Model 40FKA Fan Coil units are designed for flexibility and can
be used for upflow, horizontal, or downflow applications. A
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. 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. (See Figs. 2, 4, and 7.) Units can
be installed for horizontal-right applications with field modifica-
tions. 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. 2.)
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. 3.)
To disassemble unit, remove rear corner brackets by removing 2
screws which secure brackets. (See Fig. 3.) 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. 3.) 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.
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. 4.)
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.
To convert units for horizontal right installations:
1. Remove blower and coil access panels and fitting panel. (See
Fig. 5.)
2. Remove screw securing coil assembly to right side casing
flange.
3. Remove coil assembly.
4. Insulate TXV sensing bulb with cork tape or other permanent
insulating material. (See Fig. 5.)
5. Lay fan coil on its right side and reinstall coil assembly with
condensate pan down. (See Fig. 5.)
6. Attach coil to casing flange using previously removed coil
mounting screw.
7. 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. 6.)
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. 6.)
b. Remove air splitter (B) from coil seal assembly by remov-
ing 3 screws. (See Fig. 6—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.
2

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 seal duct-to-unit joint.
Duct connection flanges are provided on unit air discharge
connection.
When using 40FKA units with 18-, 20-, 24-, and 30-kw electric
heaters, maintain a 1-in. clearance from combustible materials to
→Fig. 2—Slope Coil in Upflow Application A00091
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
002-005 21-IN.
006
Fig. 3—Modular Unit Assembly A95293
2 SCREWS
2 SCREWS
REAR CORNER
BRACKET
BLOWER BOX
COIL BOX 2 SCREWS
3

→Fig. 4—Slope Coil in Horizontal-Left Application (Factory-ready) A00096
UNIT
FIELD
SUPPLIED
HANGING
STRAPS
LOW VOLT
ENTRY
OPTIONS
POWER
ENTRY OPTIONS
SECONDARY
DRAIN
002-005 21-IN.
006 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. 5—Slope Coil in Horizontal-Right Application A99033
COIL MOUNTING
SCREW BLOWER
ASSEMBLY
TXV SENSING
BULB MUST BE
INSULATED
COIL
SUPPORT
RAIL
SLOPE COIL
SKI
REFRIGERANT
CONNECTIONS PRIMARY DRAIN
OVERFLOW HOLE
DRAINPAN
SECONDARY DRAIN
4

→Fig. 6—A-Coil in Horizontal Right-Application A00071
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
HORIZONTAL
RIGHT
APPLICATION
→Fig. 7—A-Coil in Horizontal Left Application (Factory-ready) A00072
A
B
C
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
AIR SEAL
ASSEMBLY
HORIZONTAL
DRAIN PAN
REFRIGERANT
CONNECTIONS
SECONDARY DRAIN
HORIZONTAL LEFT
PRIMARY DRAIN
HORIZONTAL LEFT
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT
BRACKET
COIL
BRACKET
5

discharge plenum and ductwork for a distance of 36 in. from unit.
Use accessory downflow base to maintain proper clearance on
downflow 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
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
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.
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.
LINE-VOLTAGE CONNECTIONS
If unit contains an 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 Instruc-
tions.)
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.
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 condensa-
tion.
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.
Fig. 8—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. 9—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
6
→

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 outdoor thermostats or Intelligent Heat staging,
remove Jumper J2 on PCB to enable staging.
Connect low-voltage leads to thermostat and outdoor unit. (See
Fig. 8, 9, 10, and 11.)
INTELLIGENT HEAT STAGING 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: relay heaters KFCEH1401N09, KFCEH1501F15,
KFCEH1701C15, KFCEH1801F20, KFCEH1901C20,
KFCEH2101F24, OR KFCEH2201F30.
Complete system low-voltage wiring as shown in Figs. 8, 9, 10,
and 11.
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. 12.)
The secondary circuit of transformer is protected by a 5-amp fuse
mounted on printed-circuit board.
IMPORTANT: Do not use outdoor thermostat kit with Intelligent
Heat staging.
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 (Super Comfort Heat only) and the factory supplied
Thermidistat™ Control or Comfort Zone II.
Complete the system low voltage wiring as shown in Fig. 8, 9, 10,
and 11.
Fig. 10—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. 11—40FKA Fan Coil with 2—Speed Heat Pump
A98235
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
Fig. 12—Transformer Connections A94067
230
C
208
BRN
RED
YEL
BLK
SECONDARY
PRIMARY
7

GROUND CONNECTIONS
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.
(See Ground/Conduit Note below.) Failure to follow this
warning could result in an electrical shock, fire, or death.
NOTE: Use UL listed conduit and conduit connector to connect
supply wire(s) to unit and obtain proper grounding. If conduit
connection uses reducing washers, a separate ground wire must be
used. 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.
Step 5—Refrigerant Tubing Connection and Evacuation
This fan coil is supplied with an R-22 TXV factory installed. If
installing as part of a Puron® system, the TXV must be replaced
using a Puron TXV. See outdoor unit literature for correct Puron
TXV Kit number.
See Dimensional Drawing in Product Data for tube connection
sizes, type, and locations. Use accessory tubing package with
insulated suction tube, or field-supplied tubing of refrigerant
grade. Insulate entire suction tube if field-supplied tubing is used.
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 coil and
field-supplied tubing to 500 microns before opening outdoor unit
service valves.
A brazing shield MUST be used when tubing sets are being
brazed to the unit connections to prevent damage to the unit
surface. Braze with Sil-Fos or Phos-copper on copper to
copper joints. Wrap a wet cloth around rear of fitting to
prevent damage to TXV.
To prevent damage to thermostatic expansion valve, remove
sensor bulb from vapor tube while brazing 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. Braze with Sil-fos or Phos-copper.
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 Figs. 2, 4,
5, 6, and 7. 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. 13 and 15.) Factory-approved condensate traps are
available (Kit No. KFAET0125ETK). Be sure to install plastic
push-in plugs in unused condensate drain fittings. It is recom-
mended 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 traps are inadequate and DO NOT allow
proper condensate drainage. (See Fig. 14.)
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 use 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. 15.) 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. 13—Recommended Condensate Trap
A95321
2 1⁄4″
2 1⁄4″
UNIT
Fig. 14—Insufficient Condensate Trap A95320
DO NOT USE SHALLOW RUNNING TRAPS!
8
→

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 1.) 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. (See Tables 2 and 3.)
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 Figs. 16 and 18.)
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 10-kw heater. This airflow must be greater than
the minimum CFM for electric heater application with the size
system installed for safe and continuous operation. (See Tables 4
and 5 for airflow delivery and minimum CFM.) Note that airflow
marked is the airflow which will be supplied in emergency heat
mode and heating mode on air conditioners when 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.)
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. HI provides 15 percent
airflow over nominal unit size selected and LO provides 10 percent
airflow below nominal unit size selected. 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.)
Fig. 15—Condensate Drain A99040
FILTER
ACCESS
PANEL
PRIMARY TRAP REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
SECONDARY DRAIN REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
Table 1—Filter Kits
FILTER KIT
(12 PACK)
PART NUMBER SIZE USED WITH
KFAFK0212MED 002,
KFAFK0312LRG 003, 005
KFAFK0412XXL 006
9

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
Fig. 16—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
10

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 (Super
Comfort Heat only; Super Dehumidify does not require an outdoor
temperature sensor). The following fan coil configuration is
recommended for maximum heating and cooling/dehumidifying
comfort:
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
→Table 2—40FKA Fan Coil Airflow Delivery (CFM) in Cooling Mode
UNIT
SIZE
OUTDOOR
UNIT
CAPACITY
OPERATING MODE—COOLING
FAN ONLY
LO/MED/HI
Single-Speed
Application
Two-Speed
Application
High Speed Low Speed
Nominal
A/C
Cooling
A/C
Cooling
Dehumidity
Nominal
A/C
Cooling
A/C
Cooling
Dehumidity
Nominal
A/C
Cooling
A/C
Cooling
Dehumidity
002
018
024
030
036
525
700
875
1050
420
560
700
840
–
–
–
1100
–
–
–
880
–
–
–
680
–
–
–
545
350/350/525
350/455/700
440/570/875
525/680/1050
003
024
030
036
042
700
875
1050
1225
560
700
840
980
–
–
1100
–
–
–
880
–
–
–
680
–
–
–
545
–
415/455/700
440/570/875
525/680/1050
610/795/1225
005
030
036
042
048
875
1050
1225
1400
700
840
980
1120
–
1100
–
1470
–
880
–
1175
–
680
–
910
–
545
–
725
440/570/875
525/680/1050
610/795/1225
700/910/1400
006
036
042
048
060
1050
1225
1400
1750
840
980
1120
1400
1100
–
1470
1835
880
–
1175
1470
745
–
995
1240
595
–
795
995
525/745/1050
610/870/1225
700/995/1400
875/1240/1750
NOTE: 1. The above airflows result with the AC/HP CFM ADJUST select jumper set on NOM.
2. Airflow can be adjusted +15% or -10% by selecting HI or LO respectively for all modes except fan only.
3. Dry coil at 230 volts and with 10kw heater and filter installed.
4. Airflows shown are at standard air conditions.
→Table 3—40FKA Fan Coil Airflow Delivery (CFM) in Heat Pump Only Heating Mode
UNIT
SIZE
OUTDOOR
UNIT
CAPACITY
OPERATING MODE—HEAT PUMP ONLY HEATING
FAN ONLY
LO/MED/HI
Single-Speed
Application
Two-Speed
Application
High Speed Low Speed
Heat Pump
Comfort Heat Pump Efficiency Heat Pump Comfort Heat Pump Efficiency Heat Pump Comfort Heat Pump Efficiency
002
018
024
030
036
470
630
785
945
525
700
875
1050
–
–
–
990
–
–
–
1100
–
–
–
615
–
–
–
680
350/350/470
350/410/630
440/510/785
525/615/945
003
024
030
036
042
630
785
945
1100
700
875
1050
1225
–
–
990
–
–
–
1100
–
–
–
615
–
–
–
680
–
415/415/630
440/510/785
525/615/945
610/715/1100
005
030
036
042
048
785
945
1100
1260
875
1050
1225
1400
–
990
–
1320
–
1100
–
1470
–
615
–
820
–
680
–
910
440/510/785
525/615/945
610/715/1100
700/820/1260
006
036
042
048
060
945
1100
1260
1575
1050
1225
1400
1750
990
–
1325
1655
1100
–
1470
1835
670
–
895
1120
745
–
995
1240
525/670/945
610/780/1100
700/895/1260
875/1120/1575
NOTE: 1. The above airflows result with the AC/HP CFM ADJUST select jumper set on NOM.
2. Airflow can be adjusted +15% or -10% by selecting HI or LO respectively for all modes except fan only.
3. Dry coil at 230 volts and with 10kw heater and filter installed.
4. Airflows shown are at standard air conditions.
11

Table 4—40FKA Electric Heater Airflow Delivery (CFM)
FAN
UNIT
SIZE
OUTDOOR
UNIT
CAPACITY
BTUH
ELECTRIC HEATER KW RANGE
0—5 0—10 0—15 0—20
LO NOM HI LO NOM HI LO NOM HI LO NOM HI
002
18,000 625 625 625 675 675 675 * * * * * *
24,000 650 725 835 * 725 835 875 875 875 * * *
30,000 815 905 1040 * 905 1040 900 900 1040 1100 1100 1100
36,000 980 1085 1250 980 1085 1250 980 1085 1250 1100 1100 1250
003
24,000 675 725 835 875 875 875 * * * * * *
30,000 815 905 1040 875 905 1040 1100 1100 1100 * * *
36,000 980 1085 1250 980 1085 1250 1100 1100 1250 1225 1225 1250
42,000 1140 1270 1460 1140 1270 1460 1140 1270 1460 1225 1270 1460
UNIT
FAN
SIZE
OUTDOOR
UNIT
CAPACITY
BTUH
ELECTRIC HEATER KW RANGE
0—10 0—15 0—20 0—30
LO NOM HI LO NOM HI LO NOM HI LO NOM HI
005
30,000 975 975 1040 1100 1100 1100 * * * * * *
36,000 980 1085 1250 1100 1100 1250 1250 1250 1250 * * *
42,000 1140 1270 1460 1140 1270 1460 1250 1270 1460 1500 1500 1500
48,000 1305 1450 1665 1305 1450 1665 1305 1450 1665 1500 1500 1665
006
36,000 1100 1100 1250 1350 1350 1350 * * * * * *
42,000 1140 1270 1460 1350 1350 1460 1525 1525 1525 * * *
48,000 1305 1450 1665 1350 1450 1665 1525 1525 1665 1750 1750 1750
60,000 1630 1810 2085 1630 1810 2085 1630 1810 2085 1750 1810 2085
* Airflow not recommended for heater/system size.
NOTE: LO, NOM, and HI refer to AC/HP CFM ADJUST selection.
Table 5—40FKA Minimum CFM for Electric Heater Application
FAN
COIL
UNIT
HEAT PUMP
UNIT
SIZE
CFM
HEATER SIZE KW
5 8, 9, 10 15 18, 20 24, 30
002
Heater Only 625 625 725 875 —
018 625 625 — — —
024 650 725 875 — —
030 800 875 875 1040 —
036 970 970 970 1040 —
003
Heater Only 675 700 1050 1050 —
024 675 875 1050 — —
030 800 875 1100 — —
036 975 975 1100 1225 —
042 1125 1125 1125 1225 —
005
Heater Only 675 700 1050 1050 1400
030 800 875 1100 — —
036 975 975 1100 1225 —
042 1125 1125 1125 1225 —
048 1305 1305 1305 1305 1400
006
Heater Only 1050 1050 1050 1050 1750
036 1100 1100 1350 1350 —
042 1125 1125 1350 1350 —
048 1300 1300 1350 1465 1750
060 1625 1625 1625 1750 1750
NOTES:
1. Heater Only—Air conditioner with electric heater application.
2. These airflows are minimum acceptable airflows as UL listed. Actual airflow delivered will be per airflow delivery chart for Electric Heating Modes.
12

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 Super 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. 8, 9, 10, and 11.
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.
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: Units installed without elecric heat should have a field-
supplied sheet metal block off plate covering the heater opening.
This will reduce air leakage and formation of exterior condensa-
tion.
AUXILIARY TERMINALS
The AUX and HUM terminals on the Easy Select Board are tied
directly to the G terminal, and provide a 24-vac signal whenever
the G terminal is energized. (See Figs 16 and 19.) During Super
Comfort Heat and Superdehumidify modes, the G signal is not
present and the auxiliary terminals are not energized. If the
installation includes the use of these operation modes, it is
recommended you do not use these terminals to control accesso-
ries. See Electronic Air Cleaner and Humidifier sections for further
information.
ELECTRONIC AIR CLEANER (EAC) CONNECTIONS
The AUX1 and AUX2 terminals are not always energized during
blower operation, as described above. When using an electronic air
cleaner with the 40FKA Fan Coil and Super Comfort Heat or
Super Dehumidity modes, use Airflow Sensor Part No.
KEAAC0101AAA. The airflow sensor turns on electronic air
cleaner when the fan coil blower is operating.
HUMIDIFIER CONNECTIONS
The HUM1 and HUM2 terminals are not always energized during
blower operation, as described under Auxiliary Terminals Section.
To ensure humidifier will operate properly during Super Comfort
Heat mode, use HUM output of Thermidistat Control or Comfort
Zone II to control humidifier operation. Alternatively, the 24-vac
signal can be sourced from the W and C terminal block connec-
tions when electric heaters are used as the primary heating source,
or if another humidistat is desired to control the humidifier. (See
Figs. 8, 9, 10, and 11.)
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 6 outlines the CFM range
for the different 40FKA Fan Coil sizes.
Table 6—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.
13
→
→
→

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.
HEATING MODE — SUPER COMFORT HEAT OPERATION
NOTE: The indoor control used, such as a Thermidistat, must be
capable of providing Super Comfort Heat operation mode and
control must be configured as outlined in its installation instruc-
tions. 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.
Step 11—Troubleshooting ICM Motor and Controls
High voltage is always present at motor. Disconnect power to
unit before removing or replacing connectors or servicing
motor. Wait at least 5 min after disconnecting power before
opening motor.
The ICM motor used with this product contains two parts: the
control module and motor winding section. Do not assume the
motor or module is defective if it will not start. Go through the
steps described below before replacing control module, Easy
Select Board or entire motor. The control module is available as a
replacement part.
IF MOTOR TURNS SLOWLY:
1. Replace panel. Motor may appear to run slowly if access panel
is removed.
2. It is normal operation to run noticeably slower if G terminal is
not energized in cooling or heat-pump modes.
IF MOTOR DOES NOT RUN:
Turn off power and check the following:
1. Check 5 amp fuse on Easy Select Board.
2. Check for 24vac on SEC1 and SEC2. If no voltage is present,
check transformer.
3. Check all plugs and receptacles for any deformation which
could cause loose connections. Be sure plugs are fully seated.
4. Verify that approximately 230vac is present at motor.
5. Verify low-voltage control signals to motor (See troubleshoot-
ing example). The motor receives its control signals through
the 12-pin plug (PL-1) on Easy Select Board and 16-pin plug
on wiring harness. The combinations of pins energized will
determine motor speed. (See Fig. 17.) See Table 7 for circuit
board low-voltage screw terminals energized and for voltage
present at each pin on 12-pin plug (PL-1). See Table 7 for pin
number on 16-pin plug which should have voltage when Easy
Select Board screw terminals have 24vac.
USE FOLLOWING PROCEDURE TO CHECK CONTROL SIG-
NALS:
Thermostat
1. Remove all thermostat wires from Easy Select Board.
2. Jumper screw terminals (1 at a time): R-G, R-Y/Y2, R-Y1,
R-W1. If motor runs in all cases, thermostat is miswired,
configured incorrectly or defective. If motor runs in some
cases, but not others, continue to check wiring harness and
circuit board.
Wiring Harness
1. Shut off power to unit; wait 5 min.
2. Remove 5-pin plug from motor.
3. Remove 16-pin from motor.
4. Replace 5-pin plug and turn power on.
5. Check for appropriate voltages on 16-pin connector with
screw terminals jumpered. (See Table 7 for values and see
example below.)
If signals check correctly and motor does not run, inspect wiring
harness for loose pins or damaged plastic that could cause poor
connections. If connections are good, either control module or
motor is defective. If proper signals are not present, check circuit
board using procedure below:
14
→
→

12-pin Plug (PL-1) on Easy Select Board
1. Unplug harness from board.
2. Check for appropriate voltages on pins with Easy Select Board
screw terminals jumpered. (See Table 7 for values and see
example below.)
If proper signals are not present, replace Easy Select Board. If
present at board and not at 16-pin connector, wiring harness is
defective.
Troubleshooting Example:
Motor is not running on a call for heat-pump heating. System is a
single-speed heat pump.
1. After performing checks in Thermostat section, follow steps 1
thru 5 in Wiring Harness section. Then proceed with example.
2. With all thermostat wires removed from Easy Select Board,
place a jumper wire between R and Y/Y2 low-voltage screw
terminals on the Easy Select board.
3. Check Table 7 for pin number on 16-pin connector associated
with the Y/Y2 signal. The correct pin is #14. The far right
column shows that (-) 12vdc should be present between pin
#14 and pin #1 (common) on the 16-pin connector.
4. Set meter to read DC voltage. Place meter between pins #1
and #14 and check for (-) 12vdc (common side of meter on pin
#1). If signal is present, the problem is in the module or motor.
If signal is not, problem is either in wiring harness or Easy
Select Board.
These steps can be repeated for other modes of operation.
To check Easy Select Board:
1. Leave jumper wire in place between R and Y/Y2.
2. Check Table 7 under "Wiring Harness Connection to Easy
Select Board" column and row for pin #14 to see pin# on Easy
Select Board that should have voltage. The correct pin is #2.
The column on far right will show voltage that should be
present between pin #2 and #9 (or #10 common).
3. Place meter between pins #2 and #9 on Easy Select Board and
check for (-) 12vdc.
4. If voltage is present, the wiring harness is bad; if not, the Easy
Select Board is bad.
VERIFY MOTOR WINDING SECTION:
Before proceeding with module replacement, check the following
to ensure motor winding section is functional. With control module
removed and unplugged from winding section:
1. The resistance between any 2 motor leads should be similar.
2. The resistance between any motor lead and the unpainted
motor end plate should be greater than 100K ohms.
If motor winding section fails one of these tests, it is defective and
must be replaced.
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.
→Fig. 17—Control Signals (Easy Select Board & 16-Pin Plug) A00114
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
J2 JUMPER – PULL FOR
HEAT STAGING
12-PIN CONNECTOR
(PL–1) PIN 1
PIN 12
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
16-PIN PLUG
DEHUMIDIFICATION INPUT
24 VAC HOT
AUXILARY HEAT STAGE 1
AUXILIARY HEAT STAGE 2
LOW SPEED COMPRESSOR
SINGLE OR HI SPEED COMPRESSOR
FAN
REVERSING VALVE
COMMON
J1 JUMPER – PULL FOR
DEHUMIDIFICATION CONTROL LOW VOLTAGE SCREW TERMINALS
15
→

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 system operation to the consumer
with particular emphasis on indoor fan coil operation sounds and
filter maintenance.
→Table 7—Wiring Connections of FK Fan Coil Wiring Harness
16-PIN PLUG ON WIRING HARNESS TO MOTOR WIRING HARNESS CONNECTION TO EASY SELECT BOARD
Pin # on 16-Pin Plug Description Pin # on 12-Pin Plug
or Set-up Selection Wire Color Signal on Pin with
Screw Terminal Jum-
pered to R*
1Common Pin 9 on PL-1 Brown
2W1 Auxiliary Heat Stage 1 Pin 7 on PL-1 Violet 24VAC**
3Common Pin 10 on PL-1 Orange
4On/Off Delay Selection On/Off Delay Selection White
5AC/HP Size Selection AC/HP Size Selection Blue
6Y1 Low Speed AC or HP Pin 3 on PL-1 Black (-) 12VDC**
7AC/HP CFM Adjust
Selection AC/HP CFM Adjust Selection Black
8Not Used N/A Not Used
9System Type Selection System Type Selection Orange
10 Dehumidify Pin 12 on PL-1 Gray 0 V (24VAC on no call)
11 Aux Heat Size
Selection Aux Heat Size Selection Violet
12 24v AC Pin 8 on PL-1 Red 24VAC continuous
13 W2 Auxiliary Heat Stage 2 Pin 4 on PL-1 White 24VAC**
14 Y/Y2 Single Speed AC or HP, High Speed
2-Speed AC or HP Pin 2 on PL-1 Yellow (-)12VDC**
15 G Fan Pin 1 on PL-1 Green 24VAC**
16 Not Used N/A Not Used
* Check voltages with 16-Pin Plug disconnected from motor.
** These signals will start motor.
16

Fig. 18—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
17

18

19

Copyright 2000 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 40fk5si
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 3d 2e PC 101 Catalog No. 534-011 Printed in U.S.A. Form 40FK-5SI Pg 20 7-00 Replaces: 40FK-3SI