Carrier EHC05CKN User manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Installing and servicing of heating and air conditioning equipment can be
hazardous due to system pressures and electrical components. Only
trained personnel should install or service heating and air conditioning
equipment.
Untrained personnel can perform basic maintenance functions such as
cleaning coils, or cleaning and replacing filters. All other operations
should be performed by trained personnel. When working on heating
and air conditioning equipment, observe precautions in literature, on
tags, and on labels attached to the unit.
Follow all safety codes. Wear safety glasses and work gloves. Have a
fire extinguisher available.
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 CAUTION.
These words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices, which
may 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.
NOTE: Use an accessory downflow base to maintain proper clearance
on downflow installations.
EHC
Electric Heater Packages
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before beginning any installation or modification, be sure the main
electrical disconnect switch(es) is in the OFF position. There may be
more than one power supply. Tag the disconnect switch(es) with a
suitable warning label.
Table 1 – EH Heater Table
HEATER
PART NO.
kW
@ 240V VOLTS/PH STAGES (kW OPERATING)
INTERNAL CIRCUIT
PROTECTION
FAN COIL SIZE USED
WITH
HEATING CAP.*
@ 230V
*. Does not include heat from blower motor.
EHC05CKN 5 230/1 5 None 18†
†. Size 18 fan coil has a special 6-pin connector. Do not modify wiring.
15,700
EHC07CKN 8 230/1 8 None 18†25,100
EHC10CKN 10 230/1 10 None 18†31,400
EHC05BKN 5 230/1 5 None 24–60 15,700
EHC07BKN 8 230/1 8 None 24–60 25,100
EHC10BKN 10 230/1 10 None 24–60 31,400
EHC20BKF 20 230/1 5, 20 Fuse‡
‡. Single point wiring kit required for these heaters.
30–60 62,800
EHC05CKB 5 230/1 5 Circuit Breaker 18†15,700
EHC07CKB 8 230/1 8 Circuit Breaker 18†25,100
EHC10CKB 10 230/1 10 Circuit Breaker 18†31,400
EHC05BKB 5 230/1 5 Circuit Breaker 24–60 15,700
EHC07BKB 8 230/1 8 Circuit Breaker 24–60 25,100
EHC10BKB 10 230/1 10 Circuit Breaker 24–60 31,400
EHC20BKB 20 230/1 5, 20 Circuit Breaker 30–60 62,800
EHC09BKCN 9 230/1**
**. Field convertible to 3 phase.
3, 9 None 36–60 28,200
EHC15BKF 15 230/1 5, 15 Fuse‡24–60 47,100
EHC15BKB 15 230/1 5, 15 Circuit Breaker 24–60 47,100
3 Phase Only
EHC15BHN 15 230/3 5, 15 None 36–60 47,100
EHC18BHN 18 230/3 6, 12, 18 None 42–60 56,500
3 Phase, Factory Shipped (field convertible to single phase)
EHC25BHCF 24 230/3 8, 16, 24 Fuse 48, 60 78,300
EHC30BHCF 30 230/3 10, 20, 30 Fuse 48, 60 94,100

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
This instruction describes the installation of Part No. EHC accessory
heaters in FJM and WBHL fan coils.
Procedure 1 — Install Electric Heater Assembly
NOTE: Ensure heater coils are not deformed or damaged during heater
installation.
1. Make sure power to unit is off.
2. Remove blower access panel of fan coil unit.
3. Disconnect 2 power wires (black and yellow pigtail leads) from
PCB or wire harness (if applicable) and discard. Wires may be part
of a plug assembly or attached to terminals L1 and L2. Remove
cooling control plate from fan coil (if equipped). For 18-, 24-, and
30-kW heaters, remove adapter plate (Fig. 1).
A90154
Fig. 1 – Installation of 18-, 24-, and 30-kW Model Heaters
4. Insert heater assembly into front of fan coil so that element rods
engage holes in rear heat shield.
5. Attach heater control plate to fan coil using 2 screws provided. For
18-, 24-, and 30-kW heater models, attach front of heater to fan
deck using third screw (Fig. 1).
Procedure 2 — Attach Fuse Box or Circuit Breaker
Box
1. For 15- and 20-kW fused models:
After installing heater assembly, attach fuse assembly to side of fan
coil unit by inserting fuse box tab between insulation and to left
side of unit and fan deck. Mount front of assembly to side flange
with 2 screws provided. On fan coil units size 42 and larger, remove
wire tie that shortens wire length between heater and fuses. Fuse
cover is closed by engaging dimples in fuse box (Fig. 2).
2. For 24- and 30-kW fused models:
Fuse assembly is mounted on heater. Be sure fuse cover is closed by
engaging clip latch on unit top panel (Fig. 1)
WARNING
!
FIRE HAZARD
Failure to follow this warning may cause personal injury, death, or
property damage.
Flame resistant materials must be used for ductwork for fan coils with
combustible clearance requirements.
For FJMA4X24-60 3- through 18 kW standard heaters, there are no
combustible clearance requirements for the first 36 in. (914 mm) of
ductwork. For FJMA4X18L0A/B and WBHL184AA/B with 8 kW and
10 kW heaters, a 1 in. (25 mm) combustible clearance is required for
the first 12 in. (305 mm) of ductwork. For 20 kW through 30 kW
heaters, a 1 in. (25 mm) combustible clearance is required for the first
36 in. (914 mm) of ductwork.
CAUTION
!
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Before installation of heater, the black and yellow pigtail leads must be
removed from the fan coil PCB or wire harness to prevent possible
damage to the product. Electrical power will be provided to the board
through the heater circuit plug.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Ensure fuse box is closed before power is turned to ON position. There
may be more than one power supply.

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
A90151
Fig. 2 – Installation of Fused Model Heater
3. For 5- through 20-kW circuit breaker models:
After installing heater assembly, attach circuit breaker assembly to
unit with screws provided (Fig. 3). On fan coil units size 42 and
larger, remove wire tie that shortens wire length between heater and
circuit breaker assembly to allow mounting of circuit breaker
assembly (Fig. 3).
A90153A
Fig. 3 – Installation of Circuit Breaker Model Heater
4. Circuit breaker models require installing a window bezel in unit
door to provide safe access to circuit breakers. The window bezel
mounts on the outside of the blower door (Fig. 4).
a. Cut insulation away from rectangular access hole in blower
access panel.
b. Remove adhesive backing from window bezel and from the
outside. Insert the window through the rectangular hole and seat
firmly on the door surface. Press firmly in place to seat the
adhesive (Fig. 4).
A03069
Fig. 4 – Installation of Window Bezel for Circuit Breaker Model
Heater
Procedure 3 — Electrical Connections
Refer to unit instructions for recommended wiring procedures. Install
wiring in accordance with all applicable local and national codes, see
Table 2 and Table 3. Connect heater wiring harness plug to receptacle on
PCB or wire harness. A positive connection must be made between plug
and receptacle. Plug will interlock with receptacle when properly seated.
Harness contains both 24V control and high-voltage wiring. Blower
power is provided through heater harness.
NOTE: Units with or without electric heaters require a minimum CFM.
Refer to unit wiring label to ensure the fan speed selected with electric
heaters is equal to or greater than the minimum fan speed indicated. The
minimum CFM for cooling is determined by the outdoor unit
requirements. Use the higher of the 2 for year-round operation.
Wire 24V Control Systems
1. Connections to Unit
Use No. 18 AWG color-coded, insulated (35°C minimum) wire to
make low-voltage connections between thermostat, fan coil unit,
and outdoor unit. If thermostat is located more than 100 ft (20 m)
from unit (as measured along the low-voltage wire), use No. 16
AWG color-coded, insulated (35°C minimum) wire. All wiring
must be separated from line voltage power leads. Refer to outdoor
unit wiring instructions for additional wiring procedure
recommendations.
2. Transformer
Transformer is factory wired for 230V operation. For 208V
applications, disconnect black wire on transformer 230-v terminal
and reconnect it to 208V terminal (Fig. 5). The secondary circuit of
transformer is protected by a 5A fuse mounted on PCB.
A94067
Fig. 5 – Connection of Transformer

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
For 3 kW through 10 kW non-fused or non-circuit
breaker models:
Refer to unit Installation Instructions for recommended wiring
procedures.
Install wiring in accordance with all applicable local and national codes
(see Table 2 and Table 3).
3 kW through 10 kW non-fused or non-circuit breaker models have high
voltage terminal block to connect the high voltage field wiring as shown
in Fig. 6.
A221146
Fig. 6 – 3kW through 10kW High Voltage Terminal Block for High
voltage field Wiring
1. Connect heater wiring harness plug to receptacle on PCB or wire
harness. A positive connection must be made between plug and
receptacle. Plug will interlock with receptacle when properly
seated. Harness contains both 24V control and high voltage wiring.
Blower power is provided through heater harness.
2. Heater Staging
If electric heat staging is required, a multi-stage heating room
thermostat is required. Consult your equipment supplier for a
suitable thermostat.
a. The 3-, 5-, 8-, and 10-kW heaters are single stage only.
b. The 9- and 15-kW heaters are adaptable for 2-stage operation.
c. The 18-, 20-, 24-, and 30-kW heaters are adaptable for 3-stage
operation.
3. Rectifier and Time Delay Boards
Each heater element is controlled by a relay mounted on the heater
panel. The relay has a 24V DC coil. Each relay has a small rectifier
board attached directly to relay coil terminals. The rectifier board
converts incoming 24V AC control signal to DC. Some heaters may
have up to three relays. The second and/or third relay rectifier board
also has a time delay feature and a small jumper wire built into it.
With the jumper uncut, the time delay allows the second-stage heat
to be energized approximately 5 seconds after the first stage. On
18-, 24-, and 30-kW heaters, the third-stage relay board jumper is
cut at the factory. This provides an 8-second delay after first-stage
relay closes.

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
Table 2 – Electric Heater Electrical Data
FC
Size HEATER PART NO. kW
P
H
A
S
E
Internal
Circuit
Protection
HEATER AMPS*
208/230V†
*. Includes blower motor amps of largest fan coil used with heater. Consult Product Data for specific motor amps.
†. For 240V, multiply 230V heater amps by 1.04. Wire sizing and over-current protection may need adjustment per local code requirements.
MIN AMPACITY
208/230V†
BRANCH CIRCUIT
Min Wire Size (AWG)
208/230V‡
‡. Copper wire must be used. If other than uncoated (non-plated), 75°C ambient, copper wire (solid wire for smaller, and stranded wire for larger than 10 AWG) is used, consult applicable tables of the National Electric Code (ANSI/NFPA 70).
Min Gnd Wire Size
208/230V‡Max Fuse/Ckt Bkr
Amps 208/230V
Single
Circuit
Dual Circuit Single
Circuit
Dual Circuit Single
Circuit
Dual Circuit Single
Circuit
Dual Circuit Single
Circuit
Dual Circuit
240V 208V L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4
24-42 EHC05BKN 5 3.8 1 None 17.8/19.7 — — 27.5/29.9 — — 10/10 — — 10/10 — — 30/30 — —
24-42 EHC05BKB 5 3.8 1 Ckt Bkr 17.8/19.7 — — 27.5/29.9 — — 10/10 — — 10/10 — — 30/30 — —
48-60 EHC05BKN 5 3.8 1 None 17.8/19.7 — — 29.9/32.3 — — 10/8 — — 10/10 — — 30/35 — —
48-60 EHC05BKB 5 3.8 1 Ckt Bkr 17.8/19.7 — — 29.9/32.3 — — 10/8 — — 10/10 — — 30/35 — —
18 EHC05CKN 5 3.8 1 None 17.8/19.7 — — 25.9/28.3 — — 10/10 — — 10/10 — — 30/30 — —
18 EHC07CKB 5 3.8 1 Ckt Bkr 17.8/19.7 — — 25.9/28.3 — — 10/10 — — 10/10 — — 30/30 — —
24-60 EHC07CKN 8 6.0 1 None 28.5/31.5 — — 43.3/47.0 — — 8/8 — — 10/10 — — 45/50 — —
24-60 EHC07BKB 8 6.0 1 Ckt Bkr 28.5/31.5 — — 43.3/47.0 — — 8/8 — — 10/10 — — 45/50 — —
18 EHC07CKN 8 6.0 1 None 28.5/31.5 — — 39.3/43.0 — — 8/8 — — 10/10 — — 40/45 — —
18 EHC07CKB 8 6.0 1 Ckt Bkr 28.5/31.5 — — 39.3/43.0 — — 8/8 — — 10/10 — — 40/45 — —
24-60 EHC10BKN 10 7.5 1 None 35.6/39.4 — — 52.1/56.9 — — 6/6 — — 10/10 — — 60/60 — —
24-60 EHC10BKB 10 7.5 1 Ckt Bkr 35.6/39.4 — — 52.1/56.9 — — 6/6 — — 10/10 — — 60/60 — —
18 EHC10CKN 10 7.5 1 None 35.6/39.4 — — 48.1/52.9 — — 8/6 — — 10/10 — — 50/60 — —
18 EHC10CKB 10 7.5 1 Ckt Bkr 35.6/39.4 — — 48.1/52.9 — — 8/6 — — 10/10 — — 50/60 — —
30-60 EHC09BKCN**
**. Field convertible to 3 phase.
9 6.8 1 None 32.2/35.6 — — 47.9/52.1 — — 8/6 — — 10/10 — — 50/60 — —
30-60 EHC09BKCN 9 6.8 3 None 18.6/20.6 — — 30.9/33.4 — — 8/8 — — 10/10 — — 40/40 — —
24-60 EHC15BKF††
††. Single circuit application of F15 and F20 heaters requires single-point wiring kit accessory.
15 11.3 1 Fuse 53.4/59.1 35.6/39.4 17.8/19.7 74.4/81.5 52.1/56.9 22.3/24.6 4/4 6/6 10/10 8/8 10/10 10/10 80/90 60/60 25/25
24-60 EHC15BKB 15 11.3 1 Ckt Bkr 53.4/59.1 35.6/39.4 17.8/19.7 74.4/81.5 52.1/56.9 22.3/24.6 4/4 6/6 10/10 8/8 10/10 10/10 80/90 60/60 25/25
36-60 EHC15BHN 15 11.3 3 Fuse 30.8/34.1 — — 46.1/50.3 — — 8/6 — — 10/10 — — 50/60 — —
42-60 EHC18BHN 18 13.5 3 None 37.2/41.2 — — 54.1/59.1 — — 6/6 — — 10/10 — — 60/70 — —
30-60 EHC20BKF†† 20 15.0 1 Fuse 71.2/78.8 35.6/39.4 35.6/39.4 96.6/106.1 52.1/56.9 44.5/49.3 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 45/50
30-60 EHC20BKB 20 15.0 1 Ckt Bkr 71.2/78.8 35.6/39.4 35.6/39.4 96.6/106.1 52.1/56.9 44.5/49.3 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 45/50
48-60 EHC25BHCF‡‡
‡‡. Field convertible to 1 phase, single or multiple supply circuit.
24 18.0 3 Fuse 49.3/54.6 — — 69.3/75.9 — — 4/4 — — 8/8 — — 80/80 — —
48-60 24 18.0 1 Fuse 85.5/94.5 — — 114.5/125.8 — — 2/1 — — 6/6 — — 125/150 — —
48-60 EHC30BHCF‡‡ 30 22.5 3 Fuse 61.7/68.2 — — 84.8/92.9 — — 4/3 — — 8/8 — — 90/100 — —
48-60 30 22.5 1 Fuse 106.8/118.1 — — 141.1/155.3 — — 0/00 — — 6/6 — — 150/175 — —
Table 3 – Field Multipoint Wiring or 24- and 30-kW Single Phase
HEATER PART NO. kW PHASE HEATER AMPS 208/230V MIN AMPACITY 208/230V*
*. Includes blower motor amps of largest fan coil used with heater.
MIN WIRE SIZE (AWG)
208/230V†
†. Copper wire must be used. If other than uncoated (non-plated), 75°C ambient, copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the NEC (ANSI/NFPA 70).
MIN GND
WIRE SIZE
208/230V
MAX FUSE/CKT BKR AMPS
208/230V
240V 208V L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6
EHC25BHCF‡
‡. Field convertible to 1 phase, single or multiple supply circuit.
24 18.0 1 28.5/31.5 28.5/31.5 28.5/31.5 43.3/47.0 35.6/39.4 35.6/39.4 8/8 8/8 8/8 10/10 50/50 40/40 40/40
EHC30BHCF‡A30 22.5 1 35.6/39.4 35.6/39.4 35.6/39.4 52.1/56.9 44.5/49.3 44.5/49.3 6/6 8/8 8/8 10/10 60/60 45/50 45/50

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
Power Connections
NOTE: Heater supply circuit wire size and over-current protection must
comply with National Electrical Code (NEC) and UL branch circuit
requirements, see Table 2 and Table 3. Wires and over-current
protection, integral to the heater, are not required to meet branch circuit
requirements. Internal circuit protection of 60A (maximum) is
acceptable.
1. Unprotected heaters: See Fig. 7, Fig. 11, and Fig. 12.)
a. The 5- through 10-kW single-phase and 15- and 18-kW 3-phase
heaters can be wired for single-supply circuit only. Supply circuit
connects to terminal block. For 15 and 18kW 3-phase heaters,
wire the supply circuit to the heater pigtail leads.
b. The 3- through 10-kW single-phase heaters can use a separate
field-installed, factory-authorized disconnect kit which installs in
the fan coil.
NOTE: Refer to wiring label for component locations.
c. The 9-kW heater is factory wired for a single supply circuit,
single phase. To convert the heater to a single supply circuit,
3-phase:
(1.) Disconnect the blue wire from Relay 1, Terminal 6. Cut,
strip, and connect to field wire L3.
(2.) Disconnect the yellow wire from Relay 3, Terminal 6 and
connect to Relay 1, Terminal 6.
(3.) Disconnect the blue wire from Relay 3, Terminal 2 and
connect to Relay 3, Terminal 6.
2. Circuit breaker heaters: See Fig. 8 and Fig. 10.
a. The 3- through 10-kW heaters can be wired for a single-supply
circuit only.
b. The 15- and 20-kW heaters can be wired for dual-supply circuits
only.
A221145
Fig. 7 – 3, 5, 8, 9 10 kW Non-fused Heaters (9 kW is field convertible
to 3-phase. See (Power Connections on p6).
A00077
Fig. 8 – 5, 8 10 kW Circuit Breaker and Disconnect Heaters
A00078
Fig. 9 – 15 and 20 kW Fused Heaters (15 and 20 kW fused heaters
are factory wired for dual supply circuits. Single supply circuit is
possible with approved single point wiring kit.)
A00079
Fig. 10 – 15 and 20 kW Circuit Breaker Heaters
A00080
Fig. 11 – 15 kW 3-Phase Heater
A00081
Fig. 12 – 18 kW 3-Phase Heater
3. Fused heaters: See Fig. 9, Fig. 13, Fig. 14, and Fig. 15.
a. The 15- and 20-kW heaters can be wired for single- or
dual-supply circuits. Single-supply circuit wiring requires a
factory-authorized, single-point adapter kit.
b. The 24- and 30-kW heaters can be wired for single- or
multiple-supply circuits. Heaters are factory wired for single
circuit 3-phase. To convert heaters to single-circuit single-phase,
disconnect the yellow lead from L3 and connect it to L1.
Disconnect the black lead from L3 and connect it to L2. To
convert heaters to multiple-supply circuit single-phase, remove
and discard the leads between the single-circuit terminal block
Ground
Lug
Field
Power
Wiring
Field
Ground
Wiring
L1
L2
ON
OFF

EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
and fuse block. Remove and discard the single-circuit terminal
block. Attach L1 through L6 power leads as indicated on the
label next to the fuse block.
A00082
Fig. 13 – 24 and 30 kW Heaters (3-Phase Wiring Factory Supplied)
A00083
Fig. 14 – 24 and 30 kW Heaters
(Single Phase, Single Supply Circuit-Field Modified)
A00084
Fig. 15 – 24 and 30 kW Heaters
(Single Phase, Multiple Supply Circuits-Field Modified)
Ground Connections
NOTE: Use UL-listed conduit and conduit connector for connecting
supply wire(s) to unit to obtain proper grounding. If the conduit
connection uses reducing washers, a separate ground wire must be used.
Grounding may also be accomplished by using grounding lugs provided
in the control box.
1. For unprotected or single-circuit heaters, one (1) equipment ground
connection is provided on the fan coil unit (Fig. 1 or Fig. 2).
2. For 15- and 20-kW circuit breaker heaters, an additional ground lug
is provided on the circuit breaker mounting bracket for dual-circuit
grounding (Fig. 3).
3. For 15- and 20-kW fused heaters, an additional ground lug is
provided on the fuse mounting bracket for dual-circuit grounding
(Fig. 2).
4. For 24- and 30-kW fused heaters, two (2) additional ground lugs
are provided for single-phase, multi-circuit wiring (Fig. 1).
Fan Speeds for FJ4 and PF4MNX
1. Speed tap selection is done at the fan relay. To change motor
speeds, disconnect the fan lead on the relay and replace with the
motor speed tap desired. Save the insulating cap and place it on the
motor lead that was removed from the relay (Fig. 16). Refer to
Table 4 for further clarification of speed tap selections.
A94068
Fig. 16 – PSC Motor Speed Tap and Fan Relay
Table 4 – Color Code for Motor Lead Wires FJ4 and PF4MNX
FJ4 and PF4MNX with Discrete Tap BLDC Motors
1. Speed tap selection is done at the motor terminals. To change motor
speed, disconnect the motor lead from the factory terminal and
move it to the desired speed tap based on published airflow tables
and desired unit function.
2. Electric heat (white wire) should remain plugged into Tap 4.
Procedure 4 — Conversion of Circuit Breaker for
Downflow Applications
1. Tag and disconnect factory wiring from terminals on circuit
breaker(s).
2. Pull the white plastic release tab on the bottom of circuit breaker
straight out to release the circuit breaker from the bracket (Fig. 17).
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
According to NEC, ANSI/NFPA 70, and local codes, cabinet must have
an uninterrupted or unbroken ground to minimize personal injury if an
electrical fault should occur. The ground may consist of electrical wire
or metal conduit when installed in accordance with existing electrical
codes. (See Gound/Conduit NOTE below.)
MOTOR SPEED TAP WIRE COLOR
Common Yellow
High Black
Medium Blue (Factory selected)
Low Red (Blue on 2-speed models)

© 2023 Carrier. All rights reserved.
A Carrier Company
Edition Date: 1/23 Catalog No: IIK-EHC-01
Replaces: New
EHC: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
3. Remove the quick connect adapters from the factory side of the
breaker(s). Reinstall the adapters on the other end of the
breakers(s). Be sure the adapter is located between the lug screw
and plate. Torque the lug screw to 30 in-lb.
4. Rotate the breaker 180° from its original position and reinstall in
the bracket. Slide the breaker slot into the sheet metal tab and snap
the breaker into place. Make sure both tabs engage the breaker.
Reconnect wiring on the opposite end. Make sure the wires are
positioned as before.
5. Remount the circuit breaker bracket into the unit so that the switch
will be in the UP position when ON.
A99094
Fig. 17 – Conversion of Circuit Breaker
Procedure 5 — Attach Wiring Diagram and Rating
Label
Attach the heater rating label included with the kit over the existing
electrical information label located on the front access panel of the fan
coil (Fig. 18). If the kit contains multiple rating labels, make sure the
correct label is applied (check phase and supply circuits). Affix the
wiring diagram label #3, included with the kit, on the blower housing
above the fan coil wiring label. Do not cover up the existing wiring label.
NOTE: The fact there is a label #3 does not imply there should be label
#1 or #2. These kits have only one wiring label – label #3.
A96251
Fig. 18 – Heater Rating Label Location
Procedure 6 — Verify Installation
After completion of the heater installation, check the wiring to ensure
tightness and that proper connections and routings have been made.
Make sure all electrical covers are in place and proper labels have been
applied. Reinstall the blower access panel before turning on the unit
power.