Carrier KFCEH0401N03 User manual

NOTE: Read the entire instruction manual before starting the installation.
This symbol →indicates a change since the last issue.
SAFETY CONSIDERATIONS
Installing and servicing 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 service personnel. When working on heating and air conditioning equipment, observe precautions in the 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, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER
identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE
is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
WARNING: Before beginning any installation or modification, be sure the main electrical disconnect switch is in the
OFF position. Tag the disconnect switch with a suitable warning label. Electrical shock can cause personal injury or death.
Fig. 1—Installation of 18-, 24-, and 30-kw Model Heaters A90154
MULTI-CIRCUIT
GROUND LUG
TERMINAL
BLOCK
SINGLE-CIRCUIT
GROUND LUG
ADAPTER PLATE
(MUST BE REMOVED WHEN
INSTALLING LARGE HEATER)
FUSE BLOCK
(24- AND 30-KW)
FUSE COVER
(OMITTED ON 18-KW)
CLIP LATCH
Installation Instructions
KFCEH
Electric Heater
Packages
Form: AG-FCEH-09 Cancels: AG-FCEH-08 Printed in U.S.A. 4-03 Catalog No. 63FC-EH7

INTRODUCTION
This instruction describes the installation of Part No. KFCEH accessory heaters in FA, FB, FC, FH, FX, and PF1MNB018-070 fan coils and in
the FE4, FK4, FV4, 40FK, and PF1MNA071 fan coils.
NOTE: Electric heaters require a minimum airflow. Minimum airflow and motor speed selection are listed in Table 2. For 3- through 18-kw
standard heaters there are no clearance requirements for the first 36 in. of ductwork. For 20- through 30-kw heaters, a 1-in. clearance is required
for the first 36 in. of ductwork. INSTALLATION
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.
CAUTION: 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.
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. (See Fig. 1.)
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. (See Fig. 1.)
→Table 1—Accessory Heater Usage
ELECTRIC HEATER
PART NO. KW INTERNAL PROTECTION MODEL FA, FB, PF SIZE MODEL FC SIZE MODEL FH SIZE MODEL FX SIZE
MODEL
FE4, FK4, FV4, 40FK
SIZE
FK, FV, 40FK
INTELLIGENT
HEAT CAPABLE
1 Phase
KFCEH0401N03 3 Non-fused 018, 024 024 001 — — NO
KFCEH0501N05
KFCEH2401C05 5Non-fused Circuit Breaker 018-071 024-070 001-004 030-060 001-006 NO NO
KFCEH0801N08
KFCEH2501C08 8Non-fused Circuit Breaker 018-071 024-070 001-004 030-060 001-006 NO NO
KFCEH2901N09 9* Non-fused 036-071 036-070 002-004 036-060 003-006 YES†
KFCEH0901N10
KFCEH2601C10 10 Non-fused Circuit Breaker 018-071 024-070 001-004 030-060 001-006 NO NO
KFCEH3001F15
KFCEH2701C15
KFCEH3101C15 15 Fused
Circuit Breaker
Circuit Breaker 024-071 024-070 001-004 030-060 001-006 YES†
YES†
YES†
KFCEH3201F20
KFCEH2801C20
KFCEH3301C20 20 Fused
Circuit Breaker
Circuit Breaker 030-071 030-070 002-004 030-060 001-006 YES†
YES†
YES†
3 Phase Only
KFCEH1601315 15 Non-fused 036-071 036-070 002-004 036-060 001-006 NO
KFCEH2001318 18 Non-fused 042-071 042-070 003, 004 042-060 003-006 NO
3 Phase, Factory Shipped‡
KFCEH3401F24
KFCEH3501F30 24 30 Fused Fused 048-071 048-070 003, 004 048-060 005, 006 YES† YES†
† These heaters are Intelligent Heat capable when used with the FK4, FV4, and 40FK fan coils and corporate 2-speed programmable thermostat (TSTATXXP2S01-B),
Thermidistat™ Control (TSTATXXPRH01-B), or capable zoning system.
‡ Field convertible to 1 phase, single or multiple supply circuit.
* Field convertible to 3 phase.
Table 2—Minimum CFM and Motor Speed Selection
FAN COIL
SIZES
FA, FB, FC, FH, FX,
PF
HEATER KW
3 5 8 9 10 15 18 20 24 30
018 525 525 525 — 600* — — — — —
024 700 700 700 700 700 775* — — — —
030, 033 — 875 875 875 875 875 — 1060* — —
036, 038, — 1050 970 970 970 920 — 1040 — —
042 — 1225 1225 1225 1225 1225 1225 1225 — —
048, 054, — 1400 1400 1400 1400 1400 1400 1400 1400 1400
060, 070, — 1750 1750 1750 1750 1750 1750 1750 1750 1750
* Indicates medium speed (blue). All other motor speeds at low tap.
—2—

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 042 and larger, remove wire
tie that shortens wire length between heater and fuses. Fuse cover is closed by engaging dimples in fuse box. (See 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. (See Fig. 1.)
WARNING: Ensure fuse box is closed before power is turned to ON position. Electrical shock may cause personal
injury or death.
3. For 5- through 20-kw circuit breaker models:
After installing heater assembly, attach circuit breaker assembly to unit with screws provided. (See Fig. 3.) On fan coil units size 042 and
larger, remove wire tie that shortens wire length between heater and circuit breaker assembly to allow mounting of circuit breaker assembly.
(See Fig. 3.)
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. (See 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. (See Fig. 4.)
PROCEDURE 3—ELECTRICAL CONNECTIONS
Refer to unit instructions for recommended wiring procedures. Install wiring in accordance with all applicable local and national codes. (See Tables
3, 4, and 5.)
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 24-v 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.
Fig. 2—Installation of Fused Model Heater A90151
DUAL-CIRCUIT
GROUND LUG
FUSE BOX
DIMPLE
FUSE BOX TAB
SINGLE-CIRCUIT
GROUND LUG
INSERT FUSE
BOX TAB HERE COVER PLATE
OR
KNOCKOUT
FUSE COVER
WIRE TIE
(REMOVE ON
LARGE FAN COILS)
HEATER/CUTOUT
COVER
—3—
→
→
→

→Table 3—Electric Heater Electrical Data
HEATER PART NO. KW PHASE INTERNAL
CIRCUIT
PROTECTION
HEATER AMPS
208/230V MIN AMPACITY
208/230V**
BRANCH CIRCUIT
Min Wire Size (AWG)
208/230v†† Min Gnd Wire Size
208/230v Max Fuse/Ckt Bkr Amps
208/230v Max Wire Length
208/230v (Ft)‡‡
Single
Circuit Dual Circuit 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 L1,L2 L3,L4
KFCEH0401N03 3 2.3 1 None 10.9/12.0 ——15.9/17.3 ——12/12 ——12/12 ——20/20 ——67/68 ——
KFCEH0501N0515 3.8 1 None 18.1/20.0 ——26.0/28.4 ——10/10 ——10/10 ——30/30 ——66/66 ——
KFCEH0501N0525 3.8 1 None 18.1/20.0 ——31.2/33.5 ——8/8 ——10/10 ——35/35 ——85/88 —— KFCEH2401C0525 3.8 1 Ckt Bkr 18.1/20.0 ——31.2/33.5 ——8/8 ——10/10 ——35/35 ——85/88 ——
KFCEH2401N08 8 6.0 1 None 28.9/32.0 ——44.7/48.5 ——8/8 ——10/10 ——45/50 ——59/60 ——
KFCEH2501C08 8 6.0 1 Ckt Bkr 28.9/32.0 ——44.7/48.5 ——8/8 ——10/10 ——45/50 ——59/60 ——
KFCEH2901N09*** 9 6.8 1 None 32.8/36.0 ——49.5/53.5 ——8/6 ——10/10 ——50/60 ——54/87 ——
KFCEH2901N09‡9 6.8 3 None 18.8/20.8 ——32.0/34.5 ——8/8 ——10/10 ——35/35 ——83/85 ——
KFCEH0901N10 10 7.5 1 None 36.2/40.0 ——53.8/58.5 ——6/6 ——10/10 ——60/60 ——78/80 —— KFCEH2601C10 10 7.5 1 Ckt Bkr 36.2/40.0 ——53.8/58.5 ——6/6 ——10/10 ——60/60 ——78/80 ——
KFCEH3001F15*** 15 11.3 1 Fuse 54.2/59.9 36.2/40.0 18.1/20.0 76.3/83.4 53.8/58.5 22.7/25.0 4/4 6/6 10/10 8/8 10/10 10/10 80/90 60/60 25/25 88/89 78/80 75/76
KFCEH2701C15*** KFCEH3101C15*** 15 11.3 1 Ckt Bkr —36.2/40.0 18.1/20.0 —53.8/58.5 22.7/25.0 —6/6 10/10 —10/10 10/10 —60/60 25/25 —78/80 75/76
KFCEH1601315 15 11.3 3 None 31.3/34.6 ——47.7/51.8 ——8/6 ——10/10 ——50/60 ——56/90 —— KFCEH2001318 18 13.5 3 None 37.6/41.5 ——55.5/60.4 ——6/6 ——10/8 ——60/70 ——76/77 ——
KFCEH3201F20*** 20 15.0 1 Fuse 72.3/79.9 36.2/40.0 36.2/40.0 98.9/108.4 53.8/58.5 45.3/50.0 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 50/50 85/109 78/80 59/59
KFCEH2801C20*** KFCEH3301C20*** 20 15.0 1 Ckt Bkr —36.2/40.0 36.2/40.0 —53.8/58.5 45.3/50.0 —6/6 8/8 —10/10 10/10 —60/60 50/50 —78/80 59/59
KFCEH3401F24†*** 24 18.0 3 Fuse 50.1/55.4 ——71.2/77.8 ——4/4 ——8/8 ——80/80 ——94/95 ——
24 18.0 1 Fuse 86.7/95.5 ——116.9/127.9 ——1/1 ——6/6 ——125/150 ——115/116 ——
KFCEH3501F30†*** 30 22.5 3 Fuse 62.6/69.2 ——86.8/95.0 ——3/3 ——8/8 ——90/100 ——97/98 ——
30 22.5 1 Fuse 109.0/120.0 ——144.8/158.5 ——0/00 ——6/6 ——150/175 ——117/150 ——
Table 4—Smart Heat Electrical Data
HEATER PART NO. KW PHASE INTERNAL
CIRCUIT
PROTECTION
HEATER AMPS
208/230V MIN AMPACITY
208/230V**
BRANCH CIRCUIT
Min Wire Size (AWG)
208/230v†† Min Gnd Wire Size
208/230v Max Fuse/Ckt Bkr Amps
208/230v Max Wire Length
208/230v (Ft)‡‡
Single
Circuit Dual Circuit 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 L1,L2 L3,L4
KFCEH0101H10 9 6.8 1 None 32.5/35.9 ——44.0/48.3 ——8/8 ——10/10 ——45/50 ——60/61 ——
KFCEH0201H15 15 11.3 1 Fuse 54.2/59.9 39.7/43.9 14.4/16.0 73.2/80.3 49.7/54.9 23.4/25.4 4/4 8/6 10/10 8/8 10/10 10/10 80/90 50/60 25/30 92/92 53/85 73/74 KFCEH0301H20 20 15.0 1 Fuse 72.3/79.9 36.2/40.0 36.2/40.0 97.2/106.7 52.0/56.8 45.3/50.0 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 50/50 87/111 81/82 93/93
Table 5—Field Multipoint Wiring or 24- and 30-Kw Single Phase
HEATER PART NO. KW PHASE HEATER AMPS
208/230V MIN AMPACITY
208/230V** MIN WIRE SIZE (AWG)
208/230V†† MIN GND
WIRE SIZE
208/230V
MAX FUSE/CKT BKR AMPS
208/230V MAX WIRE LENGTH
208/230V (FT)‡‡
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 L1,L2 L3,L4 L5,L6
KFCEH3401F24†24 18.0 1 28.9/32.0 28.9/32.0 28.9/32.0 44.7/48.5 36.2/40.0 36.2/40.0 8/8 8/8 8/8 10/10 45/50 40/40 40/40 59/60 73/73 73/73 KFCEH3501F30†30 22.5 1 36.2/40.0 36.2/40.0 36.2/40.0 53.8/58.5 45.3/50.0 45.3/50.0 6/6 8/8 8/8 10/10 60/60 50/50 50/50 78/80 59/59 59/59
†Field convertible to 1 phase, single or multiple supply circuit. ‡Field convertible to 3 phase. ** Includes blower motor amps of largest fan coil used with heater. †† 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 National Electric Code
(ANSI/NFPA 70).
‡‡ Length shown is as measured 1 way along wire path between unit and service panel for a voltage drop not to exceed 2%. *** Heaters are Intelligent Heat capable when used with the FK4, FV4, and 40FK fan coils and corporate 2-speed programmable thermostat (TSTATXXP2S01-B), or Thermidistat™Control (TSTATXXPRH01-B). NOTES: 1. For fan coil sizes 018-036.
2. For fan coil sizes 042-060 and all FE4, FK4, FV4, 40FK sizes. 3. Single circuit application of F15 and F20 heaters requires single-point wiring kit accessory.
—4—

A. Wire 24-v 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 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 230-v operation. For 208-v applications, disconnect black wire on transformer 230-v terminal and
reconnect it to 208-v terminal. (See Fig. 5.) The secondary circuit of transformer is protected by a 5-amp fuse mounted on PCB.
CAUTION: On FA, FB, FC, FH, FX, or PF1MNB018-070 if W2, W3, and E are individually connected on any 3 stage
heater (18, 20 24, 30 kw), as with outdoor thermostats or any other situation, an emergency heat relay must be used. This
relay is in kit Part No. KHAOT0201SEC and is normally used with kit Part No. KHAOT0301FST for 2 outdoor thermostat
systems.
Fig. 3—Installation of Circuit Breaker Model Heater A90153
SINGLE
CIRCUIT
GROUND
FAN
COIL
BLOWER
SHELF
MOUNTING
BRACKET
COVER
PLATE WIRE ROUTING
LOAD SIDE
LINE SIDE
CONNECTION
DUAL CIRCUIT
GROUND LUG
WIRE TIE
(REMOVE ON
LARGER UNITS)
WIRES TO
HEATER
→Fig. 4—Installation of Window Bezel for Circuit Breaker Model Heater A03069
—5—