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KFFEH: Installation Instructions
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.
Fig. 13 – 24 and 30 kW Heaters (3-Phase Wiring Factory Supplied)
Fig. 14 – 24 and 30 kW Heaters
(Single Phase, Single Supply Circuit-Field Modified)
Fig. 15 – 24 and 30 kW Heaters
(Single Phase, Multiple Supply Circuits-Field Modified)
Ground Connections
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.)
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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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
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. 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
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
A00082
motor speed tap desired. Save the insulating cap and place it on the
motor lead that was removed from the relay
Table 4
for further clarification of speed tap selections.
A00083
Fig. 16 – PSC Motor Speed Tap and Fan Relay
Table 4 – Color Code for Motor Lead Wires FJ4 and PF4MNX
MOTOR SPEED TAP
Common
A00084
High
Medium
Low
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
7
(Fig. 1
3).
WIRE COLOR
Yellow
Black
Blue (Factory selected)
Red (Blue on 2-speed models)
or
Fig.
2).
(Fig.
1).
(Fig.
16). Refer to
A94068
(Fig.
17).
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