C.
Ground Connections
WARNING: 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 Ground/Conduit Note below.) Failure to follow this
warning could result in an electric shock, fire, or death.
NOTE:
Use UL-listed conduit and conduit connector for connecting supply wire(s) to unit to obtain proper grounding. If conduit connection uses
reducing washers, a separate ground wire must be used. Grounding may also be accomplished by using grounding lugs provided in control box.
1. For unprotected or single-circuit heaters, 1 equipment ground connection is provided on fan coil unit. (See Fig. 1 or 2.)
2. For 15- and 20-kw circuit breaker heaters, an additional ground lug is provided on circuit breaker mounting bracket for dual-circuit
grounding. (See Fig. 3.)
3. For 15- and 20-kw fused heaters, an additional ground lug is provided on fuse mounting bracket for dual-circuit grounding. (See Fig. 2.)
4. For 24- and 30-kw fused heaters, 2 additional ground lugs are provided for single-phase, multicircuit wiring. (See Fig. 1.)
D.
Fan Speeds for FA, FB, FC, FH, FX, PF1MNB018—070 Fan Coils
1. Speed tap selection is done at fan relay. To change motor speeds, disconnect fan lead on relay and replace with motor speed tap desired.
Save insulating cap and place on motor lead that was removed from relay. (See Fig. 15.) Refer to Table 6 for further clarification of speed
tap selections.
E.
FK4, FE4, FV4, 40FK, PF1MNB071
1. Refer to Table 7 and 8 for minimum CFM and airflow delivery.
Fig. 15—Motor Speed Tap and Fan Relay
A94068
INSULATING CAP (2)
MOTOR SPEED
TAP LEADS
2 OR 3
COMMON YELLOW
FAN DECK
WRAPPER
SPEED TAP
TERMINAL
PCB
FAN RELAY
SINGLE SPADE
Table 6—Color Code for Motor Lead Wires FA, FB, FC, FH, FX, PF1MNB018—070 Units
MOTOR SPEED TAP
WIRE COLOR
Common
Yellow
High
Black
Medium
Blue (Factory selected)
Low
Red (Blue on 2-speed models)
—9—
