482 01 2231 02
4
Specifications are subject to change without notice
and 30kW heaters, the third stage relay board jumper is cut at
factory. This provides an eight (8) second delay after first stage
relay closes.
Figure 4
Bezel Installation
A03069
Installation of Window Bezel for Circuit Breaker Model Heater
B. Power Connections
NOTE:
Heater supply circuit wire size and overcurrent protection
must comply with National Electrical Code (NEC) and UL branch
circuit requirements. (See Table 3) Wires and overcurrent
protection, integral to the heater, are not required to meet branch
circuit requirements. Internal circuit protection of 60 amps
(maximum) is acceptable.
1. Unprotected heaters: (See Figures 6, 10, and 11)
a. The 9kW single phase and 15kW three phase heaters can be
wired for single supply circuit only. Supply circuit connects to
heater pigtail leads.
b. The 9kW single phase heaters can use a separate field
−
installed, factory
−
authorized disconnect kit which installs in fan
coil.
NOTE:
Refer to wiring label for component locations.
c. The 9kW heater is factory wired for single supply circuit, single
phase. To convert heater to single supply circuit, three phase:
(1.) Disconnect blue wire from relay 1 terminal 6. Cut, strip, and
connect to field wire L3.
(2.) Disconnect yellow wire from relay 3 terminal 6 and connect
to relay 1 terminal 6.
(3.) Disconnect blue wire from relay 3, terminal 2, and connect
to relay 3 terminal 6.
2. Circuit breaker heaters: (See Figures 7 and 9)
The 15kW and 20kW heaters can be wired for dual
−
supply circuits
only.
3. Fused heaters: (See Figures 8, 12, 13, and 14)
a. The 15kW and 20kW heaters can be wired for single or dual
supply circuits. Single supply circuit wiring requires a factory
authorized, single
−
point adapter kit.
b. The 24kW and 30kW heaters can be wired for single or multiple
supply circuits. Heaters are factory wired for single circuit three
phase. To convert heaters to single circuit single phase, discon-
nect yellow lead from L3 and connect to L1. Disconnect black
lead from L3 and connect to L2. To convert heaters to multiple
supply circuit single phase, remove and discard leads between
single circuit terminal block and fuse block. Remove and discard
single circuit terminal block. Attach L1 through L6 power leads
as indicated on label next to fuse block.
C. Ground Connections
ELECTRICAL SHOCK.
Failure to follow this warning could result in property
damage and/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 Ground/Conduit Note below.)
!
WARNING
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 Figure 1 or 2)
2. For 15kW and 20kW circuit breaker heaters, an additional
ground lug is provided on circuit breaker mounting bracket for dual
circuit grounding. (See Figure 3)
3. For 15kW and 20kW fused heaters, an additional ground lug is
provided on fuse mounting bracket for dual circuit grounding. (See
Figure 2)
4. For 24kW and 30kW fused heaters, two (2) additional ground
lugs are provided for single phase, multi circuit wiring. (See Figure
1)
D. FAN SPEED SELECTION
FCM
The FCM fan coil with the Observer Wall Control will automatically
select the appropriate airflow for the selected heater size. Refer to
airflow/CFM tables for airflow delivery.
CONVERSION OF CIRCUIT BREAKER FOR DOWNFLOW
APPLICATIONS
1. Tag and disconnect factory wiring from terminals on circuit
breaker(s).
2. Pull white plastic release tab on the bottom of circuit breaker
straight out to release circuit breaker from bracket. (See Figure 16)
3. Remove quick connect adapters from factory side of breaker(s).
Reinstall adapters on other end of breakers(s). Be sure adapter is
located between lug screw and plate. Torque lug screw to 30
−
in
−
.lb.
4. Rotate breaker 180 degrees from its original position and reinstall
in bracket. Slide breaker slot into sheet metal tab and snap breaker
into place. Make sure both tabs engage breaker. Reconnect wiring
on opposite end. Make sure wires are positioned as before.
5. Remount circuit breaker bracket into unit so that the switch will be
in UP position when ON.
ATTACH WIRING DIAGRAM AND RATING LABEL
Attach heater rating label included with kit over existing electrical
information label located on front access panel of fan coil. (See
Figure 17) If kit contains multiple rating labels, ensure correct label
is applied (check phase and supply circuits).
VERIFY INSTALLATION
After completion of heater installation, check wiring to ensure
tightness and that proper connections and routings have been
made. Ensure all electrical covers are in place and proper labels
have been applied. Reinstall blower access panel before turning
unit power on.
