
Page 13
ELECTRICAL-LINE VOLTAGE
All fi eld installed wiring, including electrical ground,
must comply with the National Electrical Code as well as
all applicable local codes.
Refer to the unit wiring diagrams for fuse sizes and a
schematic of the fi eld connections which must be made by
the installing (or electrical) contractor.
Consult the unit wiring diagram located on the inside of the
compressor access panel to ensure proper electrical hookup.
All fi nal electrical connections must be made with a
length of fl exible conduit to minimize vibration and sound
transmission to the building.
To avoid possible injury or death due to
electrical shock, open the power supply
disconnect switch and secure it in an open
position during installation.
CAUTION: Use only copper conductors for fi eld
installed electrical wiring. Unit terminals are not
designed to accept other types of conductors.
Figure 17. Line Voltage Field Wiring
Table 5. Electrical Data
General Line Voltage Wiring
Be sure the available power is the same voltage and phase
as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or the
National Electric Code, whichever is applicable.
Unit Power Connection
Line voltage connection is made by connecting the
incoming line voltage wires to the “L” side of the
contactor as shown in Figure 16. Consult Table 5 for
correct wire and fuse size.
External Loop Power Connection
If the unit is to be used with an external loop pump, the
pump(s) will be connected to the loop pump terminals in
the unit electrical box as shown in Figure 17. The pumps
will automatically be cycled as required by the unit.
208 Volt Operation
All 208-230 volt units are factory wired for 230 volt.
The transformers may be switched to 208V operation as
illustrated on the wiring diagram.
HWG Pumping Wiring
Install HWG Pump power wires on HWG Pump power
block after insuring water is in HWG circuit.
Fan Fan HWG Loop Total Minimum Max Max Min Maximum
Model Motor Motor Pump Pump FLA Circuit Fuse Fuse Wire Wire
RLA LRA RLA LRA HP FLA Amps Amps Amps Ampacity USA Can AWG Length (ft.)
036 7.1 38 7.1 38 1/2 4.3 0.4 4.0 22.9 24.7 30 30 10 70
042 10.0 42 10.7 47 1/2 4.3 0.4 4.0 29.4 32.1 40 40 8 90
048 10.7 47 11.4 54 1.0 7.0 0.4 4.0 33.5 36.3 45 45 6 120
060 13.6 67 13.6 67 1.0 7.0 0.4 4.0 38.6 42.0 50 50 6 110
072 15.0 73 15.0 73 1.0 7.0 0.4 4.0 41.4 45.2 50 50 6 100
Rev.: 03/30/01B
All units rated Voltage of 208-230/60/1.
All units Min/Max Voltage of 187/253.
HACR breaker in USA only. All fuses Class RK-5.
Wire length based on one way measurement with 2% Voltage drop and wire size based upon 60°C copper conductors.
Compressor
Sys A Sys B
Transformer
Compressor A
Contactor
L1
L2
208-230/60/1
4 Amp Max.
Source Pump
Ground
PR
ICM2
Controller
Pump
Circt Brkr
with ground
(see Elect. Table for wire
and Brkr. size)
Compressor B
Contactor
CXM Control - A
Low Voltage
Connector
CXM Control - B
Low Voltage
Connector
HWG
Install HWG Pump
Power after insuring
water is in HWG circuit
Yellow
Blk
External Loop Pump(s)
WARNING
Commentaires sur ces manuels