– 9 –
P/N SCM2-0111
Model
SCM
Air to Water Heat Pump — Installation, Operation & Maintenance Manual
Section 6: electrical connections
The electrical installation must comply
with the latest edition of: in the U. S. — Na-
tional Electrical Code ANSI/NFPA No. 70;
in Canada — CSA C22.1 Canadian Elec-
trical Code Part 1. Wiring must be N.E.C.
Class 1. Use only copper wire, rated for
120°F and sized for the load listed in this
manual.
Electrical shock hazard
— Disconnect
all electrical power before servicing the
unit. Also, the unit must be grounded in
accordance with the Electrical Code listed
above.
Overcurrent protection & wire
sizing
• Protect each circuit with a breaker or fuse rated for
the load given in Figure 1, page 3.
The electrical loads given in Figure 1,
page 3 allow for a pump load of no more
than 5 amps at 110 VAC (2.5 amps at
230 VAC). If the pump load exceeds this,
provide a separate power source to the
pump. DO NOT feed power to the pump
from the SpacePak air handler panel.
• Optional electric immersion heater — Provide a
separate power source and overcurrent protection
for the optional heater, if used. Refer to the Installa-
tion and Operation Manual supplied with the heater
kit.
Optional low ambient
adjustment
• If cooling is desired in low ambient conditions, fol-
low the instructions supplied by SpacePak Techni-
cal Support.
SpacePak heat pump/chiller
wiring
• Connect
single
air handler to chiller as shown in
Figure 9, page 9.
• Connect
multiple
air handlers to chiller via
SpacePak Chiller Interface Module as shown in
Figure 10, page 10.
• See Figure 11, page 11, for chiller electrical ladder
diagram.
Figure 9
SpacePak Heat Pump/Chiller field wiring — SINGLE air han-
dler (see Figure 11, page 11 for ladder wiring diagram)
