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Wiring
PC-Series Power Supply Connections
The unit has a concentric 1.093" / 0.875" knockout for pow-
er supply connection to the electrical box. There are also two
7/8" knockouts and a 1/2" opening with plastic grommet
(grommet hole is 3/8") for connections to the supplied air ther-
mostat, optional external pool water aquastat, and power and
signal connections to optional outdoor condensing unit.
A schematic diagram (SCH) and electrical box layout
diagram (ELB) can be found on the electrical box cover of the
unit as well as in the
Model Specific Information
manual.
The Electrical Tables in the
section contain information about the size of wire for the con-
nections, as well as the recommended breaker size.
NOTE: A properly qualified electrician
should be retained for all connections to the
heat pump and associated controls.
IMPORTANT NOTE FOR 3-PHASE UNITS: If
on startup compressor is noisy and not
pumping, reverse L1 and L2 supply wires.
TABLE 10 - PC-Series Power Supply Connections
Line
Description
L1
Line 1
All
L2
Line 2
All
L3
Line 3
3-phase only
N
Neutral
GND
Ground
Optional AC2-Series Outdoor Unit:
Power Supply Connections
The AC2 outdoor unit is powered from the PC unit. The
power supply for the AC2 unit is 208 to 277VAC, 50/60Hz. The
PC and AC2 units have matching terminal strips for these con-
nections. Use a two conductor, minimum 14ga outdoor rated
cable for this connection. Refer to diagram
TABLE 11 - AC2-Series Power Supply Connections
Line
L1
Supply line
L2
Supply line
GND
Ground
Use a two conductor outdoor rated 14ga minimum cable.
IMPORTANT NOTE: Most codes require a
disconnect switch visible and/or reachable
from the outdoor unit to be installed in the
power supply cable. If the switch has fuses
or breakers they must be no more than 10A.
OUTDOOR DISCONNECT SWITCH IS A
SAFETY DEVICE ONLY. Turn off breaker to
indoor unit before servicing to avoid costly
damage to electronic control board.
ISSUE 03: 1-Oct-2021
section of this
Model Specific Information
Voltages
460-3-60, 380-3-50 only
All (connect to ground lug)
002298CDG.
Description
Auxiliary Plenum Heater:
Power Supply Connections
Auxiliary heat for the pool room air will usually be provided
by an electric duct heater (plenum heater). These are available
as accessories in 5, 7, 10, 15, and 20 kW sizes, and are in-
stalled in the air discharge ductwork outside the PC unit. The
plenum heater will have its own breaker and power supply wire.
The Electrical Tables in the
contain information about the size of wire for the connections, as
well as the recommended breaker size.
Auxiliary Plenum Heater:
Signal Connections
The PC unit has two dry contacts to control the 2 stages of
the plenum heater. These dry contacts can also be used to
control other types of auxiliary air heat. Note that dry contacts
are intended to activate equipment that has its own 24VAC
transformer; if equipment does not have its own transformer,
one will need to be installed in an external electrical box.
Connect the terminals on the PC's terminal strip to the
matching terminals on the plenum heater's control board using
an 18-3 cable.
TABLE 12 - Plenum Heater Signal Connections
Signal
C
Common
P
1
Dry contact for auxiliary heat stage 1
2
Dry contact for auxiliary heat stage 2
Use a 3-conductor 18ga cable.
Pool Pump Signal Connections
In most installations, the pool pump will be always on, to
constantly circulate pool water through the filter. So there will
always be pool water circulation through the PC unit, with no
controls required.
However, the PC unit does have a dry contact to relay an
external 24VAC signal to activate the pool pump contactor when
the PC requires pool water flow; that is, in pool water heating
mode. The 24VAC transformer and contactor will be contained
in an external electrical box. See the following wiring connec-
tion diagram 002298CDG.
Connect the 24VAC signal to be relayed to terminals CP1
and CP2 on the PC unit's terminal strip with an 18-2 cable.
TABLE 13 - Pool Pump Signal Connections
Signal
CP1
Dry contacts for pool pump contactor
CP2
Use a 2-conductor 18ga cable.
Page 12
Model Specific Information
section
Description
Description
002291MAN-03
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