INSTALLATION INSTRUCTIONS
3-phase R-22 Split System Heat Pump
506 01 5001 00
9
NOTE:
These are not back-seating valves. It is not
necessary to force the stem tightly against the rolled lip.
The service valve cap is a primary seal for the valve and
must be properly tightened to prevent leaks. Make sure
cap is clean and apply refrigerant oil to threads and
sealing surface on inside of cap.
Tighten cap finger tight and then tighten additional
6
of a
turn (1 wrench flat) to properly seat the sealing surfaces.
J. GAUGE PORTS
Check for leaks at the schrader ports and tighten valve
cores if necessary. Install plastic caps finger tight.
ELECTRICAL WIRING
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in per‐
sonal injury or death.
Before installing, modifying or servicing system,
turn OFF the main (remote) electrical disconnect
device. There may be more than one disconnect
device.
Refer to unit rating plate for the required supply voltage.
Depending on the model, required supply voltage will be:
208/230 V, 3-phase, 60 Hz.
or
460 V, 3-phase, 60 Hz.
Outdoor units are approved for use with copper
conductors only. Do not use aluminum wire.
Refer to unit rating plate for minimum circuit ampacity and
circuit protection requirements.
Grounding
Permanently ground unit in accordance with the National
Electrical Code and local codes or ordinances. Use a
copper conductor of the correct size from the grounding
lug in control box to a grounded connection in the service
panel or a properly driven and electrically grounded
ground rod.
Supply Voltage Wiring Connections
Make all outdoor electrical supply (Line Voltage)
connections with raintight conduit and fittings. Most
codes require a disconnect switch outdoors within sight of
the unit. Consult local codes for special requirements.
Route electrical supply (Line Voltage) wiring through
knockout hole in bottom of Control Box.
Connect two power wires to Contactor and one power
wire to Blue lead wire (use wire nut). Connect ground wire
to Ground Lug. Refer to Wiring Diagram on unit and
Figure 11.
Figure 11
208/230 V and 460 V
Electrical Supply
(Line Voltage) Connections
DISCONNECT
PER NEC AND/OR
LOCAL CODES
CONTACTOR
GROUND
LUG
FIELD GROUND
WIRING
FIELD POWER
WIRING
11
13
L1
L3
L2
BLUE LEAD WIRE
Phase Monitor Relay Board
The Phase Monitor Board detects the sequence of the
three phase electrical system, and a relay breaks the Y
(call for cooling) control signal if the phasing is incorrect.
Additionally, the board will detect the loss of voltage on
any of the three phase inputs and break the Y signal in the
same way.
An LED on the board displays the following status:
Red LED ON -
Normal function, relay contact
closed.
Red LED Blinking - Abnormal function, relay contact
open.
Red LED OFF -
No 24 VAC control power present at
board.
NOTE:
Units with Comfort Alert
t
Diagnostics device
have phase monitor feature built in.
Figure 12
Phase Monitor Relay Board
