Installation guide

I. OPENING SERVICE VALVES
Outdoor units are shipped with a refrigerant charge
sealed in the unit. Opening the service valves releases
this charge into the system.
NOTE: Open the Suction service valve first. If the Liquid
service valve is opened first, oil from the compressor may
be drawn into the indoor coil TXV, restricting refrigerant
flow and affecting operation of the system.
Remove Suction service valve cap and insert a hex
wrench into the valve stem. Hold the valve body steady
with an end-wrench and back out the stem by turning the
hex wrench counterclockwise. Turn the stem until it just
contacts the rolled lip of the valve body.
After the refrigerant charge has bled into the system,
open the Liquid service valve.
NOTE: These are not back-seating valves, tt is not nec-
essary 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 seal-
ing surface on inside of cap.
Tighten cap finger tight and then tighten additional Y6of 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
ELECTRICAL SHOCK HAZARD
Failure to turn off the main (remote) electrical dis-
connect device could result in personal 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.
Supply voltage must be 208/230 volts (197 volt minimum
to 253 volts maximum) 60 Hz single phase.
Outdoor units are approved for use with copper conduc-
tors 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 cop-
per 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.
Wiring Connections
Make all outdoor electrical supply (Line Voltage) connec-
tions 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 wires to
Contactor and Ground Lug according to Wiring Diagram
on unit. Refer to Figure 11.
Route thermostat wiring through rubber grommet in bot-
tom of Control Box. Low voltage lead wires are provided in
the control box for connection to thermostat wires (use
wire nuts). Refer to Wiring Diagram on unit and Figure 12
for low voltage wiring examples.
NOTE: Use No. 18 AWG (American Wire Gage) color-
coded, insulated (35 °C minimum) wire. If thermostat is
located more than 100 feet (30.5 m) from unit as mea-
sured along the control voltage wires, use No. 16 AWG
color-coded wires to avoid excessive voltage drop.
Electrical Supply (Line Voltage)
Figure 11
Connections
DISCONNECT
PER NEC AND/OR
LOCAL CODES
I
L1
FIELD POWER
WIRING L2
FIELD GROUND
WIRING I
CONTACTOR
3or13
-®
GROUND
LUG
428 01 5100 01 9