Outdoor Unit Installation - Gree GWH18AC-D3DNA1B Service Manual

If piping is going through the right or left side:
1. Use a small saw blade to carefully remove the correspond-
ing plastic covering on side panel and drill the appropriate
size hole where the pipe is going through the wall. See Fig.
8(c).
2. Remove knockout 1 if you are running only the wiring.
Remove knockout 1 and 2 or knockout 1, 2 and 3 if you are
running both piping and wiring through the side of the unit.

7.4 OUTDOOR UNIT INSTALLATION

1. Use a rigid base to support unit in a level position.
2. Locate outdoor unit and connect piping and wiring.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Excessive torque can break flare nut depending on
installation conditions.
Piping Connections to Outdoor Unit
IMPORTANT: Use refrigeration grade tubing ONLY.
other type of tubing may be used. Use of other types of tubing
will void manufacturer's warranty.
Make sure there is enough piping to cover the required length
between the outdoor and indoor unit.
Piping Guide:
S Do not open service valves or remove protective caps from
tubing ends until all the connections are made.
S Bend tubing with bending tools to avoid kinks and flat spots.
S Keep the tubing free of dirt, sand, moisture, and other
contaminants to avoid damaging the refrigerant system.
S Avoid sags in the suction line to prevent the formation of oil
traps. Insulate each tube with minimum 3/8- -in. (10 mm) wall
thermal pipe insulation. Inserting the tubing into the insulation
before making the connections will save time and improve
installation quality.
1. Remove service valve cover if provided with unit.
2. Cut tubing with tubing cutter.
3. Install correct size flare nut onto tubing and make flare con-
nection.
4. Apply a small amount of refrigerant oil to the flare connec-
tion on the tubing.
5. Properly align tubing in with service valve.
6. Tighten flare nut and finish installation using two wrenches
as shown in Fig. 10.
Fig. 10 --- Tighten Flare Nut
INSTALL ALL POWER AND INTERCONNECTING
WIRING TO OUTDOOR UNIT
Outdoor Unit Wiring Connections
No
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
S Be sure to comply with local codes while running wire
S Every wire must be connected firmly. Loose wiring may
S No wire should be allowed to touch refrigerant tubing,
S Disconnecting means must be provided and shall be
S Connecting cable with conduit shall be routed through
A07354
25
Strong
wind
Fig. 11 --- High Wind Installation
1. Mount outdoor power disconnect.
2. Run power wiring from main box to disconnect per NEC
and local codes. Set outdoor unit in place.
3. Remove field wiring cover from unit by removing screws.
4. Connect conduit to the conduit panel.
(See Fig. 12)
5. Properly connect both power supply and control lines to ter-
minal block per the connection diagram.
6. Ground unit in accordance with NEC and local electrical
codes.
7. Use lock nuts to secure conduit.
8. Reinstall field wiring cover.
CAUTION
!
from indoor unit to outdoor unit.
cause terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, be sure all wiring
is tightly connected.
compressor or any moving parts.
located within sight and readily accessible from the air
conditioner.
hole in the conduit panel.
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