7
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. No
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. Remove service connection
if provided with unit.
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
asshowninFig.8.
A07354
Fig. 8 --- Tighten Flare Nut
INSTALL ALL POWER AND INTERCONNECTING
WIRING TO OUTDOOR UNIT
Strong
wind
A07350
Fig. 9 --- High Wind Installation
Outdoor Unit Wiring
Connections
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 loosening screws.
4. Remove caps on conduit p anel.
5. Connect conduit to conduit panel. (See Fig. 10)
6. Properly connect both power supply and control lines to ter-
minal block per the connection diagram.
7. Ground unit in accordance with NEC and local electrical
codes.
8. Use lock nuts to secure conduit.
9. Reinstall field wiring cover.
CAUTION
!
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
from indoor unit to outdoor unit.
S Every wire must be connected firmly . Loose wiring may
cause terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, be sure all wiring
is tightly connected.
S No wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.
S Disconnecting means must be provided and shall be
located within sight and readily accessible from the air
conditioner.
S Connecting cable with conduit shall be routed through
hole in the conduit panel.
Terminal Block
Conduit panel
Conduit
Outdoor unit
CONNECTING CABLE
Main Power
Supply
115-1-60
L
NL
N
GND
S
115-1-60
Power to
Indoor
Unit
Ground Control
9 &12K Outdoor Unit
9 &12K Indoor Unit
LN
GND
S
Power to
Indoor
Unit
115-1-60
Ground Control
Use a four (4) Wire Cable
(Do Not use thermostat wire)
Note: For 208/230 units
L & N will be labeled L1 & L2
A08292
Fig. 10 --- Field Wiring
38/40GXQ
(14 pagine)
(12 pagine)
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