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035-13606-003 Rev. A (202)
Unitary Products Group 3
A minimum clearance of 18 inches is required for service at
the control panel and compressor compartments access. A
10 inch clearance is required for the air inlet to the outdoor
coil around the perimeter of the unit. The air discharge of the
unit requires a 60 inch clearance between the top of the unit
and any obstruction. See Figure 1.
The length of the refrigerant tubing, between the outdoor unit
and indoor coil, should be as short as possible to avoid
capacity and efficiency loss. Excessive spacing of the out-
door unit from the home can lead to the refrigerant lines
being restricted by trampling or by being punctured by lawn
mowers. Locate the outdoor unit away from bedroom win-
dows or other rooms where sound might be objectionable.
Adverse effects of prevailing winds, blowing snow or sleet
onto the outdoor coil can be eliminated by placing the outdoor
unit where the wind does not blow across the unit. Trees,
shrubs, corners of buildings and fences standing off from the
coil can reduce capacity loss due to wind chill effect.
Provide ample clearance from shrubs to allow adequate air to
pass across the outdoor coil without leaves or branches
being pulled into the coil.
Consideration should be given to the distance and routing of
electrical service that would have to be run to connect the
outdoor unit.
The unit must be located outdoors and must not be con-
nected to duct work. It is recommended the outdoor unit be
mounted upon a solid base that will not shift or settle. Top of
base should be two inches above grade. Thought should be
given to water drainage away from the outdoor unit. Drain
holes in the base pan must be kept clear.
FIGURE 1 : TYPICAL RESIDENTIAL OUTDOOR UNIT LOCATION
MINIMUM 24” SERVICE ACCESS
CLEARANCE ON ONE SIDE
60” OVERHEAD
CLEARANCE
10” CLEARANCE
COIL AREA
WEATHERPROOF
DISCONNECT
SWITCH
THERMOSTAT
TO FURNACE OR
AIR HANDLER
TERMINAL BLOCK
NEC CLASS 1 WIRING
NEC CLASS 2 WIRING
TO INDOOR COIL
SEAL OPENING(S) WITH
PERMAGUM OR EQUIVALENT
CONTROL ACCESS PANEL
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF.