Outdoor Unit Installation - COMFORT-AIRE CMA18SB-1 Installation, Operation & Maintenance Manual

Horizontal/Side Discharge Condensing Units
UNIT LOCATION AND MOUNTING:
Choose a location that places the condensing
unit as close to the indoor unit as possible. The
maximum unit separation and vertical lift (compressor
above evaporator) must be taken into account [See
Fig 1]. Do not exceed allowable pipe lengths.
Fig. 1
Refrigerant Piping
Liquid-Gas In.
Max. Refrigerant
Ft.
Line Length*
Max. Elevation
Ft.
Vertical Lift**
*Minimum pipe length must not be less that 15 feet.
** "P" trap risers every 10 ft. when outdoor unit is installed
above indoor unit.
NOTE: Oil traps must be installed every 10ft. when
the outdoor unit is installed above the indoor unit.
Install the outdoor unit on a rigid surface, able to
withstand the unit's weight, such as a concrete slab.
If the installation location allows the unit to be
exposed to strong winds (such as sea side
applications), ensure that the unit has a barrier from
the wind [See Fig. 2]. This will assist with the proper
operation of the fan by obstructing strong gusts of
wind from entering the unit's cabinet.
Avoid areas where water, snow, or ice may fall
from a roof onto the unit. In climates where snow
is a consideration, locate the unit away from areas
prone to drifting. Ensure the location of the unit will
not be subject to snow drifts, heavy accumulation
of snow or leaves or other seasonal debris. If
unavoidable, provide the awning for the unit.

OUTDOOR UNIT INSTALLATION

Model No.
CMA 18 CMA 24 CMA 30 CMA 36
1/4 - 1/2 3/8 - 3/4
82
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An awning can be built over the outdoor unit to
prevent direct sunlight or rain exposure or snowfall.
Ensure that the awning is at least 2 ft. above the
top of the unit's housing.
During heating and defrost modes, the condensate
should be properly drained away from the unit.
Inlets/outlets should stay clear of obstructions such
as walls and shrubs. Minimum clearances must be
adhered to [See Fig. 4 & 5 on page 7].
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Do not locate two or more units in a way that will
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will blow into a nearby unit [See Fig. 3].
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AITONS EQUIPMENT