CMW
070517
Page 32 | 1-855-235-5271
Model
Line Set Length
<25ft
26-50ft
50-100ft
Vertical Rise
<3ft
3-10ft
>10ft
<3ft
3-10ft
>10ft
<3ft
3-10ft
>10ft
CM2500
Horizontal Tubing
3/8”
Vertical Rise
3/8”
PREPARING THE CONDENSING UNIT (continued)
Installing the Condensing Unit
The condensing unit can be installed inside a well-ventilated area of the home, but it is typically installed outside. Exterior
applications will require the use of a protective housing, and the amount of sun exposure should be considered when selecting
the placement of the condensing unit. The unit requires a dedicated 15-amp circuit, non-GFI. Make sure there is a minimum of
three (3) feet of horizontal clearance in every direction around the unit (five feet is ideal). The unit should be plugged in.
Set the condensing unit level and make sure it has the proper amount of clearance in accordance with the instructions. Verify
that the name plate power is supplied, the unit has the proper electric disconnect, that the fuse protection is connected but not
turned on, and that the unit is ready for piping connections.
Indoor condensing unit installations:
Inside installations require special consideration, as there must be adequate ventilation to remove the heat created
during normal operations. An exhaust port with fan may need to be installed to ensure that heat is effectively removed
from the utility room. A return grille or provision for 500-600 CFM of cool air to enter the room to replace the exhausted
air will accomplish this. Unobstructed airflow to and from the unit is a critical factor in the units overall performance.
Make sure there is a minimum of three (3) feet of horizontal clearance in every direction around the unit (five feet is
ideal). This will ensure that the unit can move the air around the room in an efficient manner.
Outdoor condensing unit installations:
You must utilize the exterior condensing unit housing for outdoor installations. Place the condensing unit on a solid
foundation in a location with adequate ventilation. Make sure there is a minimum of three (3) feet of horizontal
clearance in every direction around the unit (five feet is ideal). The unit should be elevated 18” in order to avoid any
possible flooding or damage by animals and should be clear of leaves, dirt, and other debris.
Fan Cycling Switch:
These switches are used to cycle the condenser fan at low ambient temperatures.
Refrigeration Lines:
A 1/4” OD copper liquid line is required.
The refrigerant drier and the sight glass shall be installed (in that order) in the direction of the refrigerant flow in the liquid
line between the condensing unit and evaporator unit (fan coil unit). Enclose the suction line in cellular insulation with 1/2” wall
thickness, such as Armaflex or a similar brand, in order to reduce heat transfer and prevent the suction line from sweating.
Suction Line Size Chart
