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2.4 Cold Climate Considerations
NOTE: It is recommended that these precautions be taken for units being installed in areas where snow accumu-
lation and prolonged below freezing temperatures occur.
•
Units should be elevated 3-12 inches above the pad or roof top, depending on local weather. This additional
height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain
holes in unit base pan are not obstructed preventing draining of defrost water.
•
If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should
be installed around the unit to prevent a build-up of snow on the sides of the unit.
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report promptly to the carrier any damage found to the unit.
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such as a concrete slab, consider the following:
• The pad should be at least 1" larger than the unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade to allow for drainage.
• The pad location must comply with National, State, and Local codes.
For other applications refer to application guide.
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
RATED
LINE SIZES
A5AC4018A
A5AC4024A
A5AC4030A
A5AC4036A
A5AC4042A
A5AC4048A
A5AC4060A
Note: For other line lengths, Refer to Refrigerant Piping Application Guide, SS-APG006F-EN, or Refrigerant
Piping Software Program.
5.2 Factory Charge
The outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify
proper system charge via subcooling (TXV/EEV) or superheat (fixed orifice) per the unit nameplate.
88-A5AC4001-1A-EN
Line Sizes
Service Valve Connection Sizes
Vapor
Liquid
Vapor Line
Line
Line
Connection
5/16
3/4
3/4
5/16
3/4
3/4
5/16
3/4
3/4
5/16
3/4
3/4
5/16
7/8
7/8
5/16
7/8
7/8
7/8
5/16
7/8
Table 5.1
Liquid Line
Connection
5/16
5/16
5/16
5/16
5/16
5/16
5/16
Max Line & Lift Lengths
TOTAL Max
Max Lift (ft.)
Line Length (ft.)
150
50
150
50
150
50
150
50
150
50
150
50
150
50
5
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