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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 accumula-
tion 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.
2.5 Coastal Considerations
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup-
plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.
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.
STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool.
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.
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Alternate Line Sizes
4
Line Sizes
Vapor
Model
Line
4TWR6024N
5/8
4TWR6036N
3/4
4TWR6048N
7/8
4TWR6060N
1-1/8
Line Sizes
Vapor
Model
Line
4TWR6024N
3/4
5/8
4TWR6036N
7/8
4TWR6048N
3/4
3/4
4TWR6060N
7/8
Table 5.1
Service Valve Connection Sizes
Liquid
Vapor Line
Line
Connection
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
Service Valve Connection Sizes
Liquid
Vapor Line
Line
Connection
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
3/8
7/8
Liquid Line
Connection
3/8
3/8
3/8
3/8
Liquid Line
Connection
3/8
3/8
3/8
3/8
3/8
3/8
18-AC104D1-1G-EN
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