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178113-BIM-D-0906
Side Supply
Air Access
Panel
*
Damper
Baffle
Hood
Side Return Air
Screen
Access Panel
1
2
* Gasketed
Rear View
Flange
Figure 9: Fixed Outdoor Air Damper
Condensate Drain
Plumbing must conform to local codes. Use a sealing compound
on male pipe threads. Install a condensate drain line from the
one-inch NPT female connection on the unit to an open drain.
NOTE: The condensate drain operates in a negative pressure
in the cabinet. The condensate drain line MUST be
trapped to provide proper drainage. See Figure 10.
Unit Condensate
Connection
3" Min.
2"
Drain
Plug
Figure 10: Condensate Drain
Compressors
The scroll compressor used in this product is specifically
designed to operate with R-410A Refrigerant and cannot be
interchanged.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
Unitary Products Group
Outdoor Air
Opening Cover
Base
Pan
Base
Rails
The compressor also uses a polyolester (POE oil), Mobil 3MA
POE. This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oil can absorb 15 times as much water as other oils
designed for HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.
Do not leave the system open to the atmosphere. Unit
damage could occur due to moisture being absorbed by
the POE oil in the system. This type of oil is highly
susceptible to moisture absorption
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year
or more. When performing any service that may risk
exposure of compressor oil to the roof, take precautions
to protect roofing.
Procedures which risk oil leakage include, but are not limited to,
compressor replacement, repairing refrigerant leaks, replacing
refrigerant components such as filter drier, pressure switch,
metering device or coil.
Units are shipped with compressor mountings which are
factory-adjusted and ready for operation.
Do not loosen compressor mounting bolts.
Filters
Two-inch filters are supplied with each unit, but units can be
converted easily to four-inch filters. Filters must always be
installed ahead of the evaporator coil and must be kept clean or
replaced with same size and type. Dirty filters will reduce the
capacity of the unit and will result in frosted coils or safety
shutdown. Minimum filter area and required sizes are shown in
Physical Data Table 8.
Make sure that panel latches are properly positioned on
the unit to maintain an airtight seal.
13
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