Installation manual

175231-YIM-A-0706
Unitary Products Group 11
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 drain-
age. See Figure 4.
COMPRESSORS
Units are shipped with compressor mountings factory-
adjusted and ready for operation.
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 7.
SERVICE ACCESS
The following removable panels provide access to all
serviceable components:
• Compressor compartment
• Electric Heat compartment
• Gas Heat compartment (Two panels)
• Side Supply & Return Air compartments (Two
panels)
• Blower compartment (Three panels)
• Main control box
• Filter compartment
• Outdoor Air compartment (Two panels)
Refer to Figures 13 and 14 for location of these access
panels.
FIGURE 3 - FIXED OUTDOOR AIR DAMPER
FIGURE 4 - RECOMMENDED DRAIN PIPING
Do not loosen compressor mounting bolts.
Make sure that all screws and panel latches
are replaced and properly positioned on the
unit to maintain an airtight seal.