IM 778 / Page 3
Unit location
1. Locate the unit in an area that allows for easy removal of
the filter and access panels, and has enough space for
service personnel to perform maintenance or repair.
Provide sufficient room to make water, electrical and
duct connections.
2. The contractor should make sure that access has been
provided including clearance for duct collars and fittings
at water and electrical connections.
3. Allow adequate room around the unit for a condensate
trap.
4. The unit can be installed “free standing” in an equipment
room; however, closet installations are more common for
small vertical type units. Generally, the unit is located in
the corner of a closet with the non-ducted return air fac-
ing 90° to the door and the major access panels facing
the door as in Figure 1. Alternatively, the unit can have a
ducted return air with the opening facing the door and
the major access panels facing 90° to the door as in
Figure 2.
5. It is recommended that the unit be located on top of a
vibration absorbing material such as rubber or carpet to
reduce any vibration. See Figure 8, page 6.
6. If optional field installed controls are required (boilerless
system), space must be provided for the enclosure to
mount around the corner from the electrical entrances.
Do not locate the side of the unit too close to a wall. See
Figures 1 and 2.
Minimum distance requirement from return air duct
collar to wall, for non-ducted units.
Model
Distance
007 – 012
4 inches
019 – 024
5 inches
030 – 036
6 inches
042 – 048
8 inches
Filter access
Each unit is shipped with a filter bracket for side filter
removal.
Heat Pump with
Left-Hand
Return Air
Arrangement
Heat Pump with
Right-Hand
Return Air
Arrangement
Heat Pump with
Left-Hand
Return Air
Arrangement
Heat Pump with
Right-Hand
Return Air
Arrangement
Return
Air
Opt. Controls
Elec. Entrance
Main Access Panel
Return
Air
Opt. Controls
Elec. Entrance
Main Access Panel
Condensate
Water Supply
Water Return
Condensate
Water Supply
Water Return
Return Air Thru
Louvered Door
Risers
Return Air Thru
Louvered Door
Return
Air
Duct &
Grille
Opt. Controls
Elec. Entrance
Main Access Panel
Opt. Controls
Elec. Entrance
Main Access Panel
Condensate
Water Supply
Water Return
Condensate
Water Supply
Water Return
Risers
Return
Air
Duct &
Grille
NOTE:
Minimum distance
requirement for non-ducted
units. (see chart above).
Figure 1. Typical closet installation with louver door return
Figure 2. Typical closet installation with ducted return