AAON HB-005 - Manual (Page 12)

12
Service & Installation Clearances
Before setting the unit into place, caution must be
taken to provide clearance for unit panels/doors that
must be accessible for periodic service. These areas
contain the controls, safety devices, refrigerant, shut-
off valves and filter access.
HB package units have minimum service and airflow
clearance requirements.
Service Clearance Minimums:
- 36 inches to the front
- 10 inches to the back
- 20 inches to right and left ends
Airflow Clearance Minimums:
- 20 inches around the entire condenser intake
- 24 inches between condenser and obstructions
- 48 inches of clearance over the condenser air
discharge, and from adjacent condenser intakes
48”
Wall or Obstruction
Condenser
Airflow
Minimum 20”
Clearance
RA
SA
Air In Air In
Air In
Air Out
10”
Adjacent
Condenser
20”
Air In
HB Package Unit
Figure 12b, Airflow Clearance Minimums
Service Access Clearance
Air In
Air In
Air Out
36”
RA SA
Air In
20”
20”
10”
Right Left
Front
Back
Figure 12a, Service Clearance Minimums
Airflow to and from the condensing unit must not be
restricted. Obstruction to airflow will result in
decreased performance and efficiency. The
installation position must provide at least 20 inches
of condenser clearance for proper airflow into the
condenser coil. When the unit’s condenser is
positioned adjacent to another condenser, 48
inches of clearance is required between air intakes
for proper airflow and operation.
48”
Air Out
40”
Figure 12c, Other Airflow Clearance Minimums
Required condenser
clearance doubles to 40
inches in recessed areas
.
The HB package unit has a vertical air discharge.
There must be at least 48 inches of clearance
above the vertical air discharge. There must not be
any obstruction above the equipment that may
deflect discharge air back into the unit’s air inlets.
It is advisable to never place the unit directly under
an overhang. Condensing units should not be
installed in an enclosure or pit that is deeper than
the height of the unit. When the unit is installed in
a recessed area the coil side clearance is doubled
to 40 inches for inlet air.