Page 3
HSXA16 SERIES
Setting the Unit
Refer to unit dimensions for sizing mounting slab, plat-
forms or supports. See figure 1 for installation clearances.
30"
(762 mm)
AS NOTED
Installation Clearances
Figure 1
NOTE − A service access
clearance of 30" (762 mm)
must be maintained in front
of the service access panel.
Clearance to one side must
be 36" (914 mm). Clearance
to one of the remaining two
sides may be 12" (304 mm)
and the final side may be 6"
(152 mm).
NOTE − A clearance of 24"
(610 mm) must be main-
tained between two units.
NOTE − 48" (1219 mm)
clearance required on top
of unit. Maximum soffit
overhang is 36" (914 mm).
AS
NOTED
AS
NOTED
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
Slab Mounting
When installing a unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground would not collect around the unit. See figure
2. Slab may be level or have a slope tolerance away from
the building of not more than 2 degrees or 2 inches per 5
feet (51 mm per 1524 mm).
Slab Mounting
Figure 2
INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE
TOLERANCE OF 2 DEGREES (OR 2 INCHES PER 5 FEET [51 MM
PER 1.5 M]) AWAY FROM BUILDING STRUCTURE.
MOUNTING
SLAB
BUILDING
STRUCTURE
GROUND LEVEL
Roof Mounting
Install the unit a minimum of 6 inches (152 mm) above the
roof surface to avoid ice build−up around the unit. Locate
the unit above a load bearing wall or area of the roof that
can adequately support the unit. Consult local codes for
rooftop applications.
Electrical
WARNING
Electric Shock Hazard.
Can cause injury or death.
Unit must be grounded in accordance
with national and local codes.
Line voltage is present at all compo-
nents when unit is not in operation on
units with single-pole contactors. Dis-
connect all remote electric power sup-
plies before opening access panel.
Unit may have multiple power sup-
plies.
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch.
2. Ground unit at unit disconnect switch or to an earth
ground.
NOTE − Connect conduit to the unit using a proper
conduit fitting.
NOTE − Units are approved for use only with copper
conductors. 24V, Class II circuit connections are
made in the low voltage junction box. Refer to ap-
propriate figure for field wiring. See figure 3 for field
wiring. See figures 4 and 3 for typical wiring.
Outdoor Unit Field Wiring Diagram
Figure 3
208/230/60/1
L2
L1
WARNING! − ELECTRIC SHOCK HAZARD. CAN CAUSE INJURY OR DEATH.
UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL
CODES.
NOTE − FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT
RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM
OVER-CURRENT PROTECTION SIZE.
NOTE − HARD START KIT IS REQUIRED ON −024 MODEL; OPTIONAL FOR
OTHER APPLICATIONS.
NOTE − A complete unit wiring diagram is located
inside the unit control box cover.
