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INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.
Consult local building codes and the NEC (National Elec-
trical Code) ANSI/NFPA 70 for special installation
requirements.
2.
Determine unit location (from project plans) or select unit
location.
3.
Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
LOCATION
DIMENSION
48-in. (1219 mm)
18-in. (457 mm)
A
18-in. (457) mm
12-in. (305 mm)
42-in. (1067 mm)
36-in. (914 mm)
B
Special
36-in. (914 mm)
C
18-in. (457 mm)
42-in. (1067 mm)
36-in. (914 mm)
D
Special
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
C
B
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Check sources of flue products within 10-ft (3 m) of unit fresh air intake hood
Side condensate drain is used
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Check for adjacent units or building fresh air intakes within 10-ft (3 m) of this unit's flue outlet
Fig. 4 — Service Clearance Dimensional Drawing
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or other)
that provides for the minimum clearances required for safety (in-
cluding clearance to combustible surfaces), unit performance and
service access below, around and above unit as specified in unit
drawings. See Fig. 4.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class A, B,
or C roof-covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air inlets
near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, avoid locations that permit water
from higher level runoff and overhangs to fall onto unit.
Select a unit mounting system that provides adequate height to al-
low installation of condensate trap per requirements. Refer to Step
10 — Install External Condensate Trap and Line on page 14 for
required trap dimensions.
A
CONDITION
8
D
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