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C
LOCATION
DIMENSION
48--- in (1219 mm)
18--- in (457 mm)
A
18--- in (457) mm
12--- in (305 mm)
42--- in (1067 mm)
B
36--- in (914 mm)
Special
36--- in (914 mm)
C
18--- in (457 mm)
48--- in (1219 mm)
42--- in (1067 mm)
D
36--- in (914 mm)
Special
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application
planning overhead obstruction or for vertical clearances.
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical 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.
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. This includes the clearance to combustible surfaces,
B
CONDITION
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 of unit fresh air intake hood
Side condensate drain is used
Minimum clearance
No flue discharge accessory installed, surface is combustible material
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. 3 - - Service Clearance Dimensional Drawing
A
unit performance and service access below and around unit
as specified in Fig. 3.
NOTE: Consider also the effect of adjacent units.
Be sure that unit is installed such that snow will not block
the combustion intake or flue outlet.
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. For proper unit operation, adequate combustion and
ventilation air must be provided in accordance with
Section 5.3 (Air for Combustion and Ventilation) of the
National Fuel Gas Code, ANSI Z223.1 (American
National Standards Institute) and NFPA (National Fire
Protection Association) 54 TIA- - - - 54- - - - 84- - - - 1. In Canada,
installation must be in accordance with the CAN1- - - - B149
installation codes for gas burning appliances.
7
D
C13093
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