Bryant LEGACY 580J*20M Series, Installation Instructions Manual

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Fig. 5 — Service Clearances
NOTE: Unit is not designed to have overhead obstruction.
Contact Application Engineering for guidance on any applica-
tion planning overhead obstruction or for vertical clearances.
INSTALLATION
Job-Site 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 inter-
fere 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, unit performance and service
access below, around and above unit as specified in unit draw-
ings. See Fig. 5.
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.
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto the
unit.
Locate mechanical draft system flue assembly at least 4 ft
(1.2 m) from any opening through which combustion products
could enter the building, and at least 4 ft (1.2 m) from any adja-
cent building (or per local code). Locate the flue assembly at
least 10 ft (3.05 m) from an adjacent unit’s fresh air intake hood
if within 3 ft (0.91 m) of same elevation (or per local code).
When unit is located adjacent to public walkways, flue assembly
must be at least 7 ft (2.1 m) above grade.
Select a unit mounting system that provides adequate height
to allow installation of condensate trap per requirements. Refer
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
LOCATION
DIMENSION
in. (mm)
CONDITION
A 36 (914) Recommended clearance for air flow and service
B 42 (1067) Recommended clearance for air flow and service
C
18 (457)
No convenience outlet
No economizer
No field-installed disconnect on the economizer hood side (factory-installed disconnect installed)
36 (914)
Convenience outlet installed
Vertical surface behind servicer is electrically non-conductive (e.g. wood, fiberglass).
42 (1067)
Convenience outlet installed
Vertical surface behind servicer is electrically conductive (e.g. metal, masonry)
96 (2438)
Economizer and/or power exhaust installed
Check for sources of flue products with 10 feet (3 meters) of economizer fresh air intake
D 42 (1067) Recommended clearance for service
C
B
D
A