Carrier WeatherMaster 48HC07 Series - Installation; Jobsite Survey; Step 1 - Plan for Unit Location

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Fig. 4 — Service Clearance Dimensional Drawing — Sizes 07-12
INSTALLATION
Installation of this furnace at altitudes above 2000 ft (610 m)
shall be made in accordance with the Listed High Altitude
Conversion Kit available with this furnace.
L'installation de ce générateur de chaleur à des altitudes
supérieures à 2000 pi (610 m) doit être effectuée conformé-
ment aux instructions accompagnant la trousse de conversion
pour haute altitude fournie avec cet appareil.
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.
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 drawings. See Fig. 4.
NOTE: Consider also the effect of adjacent units.
Be sure that the unit is installed such that snow will not block
the combustion intake or flute 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 Com-
bustion 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.
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 CONDITION
A
48-in. (1219 mm)
18-in. (457 mm)
18-in. (457) mm
12-in. (305 mm)
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
B
42-in. (1067 mm)
36-in. (914 mm)
Special
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
C
36-in. (914 mm)
18-in. (457 mm)
Side condensate drain is used
Minimum clearance
D
48-in. (1219 mm)
42-in. (1067 mm)
36-in. (914 mm)
Special
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
C
B
A
D