Reznor SCE Unit Installation Manual - Manual (Page 12)

Form RZ-NA I-SCE, Page 12
HORIZONTAL VENT
INSTRUCTIONS
Components Required -
Factory and Field
Parts in the Horizontal Vent
Terminal/Combustion Air
Package (Option CC6)
Field-supplied installation
requirements:
• Vent pipes - see requirements, page 8.
• Combustion air pipes - see requirements, page 8.
• Taper-type vent pipe diameter reducers and/or increasers as required.
• Thimble (a thimble is not required if wall is of non-combustible construction).
• Flashing.
• Sheetmetal screws, tape, and sealant as required.
Installation Instructions
for Horizontal Vent Kit
Option CC6
1. Determine the location on the outside wall for the vent terminal. Location must comply
with vent length requirements, Requirement No. 3 on page 8. In most applications, the
terminal would be on a level with the heater mounting height. Allow 1/4" per foot (6mm per
305mm) downward pitch for condensate drain.
The distance of the termination of the horizontal vent from adjacent public walkways, adja-
cent buildings, openable windows, and building openings must be in accordance with local
codes or, in the absence of local codes, must conform with National Fuel Gas Code Z223.2.
Local codes supersede all provisions in these instructions and in the National Fuel Gas
Code. Minimum clearances for the horizontal vent terminal are shown below. Also, select a
location that complies with adjoining building clearances as shown in FIGURE 13, page 14.
Products of combustion can cause discoloring of some building finishes and deterioration of
masonry materials. Applying a clear silicone sealant that is normally used to protect concrete
driveways can protect masonry materials. If discoloration is an esthetic problem re-locate the
vent or install a vertical vent.
2. Install the Vent Pipe and Combustion Air Pipe Runs - Use the type of pipe specified in
Requirement No. 1, page 8. Comply with requirements in Requirement No. 2 and No. 4, page
8, when attaching pipes to the heater.
Seal all joints. Due to the high temperature, do not enclose the exhaust pipe or place pipe
closer than 6" (152 mm) to combustible material. Extend the runs close to the wall location
selected in Step 1. Support pipes as required in Requirement No. 5, page 10.
WARNING: All vent
terminals must be
positioned or located
away from fresh air
intakes, doors and
windows to preclude
combustion products
from entering occupied
space. Failure to comply
could result in severe
personal injury or death
and/or property damage.
Clearances to Horizontal
Vent Terminal Structure
Minimum Clearances for Vent Terminal
Location (all directions unless specified)
Forced air inlet within 10 ft (3.1M)* 3 ft (0.9M) above
Combustion air inlet of another appliance 6 ft (1.8M)
4 ft (1.2M) horizontally
4 ft (1.2M) below
1 ft (305mm) above
Electric meter, gas meter ** and relief
equipment
U.S. - 4 ft (1.2M) horizontally
Gas regulator ** U.S. - 3 ft (0.9M); horizontally)
Adjoining building or parapet 6 ft (1.8M)
Adjacent public walkways 7 ft (2.1M) above
Grade (ground level) 3 ft (.9M) above***
Door, window, or gravity air inlet (any
building opening)
*Does not apply to the inlet of a direct vent appliance. **Do not terminate the vent directly
above a gas meter or service regulator. *** Consider local snow depth conditions. The vent
must be at least 6” (152mm) higher than anticipated snow depth.
Screened
Exhaust
Assembly,
P/N 53316
Inlet Guard,
P/N 205894
Qty P/N Description
1 205883 Complete Horizontal Vent Kit (Same as Option CC6)
1 205885 Concentric Adapter Box Assembly (See FIGURE 10, page 10.)
1 53316 Screened Exhaust Assembly (illustrated below)
1 205894 Inlet Guard (illustrated below)
4 37661 #10-16 x 1/2" long Screws to attach the inlet guard
2 207232 Brackets for attaching Concentric Adapter Box (See FIGURE 12, page 13.)
1 53335 Tube of High Temperature (450°F) Silicone Sealant