7.2.2
HORIZONTAL VENT
TERMINAL Installation
- Option CC6
Components Required - Factory and Field
Parts in the Horizontal
Vent/Combustion Air
Terminal Package
(Option CC6)
Complete Horizontal Vent/Combustion Air Terminal Kit (Same as Option
CC6), P/N 221247
Qty
P/N
Description
1
221069
Concentric Adapter Box with Silicone Sealing Ring (See
Paragraph 7.2.1.9
, pages 18-19.)
1
221089
Bird Screen for Exhaust Outlet
1
124940
Ring Guard for Air Inlet
4
37661
#10-16x1/2" lg Screws to attach the inlet air guard
4
221186
Spacers for inlet air guard
1
221091
4" PVC Cap for Vent Condensate Drain Connection (See
FIGURE 8A and 9A
on page 14 and 15.)
Field-supplied
requirements:
• Vent pipes and fittings
as illustrated in
FIGURE 8A, 8B, 9A or 9B
on
pages 14 and 15 and an elbow (22.5° elbow if available) as shown in
FIGURE 16
, page 23
• Combustion air pipes (6” and 8” single-wall galvanized pipe)
• Flashing
• Sheetmetal screws, tape, primer, cement, and sealant as required
Before beginning, verify that the kit is at the site and that all components
are correct for the installation. Be sure all required field-supplied parts are
available.
Installation Instructions
for
Horizontal Vent/
Combustion Air Kit
Option CC6
(
in compliance with
requirements on
pages 13-19)
1. Determine the location on the outside wall for the vent/combustion
air terminal.
Location must comply with vent length requirement in Para-
graph 7.2.1.4 on page 16. Also, read the “Hazards of Chlorine” on page 6
concerning location of the combustion air inlet.
In most applications, the terminal will be on approximately the same level
as the heater. Allow for 1/4” per foot (6mm per 305mm)
downward pitch
of the vent pipe from the concentric adapter toward the heater
for
condensate to drain.
Minimum clearances for the horizontal vent terminal are shown in the table
on page 21. Avoid positioning the vent terminal above a walkway as there
may be a small amount of condensate that drips from the end of the vent/
combustion air terminal. In cold climates, the condensate may form icicles.
Also, select a location that complies with adjoining building clearances as
shown in
FIGURE 16
, page 23.
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.
WARNING: All vent terminals must be positioned or lo
-
cated 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.
7.2 Venting and
Combustion Air
(cont’d)
7. Mechanical
(cont’d)
WARNING: In climates
with below freezing
temperatures, con-
densate may form
icicles on the vent
terminal. Locate the
terminal where a fall-
ing icicle would not
be a hazard.
Form I-UEAS, Page 20
