Venting
Make certain to observe the vent location limitations com-
plying with the
"Natural Gas and Propane Installation
Code" CSA-B149.1
or
"National Fuel Gas Code" ANSI
Z223.1 (NFPA 54)
and/or local codes. There is some impor-
tant information shown in Figure 3.
Vent Terminal must be located
at least 305mm (12 in.) from
Windows, Doors, or any other
Opening through which flue
gases could enter the building.
Any Forced Air Inlet
into the building
V
ent
Terminal must be located at least 457mm
(18 in.) from any overhang or building corner
or other irregularity
.
305mm (12 in.) Min. above
grade. Higher in Areas of
Heavy Snowfall
Within 1.8m (6 ft.)
915mm
(36 in.)
Min.
305mm
(12 in.)
Min.
Vent terminal must
be located at least
915mm (36 in.)
above any Forced Air
Inlet into the building
within 3m (10 ft.) of
the Vent Terminal
457mm (18 in.)
Min.
Figure 3 - Vent Location Limitations
For a second or more direct vent unit, the distance between
vent terminals must have a minimum of 305mm (12 in.).
INSPECT SHIPMENT –– There may be hidden damage
caused by transit. Check to be certain all parts of the venting
system, as shown in Figures 3A through 3M, are present.
Inspect the upper and lower air inlet boxes, rear air tube and
all parts of the venting system (see Figure 2A).
CAUTION
If there are any damaged parts, DO NOT install this water
heater. Report any shortage to your distributor and damage
to your carrier.
Note:
The four fasteners that are required to secure the vent
terminal to the exterior wall are not provided. These should
be screw type (not nails) chosen for the type of construction
and obtained locally.
CAUTION
Cut edges of corrugated (flex) pipe are extremely sharp.
Wear gloves when handling.
Vent connections
After the location for the vent terminal has been selected
as outlined in Figure 3, use the following illustrations for
installation:
178mm (7 in.)
DIAMETER
MINIMUM
(SEE TEXT)
BOTTOM OF HEATER
Figure 3A - Locating Clearance Hole For Vent.
Cut a clearance hole, approximately 178mm (7 in.) in diam-
eter, through the exterior wall for the vent assembly. The
minimum height should not be less than 1.72m (68 in.) for
40 gal. models and not less than 1.93m (76 in.) for 50 gal.
models, as measured from the hole center to bottom of
water heater. The maximum height recommended is 2.28m
(90 in.) or in compliance with Figure 3M.
* If the exterior wall is less than 356mm (14 in.) thick, the
clearance from the vent to combustible materials within
the hole can be 0mm (0 in.). If the wall thickness exceeds
356mm (14 in.), maintain a clearance of 25mm (1 in.) to
combustible materials within the hole.
432mm.
(17 in) MIN.,*
2.28m. (90 in)
MAX.
76mm
(3 in.)
102mm
(4 in.)
102mm
(4 in.)
WALL
Figure 3B - Moving Water Heater To Its Final Installed
Location.
Move the water heater to its final installed location. Make
certain clearances from combustible material are observed.
The maximum distance from center of water heater to out-
side wall must not be more than 2.28m (90 in.).
* If the horizontal distance is less than 760mm (30 in.), the
restricter plate must be installed (see Figures 3N & 3O).
CLAMP
SPRING
Figure 3C - Vent Assembly.
The vent pipe and terminal are assembled by the manu-
facturer as shown in Figure 3C. There are springs fastened
inside the corrugated pipe. When the vent pipes are pulled
to a required length, the distances between the springs will
still be equally spaced.
– 7 –
