5
According to the CAN/CSA-B149, Natural Gas and Propane
Installation Code, plastic vent systems installed in Canada
must be certified to the STANDARD FOR TYPE BH GAS
VENTING SYSTEMS, ULC S636. Components of the certi-
fied vent system must not be interchanged with other vent
systems or unlisted pipe/fittings. Plastic components and
specified primers and glues of the certified vent system
must be from a single vent system manufacturer and not
intermixed with other vent system manufacturer’s vent
system parts unless those are certified to be used with this
system. Plastic vent systems shall also be installed such
that the first three (3) feet (91 cm) of pipe from the water
heater outlet are readily accessible for visual inspection. The
air intake system does not have to meet the requirement of
ULC S636, so regular schedule 40 PVC or CPVC pipes and
fittings can be used to convey the flow of fresh air to the
water heater.
IMPORTANT
This water heater is a power direct vent gas water heater that
draws all of its combustion air from outside of the building
and vents all of its combustion gases directly outside of the
building.
This water can be vented using only one of the following
options:
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) schedule 40
PVC or CPVC pipe and fittings;
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) polypropy-
lene pipe and fittings from Centrotherm (Innoflue single
wall vent system);
InnoFlue
®
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) polypropy-
lene pipe and fittings from DuraVent (Polypro single wall
gas vent system).
PolyPro
®
Before installing the vent piping, make sure that the vent sys-
tem layout has been properly planned. Make sure that the flue
baffle has been installed in the flue tube. If the baffle is not
present, immediately contact the dealer where the water heater
was purchased.
NEVER
operate the water heater without the
flue baffle installed. Verify that the location of the water heater
respects all clearances from combustible material, all venting
requirements
(see Table 1)
, and that the vent terminations
will be installed as specified by all local codes or, in the absence
of local codes, the latest edition of CAN/CSA B149.1, Natural
Gas and Propane Installation Code, in Canada, and/or the latest
edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54,
in the United States
(see Figure 4)
.
This water heater must be vented directly to the outdoors, either
horizontally through the wall or vertically through the roof. The
venting must not be attached to an existing chimney, or in com-
mon with any other appliance, and must not be insulated. If
possible, locate the water heater so that the venting length and
number of elbows are kept to the minimum necessary to reach
the outside.
Venting Connection to the water heater
PVC PIPE:
A vent system adaptor should be installed when using PVC
pipes for venting this water heater
(see Figure 2)
. The vent
system adaptor supplied with the water heater is made of IPEX
parts. If another manufacturer of pipe is used to build the vent
system, the vent system adaptor must be made from parts of
that same manufacturer. To build the vent system adaptor,
you will need a 2
3/8
inch (6 cm) piece of CPVC pipe and a two
(2) inch (5.1 cm) PVC coupling glued together with the proper
cement.
CPVC PIPE:
The CPVC pipe must be inserted directly into the rubber transi-
tion fitting on the outlet of the blower assembly.
Note:
If your installation requires three (3) inch (7.6 cm) pipe,
you must start with two (2) inch (5.1 cm) pipe and add a two (2)
to three (3) inch (7.6 cm) increaser to change the size of the pipe
to three (3) inches (7.6 cm)
(see Figure 3)
.
POLYPROPYLENE PIPE FROM CENTROTHERM
(Innoflue single wall vent system):
InnoFlue
®
Use special appliance adapter from Centrotherm and insert into
the rubber transition fitting on the outlet of the blower assem-
bly.
Refer to the Table 2 and Figure 5
below for proper
part number from Centrotherm. On the three (3) inch (7.6 cm)
vent pipe, an increaser is necessary.
Table 2 — Centrotherm™
Appliance adapter
Increaser
2-inch (5.1 cm) pipe
ISAA0202
N/A
3-inch (7.6 cm) pipe
ISAA0202
ISIA0203
INSTALLATION INSTRUCTIONS
MAXIMUM EQUIVALENT LENGTH FOR VENT PIPE — DO NOT EXCEED
VENT PIPE DIAMETER FOR 2’’ PDV MODELS ONLY
2 inches (5.1 cm)
3 inches (7.6 cm)
Maximum equivalent length*
50.0 feet (15.2 m)
80.0 feet (24.4 m)
Minimum equivalent length*
7.5 feet (2.3 m)
9.5 feet (2.9 m)
One 45˚ elbow is equivalent, in straight pipe, to
3.0 feet (0.9 m)
4.0 feet (1.2 m)
One 90˚ elbow is equivalent, in straight pipe, to
5.0 feet (1.5 m)
7.0 feet (2.1 m)
Concentric Vent Termination max. length (optional)
40.0 feet (12.2 m)
80.0 feet (24.4 m)
Restrictor Screen
0 to 30 feet (9.1 m)
0 to 80 feet (24.4 m)
Restrictor Screen (for concentric vent termination)
0 to 25 feet (7.6 m)
0 to 80 feet (24.4 m)
*Note: Outdoor termination elbow not to be counted when determining total length.
Table 1
