54
According to the CSA B149.1, 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 certified
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 rigid 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 rigid pipe and fittings from DuraVent®(PolyPro®single
wall vent system).
PolyPro
®
Use of cellular core PVC (ASTM F891), cellular core CPVC, or
Radel®(polyphenolsulfone) in non-metallic venting systems is
prohibited.
Before installing the vent piping, make sure that the vent
system 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 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 pos-
sible, 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
23/8inch (6 cm) long piece of two (2) inch 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 (5.1 cm to 7.6 cm) increaser to change the size
of the pipe to three (3) inches (7.6 cm) (see Figure 3).
CENTROTHERM™ POLYPROPYLENE PIPE
InnoFlue
®
(InnoFlue®single wall vent system):
Use special appliance adapter from Centrotherm™and insert
into the rubber transition fitting on the outlet of the blower
assembly. 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* 50.0feet (15.2 m) 180.0feet (54.9 m)
Minimum equivalent length* 7.5feet (2.3 m) 9.5feet (2.9 m)
One 45˚ elbow is equivalent, in straight pipe, to 3.0feet (0.9 m) 4.0feet (1.2 m)
One 90˚ elbow is equivalent, in straight pipe, to 5.0feet (1.5 m) 7.0feet (2.1 m)
Concentric Vent Termination max. equivalent length (optional) horizontal 40.0 feet (12.2 m) 180.0 feet (54.9 m)
Concentric Vent Termination max. equivalent length (optional) vertical 40.0feet (12.2 m) 180.0feet (54.9 m)
Restrictor Screen 0 to 30feet (9.1 m) 0 to 80feet (24.4 m)
Restrictor Screen (for concentric vent termination) 0 to 25feet (7.6 m) 0 to 80feet (24.4 m)
*Note: Outdoor termination elbow not to be counted when determining total length.
Table 1
