20

plannInG the vent sYsteM

Plan the route of the vent system from the discharge of the bl ower
to the planned location of the vent terminal. Refer to VA A instruction
on page 24 while planning the vent system.
1. Layout total vent system to use a minimum of vent pipe a nd elbows.
2.This waterheateris capableof venting uegasese quivalent
to25’(7.6m)of2”pipe,65’(19.8m)of3”pipe,or128’(39.0m)
of 4” pipe as listed in Table 1.
taBle 1
Number of 2” Maximum 3” Maximum 4” Maximum
90° Elbows Pipe - ft. (m) Pipe - ft. (m) Pipe - f t. (m)
1 20 (6.1) 60 (18.3) 120 (36.6)
2 15 (4.6) 55 (16.8) 112 (34.1)
3 10 (3.0) 50 (15.2) 104 (31.7)
4 -- 45 (13.7) 96 (29.3)
5 -- 40 (12.2) 88 (26.8)
6 -- 35 (10.7) 80 (24.3)
The min imu mven tle ngt hsf ore ach oft hep ipe siz esi son e90 °on top of
theu nitp lus2 ’(61c m)ofs tra ight pipe andt heap prop ria tete rmin atio n.
note: The equivalent feet (m) of pipe listed above are exclusive
of the termination. That is, the termination, w ith an installed
screen, is assumed to be in the system and the remainder of t he
system must not exceed the lengths discussed above.
3. The blower dis charge adapter is made to accept only straight
sections of 2” pipe. To start, a minimum of 2 inches (5.1 cm) of
2” pipe must be attached to the blower discha rge, see Figure 17.
If using 2” inch vent pipe:
A minimum of 2 inches (5.1 cm) must be attached to the blower
beforethe rstelbow. Afterthe rstelbow addthe additional
venting required for the installation. The total syste m cannot
exceed the lengths discussed above, where each elb ow is equal
to 5 feet (1.5 m) of straight pipe.
If using 3” or 4” inch vent pipe:
Two inches (5.1 cm) of pipe must be attached to blower
discharge before adding a reducer to acquire des ired pipe
diameter. An appropriately sized 45 degree schedule 4 0 DWV
elbow (field supplied) vent terminal must be obtained w ith
an equivalent screen (supplied in vent kit). The total system
cannot exceed equivalent pipe lengths discuss ed above
where each elbow is equal to 5 feet (1.5 m) of straight pipe
(3” vent pipe) or 8 feet (2.4 m) of straight pipe (4” vent pipe).
Installation of this water heater must comply wit h CAN/CSA B149.1 -
Natural Gas and Propane Installation Code w hich requires the vent
systemcomponentsbecertiedtoULCS 636.
Thiswaterheaterhasbeendesigncertie dtobeventedwithPVC
orCPVCpipecerti edandmarkedascomply ingwithULCS636.
This water heater is supplied with a 2 inch 22.5 degr ee termination
elbow.Anyoutletpiping,ttingsandglueusedtoventthisappliance
that is not supplied by the manufacturer must compl y with the ULC
S636 requirements.
If water heater is being installed as a replacement fo r an existing
power vented heater in pre-existing venting, a tho rough inspection
of existing venting system must be performed pr ior to any installation
work. Verify that correct material as det ailed above has been used,
and that minimum or maximum vent lengths and termina l location
as detailed in this manual have been met. Carefully inspe ct entire
venting system for any signs of cracks or fractures, par ticularly at
jointsbetweenelb owsandother ttingsandstrai ghtrunsofvent
pipe. Check system for signs of sagging or other stress es in joints
as a result of misalignment of any components in system. If any of
these conditions are found, they must be cor rected in accordance
with venting instructions in this manual before completing installation
and putting water heater into service.
note: a. For water heaters in locations with high ambient
temperaturesabove 100°F(38°C)it isrecommended thatCPVC
pipeandttingsbeused.B. A 22.5 degr ee elbow (2” vent pipe) or
a 45 degree elbow (3” and 4” vent pipe) with an installed screen
VENT TERMINAL must be used in all cases.
4. There will be some installations where c ondensate will be formed
in the horizontal runs of the vent system. This condensate will
run into the condensate boot attached to th e blower and out the
tting.Thewater heaterisshipped withcondensate hosethat
attachestothetting onthecondensateboot. NootherTeeor
ttingisrequired.SeeFigures17,20and21.

condensate

This water heater is a condensing unit and requires a drai n to be
located in close proximity to allow conde nsate to drain safely.
One hose from blower housing, two flexibl e hoses from blower
outlet adaptor, along with another flexible hose fr om VAA if
installed, run to barb fittings on vent pip e assembly #2. Hose
is clamped by rubber clips and flexible hos es by a clamp on
jacket top cover. See Figure 17. Condensate drains from the unit
at the exhaust tee located at the bottom of the unit (see fig ure
16). Condensate from this water heater is mildly acidic. Pleas e
note that some local codes require that con densate is treated
by using a pH neutralizing filter prior to dispo sal.
NOTE: It is important that the field supplie d drain lines beyond
the 1/2” adaptor of vent pipe assembly #1 should be instal led
continuously tilted downward toward an appropr iate drain. See
Figure 16. If these instructions are not followed o r if condensate
drain line is blocked, water will spill from condensa te trap. Do not
block the holes in the hex plug on top of a small tee in vent pipe
assembly #1. As with every water heater installation, a drain pa n
should be used to prevent water damage to surrounding are a. If
necessary, a condensate pump with an incorporated reservoir
may be used to pump water to an appropriate drain. To avoid
condensate spillage, select a pump with an over flow switch.
Caution must be used to ensure that drain is free and cl ear
of debris and will not allow backflow thro ugh the condensate
drain line. Consideration must be given to avoid freezing of
the condensate lines which could result in exce ssive build
up of condensate inside the water heater. Waterproof heat
tape may be required to prevent freezing of condensate lin es.
Please ensure that the outlet of condensate drai n does not
create a slippery condition which c ould lead to personal injury.
Care should be taken to ensure there is no kink or tw ist in any
condensate hose. If a VAA is not installed, the unuse d barb
fitting in vent pipe assembly #2 should be p lugged using one
of the break-away plugs.

Breathing Hazard - Carbon Monoxide Gas

• Do NOT block the holes in the hex plug of vent pipe
assembly #1.
•
Do NOT elevate any portion of the field supplied drain
line beyond the 1/2" adaptor above the adaptor. This
must be true for entire length of the drain line including
the exit into an appropriate drain
.
•
Condensate lines must be free and clear of debris and
must not allow back flow through drain line. Condensate
lines must be able to flow freely to an appropriate drain.
•
Do not allow condensate lines to become crimped closed.
•
Analyze entire vent system to make sure that condensate
will not become trapped in a section of vent pipe and
therefore reduce open cross sectional area of vent.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.