Use & Care Manual
Pressure Testing the Gas Supply System
The water heater and its individual shut-
off valve must be disconnected from the
gas supply piping system during any pres-
sure testing of that system at test pressures
in excess 1/2 psi (3.5 kPa).
The water heater must be isolated from the
gas supply piping system by closing its
individual manual gas shutoff valve during
any pressure testing of the gas supply at
test pressures equal to or less than 1/2 psi
(3.5 kPa).
11
High Altitude
Input rating of this water heater is based on
sea level operation. At higher elevations
the actual input rate may be lower than the
value listed on the rating label due to the
derating of Natural Gas and LP Gas. This
water heater can be installed at elevations
up to 5,999 ft. (1,828 m) above sea level.
!
WARNING: Failure
to install a water heater
suitable for the altitude at
the location it is intended
to serve, can result in
improper operation of
the appliance resulting
in property damage and/
or producing carbon
monoxide gas, which could
result in personal injury, or
death.
Vent and Combustion Air-Inlet
This water heater is a direct vent appli-
ance and must be installed so that all the
air for combustion is derived directly from
the outside atmosphere and all the flue
gases are discharged to the outside atmo-
sphere. For proper installation of the vent
and combustion air-inlet systems, follow
the instructions as detailed in this manual
and those per the current edition of CAN/
CSA B149.1 Natural Gas and Propane
Installation Code. DO NOT connect this
water heater to an existing vent or chim-
ney - it must be vented separately from all
other appliances.
This water heater must be vented to the
outdoors with a venting system that is
certified to the Underwriter’s Laboratories
of Canada Standard, ULC-S636 (Current
Edition).
The vent system must be installed in
accordance with the vent system manu-
facturer’s installation instructions.
The first 3 ft. (90 cm) from the appliance
flue outlet must be readily accessible for
visible inspection.
NOTICE: This unit must be vented
using only 2 in. (5.1 cm), 3 in. (7.6 cm) or
4 in. (10.2 cm) diameter PVC or CPVC
pipe and fittings that are certified to
ULC-S636, refer to pages 11 through
28 for approved diameters and allow-
able equivalent lengths by water heater
model.
IMPORTANT: For 50 Gallon Models
with inputs of 65,000 & 47,000 Btu/
hr. and 75 Gallon Power Direct Vent
Models ONLY: The first 10 ft. (3 m)
equivalent vent system length from the
blower assembly must be of ULC-S636
approved CPVC pipe and fittings.
Use only ULC-S636 approved CPVC
pipe and fittings for the vent system
if the water heater is to be installed in
a location where it may be subjected
to ambient temperatures above 100°F
(38°C).
Vent and combustion air-inlet systems must
be adequately supported along both vertical
and horizontal lengths.
DANGER: Failure to
properly install the vent
and combustion air-inlet
systems as outlined in the
Vent and Combustion Air-
Inlet section of this manual
will result in unsafe
operation of the water
heater causing bodily
injury, explosion, fire or
death.
To avoid the risk of fire,
explosion, or asphyxiation
from carbon monoxide,
NEVER operate the
water heater unless it is
properly vented and the
vent and combustion air-
inlet systems are properly
installed as detailed in the
"Vent and Combustion
Air-Inlet" section of this
manual.
NOTICE: The combustion
air-inlet system pipe and
ttings are not required to
be certied to ULC-S636.