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INSTALLATION INSTRUCTIONS
2) Open the cold water supply manual shut-off valve. This
valve must remain open, as long as the water heater is
in use. NEVER operate the water heater with the cold
water supply manual shut-off valve closed.
3) To make sure the water heater is completely full of
water, open all of the hot water faucets in the house
to let the air out of the water heater and plumbing
system. Leave the faucets open until a constant flow
of water is obtained.
4) Check all of the plumbing connections to make sure
there are no leaks.
WARNING
NEVER operate the water heater unless it is complete-
ly filled with water. Failure to follow this instruc-
tion can result in premature failure of the water
heater that is not covered by the warranty.
Gas Connections
WARNING
DO NOT attempt to use this water heater with
any gas other than the type of gas shown on
the water heater rating plate. Failure to follow
this instruction can result in property damage, per-
sonal injury, or death.
The gas piping must be installed as indicated in
Figure 12. For the correct size of piping for this water
heater, consult CAN/CSA B149.1, National Gas and
Propane Installation Codes (in Canada) and/or the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
in the United States. Only new piping with cleanly
cut threads may be used, together with a suitable
sealing compound that is approved for natural and pro-
pane gases. It is mandatory that a readily accessible man-
ual shut-off valve be installed in the gas supply line. The
gas supply manual shut-off valve must be close to the
water heater. A drip leg (sediment trap) must be installed
in the gas line ahead of the gas control valve to prevent
dirt from entering it. A union must be installed between
the gas control valve and the gas supply manual shut-off
valve for easy maintenance of the water heater.
WARNING
NEVER use an open flame to test for gas leaks. A fire
or explosion could occur resulting in property dam-
age, personal injury, or death.
The water heater and its gas connection must
be leak tested before placing the appliance into opera-
tion. To leak test the system:
1) Turn on the manual gas shut-off valve near the
water heater.
2) Use a soapy water solution to test all connections
and fittings for leaks. Bubbles indicate a gas leak.
3) Correct all leaks.
Make sure that the inlet pressure to the water heater does
1
not exceed
/
psi (3.5 kPa) for both natural and propane
2
gases. Pressures in excess of
the gas control valve, resulting in a fire or explosion from
leaking gas. For purposes of adjustment, the minimum inlet
pressure is indicated on the water heater rating plate.
If any pressure testing of the gas line is under-
taken at test pressures in excess of
the water heater and its gas supply manual shut-off
valve must be disconnected from the gas supply
piping system and the end of the pipe sealed with a
female cap. If the testing is to be undertaken at a test
1
pressure less than
/
psi (3.5 kPa), the gas supply man-
2
ual shut-off valve must be closed.
WARNING
U.L. and CSA recognized fuel gas and Carbon
Monoxide (Co) detectors are recommended in all appli-
cations and should be installed using the manufactur-
er's instructions and local codes, rules or regulations.
Installation Instructions for Water Heaters
Approved for Space Heating and
Potable Water Heating (see Figure 15)
A water heater cannot be used for space heating
applica tion only. When using a water heater for space
and potable water heating, the instructions provided
in this manual and with the air-handling unit must be
respected and, in particular, the following:
1) All piping and components that are used in the
system must be of a nonferrous type suitable for
potable water. This also applies to any sealant used.
2) When used as a dual purpose water heater, it must
not be connected to any system that has been previ-
ously used for non-potable water heating. This includes
any piping because, in all probability, existing piping
would have been, in the past, treated with chemicals
for cleaning or sealing the system.
3) If this water heater is to be used for space heating,
make sure that all safety codes are respected. Pay
special attention to safety valve pressure and expan-
sion tanks.
4) Do not use toxic chemicals to clean the potable
water heating system.
5) Where water temperature in excess of 140
is required for a space heating application, a mixing
valve must be installed in the potable side of the
system. This will temper the water and reduce the
risk of scalding.
14
1
/
psi (3.5 kPa) can damage
2
1
/
psi (3.5 kPa),
2
o
o
F (60
C)
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