11
INSTALLATION INSTRUCTIONS
Gas Connections
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,
personal injury, or death.
The gas piping must be installed as indicated in
Figure 9
. 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
propane gases. It is mandatory that a readily
accessible manual 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 shutoff
valve for easy maintenance of the water heater.
NEVER
use an open flame to test for gas leaks. A
fire or explosion could occur resulting in property
damage, personal injury, or death.
The water heater and its gas connection must be
leak tested before placing the appliance into
operation. 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 not exceed 1/2 psi (3.5 kPa) for both natural
and propane gases. Pressures in excess of 1/2 psi
(3.5 kPa) can damage 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 undertaken
at test pressures in excess of 1/2 psi (3.5 kPa), 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
pressure less than 1/2 psi (3.5 kPa), the gas supply
manual shut-off valve must be closed.
A high altitude orifice
MUST BE
installed for
water heaters operating above 2,000 feet (610 m).
Failure to follow this instruction can result in
property damage, personal injury, or death.
Installation Instructions for Water Heaters
Approved for Space Heating and
Potable Water Heating (seee figure 10)
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
previously 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
expansion tanks.
4) Do not use toxic chemicals to clean the potable
water heating system.
5) Where water temperature in excess of 140˚F (60˚C)
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.
6) If the incoming water line to the heater is equipped
with a check valve, water meter, or pressure-
reducing valve, an expansion tank must be installed
in the system. This will prevent weeping from the
water heater relief valve and premature failure of the
heater due to expansion of the water during the
heating cycle.
WARNING
WARNING
WARNING
Man Inst DirVen An-1011 10/11/11 3:07 PM Page 12
