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The appliance and its gas connections must be leak tested
before placing the appliance in operation. Use a leak test
solution, not a match or open fl ame.
NOTE: An alternate location for the gas line entry is
possible. Drill a suitable hole centered on the crosshairs
on the left side panel.
Use pipe joint compound or Tefl on tape marked as being
resistant to the action of petroleum [Propane (L.P.)]
gases.
The appliance and its gas connection must be leak tested
before placing the appliance in operation.
The appliance and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing of the system at test pressures in
excess of 1/2 psi (3.5 kPa).
It shall be isolated from the gas supply piping system
by closing its individual manual shut-off valve during
the pressure testing, the gas supply piping system at
test pressures equal to or less than 1/2 psi (3.5 kPa) is
considered isolated.
SEDIMENT TRAPS
A sediment trap shall be installed as close to the gas inlet
of the water heater as practical at the time of water heater
installation. The sediment trap shall be either a tee fi tting
with a capped nipple in the bottom outlet or other device
recognized as an effective sediment trap.
Contaminants in the gas lines may cause improper
operation of the gas control valve that may result in fi re
18
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or explosion. Before attaching the gas line be sure that all
gas pipe is clean on the inside. The sediment trap must
be readily accessible. Install in accordance with the "Gas
Piping" section. Refer to the current edition of CAN/CSA-
B149.1, the Natural Gas and Propane Installation Code.
GAS LINE PURGING
Air may be present in the gas lines and could prevent
the burner from lighting on initial start-up. The gas lines
should be purged of air by a qualifi ed service technician
after installation of the gas piping system.
HIGH ALTITUDE INSTALLATIONS
WARNING
Breathing Hazard - Carbon Monoxide Gas
• Special consideration must be taken
with installations above 3.352m (11,000').
• Please contact an AO Smith qualified
service agent to obtain proper setup and
instructions before lighting.
• Failure to implement the proper setup
will result in improper and inefficient
operation of the appliance resulting in
production of increased levels of carbon
monoxide gas in excess of the safe
limits which could result in serious
personal injury or death.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
The heater is set at the factory to operate at altitudes from
sea level to 1,067m (3,500 ft.). Accessory kits are available
to allow the heater to operate at altitudes higher than
1,067m (3,500 ft.). These accessory kits are listed in the
table below. Instructions for installing these accessories
are included in the kits.
Altitude m (ft.)
1,067 -1,981 (3,501 - 6,500)
1,981 - 2,591 (6,501 - 8,500)
2,591 - 3,352 (8,501 - 11,000)
Rated inputs are suitable up to 3,352m (11,000 ft.)
elevation. Consult the factory for installation at altitudes
over 3,352m (11,000 ft.).
WARNING: THIS HIGH EFFICIENCY WATER HEATER
IS CERTIFIED FOR USE AT AN ALTITUDE OF 11,000
Ft. (3,352 METERS). HOWEVER, FOR USE AT
ALTITUDES OVER 3,500 Ft. (1,067m) THE PCB MUST
BE CHANGED.
Some gas utility companies derate their gas for altitude,
making it unnecessary to modify the water heater for high
altitude installations. Call the local gas or utility company
to verify BTU content.
Kit #
9007439005
9007440005
9007441005
316888-001 Rev. 00 dRaFt Jun 28 245
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