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GENERAL RULES TO FOLLOW
FOR SAFE OPERATION
1. You should follow these instructions when you install your
heater. In the United States: The installation must conform
with local codes or, in the absence of local codes, the
National Fuel Gas Code ANSI Z223.1/NFPA 54.
In Canada: The Installation should conform with CGA
B149.(1,2) INSTALLATION CODES and /or local installation
codes.
2. Carefully plan where you install the heater. Correct
combustion air supply and flue pipe installation are very
important. If not installed correctly, fatal accidents can be
caused by lack of air, carbon monoxide poisoning or fire.
3. The place where you install the heater must have
enough ventilation. The National Fire Codes do not allow
gas fired water heater installation in bathrooms,
bedrooms or any occupied rooms normally kept closed.
See the section below on locating the heater.
4. You must install your heater so that the venting complies
with all requirements. See section on Venting the Heater,
pages 6 and 7.
5. The appliance must be disconnected from the gas supply
piping system during any pressure testing at pressures in
excess of 1/2 Psig (3.5 kPa).
The appliance must be isolated from the gas supply piping
during any pressure testing of the gas supply piping system
at test pressures in excess of 1/2 Psig (3.5Kpa). The
appliance and its gas connection must be leak tested before
placing the appliance in operation.
6. Keep water heater area clear and free from combustibles
and flammable liquids. Do not locate the heater over any
material that might burn. Do not install heater over carpeting.
7. Correct gas pressure is critical for the optimum
operation of this heater (see specifications on page 2 and
chart on page 9). Gas piping must be sized to provide the
required pressure at the maximum output of the heater.
Check with your local gas supplier, and see the section on
connecting the gas supply.
8. Should overheating occur or the gas supply fail to shut
off, turn off the gas supply at the manual gas shut off valve
on the gas line.
9. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the control
system and any gas control that has been under water.
10. When installed, the appliance must be electrically
grounded in accordance with local codes or, in the absence
of local codes, in accordance with the National Electrical
Code ANSINFPA 70 and/or the CSA 22.1 Electrical Code.
PROPER LOCATION FOR INSTALLING YOUR
HEATER
Carefully select the location of your new heater. For your
safety and for proper heater operation, you must provide an
abundant supply of combustion air and a proper venting
installation.
The heater may still operate even when improperly vented.
It will, however, be less efficient and could eventually damage
the heater. It could even result in human sickness or death
due to oxygen deprivation and carbon monoxide poisoning.
Before installing the unit, be certain you have the correct
heater for your type of Gas – Propane or Natural Gas.
Identification labels are found on the shipping box, and on
the rating plate which is located on the right side panel of
the cover. Also, each burner orifice is stamped with a number
(79 for LPG and 120 for Natural Gas).
Follow the guidelines below:
1. National building codes require that you do not install
this appliance in bathrooms, bedrooms, unvented closet
or any occupied rooms normally kept closed.
2. Simultaneous operation of other appliances such as
exhaust fans, ventilation systems, clothes dryers, fireplaces
or wood stoves could create a vacuum effect in your home
which could cause dangerous combustion by-products to
spill back into your home rather than venting to the outside
through the flue. Confirm that your 425 EF is venting
properly when all these other appliances are running. See
page 6 to test venting performance.
Do not obstruct the flow of combustion air to the
appliance. This appliance is power vented and uses room
air. Note: Electrical power is required to operate the power
exhaust. Proper air supply to the appliance is essential.
If installed near a clothes dryer it is very important that the
dryer be properly vented. Failure to properly vent a dryer
could result in a gradual accumulation of lint on the water
heater fin coils and burners, leading to a dangerous condition
of vent blockage and poor, unsafe combustion.
3. Your hot water lines should be kept short to save energy.
It is always best to have hot water lines insulated.
WARNING: DO NOT INSTALL IN AN AREA WHERE
IT COULD FREEZE. This heater is neither designed for
nor approved for outside installation. Drain the heater
entirely if freezing temperatures are anticipated in area where
heater is installed by disconnecting both the inlet and outlet
water connections from the heater (disconnect the outlet
flex line from where it connects to the copper heat
exchanger). Additionally, remove the drain plug under the
water valve. See Fig 1.
Fig. 1 - Water heater drain plug
WARNING: Flammable materials, gasoline,
pressurized containers, or any other items or articles that
are potentially fire hazards must NOT be placed on or
adjacent to the heater. The appliance area must be kept
free of all combustible materials, gasoline and other
flammable vapors and liquids.