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WARNING
Do not attempt to operate this water heater
with the cold water inlet valve closed.
Manually operate the Temperature and
Pressure Relief valve at least once a year.
Standing clear of the outlet (discharge water
may be hot), lift and release the lever handle
on the Temperature and Pressure Relief
valve to make the valve operate freely.
NEVER OPERATE THE HEATER IF IT IS
NOT COMPLETELY FILLED WITH WATER.
TO MAKE SURE THE HEATER IS FILLED,
OPEN A HOT WATER TAP UNTIL A FULL
FLOW OF WATER IS VISIBLE WITH NO
AIR ESCAPING.
PRESSURE BUILD-UP IN A WATER SYSTEM
During the heating cycle of the water heater the water
expands, creating a pressure build-up in the water
system. The water supply meter may contain a check
valve or back flow preventer. This will create a closed
water system. A temperature and pressure relief valve
must be installed on the water heater (150 PSI maximum
pressure setting. See temperature and pressure relief
valve).
If a water heater is installed in a closed water supply
system, the relief valve will discharge water as the
volume of water expands with rising water temperatures.
This is normal and indicates a normal functioning of the
relief valve. Do not plug the relief valve. Only if the
discharge from the relief valve is continuous or for an
extended period of time would this indicate a
malfunction. Have the operation of the heater checked
by a qualified serviceman.
1. Have the vent location limitations and minimum
height for vent termination and maximum vent
length been checked?
2. Are the terminal and vent pipes installed and
sealed properly?
3. Has the gas piping been leak tested?
4. Is there at least a 1” clearance between the
water heater and combustible materials, 20” at
the top and 1” around the vent pipe?
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5. Have you taken steps to prevent water damage
in case of leaks?
6. Is the diptube installed in the cold water inlet
connection?
7. Is the water heater completely filled with water?
8. Does the gas piping conform with the
recommendations of your Local Gas Utility
Company?
9. Is the vent terminal opening unobstructed?
10.Is a temperature and pressure relief valve
installed?
11.Is the drain pipe from the T & P valve
unobstructed?
12.Has all plastic and cardboard packaging
material been removed from the heater and
venting?
Pressure rating of the valve must not exceed the working
pressure shown on the rating plate of the water heater.
The discharge capacity must be equal to or greater than
the input to the water heater. Temperature and Pressure
Relief valve piping must terminate 6 inches, no more than
12” (reference the applicable code) above a floor drain or
external to the building. Do not thread, cap, or plug the
end of this discharge line. Be certain that no contact is
made with any live electrical part. Do not connect
discharge line directly to drain. See Figure 2. To prevent
bodily injury, hazard to life or damage to property, the
relief valve must be allowed to discharge water in the
event of excessive temperature or pressure developing in
the water heater. The function of the temperature and
pressure relief valve is to discharge water in quantities
should circumstances demand. If the discharge pipe is
not directed to drain as shown in Figure 2 or other
suitable means, the water flow may cause property
damage.
The discharge line:
1) must not be smaller than the outlet pipe size of the
relief valve,
2) must not be plugged or blocked,
3) must be material capable of withstanding 210°F
without distortion,
4) must be installed so as to allow complete drainage of
both temperature and pressure relief valve,
5) must terminate at an adequate drain, and
6) must not have any valve between the relief valve and
the water heater.
IF the answer to all of the above questions is “YES”
proceed with lighting the heater.
INSTALLATION CHECK LIST