GSW PART NO.70999 REV.G (03-12) Manuel D’Utilisation

– 6 –

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.

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?

Check Here

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?

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.