Reliance Water Heaters 317686-000 用户手册

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discharge opening must not be blocked or reduced in size under any 

circumstances. Excessive length, over 30 feet (9.14 m), or use of

more than four elbows can cause restriction and reduce the discharge 

capacity of the valve.

No  valve  or  other  obstruction  is  to  be  placed  between  the 

Temperature-Pressure  Relief  Valve  and  the  tank.  Do  not  connect 

discharge piping directly to the drain unless a 6” (15.2 cm) air gap is

provided. To prevent bodily injury, hazard to life, or property damage, 

the  relief  valve  must  be  allowed  to  discharge  water  in  adequate 

quantities  should  circumstances  demand.  If  the  discharge  pipe  is 

not  connected  to  a  drain  or  other  suitable  means,  the  water  flow

may cause property damage.

Temperature-Pressure Relief Valve discharge

  pipe must terminate at adequate drain.

•  Should not be smaller in size than the outlet pipe size of the valve, or 

  have any reducing couplings or other restrictions.
•  Should not be plugged or blocked.
•  Should not be exposed to freezing temperatures.
•  Should be of material listed for hot water distribution.
•  Should be installed so as to allow complete drainage of both the 

  Temperature-Pressure Relief Valve and the discharge pipe.
•  Must terminate a maximum of six inches above a floor drain or external 

  to the building. In cold climates, it is recommended that the discharge 

  pipe be terminated at an adequate drain inside the building.
•  Should not have any valve or other obstruction between the relief 

  valve and the drain.

Burn hazard.

Hot water discharge.

Keep clear of Temperature-

  Pressure Relief Valve

  discharge outlet.

The Temperature-Pressure Relief Valve must be manually operated at 

least twice a year. Caution should be taken to ensure that (1) no one

is in front of or around the outlet of the Temperature-Pressure Relief 

Valve discharge line, and (2) the water manually discharged will not

cause any bodily injury or property damage because the water may be 

extremely hot. If after manually operating the valve, it fails to completely 

reset and continues to release water, immediately close the cold water 

inlet to the water heater, follow the draining instructions in this manual, 

and replace the Temperature-Pressure Relief Valve with a properly 

rated/sized new one.

note: The purpose of a Temperature-Pressure Relief Valve is to 

prevent excessive temperatures and pressures in the storage tank. 

The T&P  valve  is  not  intended  for  the  constant  relief  of  thermal 

expansion. A properly sized thermal expansion tank must be installed 

on all closed systems to control thermal expansion, see Closed Water 

Systems and Thermal Expansion on page 14 and 15.

If you do not understand these instructions or have any questions 

regarding  the  Temperature-Pressure  Relief  Valve  call  the 

toll  free  number  listed  on  the  back  cover  of  this  manual  for  

technical assistance.

This heater is approved for operation up to 5,300 feet (1,615 m)

without alteration. High altitude models are available from the factory 

for elevations between 5,300 feet (1,615 m) and 10,100 feet (3,079

m).  For  elevations  above  10,100  feet  (3,079  m)  the  input  rating

should be reduced at the rate of 4 percent for each 1,000 feet (305

m) above sea level which requires replacement of the burner orifice

in accordance with National Fuel Gas Code (ANSI Z223.1/NFPA 54).

Contact your local gas supplier for further information.

Failure to replace standard orifice with a high altitude orifice when

installed above 10,100 feet (3,079 m) could result in improper and

inefficient operation of the appliance, producing carbon monoxide

gas in excess of safe limits, which could result in serious injury or 

death. Contact your gas supplier for any specific changes which

may be required in your area. 

Do  not  use  water heater with any

gas other than the gas shown on

the rating plate.

Excessive  pressure to gas control

valve can cause serious injury or death
Turn off gas lines during installation.

Contact qualified installer or 

service agency.

Make sure the gas supplied is the same type listed on the model 

rating plate. The inlet gas pressure must not exceed 14 inch  water 

column (3.5 kPa) for natural and propane gas (L.P.). The minimum

inlet gas pressure shown on the rating plate is that which will permit 

firing at rated input.
All gas piping must comply with local codes and ordinances or with the 

National Fuel Gas Code (ANSI Z223.1/ NFPA-54). Copper or brass

tubing and fittings (except tin lined copper tubing) should not be

used.
If the gas control valve is subjected to pressures exceeding 1/2 psi 

(3.5 kPa), the damage to the gas control valve could result in a fire

or explosion from leaking gas.
If  the  main  gas  line  Shuttoff  serving  all  gas  appliances  is  

used,  also  turn  “off”  the  gas  at  each  appliance.  Leave  all

gas  appliances  shut  “off”  until  the  water  heater  installation  

is complete.