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.
Gas Piping
Fire and Explosion Hazard
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 Natural Gas and Propane Installation Code (CAN/CSA B149.1). 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
A gas line of sufficient size must be run to the water heater. Consult the current edition of the Natural Gas and Propane Installation Code (CAN/CSA B149.1) and your gas supplier concerning pipe size.
There must be:
•A readily accessible manual shut off valve in the gas supply line serving the water heater, and
•A drip leg (sediment trap) ahead of gas control valve to help prevent dirt and foreign materials from entering the gas control valve.
•A flexible gas connector or a ground joint union between the shut off valve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the water heater. Use a soapy water solution, not a match or open flame. Rinse off soapy solution and wipe dry.
Use pipe joint compound or teflon 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
Connecting gas piping to the gas control valve of water heater can be accomplished by either of two methods shown in Figures 12 and 13.
FIGURE 12. GAS PIPING WITH
FLEXIBLE CONNECTOR.
FIGURE 13. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL.
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