Enviro 6G50 76N - Manuel (Page 17)

17
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 Shut-off 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.
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 Shut-off valve should be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of 1/2
pound per square inch (3.5 kPa). It should be isolated from the gas
supply piping system by closing its individual manual Shut-off valve
during any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 pound per square inch (3.5 kPa).
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.