6
Gas Supply
Gas Requirements
IMPORTANT:
Read the data plate to be sure the water
heater is made for the type of gas you will be using in
your home. This information will be found on the data
plate located near the gas control valve/thermostat. If the
information does not agree with the type of gas available,
do not install or light. Call your dealer.
NOTE:
An odorant is added by the gas supplier to the gas
used by this water heater. This odorant may fade over an
extended period of time. Do not depend upon this odorant
as an indication of leaking gas.
Gas Piping
The gas piping must be installed according to all local and state
codes or, in the absence of local and state codes, the “National
Fuel Gas Code”, ANSI Z223.1(NFPA 54)-current edition.
Tables 1 and 2 on page 7 provides a sizing reference for
commonly used gas pipe materials. Consult the “National
Fuel Gas Code” for the recommended gas pipe size of other
materials.
Refer to Figure 5
NOTE:
When installing gas piping, apply approved pipe joint
compound.
1. Install a readily accessible manual shut-off valve in the
gas supply line as recommended by the local utility.
Know the location of this valve and how to turn off the
gas to this unit.
2. Install a drip leg (if not already incorporated as part of
the water heater) as shown. The drip leg must be no
less than three inches long for the accumulation of dirt,
foreign material, and water droplets.
3. Install a ground joint union between the gas control
valve/thermostat and the manual shut-off valve. This
is to allow easy removal of the gas control valve/
thermostat.
4. Turn the gas supply on and check for leaks. Test all
connections by brushing on an approved noncorrosive
leak-detection solution. Bubbles will show a leak.
Correct any leak found.
Manual Gas
Shut-off Valve
Ground
Joint
Union
Drip Leg
3” Minimum
Check with local
utility for
minimum height
Figure 4
Gas Piping
Gas Pressure
IMPORTANT:
The gas supply pressure must not exceed the
maximum supply pressure as stated on the water heater’s data
plate. The minimum supply pressure is for the purpose of input
adjustment.
Gas Pressure Testing
IMPORTANT:
This water heater and its gas connection must
be leak tested before placing the appliance in operation.
•
If the code requires the gas lines to be tested at a pressure
exceeding 14” W.C., the water heater and its manual shut-
off valve must be disconnected from the gas supply piping
system and the line capped.
•
If the gas lines are to be tested at a pressure less than
14” W.C., the water heater must be isolated from the gas
supply piping system by closing its manual shut-off valve.
U.L. recognized fuel gas and carbon monoxide (CO) detectors
are recommended in all applications and should be installed
using the manufacturer’s instructions and local codes, rules, or
regulations.
NOTE:
Air may be present in the gas lines and could prevent
the pilot from lighting on initial start-up. The gas lines should
be purged of air by a qualified person after installation of the
gas piping system. While purging the gas piping system of air,
make sure that the fuel is not spilled in the area of the water
heater installation, or any source of ignition. If the fuel is spilled
while purging the piping system of air follow the “WHAT TO DO
IF YOU SMELL GAS” instructions on the cover of this manual.
LP Gas Only
Explosion Hazard
Use a new CSA approved gas supply line.
Install a shut-off valve.
Failure to follow these instructions can
result in death, explosion, or
carbon monoxide poisoning.
WARNING
Do not connect a natural gas water heater to
an L.P. gas supply.
Do not connect an L.P. gas water heater to
a natural gas supply.
Explosion Hazard
Have a qualified person make sure L.P. gas
pressure does not exceed 13” water column.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Failure to do so can result in death,
explosion, or fire.
WARNING