22
Supply Gas Installation
• The gas supply inlet connection is a 3/8 inch NPT
female connector. For detailed location of this
connector see the drawing on page 8. If a circulating
fan or isolating valve is to be installed, adjust the
routing of the gas line to suit.
• Use only new black iron or steel pipes or copper
tubing if acceptable—check local codes.
Note that
in USA, copper tubing must be internally tinned for
protection against sulfur compounds.
• Unions in gas lines should be of ground joint type.
• The gas supply line must be sized and installed
to provide a supply of gas suf
fi
cient to meet the
maximum demand of the appliance without undue
loss of pressure.
• Sealant used must be resistant to the action of all
gas constituents including LP gas. Sealant should
be applied lightly to male threads to ensure excess
sealant does not enter gas lines.
• The supply line should include a
manual shut-
off valve
and
union
to allow the appliance to be
disconnected for servicing.
• Pressure test the supply line for leaks.
• The appliance and its individual shut-off valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at test pressures in excess of 1/2
psig (3.5 kPa).
• The appliance must 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 psig (3.5
kPa).
• Failure to either disconnect or isolate the appliance
during pressure testing may result in regulator or
valve damages and void the warranty. Consult your
dealer in case of damages.
• The minimum supply pressure is given in the
Specifi cations
section of this manual—page 8.
• All piping and connections must be tested for leaks
after installation or servicing. All leaks must be
corrected immediately.
• When testing for leaks:
• Make sure that the appliance is turned off.
• Open the manual shut-off valve.
• Test for leaks by applying a liquid detergent
or soap solution to all joints. Bubbles forming
indicate a gas leak.
Never use an open fl ame to check for leaks.
Correct any leak detected immediately.
• The pressure test tapping locations are shown
in the
fi
gure below. A built-in non-adjustable
regulator controls the burner manifold pressure.
The correct pressure range is shown in the table
in
Specifi cations
section of this manual on page
8. The pressure check should be made with the
burner alight and at its highest setting. See
Lighting
Instructions
section on page 35 for full operating
details.
INSTALLATION
