22
22
Gas Supply Installation
• The gas supply pipe should enter the appliance case through the opening
at the left side. The supply pipe should be connected to the appliance
gas inlet pipe situated at the left side of the control valve. Supply line
connection to the inlet pipe is 3/8 inch NPT ( female).
If the circulating fan is to be installed, be aware that the supply pipe
run inside the case should be at the same height as the appliance
inlet pipe in order to clear the fan. If intending to fi t an internal
isolating valve, check that it will be clear of the fan.
• 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 propane 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
to allow the appliance to be disconnected for servicing.
• A plugged 1/8 inch NPT tapping must be installed in the line. The tapping must be accessible for test gauge
connection and be immediately upstream of the gas supply connection to the appliance.
• 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 (3.5kPa).
»
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 (3.5kPa).
»
Failure to either disconnect or isolate the appliance during pressure testing may result in regulator or valve
damage. Consult your dealer in this case.
• The minimum supply pressure is given in the
Speci
fi
cations
section of this manual.
• 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 on the right. A
built-in non-adjustable regulator controls the burner manifold
pressure. The correct pressure range is shown in the table in
Speci
fi
cations
section of this manual. The pressure check should
be made with the burner alight and at its highest setting. See
Lighting Instructions
section for full operating details.
Supply
pressure
test tapping
Manifold
pressure
test tapping
Pressure test tappings
X
X
