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OPTIONAL OUTSIDE COMBUSTION AIR SUPPLY INSTALLATION
A 4" (100 mm) dia. aluminum flex pipe or equivalent may
be installed from the outside (with a proper exterior
cover) to the Zero Clearance cabinet. There is an outside
hole provided on the rear wall of the kit. This will provide
adequate outside combustion air supply to the heater.
An authorized service person should install the gas line in accordance with all local building codes. If codes permit,
flex gas line or coiled copper tubing may be used as gas supply line. The suggested way to install the gas supply
line is as follows: run 1/2" (9.5 mm) NPT gas line to the left side of the framed opening. (See U20/E21 installation
instructions for additional information).
Specifications
Natural Gas
4.5" w.c.
1.12 kP
Propane
11" w.c.
2.74 kPa
ELECTRICAL SUPPLY
Provide 120 VAC, 60 Hz (in Australia and New Zealand: 240 VAC,
50 Hz) receptacle within 24"(610mm) of the left side of the appliance
(not inside the Zero Clearance Cabinet). Plug the cord on the
appliance into the receptacle.
U20/E21 Gas Insert Zero Clearance Kit
GAS SUPPLY LINE
Min. Inlet
Input
Gas Pressure
Rating
21,000 Btu/hr
22 mj/h
21,000 Btu/hr
22 mj/h
INSTALLATION
9
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