Allen + Roth ARSTDF26I Manual page 18

CONNECTING TO A GAS SUPPLY
WARNING
WARNING
CAUTION
must be installed. Your gas supplier provides the external regulator for natural gas.
The installer must supply an external regulator for liquid propane. For natural gas, the gas supplier supplies
the external regulator. The external regulator reduces incoming gas pressure, and the pressure must be
reduced to between 11" and 14" of water column for propane and between 5" and 10.5" of water column
for natural gas. Heater regulator damage could occur if the pressure of the incoming gas is not reduced.
Install the external regulator with the vent pointing down as shown in Fig. 14. The purpose of pointing the
vent down is to protect it from freezing rain or sleet.
Fig. 14—Regulator Conversion
External
Regulator
with Vent
Pointing
Down
*The equipment shutoff valve can be purchased from your local home center store.
CAUTION
to allow proper volume gas to heater. If the pipe is too small, loss of pressure will occur. Installation must
include an equipment shutoff valve, union, and plugged 1/8" NPT tap. The NPT tap must be located
within reach for the test gauge hook up and be upstream from heater (see Fig. 15).
IMPORTANT: Install equipment shutoff valve in an accessible location. The equipment shutoff valve is for
turning on or shutting off the gas o the heater. Apply pipe joint sealant lightly to the male threads. This
prevents excess sealant from going into the pipe. The heater valves may become clogged if excess
sealant gets into the pipes.
Installation (cont.)
A qualified service technician must connect heater to gas supply. Follow all local codes.
Never connect the heater to private/non-utility gas wells (commonly known as
wellhead gas).
Never connect the heater directly to the gas supply. This heater requires an external
regulator (not supplied). The external regulator between the gas supply and heater
Propane/
LP Supply
Tank
Use only new black iron or steel pipe. Internally tinned copper tubing may be used
in certain areas, depending on your local codes. Use pipe of 1/2" diameter or greater
Fig. 15—Gas Connection
Equipment Shutoff Valve With
1/8" NPT Tap*
Approved
Flexible
Gas Line
or 1/2"
Black Pipe
3" Minimum
Pipe Nipple Cap Tee Joint
Sediment Trap
18 Vent-Free Gas Stove User's Manual
Propane/LP
From External
Regulator (11"
W.C. to 14" W.C.
Pressure)
Natural
From Gas Meter
(5" W.C. to
10.5" W.C. Pressure)