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Astria.us.com
900704-00E
14
For propane/LP units, the installer must supply an
external regulator. The external regulator will reduce
incoming gas pressure. You must reduce incoming
gas pressure to between 11" and 14" of water. If
you do not reduce incoming gas pressure, heater
regulator damage could occur. Install external
regulator with the vent pointing down as shown in
Figure 12
. Pointing the vent down protects it from
freezing rain or sleet.
Figure 12 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank
External
Regulator
with Vent
Pointing
Down
INSTALLATION
Continued
Installation must include an equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate NPT
tap within reach for test gauge hook up. NPT tap
must be upstream from heater
(see
Figure 13
).
IMPORTANT
:
Install equipment shutoff valve in
an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special require-
ments for locating equipment shutoff valve to
fi replaces.
Apply pipe joint sealant lightly to male NPT threads.
This will prevent excess sealant from going into
pipe. Excess sealant in pipe could result in clogged
heater valves.
Figure 13 - Gas Connection
Tee
Cap
Pipe
Joint
Nipple
3" Minimum
Gas
Regulator
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)
Approved Flexible
Gas Hose (if
allowed by local
codes)
Sediment Trap
WARNING: Use pipe joint sealant
that is resistant to liquid petroleum
(LP) gas.
CAUTION: Avoid damage to gas
control. Hold gas control with wrench
when connecting it to gas piping and/
or fi ttings.
We recommend that you install a sediment trap in
supply line as shown in
Figure 13
. Locate sediment
trap where it is within reach for cleaning. Install
in piping system between fuel supply and heater.
Locate sediment trap where trapped matter is not
likely to freeze. A sediment trap traps moisture and
contaminants. This keeps them from going into
heater controls. If sediment trap is not installed
or is installed wrong, heater may not run properly.
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in certain
areas. Check your local codes. Use
pipe of 1/2" diameter or greater to
allow proper gas volume to heater.
If pipe is too small, undue loss of
volume will occur.
** Minimum inlet pressure for purpose
of input adjustment.