www.desatech.com
111417-01B
10
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 inches
of water. If you do not reduce incoming gas pres-
sure, heater regulator damage could occur. Install
external regulator with the vent pointing down as
shown in Figure 6. Pointing the vent down protects
it from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-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.
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 7).
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.
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.
INSTALLATION
Continued
Figure 6 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
Figure 5 - Gas Regulator Location and
Gas Line Access Into Stove Cabinet
6"
Minimum
48"
Minimum
Ceiling
Floor
Back Wall
Front of
Stove
Unit
Gas Regulator
Inlet Connection
Back View
Side View
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install a sediment trap in
supply line as shown in Figure 7. 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: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or fittings.
Tee Pipe Cap
Joint Nipple
3"
Min.
Sediment Trap
Gas
Regulator
of Heater
Natural Gas
From Gas Meter (5" W.C.**
to 10.5" W.C. Pressure)
Propane/LP
From External Regulator
(11" W.C.**
to 14" W.C.
Pressure)
CSA Design-
Certified
Equipment
Shutoff Valve
With 1/8"
NPT Tap*
Approved
Flexible
Gas Hose (if
allowed by
local codes)
Figure 7 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories
, page 30.
** Minimum inlet pressure for purpose of input
adjustment.
