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WARNING: For natural gas
units, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certified equipment
shutoff valve from your dealer.
For propane/LP gas, installer must supply
an external regulator. 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 dam-
age could occur. Install external regulator with
vent pointing down as shown in Figure 12.
Pointing 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 13).
120890-01D
INSTALLATION
Continued
IMPORTANT: Install equipment shutoff valve
in an accessible location. Main gas valve is for
turning on or shutting off gas to appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to fireplaces.
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.
sealant that is resistant to liquid
petroleum (LP) gas.
Propane/LP
Supply Tank
Figure 12 - External Regulator With Vent
Natural
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
* Purchase optional CSA design-certified
equipment shutoff valve from your dealer.
** Min. inlet pressure for purpose of input
adjustment.
www.desatech.com
WARNING: Use pipe joint
Pointing Down
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Min.
Tee Cap Pipe
Joint
Nipple
Sediment Trap
Figure 13 - Gas Connection
External
Regulator
Vent
Pointing
Down
Gas
Regulator
Approved
Flexible
Gas Hose (if
allowed by
local codes)
13
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