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INSTALLATION
Continued
For propane/LP units, the installer must supply an
external regulator. The external regulator will re-
duce incoming gas pressure. You must reduce in-
coming 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 15. Pointing the vent down pro-
tects 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 16).
IMPORTANT: Install equipment valve in an acces-
sible location. The equipment shutoff valve is for
turning on or shutting off the gas to the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from go-
ing into pipe. Excess sealant in pipe could result
in clogged heater valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Propane/LP
Supply Tank
Vent
Pointing
Down
Figure 15 - External Regulator With Vent
Pointing Down
14
We recommend that you install a sediment trap in
supply line as shown in Figure 16. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and heater. Lo-
cate sediment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture and con-
taminants. This keeps them from going into heater
controls. If sediment trap is not installed or is in-
stalled wrong, heater may not run properly.
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or fittings.
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)
Tee
Joint Nipple
Sediment Trap
* Purchase the optional CSA design-certified equip-
ment shutoff valve from your dealer. See Accesso-
ries, page 43.
** Minimum inlet pressure for purpose of input
adjustment.
CHECKING GAS CONNECTIONS
ing and connections, internal
External
and external to unit, for leaks
Regulator
after installing or servicing. Cor-
rect all leaks at once.
flame to check for a leak. Apply a
noncorrosive leak detection fluid
to all joints. Bubbles forming show
a leak. Correct all leaks at once.
www.desatech.com
CAUTION: Avoid damage to
3" Minimum
Approved Flexible
Pipe Cap
Gas Hose (if allowed
by local codes)
Figure 16 - Gas Connection
WARNING: Test all gas pip-
WARNING: Never use an open
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Gas
Regulator
111160-01C
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