Desa LDL3924NR Owner's Operation And Installation Manual page 14

INSTALLATION
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 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 re-
quirements 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.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
External Regulator
Figure 15 - External Regulator With Vent
Pointing Down
Available from Allparts Equipment and Accessories - 1-877-475-5660 - www.allpartsinc.com
Continued
Propane/LP
Supply Tank
Vent
Pointing
Down
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.
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
gas control. Hold gas fitting with
wrench when connecting it to
gas piping and/or fittings.
Gas Control
Approved Flexible
Gas Hose (if allowed
by local codes)
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Pipe
Nipple
Sediment Trap
Figure 16 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 31.
** Minimum inlet pressure for purpose of input
adjustment.
Propane/
LP- From
External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
3" Min.
Natural-
From Gas
Cap Tee
Meter (5"
Joint
W.C.** to
10.5" W.C.
Pressure)