Desa FPVF33PRA - Manual (Page 14)

www.desatech.com 113109-01C 14
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 22. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and fireplace.
Locate sediment trap where trapped matter is not
likely to freeze. A sediment trap traps moisture
and contaminants. This keeps them from going
into fireplace gas controls. If sediment trap is not
installed or is installed wrong, fireplace may not
run properly.
INSTALLATION
Continued
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 pres-
sure, heater regulator damage could occur. Install
external regulator with the vent pointing down
as shown in Figure 21. 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 fireplace.
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 fireplace (see Figure 22).
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 fireplace valves. Never use sealant on
flare threads.
Figure 21 - External Regulator on
Propane/LP Supply Tank with Vent
Pointing Down
External
Regulator
Vent
Pointing
Down
Propane/LP
Supply Tank
Figure 22 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 38.
** Minimum inlet pressure for purpose of input
adjustment.
Sediment Trap
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Minimum
Cap Pipe Tee
Nipple Joint
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)
CONNECTING FIREpLACE TO GAS
SUppLY
Installation Items Needed
• 5/16" hex socket wrench or nut-driver
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not pro-
vided)
1. Remove fireplace screen. Remove two screws
that hold fireplace screen in place for shipping.
These screws are located near top of screen.
Discard screws. Lift fireplace screen up and
pull out to remove.