Desa CGEFP33PRA Owner's Operation And Installation Manual page 16

INSTALLATION
16
Installing Gas Piping to Fireplace Location (Cont.)
Connecting Fireplace To Gas Supply
INSTALLATION
Continued
Installation Items Needed
Before installing fireplace, make sure you have the items listed below.
• external regulator (supplied by installer, for propane/LP units only)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• approved flexible gas line with gas connector (if allowed by lo-
cal codes) (not provided)
* A CSA design-certified equipment shutoff valve with 1/8" NPT
tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 42.
For propane/LP connections only, 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 pressure,
heater regulator damage could occur. Install external regulator with
the vent pointing down as shown in Figure 24. Pointing the vent
down protects it from freezing rain or sleet.
CAUTION: Use only new, black iron or steel pipe.
Internally-tinned copper tubing may be used in cer-
tain 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 24).
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 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 fireplace valves. Never use sealant on flare threads.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
We recommend that you install a sediment trap in supply line as
shown in Figure 25. 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.
External
Regulator
Vent
Pointing
Down
Figure 24 - External Regulator with Vent Pointing Down
3" Minimum
Pipe Cap
Nipple
Sediment Trap
Figure 25 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, pages 42 and 43.
Propane/LP
Supply Tank
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Natural
From Gas Meter
(5" W.C. to 10.5"
W.C. Pressure)
Propane/LP
From External
Tee
Regulator (11" W.C.
Joint
to 14 " W.C.
Pressure
110149-01A