Connecting To Gas Supply - Desa CDCFTN Owner's Operation And Installation Manual

INSTALLATION
14

Connecting to Gas Supply

INSTALLATION
Continued
CONNECTING TO GAS SUPPLY
WARNING: This appliance requires a 45° male flare
fitting 5/8"-18 UNF (Unified National Fine Thread) inlet
connection and the flexible gas line provided.
WARNING: A qualified service person must con-
nect fireplace to gas supply. Follow all local codes.
WARNING: Never connect natural gas fireplace to
private (non-utility) gas wells. This gas is commonly
known as wellhead gas.
IMPORTANT : For natural gas, check gas line pressure before
connecting fireplace to gas line. Gas line pressure must be no greater
than 14 inches of water. If gas line pressure is higher, heater regulator
damage could occur.
CAUTION: Never connect propane/LP fireplace
directly to the propane/LP supply. This fireplace
requires an external regulator (not supplied). Install
the external regulator between the fireplace and pro-
pane/LP supply.
For propane/LP units, the installer must supply an external regula-
tor. 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, fireplace
regulator damage could occur. Install external regulator with the
vent pointing down as shown in Figure 19. 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" or
greater diameter 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 heater (see Figures 20).
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.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
Propane/LP
Supply Tank
Vent Pointing Down
Figure 19 - External Regulator With Vent Pointing Down
Approved Flexible
Gas Line
3"
Minimum
Pipe Nipple Cap Tee Joint
Sediment Trap
Figure 20 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, pages 38 and 39.
External Regulator
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
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)
111244-01A