Desa CDCFPRA Operation And Installation Manual page 16

iNsTallaTioN
Continued
CONNECTING TO GAS SUPPLY
WARNING: This appliance re-
quires 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 connect fireplace to
gas supply. Follow all local codes.
WARNING: Never connect natu-
ral gas fireplace to private (non-util-
ity) 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" of
water. If gas line pressure is higher, heater regula-
tor damage could occur.
CAUTION: Never connect pro-
pane/LP fireplace directly to the
propane/LP supply. This fireplace
requires an external regulator
(not supplied). Install the external
regulator between the fireplace
and propane/LP supply.
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 pressure, fireplace 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" or greater diameter to allow
proper gas volume to fireplace.
If pipe is too small, undue loss
of volume will occur.
16
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 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.
sealant that is resistant to liquid
petroleum (LP) gas.
Propane/LP
Supply
Tank
Figure 21 - External Regulator With Vent
Approved
Flexible
Gas Line
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 38.
www.desatech.com
WARNING: Use pipe joint
Pointing Down
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Minimum
Pipe Nipple Cap Tee Joint
Sediment Trap
Figure 22 - Gas Connection
External
Regulator
Vent
Pointing
Down
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)
116658-01D