Desa BDV34NA EN - Manual (Page 18)

18 105453
DIRECT-VENT FIREPLACE (NATURAL/PROPANE)
®
Figure 35 - Gas Connection
* The A.G.A. design-certified manual shutoff valve may be supplied with the appliance
or you can purchase it from your dealer.
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
pressure will occur.
Installation must include a manual 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 35).
For propane connections only, the installer
must supply an external regulator. The ex-
ternal 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 34.
Pointing the vent down protects it from
freezing rain or sleet.
FIREPLACE
INSTALLATION
Continued
INSTALLING GAS PIPING TO
FIREPLACE LOCATION
Installation Items Needed
Before installing fireplace, make sure you
have the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• approved flexible gas line with gas con-
nector (if allowed by local codes) (not
provided)
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the A.G.A. design-certified manual
shutoff valve from your dealer.
NOTICE: A qualified service per-
son must connect fireplace to
gas supply. Follow all local codes.
CAUTION: For propane units,
never connect heater directly to
the propane supply. This heater
requires an external regulator (not
supplied). Install the external
regulator between the heater and
propane supply.
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Figure 34 - External Regulator with Vent
Pointing Down (Propane Only)
Propane
Supply
Tank
External
Regulator
Vent
Pointing
Down
Install sediment trap/drip leg in supply line
as shown in Figure 35. Locate sediment
trap/drip leg where it is within reach for
cleaning. Locate sediment trap/drip leg
where trapped matter is not likely to freeze.
A sediment trap traps moisture and con-
taminants. This keeps them from going into
fireplace gas controls. If sediment trap/drip
leg is not installed or is installed wrong,
fireplace may not run properly.
A.G.A. Design-Certified
Manual Shutoff Valve with
1/8" NPT Tap*
3" Minimum
LP - From External
Regulator (11" W.C. to
14" W.C. Pressure)
Approved Flexible
Gas Line
Cap Pipe Nipple Tee Joint
Sediment Trap/Drip Leg
Natural - From Gas
Meter (5" W.C. to 10.5"
W.C. Pressure )
Check your building codes for any special
requirements for locating manual shutoff
valve to fireplaces.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged fireplace valves.