Desa AND VM42 Owner's Operation And Installation Manual page 13

INSTALLATION
Continued
DESA recommends that a black iron gas line be routed from the
gas source, through a sediment trap (shown in Figure 20), and into
the appliance, Once connected through the appliance, a flexible
gas line may be used for ease of installation to gas control valve
(see Figure 21).
Before connecting the black iron gas line to the inside of the appliance
a sediment trap must be included outside the appliance between the gas
line and the gas shutoff valve. It must extend down three (3) inches
beyond the center of the pipe. Prepare incoming black iron gas line with
teflon tape or pipe joint compound (Check with local building codes).
CAUTION: Compounds used on threaded joints of
gas piping shall be resistant to the action of Liquefied
Petroleum (LP or propane), and should be applied lightly
to ensure excess sealant does not enter the gas line.
WARNING: All gas piping and connections must
be tested for leaks after the installation is completed.
After ensuring that the gas valve is on, apply a commer-
cial leak detection solution to all connections and joints.
If bubbles appear, leaks can be detected and corrected.
Do not use an open flame for leak testing and do not
operate any appliance if a leak is detected.
Complete your gas installation by connecting incoming gas line
with flexible gas line. Secure tightly with wrench but DO NOT
OVERTIGHTEN.
Sediment Trap
(Not Supplied)
3" Min.
(76mm)
Figure 20 - Sediment Trap
Flexible Gas Line
Gas Shutoff
Do NOT Kink
Valve
Note:
1) Wire Connections
1/2" NPT
Not Shown for Clarity
Incoming
2) * 1/8" NPT Plugged
Gas Line
Tapping
Figure 21 - Connecting Flexible Gas Line to Millivolt Valve
108795-01K
Incoming 1/2" Gas Line
Permitted by Local Codes
Red Surface Indicates For
Propane/LP Use Only
Pilot Adj
ON
OFF
IN OUT
Outlet
Pressure
Inlet Pressure
Tap
Tap
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Gas Line Hook-Up (Cont.)
Ember and Pan Material Placement
EMBER AND PAN MATERIAL PLACEMENT
1. Open the bag(s) of vermiculite and fill the entire burner pan
until the burner tube is completely covered (see Figure 22).
2. Smooth the pan material just even with edges of the burner pan.
3. Remove the ember material from the bag and flatten small
amounts into quarter size pieces and lay on top of the surface
of the pan material (see Figure 23).
4. Place just enough to cover the entire surface and leave about a
1/2 inch gap under the lower grate members to allow air to
flow (see Figure 24).
Vermiculite
Grate
(Pan Material)
Figure 22 - Fill Entire Burner Pan with Vermiculite
Ember
Material
Grate
Figure 23 - Ember Material on Surface of Pan Material
(Vermiculite)
0.5"
Burner Pan
Figure 24 - Pan and Ember Material Clearances
INSTALLATION
Burner Pan
Vermiculite
Burner Pan
(Pan Material)
Pan and Ember
Grate
Material
0.5"
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