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FIREPLACE INSTALLATION
Check your building codes for any special requirements for
locating equipment shutoff valve to fi replaces.
Apply pipe joint sealant lightly to male threads. This will
prevent excess sealant from going into pipe. Excess seal-
ant in pipe could result in clogged burner system valves
We recommend that you install a sediment trap/drip leg in
supply line as shown in Figure 46. Locate sediment trap/
drip leg where it is within reach for cleaning. Install in piping
system between fuel supply and burner system. Locate
sediment trap/drip leg where trapped matter is not likely
to freeze. A sediment trap collects moisture and contami-
nants and keeps them from going into the burner system
gas controls. If sediment trap/drip leg is not installed or is
installed wrong, burner system may not run properly.
A manual shutoff valve must be installed
upstream of the appliance. Union tee
and plugged 1/8" NPT pressure tapping
point should be installed upstream of the
appliance. Figure 46
Use pipe joint sealant that is resistant to
liquid petroleum (LP) gas.
Natural Gas
From Gas Meter
(4.5" w.c. to 10.5" w.c. Pressure)
Propane/LP
From External Regulator
(11" w.c. to 13" w.c. Pressure)
Approved Flexible
Gas Line
Sediment Trap/
Pipe Nipple
Drip Leg
Figure 46 -
Gas Connection
20306748
CSA Design-Certifi ed
Equipment Shutoff Valve
with 1/8" NPT Tap*
Tee Joint
3 "
M i
Cap
n i m
CHECK GAS PRESSURE
1. Check gas type. The gas supply must be the same as
stated on the appliance's rating decal. If the gas supply
is different from the fi replace, STOP! Do not install the
appliance. Contact your dealer immediately.
2. To ease installation, a 24" (610 mm) fl ex line with manual
shut-off valve has been provided with on this appliance.
Install and attach 1/2" gas line onto shut-off valve.
3. After completing gas line connection, purge air from
gas line and test all gas joints from the gas meter to the
fi replace for leaks. Use a solution of 50/50 water and
soap solution or a gas sniffer.
4. To adjust fl ame height, turn HI/LO knob to HI to get
maximum pressure to burner. Turn HI/LO knob to LO
to get minimum pressure.
5. To check gas pressures at valve, turn captured screw
counter clockwise 2 or 3 turns and then place tubing
to pressure gauge over test point. Turn unit to high.
Figure 47 After taking pressure reading, be sure and
turn captured screw clockwise fi rmly to reseal. Do not
over torque. Check test points for gas leaks.
Pressure
Test "IN"
Pressure
Test "OUT"
HI/LO Knob
Pilot Adjustment Screw
Figure 47 -
Gas Pressure Check at Gas Valve
Do not use open fl ame to check for
u m
gas leaks.
MLDV Series Gas Fireplace
27
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