20306748
27
MLDV Series Gas Fireplace
FIREPLACE INSTALLATION
Figure 46 -
Gas Connection
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)
3" Minimum
Cap
Approved Flexible
Gas Line
CSA Design-Certi
fi
ed
Equipment Shutoff Valve
with 1/8" NPT Tap*
Sediment Trap/
Drip Leg
Tee Joint
Pipe Nipple
CAUTION
Use pipe joint sealant that is resistant to
liquid petroleum (LP) gas.
CAUTION
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
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.
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.
Figure 47 -
Gas Pressure Check at Gas Valve
Pressure
Test “IN”
Pressure
Test “OUT”
HI/LO Knob
Pilot Adjustment Screw
W
ARNING
Do not use open
fl
ame to check for
gas leaks.