Monessen Hearth Direct Vent Gas Insert IDV490NVC - Manual (Page 19)

57D0016 19
CHECKING GAS PRESSURE
1. Check gas type. The gas supply must be the same as
stated on the applianceʼs rating decal. If the gas supply
is different from the fireplace, STOP! Do not install
the appliance. Contact your dealer immediately.
2. Install and attach 30" (762mm) flex line provided with
on this appliance to 1 /
2
" gas line.
3. After completing gas line connection, purge air from
gas line and test all gas joints from the gas meter to
the fireplace for leaks. Use a soap and water solution
or a gas sniffer.
4. To adjust flame 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. See
Figure 16. After taking pressure reading, be sure and
turn captured screw clockwise firmly to reseal. Do not
over torque. Check test points for gas leaks with a soap
and water solution or an electronic gas leak detector.
Do not use open flame to check for
gas leaks.
W
ARNING
Figure 16 - Gas Pressure Check at Gas Valve
Pressure
Test “IN”
Pressure
Test “OUT”
HI/LO
Knob
Pilot Adjustment
Screw