53D0419
31
FP1979
Millivolt gas valve
FP1979
ChECKING 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 fireplace,
STOP!
Do not install the appliance. Contact your dealer
immediately.
2. To ease installation, a 30" (762 mm) flex line with
manual shut-off valve has been provided with 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 fireplace for leaks. Use a solution of
50/50 water and soap 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.
Figure 40.
After taking pressure
reading, be sure and turn captured screw clockwise
firmly to reseal. Do not over torque. Check test
points for gas leaks.
Figure 40 -
Gas Pressure Check at Gas Valve
Pressure Test
“IN”
Pressure Test
“OUT”
HI/LO Knob
Pilot Adjustment Screw
W
ARNING
Do not use open flame to
check for gas leaks.