Mastic Spark Modern Fires 91P - Manual (Page 27)

26 L100001 27
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 a
shutoff 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
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
counterclockwise 2 or 3 turns and then place tubing
to pressure gauge over test point. Turn unit to high. See
Figure 34. 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 34 - Gas Pressure Check at Gas Valve
Pressure Test
“IN”
Pressure Test
“OUT”
HI/LO
Knob
Pilot Adjustment
Screw
Do not use open flame to check for gas leaks.
WARNING
FAN ASSEMBLY DIAGRAMS
Speed Control Control Shaft
Locknut
Control
Knob
Switch
Bracket
Blower
Plug-In
Duplex Outlet
(Located underneath firebox floor against
lower right outside wall, as shown on page 5)
Blower Location Side View