Checking Gas Pressure - Monessen Hearth DLX18 Installation And Operating Instructions Manual

CHECKING GAS PRESSURE

Connecting directly to
an unregulated propane/
LPG tank can cause an
explosion.
Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after com-
pleting connection. DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning and the control set to HIGH.
MANUAL CONTROL (Figure 16)
The pressure regulator is preset and locked to dis-
courage tampering. If the pressure is not as specified,
replace the regulator with the correct part from the parts
list in this manual.
Remove 1/8" NPT plug, located on either side of regu-
lator body. Install fitting and tubing to pressure gauge.
After taking pressure reading, reinstall test plug. Check
for gas leaks.
THERMOSTAT CONTROL (Figure 17)
Turn captured screw counter clockwise two or three
turns and then place tubing to pressure gauge over test
point (Use test point closest to control knob). After tak-
ing pressure reading, be sure and turn captured screw
clockwise firmly to reseal. Do not over torque. Check
for gas leaks.
MILLIVOLT CONTROL (Figure 18)
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Turn captured screw counter clockwise two or three
turns and then place tubing to pressure gauge over test
point. (Use test point "OUT" closest to gas inlet). After
taking pressure reading, be sure and turn captured screw
clockwise firmly to reseal. Do not over torque. Check
for gas leaks.
20
The heater gas inlet connection is a
the opposite side, route the pipe under the rear portion of the unit.
When tightening up the joint to the valve, hold the valve securely to prevent
movement.
NPT Test Plug
Figure 16 - Pressure Test Point Location
Figure 17 - Alternate Test Point Location for Thermostat
Test Port "OUT"
Figure 18 - Pressure Test Point Location
3
/ " NPT at the valve. To connect from
8
Control Unit
Test
Points
14D9999