Monessen Hearth DBX24C* User Manual

Page of 44
33D4047 
21 
W
ARNING
Test Port “A”
CHECKING GAS PRESSURE
Test all gas joints from the gas meter to the heater valve for leaks 
using a gas analyzer or soap and water solution after completing 
connection. DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning and the control 
set to HIGH.
Open control access door at bottom front of unit to find valve and 
regulator referred to below.
MANUAL CONTROL 
(Figure 28)
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 side of regulator 
body. Install fitting and tubing to pressure gauge. After 
taking pressure reading, reinstall test plug. Check for 
gas leaks.
MILLIVOLT CONTROL 
(Figure 30)
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 “A” 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.
Figure 28 - Pressure Test Point Location
Figure 30 - Pressure Test Point Location
NPT Test Plug
W
A
RNING
Connecting directly to an 
unregulated propane/LPG tank 
can cause an explosion.
Test
Points
THERMOSTAT CONTROL
 (Figure 29)
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 
taking pressure reading, be sure and turn captured 
screw clockwise firmly to reseal. Do not over torque. 
Check for gas leaks.
Figure 29 - Alternate Test Point Location for Thermostat 
Control Unit