Monessen Hearth TPB18 - Manual (Page 20)

20 70D0004
CHECkING GAS PRESSURE
The heater gas inlet connection is a 3 /
8
" NPT at the valve. On
all control type units, the inlet connection is on the right side of
unit. To connect from the opposite side, route the pipe around
the back portion of the unit.
When tightening up the joint to the valve, hold the valve
securely to prevent movement.
MILLI-VOLT VALVE CONTROL (Figure 16)
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 control
knob). After taking pressure reading, be sure and
turn captured screw clockwise firmly to re-seal. Do
not over torque. Check for gas leaks.
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.
W
ARNING
Connecting directly to an
unregulated propane/LPG tank
can cause an explosion.
Figure 16 - Pressure Test Point Location
Milli-Volt Control
Test Port “OUT”