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GAS LINE INSTALLATION
CHECK 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�
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�
MILLIVOLT VALVE CONTROL
Figure 14
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 clock-
wise firmly to re-seal. Do not over torque. Check for gas
leaks�
Monessen • MJ27NR-S/MJ27PR-S Owner's Manual • 20308677 • Rev B • 01/17
12
"MOJO" Series Unvented Gas Log Sets
Figure 13. Pressure Test Point Location
Millivolt Control
FP2008
gas valve
Test Port "OUT"
FP2008
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