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Marquis 38 24
• Remove the bottom grill.
• The pressure test taps are located on front of the valve.
• The supply pressure is marked ‘IN’ and the manifold pressure is marked ‘OUT’. There is
also an arrow marking the direction of gas flow.
• Loosen the screw inside the tap with a 1/8” wide flat screw driver.
• Connect a 1/4” rubber tube to the tap and a pressure gauge.
• Be sure to tighten the screw inside the tap after you are finished taking pressure
readings.
CHECKING INLET AND OUTLET GAS PRESSURE
SERVICING Cont...
• Remove the glass door, log set and the burner.
• Use a 5/8” wrench to loosen the compression fitting to the cap orifice.
• Use two 1/2” wrenches to loosen and remove the cap orifice.
• Change the orifice.
• Replace the compression fitting.
• Replace the burner and the log set.
• Test fire the appliance with the glass door off and check for gas leaks.
• Replace the glass door.
CHANGING MAIN BURNER ORIFICE
CHECKING AND ADJUSTING PILOT
The pilot flame should have the characteristic as shown in the illustration below. The flame
should not have yellow tips but should engulf the thermocouple and thermopile. It can be adjusted
be turning the screw marked “pilot” on the control valve.
REFERENCE ONLY