MAXITROL MR610-3/4 Control Valve Components Adjusting the Pressure Regulator User Guide
- June 15, 2024
- MAXITROL
Table of Contents
Control Valve Components
Adjusting the Pressure Regulator
(for Vented Units Only)
MR610-3/4 Control Valve Components Adjusting the Pressure Regulator
Convertible regulators are designed to deliver either of two fixed
outlet pressures for Natural Gas (NG) or LP Gas. To change from one gas to the
other, turn the conversion plug counter clockwise and remove it from the
valve. Unsnap and remove the plastic part of the conversion plug, rotate it
180°, and then slide it back onto the conversion plug until it snaps. Insert
the conversion plug into the valve and turn it clockwise until it bottoms out.

NOTE: The default setting of the pilot adjustment screw is preset to the
maximum.
Therefore, it is only possible to decrease the pilot. WARNING: The pressure test ports use a captured screw. It will
not fall out but it must be retightened after checking both inlet and manifold
pressure.
IMPORTANT! Check pressure test ports for leaks after test is
complete. Fuel Conversion: This minimum rate screw should be
changed when converting from one fuel to another. Unless the appliance
manufacturer does not recommend the change. Always follow the OEM’s
instructions.
Installation:
- Tighten brass part of interrupter block into valve. Hand tight plus turn.
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