User Guide

Valve Adjustments

NOTE: Low re adjustment should be checked whenever the high re

adjustment is changed.

MR212 Valve

High Fire Adjustment:

1 Short the sensor connection at the amplier. This drives the valve to

continuous high re condition.

2 Remove seal cap (A, Figure 1), and turn regulator pressure adjusting

screw to obtain desired manifold pressure. (Clockwise rotation

increases pressure.)

3 Remove the short to the amplier sensor connection.

NOTE: If low re bypass is on maximum, the desired high re outlet pressure

may not be achieved.

Low Fire Adjustment:

1 Remove a sensor wire from amplier terminal. This drives the valve

to a continuous low re condition.

2 Remove cap (B, Figure 1), and loosen lock screw (C, Figure 1).

Turn (D, Figure 1) to desired low re adjustment. (Clockwise rotation

reduces minimum ow rate.)

3 Tighten set screw (C, Figure 1), replace cap (B, Figure 1) and

reconnect sensor wire to amplier.

Figure 1.