User Guide

Valve Adjustments

M411, 511, 611 Valve

High Fire Adjustment:

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

a continuous high re condition.

2 Adjust the pressure regulator to obtain the desired manifold pressure

(7˝ w.c. maximum).

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

Low Fire Adjustment:

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

to a continuous low re condition.

2 Remove bypass seal cap (A, Figure 2), and turn adjusting screw (B,

Figure 2) to desired low re adjustment. (Clockwise rotation reduces

minimum ow rate.)

3 Replace cap (A, Figure 2), and reconnect sensor wire to amplier.

NOTE: See Bulletin M.MR_MT_EN for additional M/MR valve information.

Figure 2.