Hoffman Media EDD-4C manual Manual Control, Pre-lube pump off Mode

35 dpm toggle switch setting

20 25 30 35 40

1 2 4 8 10

40 dpm toggle switch setting

20 25 30 35 40

1 2 4 8 10

The OPEN and CLOSE LEDs indicate whether the needle valve is opening or closing. See items 5 and 11 in Figure 6 on page 13.

Pre-lube (pump off) Mode

To select the Pre-lube mode, 24 V AC/DC must be applied to the S.B. terminals in the connection box (Figure 5). In this mode, the drip rate is automatically set to 2 dpm.

Manual Control

This mode permits emergency operation in the rare case when there is a suspected failure of the main circuitry.

Select the manual mode by switching the Mode toggle switch to the upper MAN position (Figure 6). This mode bypasses the electronic control circuitry, and allows the operator to modify the drip rate by using the Open Valve (manual) and Close Valve (manual) push buttons.

Use the Drip verification peephole (see Figure 7 below) to check the drip rate.

In this mode, power is removed from the circuitry, except for the push buttons, motor, and Manual mode LED.

17