Hoffman Media EDD-4C 사용자 설명서

Manual oil flow switch

Drip verification peephole

Oil inlet

Oil outlet

Internal solenoid

Figure 7: Dripmaster EDD-4C Needle Valve Assembly

The internal solenoid is powered by the Dripmaster power source. When powered up, the solenoid
allows oil flow. When powered down, the solenoid blocks oil flow.

To allow oil flow when the Dripmaster is not powered on, turn the manual oil flow switch to the right
90 degrees.

Resetting the Dripmaster

There are two ways to reset the Dripmaster:

1. By disconnecting the power source to the Dripmaster for 10 seconds, and then reconnecting it.

2. By removing the Dripmaster cover, and raising the Control Mode toggle switch to the MAN

position, and then back to the AUTO position.

In both cases, the circuit voltage is interrupted and then restored.

Note:

In case (2) above, a random drip rate is displayed initially which can be ignored.