Van Air Systems MDV400 Level Switch-Alarm - Manual (Page 3)

PRINTED IN THE USA © VAN AIR SYSTEMS INC. 2950 MECHANIC STREET, LAKE CITY, PA 16423 PAGE 3
3.0 ADJUSTING THE TIMER
3.1
The time between drain periods and drain periods are adjusted by a dipswitch keyboard located on the circuit
board inside the cover. Remove power from the unit and then unscrew the (4) screws holding the cover in
place. Take caution not to stress the wire harness connecting the bottom board to the top board.
3.2 Adjust per the chart in Figure 4. Note: The timer settings cannot be changed unless power is removed from
the unit.
3.3 Reassemble cover making sure that the cover o-ring seal is properly seated and the wire harness is not
positioned near the motor.
3.4 Apply power to the unit and push the TEST button to clear the previous setting.
FIGURE 4
FIGURE 3 ASSEMBLY OF ACTUATOR AND VALVE (2” AND LARGER)
CAUTION
POWER MUST BE REMOVED FROM
UNIT WHEN CHANGING SETTINGS.
TEST BUTTON MUST BE USED ONCE
AFTER POWER IS RESTORED TO
INITIALIZE NEW SETTINGS.