Caution – Van Air Systems Sentinel MDV-400I Series Drain Valves User Manual
Page 3
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 (1-1/2” 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.
ACTUATOR
VALVE STEM
BALL VALVE
STEM ADAPTER
(1) NEEDED FOR 1-1/2” AND 2” VALVE.
NO STEM ADAPTERS ARE NEEDED FOR 2-1/2” AND 3” VALVES.
MOUNTING BOLTS (4 EACH)*
MOUNTS BALL VALVE TO ACTUATOR
* FOR 1-1/2” & 2” VALVE USE (4) M6 X 16MM HEX HEAD SCREWS
TIGHTEN DOWN WITH A 6MM OPEN END WRENCH.
FOR 2-1/2” & 3” VALVE USE (4) M8 X 20 MM HEX HEAD SCREWS
TIGHTEN DOWN WITH A 8MM OPEN END WRENCH.