Van Air Systems Sentinel MDV-400L Series - Manual (Page 3)

PAGE 3
3.0 ADJUSTING THE TIMER
3.1 Refer to FIGURE 1 for button description
3.2 Firmly push the mode key and up arrow key simultaneously and hold for a full 3 seconds. The display will
change to allow adjustment to the valve closed and open times.
3.3 Use the up or down arrow keys to set the hours you wish the valve to remain closed. Press the enter key. Use
the up and down arrow keys to select the minutes you wish the valve to remain closed. Press the enter key. Use
the up or down arrow key to set the minutes you wish the valve to remain open. Press the enter key. Us the up or
down arrow key to set the seconds you wish the valve to remain open. Press the enter key. Your timer is now set.
4.0 REQUIRED MAINTENANCE
Periodically check the valve for the following:
4.1
Press and hold the Mode and Enter key for 3 seconds to verify valve rotation. The display should say “OVER-
RIDE” and the valve should rotate from closed to open and back to closed.
4.2 Check actuator to valve connection area for debris which could impede proper operation.
4.3 Check wires and/or electrical connections for signs of damage.
4.4 Check valve for leaks. If leaks are present, remove pressure from the system and replace the ball valve.
4.5 Check fasteners for tightness.
FIGURE 3 ASSEMBLY OF ACTUATOR AND VALVE (1-1/2” AND LARGER)
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.