Autotrol Magnum Cv 942, Installation And Service Manual, Page: 50 / 86

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7.1.1 Twin Alternating Control Set-Up
Task
962M Main Control Position
Tank 1
962S Secondary Control
Position
Tank 2
1. Open manual bypass valve
2. Close manual inlet and outlet valves
3. Mount 962M main and 962S
secondary controls [962M and 962S
controls must be in the midpoint of the
SERVICE position before inserting
camshaft]
SERVICE SERVICE
4. Connect 12VAC power supply to 962M
control
SERVICE SERVICE
5. Program the 962M main control. (See
Table IIC for programming parameters.)
[LED will show ERR4 message
indicating controls require
programming]
SERVICE SERVICE
6. Exit programming mode. Depress up
and down buttons for 3 seconds or
wait 30 seconds
SERVICE SERVICE
7. Disconnect 12VAC power supply from
962M control
SERVICE SERVICE
8. Manually rotate camshafts to REFILL REFILL REFILL
9. Connect external cam switches REFILL REFILL
10. Connect 962M main and 962S
secondary controls with
factory-installed 4-pin connector.
REFILL REFILL
11. Reconnect 12VAC power supply and
optional battery backup to the 962M
REFILL REFILL
12. Observe controls for proper operation.
[Tank 1 control will rotate to the
STANDBY position followed by Tank 2]
STANDBY REFILL
13. Observe controls for proper operation.
[962M will remain in STANDBY . 962S
will rotate to SERVICE ]
STANDBY SERVICE
14. System is now ready for operation STANDBY SERVICE
When connecting the optional battery backup,
the black wire should be connected first!
Connecting the red wire first could result in serious
damage to the circuit board.
Important:
Con-