5
ELECTRICAL WIRING FOR TIMER USED IN 4-20 ma MODE:
1. Connect 120VAC supply to NEUTRAL and HI (TB 1) (located on lower board).
2. Connect TRANSMITTER’S 4-20 ma Transducer output to TIMER 4-20 ma input terminal
block. Connect Plus to Plus (+) and Minus to Minus (-). (TB 1) (located on upper board).
3. Connect one side of each valve to the COMMON TERMINAL (TB 1) (lower board).
4. Connect the other side of each solenoid valve to the SWITCHED OUTPUTS
(TERMINAL 1 through 40), sequentially (TB 3 & TB 4) (located on lower board).
5. SWITCH (SW1) OFF position
↓
for this mode of operation. This will disengage the OFF
ADJ potentiometer control, timer will respond automatically to the 4-20 ma signal.
6. Adjust the “inches H
2
O” Potentiometer to the desired set point.
ELECTRICAL WIRING FOR TIMER USED IN HOLD-OFF MODE:
1. Connect 120VAC supply to NEUTRAL and HI (TB 1) (lower board).
2. Connect external 120VAC Hold-Off Signal to the Timer Hold-Off Terminal (TB 1) (upper
board).
3. Connect one side of each valve to the COMMON (TB 1) (lower board).
4. Connect the other side of each solenoid valve to the SWITCHED OUTPUTS
(TERMINAL 1 through 40), sequentially (TB 3 & TB 4) (located on lower board).
5. SWITCH (SW1) ON position
↑
for this mode of operation. This will engage the OFF
ADJ potentiometer control, OFF ADJ is now operator settable.
6.
Adjust the “inches H
2
O” Potentiometer to the desired set point.
FOR USE AS CONTINUOUS CYCLE TIMER:
1. Connect 120VAC supply to NEUTRAL and HI (TB 1) (lower board).
2. Connect one side of each valve to the COMMON TERMINAL (TB 1) (lower board).
3. Connect the other side of each solenoid valve to the SWITCHED OUTPUTS
(TERMINAL 1 through 40), sequentially.
4. SWITCH (SW1) ON position
↑
for this mode of operation. This will engage the OFF
ADJ potentiometer control, OFF ADJ is now operator settable. Timer will cycle
continuously.
