Technical data

33
In Automatic mode, each system solenoid valve opens if its system
pressure drops to a low-pressure condition and there is no alarm
pressure signal. In Manual mode, each system valve is selected by
means of two selector switches and the solenoid valve opens as long as
system pressure is below the set-point value and there is no system
alarm.
7.3.4 Level Switch Relay Coil Operation
The level switch relay coil is energized when tank level is above the level
switch height. This is when tank level is satisfied. The switch relay coil de-
energizes when tank level drops to the level switch height, at low tank
level.
INPUTS
Input 1: “Hand” position of Hand-Off- Auto Switch
Input 2: “Auto” position of Hand-Off- Auto Switch
Input 3: Pressure Switch of Pumping Unit
Input 4: Tank Level Switch
Input 5: System 1 Inputs
Input 6: System 2 Inputs
Input 7: System 3 Inputs
Input 8: System 4 Inputs
Input 9: System 5 Inputs
Input 10: System 6 Inputs
Input 11: Switch A – Down Position
Input 12: Switch A – Up Position
Input 13: Switch B – Down Position
Input 14: Switch B – Up Position
OUTPUTS
Output 1: “Power On” light
Output 2: Pump Motor Starter Coil and “Pump” light
Output 3: System 1 Solenoid Valve
Output 4: System 2 Solenoid Valve
Output 5: System 3 Solenoid Valve
Output 6: System 4 Solenoid Valve
Output 7: System 5 Solenoid Valve
Output 8: System 6 Solenoid Valve
Output 9: Level Switch Relay Coil
CONTROL LOGIC
Output 1: “POWER ON” LIGHT: Output 1 on when: Input 1 or Input 2
are on.
Output 2: PUMP STARTER COIL AND “PUMP” LIGHT Output 2 on
when: (Manual Mode System and Tank Filling) Input 1 on +
Input 3 on.
OR
(Automatic Mode) Input 2 on + Input 3 on + Input 4 on +
And Internal Timer times to 10 minutes. The timer begins when
Manual or Automatic mode is started and is reset when pump
turns off in Automatic Mode.