FlowLine DataView LI55 Instruction Manual page 68

DataView™ LI55 Level Controller
Application #2: Pump Alternation Using Relays 3 & 4
1. Relays 1 and 2 are set up for low and high alarm indication.
2. Relays 3 and 4 are set up for pump alternation.
Set and Reset Point Programming
Relay Set Point
1
2
3
4
The following graphics provide a visual representation of a typical pump
alternation application with high and low alarm monitoring:
1. Relay #4 turns the main pump on at 6000 gallons and turns it off at 1000
gallons.
2. With the Pump Alternation feature activated, the next time the level reaches
6000 gallons, relay #3 transfers and starts the backup pump.
68
Reset Point
495
7500
7000
6000
Function
750 Controls low alarm
6900 Controls high alarm
900 Controls backup pump
1000 Controls main pump
Instruction Manual
MN301033 Rev B1