Page 240 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
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Appendix D: Pump Control
All of these algorithms can be used to start multiple pumps (assist) or one pump at a time
(backup).
The HydroRanger 200 (all models) has three main methods of pump control:
Fixed
Starts pumps based on individual setpoints and always starts the same pumps in the
same sequence.
Alternate
Starts pumps based on the duty schedule and always leads with a new pump.
Service Ratio
Starts pumps based on user-defined ratio of running time.
Fixed Duty Assist (P111 = 50)
Ties the indexed pump relay directly to the indexed setpoint.
Relay Operation (for P118 = 2)
The relay contact closes at the ON setpoint and opens at the OFF setpoint. Multiple relay
contacts in the pump group can be closed at the same time.
Relay Table
The following table shows relay status when each setpoint is reached.
Fixed Duty Backup (P111 = 51) [6 relay model]
Ties the indexed pump relay directly to the indexed setpoint.
Please note that this feature applies to the HydroRanger 200, 6 relay model.
Relay Operation (for P118 = 2)
The relay contact closes at the ON setpoint and opens at the OFF setpoint. When a new
relay trips the previously closed relay contact opens to shut down the running pump.
Only one relay contact in the pump group can be closed at any one time.
Relay Table
The following table shows relay status when each setpoint is reached.
Relays
Setpoints
Index
123
On 3 On On On
On 2 On On Off
On 1 On Off Off
Off 0 Off Off Off
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