First pump comes on, if it cannot cope, it goes off
and next pump comes on (duty backup). This
continues until the last pump comes on and if it
cannot cope the first pump comes back on to assist
the last pump (duty assist) if the level continues to
rise all other pumps will come on (assist) in turn
until the level decreases to the pump off points.
Each pump has its own setpoints, (P213, 223, 233,
243, 253, 263 & P214, 224, 234, 244, 254, 264).
The third parameter for each relay determines the pump group. You can
have two groups of pumps, and all similar duties within that group will
operate together.
P212, P222, P232, P242, P252, 262 - Relay Pump Group
By default, all pump groups are set to 1, but if you want to have another
group, then set this parameter to 2, for each pump relay that should operate
together as part of a second group.
The fourth parameter, and the fifth parameter for each relay set the
pump “ON” and “OFF” points, which are entered in Measurement units
P104. For pump down the “ON” is set higher than “OFF”. For pump up
then “ON” is set lower than “OFF”. See the appropriate pump duty,
function table (P212, 222, 232, 242, 252, 262) for further information.
P213, P223, P233, P243, P253, 263 - Relay Setpoint 1
This parameter determines the “ON” point of the pump.
P214, P224, P234, P244, P254, 264 - Relay Setpoint 2
This parameter determines the “OFF” point for the pump.
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