8= First On First Off,
alternate duty assist
The first pump switched on is the first
pump to be switched off, etc. regardless
of the set points, so the setpoints are
dynamically changed to enable this.
9 = Service Ratio Standby
When a service ratio duty is being used,
on all other pumps in use, the standby
pump can be started on a ratio basis
only, when it will assume the setpoints
of the next pump to start. The third
setpoint (P215, 225, 235, 245, 255) is
used to set the service ratio.
There are four pumps. Two rotate their
start-up sequence with each other. If the
two pumps cannot keep up, the level rise
to the setpoints of the other two pumps
which take over and rotate their
sequence with each other.
Important Information
The pumps are started and stopped at the “ON” and “OFF” setpoints.
To pump down (reduce level) then set “ON” higher than “OFF”. To
pump up (increase level) then set “ON” lower than “OFF”.
The third parameter for each relay determines the pump group. You can
have two groups of pumps, and all similar duties within a group will operate
together.
P212, P222, P232, P242, P252 - 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.
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