ULTRA 4 INSTRUCTION MANUAL
128
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 (P2n5) 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.
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.
P2n2 – 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) for further information.
P2n3 – Relay Setpoint 1
This parameter determines the ‘ON’ point of the pump.
Important Notice
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”.
To Next Page
Loading...
