Bell & Gossett 176R0649C Technologic 502 Series Pump Controller - Manual (Page 42)

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39-31 Pump Alternation Time (Old
Par. 770)
0s 999s 0s When not all pumps are operating,
this determines the number of hours
of pump operation before pump
alternation occurs. When the pumps
are manually alternated using the right
or left arrow keys on the Local Control
Panel, this timer is reset.
39-32 Alternation Start Delay Time 0s 999s 0s It is often desirable to have alternation
occur at off peak times, such as at
night. To allow the system to be setup
during normal hours to alternate every
night this start delay parameter is used.
It defines the length of time before the
next alternation.
39-33 Pump Run Order
0 - Runtime Order
1 - First On First Off
2 - Sequential Order
0 2 2 The controller selects the next pump
to stage, destage or alternate. Equal
Running Hrs will cause the controller
to turn on the pump with the fewest
running hours and to trun off the piump
with the most running hours. Sequential
Order will turn on the pump to the right
of the lead pump and will turn off the
pump to the farthest left of the lead
pump regardless of running hours.
39-34 Lead Pump Number 1 4 A display of the current lead pump
number used by the controller for
sequential staging and destaging. This
is only significant if Sequenctial Order
is selected in P39-33.
39-35 “Alternate Lead Pump Now
[0] - No
[1] - yes”
0 1 0 Selecting [1] Yes will cause the
immediate alternation of the lead pump.
After alternation the parameter returnes
to [0] No.
39-39 Time Until Daily Alternation A display of the time remaining before
the next alternation will occur.
39-4* Alms/
Sensor
Fault
39-40 AFD Fail Proof Timer (Old
Par. 771)
0s 200s 10s After the controller commands a pump
to run, it will check for confirmation that
the pump is running. If the controller
does not receive run confirmation
before the timer set in this parameter
expires, it will stage on a different pump
and display WARINIG, DRIVE FAILED.
39-41 Pump Fail Proof Timer (Old
Par. 771)
0s 200s 10s
After the controller commands a pump
to run, it will check for confirmation that
the pump is running. If the controller
does not receive run confirmation
before the timer set in this parameter
expires, it will stage on a different pump
and display WARINIG, PUMP FAILED.
Table 6-2. Parameter 39-** Group, Detailed Description (continued)