Bell & Gossett S13641B Technologic 5500 Series Pump Controller - Manual (Page 15)

15
3.10 ALTERNATION SETUP
3.10.1 See the following table for all alternation menu items.
ALTERNATION MENU ITEMS
Field
Menu Item Variable Default Range Value
Alternation Time Between: ###hr 0 0-999
Enter the time between automatic alternation cycles, hours.
Alternation Duration: ###s 20 0-999
The amount of time allowed to decelerate the running pump(s)
and start the new lead pumps, seconds.
3.11 BYPASS SETUP
3.11.1 See the following table for all bypass menu items.
BYPASS MENU ITEMS
Field
Menu Item Variable Default Range Value
Bypass No of AFDs Fail to go to bypass: # 0 0-6
Enter the number of AFDs that are required to fail prior to
running the pump(s) across the line. Generally the number of
drives controlled by the system.
Bypass No of Pumps go to bypass: # 0 0-6
After the number of AFDs fail as per above, this item determines
the maximum number of pumps allowed to start in bypass.
Before setting for all available pumps confirm that the system
can handle the flow.