Xylem AquaBoost CS and VS Pumping Packages - Manual (Page 34)

Parameter description Default setting
(seconds)
Variable range
(seconds)
Field setting
Pump fail to start proof timer 5 0-99
Low suction/high temperature off proof timer 5 0-99
Low suction/high temperature on proof timer 5 0-99
Duty/standby 0 0 = disabled
1 = enabled
Staging on proof timer 30 0-99
For more details on these settings see Sequence of operation for the duplex pumping
system (page 36).
Aquastat
The aquastat for high temperature cutout is set at the factory for 100°F (38°C). Adjust the
setting if a different cutout temperature is desired. Do not set the switch above 225°F
(107°C).
Optional tank
A variety of different tanks can be used with either the simplex or duplex units. Refer to the
specific IOM that was shipped with the tank for installation and operating instructions.
Pump package operation description
CAUTION:
A unit that shows symptoms of possible problems, such as overflow, noise, leaks,
vibrations, or continual operation, must be corrected immediately.
Constant speed operation
Constant speed simplex – for capacities up to 110 gpm
Condition Description
The city water pressure falls below the setting of the
system suction pressure switch (2PS).
The pump starts through a power relay.
The system pressure rises above the setting of the system
pressure switch.
The pump stops, provided the minimum run timer has
expired.
Constant speed duplex – for capacities up to 220 gpm
Condition Description
The city water pressure falls below the setting of the
system suction pressure switch (2PS).
The lead pump starts through a power relay.
The system pressure rises above the setting of the system
pressure switch.
The lead pump stops, provided the minimum run timer
has expired.
The system demand increases beyond the capacity of the
lead pump and the system pressure does not satisfy the
pressure switch settings.
The system automatically starts the lag pump and both
pumps run.
The system pressure rises above the settings of Pump 1
and Pump 2 discharge pressure switches (2PS and 3PS).
Both pumps stop, provided the minimum run timers
have expired.
Commissioning, Startup, Operation, and Shutdown
32 AquaBoost CS and VS Pumping Packages Installation, Operation, and Maintenance Manual