BWS350 System Installation, Operation & Maintenance
11
Repressurization Pump
The Repressurization Pump Assembly that comes
standard with the BWS350 System includes a dia-
phragm pump controlled by an internal Pressure
Switch, and a Buffer Tank between the Pump and the
downstream equipment maintains downstream pres-
sure. Water demand for downstream equipment is
directly supplied from the Buffer Tank, and demand
can go on and off as necessary. The RP Pump is not
directly affected by downstream demand, and down-
stream equipment is also not affected by the automatic
starting or stopping of the RP Pump. When the pres-
sure drops sufficiently in the Buffer Tank, the pump
starts automatically repressurizes the Buffer Tank.
The operating pressure for the RP Pump is preset (to
70 psi) and is NOT field adjustable.
The pump also incorporates check valves to keep the
Buffer Tank and downstream line pressurized. The
pump is equipped with auto-reset, thermal overload
protection and is designed for intermittent duty.
If the pump runs erratically, allow the pump to run
to open drain with valve fully open to purge air
from the pump head. Disconnect the power and
reconnect several times to facilitate air purging.
The pump will prime only if all the pressure is relieved
from the outlet port. The pump is self-priming up to
11 ft. The pump can run dry but will overheat and the
pump overload will shut the pump off.
Storage Tank Level Controls
(See also the Electrical Schematic at the end of this
manual.) For system control, there are independent
High and Low Water Level Float Switches in the
Storage Tank. When the Storage Tank becomes full,
the High Level Float Switch shuts off the Processor,
preventing flow to the Tank.
If the tank is empty, the Low Level Float Switch auto-
matically shuts off the RP
Pump. As long as the power
cord from the Tank/RP unit
is plugged in, and there is a
minimal amount of water in
the Storage Tank, the green
light is illuminated on the
Control Box (attached to the
Buffer Tank bracket), indicat-
ing that power is supplied
to the RP Pump. This light
means the RP unit is en-
abled, even though the RP
Pump may be automatically
turned off when the Buf-
fer Tank is pressurized and
operation of the Pump is not
needed.
Low Level Float Switch
Indicator light
