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5 Commissioning, Startup, Operation, and Shutdown
Condition
The system pressure falls below the set point.
The system pressure rises above the set point.
Low-suction pressure switch
Simplex and duplex units will run when there is demand unless the optional low-suction
pressure switch trips due to low city pressure.
The low-suction condition resets automatically when city pressure returns to an
acceptable level.
Temperature relief valve
The variable-speed units have a temperature relief valve that senses water temperature
inside the pump.
The valve opens and closes depending on the water temperature. This modulating action
maintains a relatively constant fluid temperature even as operating conditions vary.
Condition
The water temperature exceeds the valve opening
temperature, typically 120ºF (49°C).
The water temperature falls below the opening
temperature by 10º F (5.5°C).
24
Description
The pump starts automatically and pump speed
continues to ramp up until the system pressure satisfies
the set point.
The pump automatically reduces speed until the system
pressure reaches the set point, provided the minimum
run timer has expired.
Description
The valve automatically opens to allow relatively cooler
supply water to refill the pump as the hot water is
discharged to the drain or low pressure return.
The valve automatically closes in order to conserve water
and reduce waste.
AquaBoost VS Pumping Packages INSTRUCTION MANUAL
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