SECTION 6
LOW PRESSURE WATER
Jan 2001
Page 6-4
05114616
6.2.3 Boost Pump Pressure Adjustment
Adjustment must be made with the pump turned off and the inlet water turned
off.
The boost pump pressure relief valve (3) is adjusted by turning with a flat blade
screwdriver. Turn clockwise to increase pressure or counterclockwise to
decrease pressure. The relief valve adjusting screw is accessed by removing the
acorn nut on the side of the pump.
6.2.4 Low Pressure System Protection
System pressurization over 8.6 bar (125 psi) is prevented by the relief valve (10).
Pump overheating due to lack of water, or long deadheaded conditions, is
prevented by the temperature switch (2) on the boost pump (1), which turns the
pump off. To reduce boost pump overheating while deadheaded, water is
recirculated through orifice (7) and backflow check valve (8) to the boost pump
inlet.
Pressure Adjustment
Pressure Settings
Bar (psi)
Control
Increase Decrease Maximum Minimum
Boost Pressure
3
Clockwise
Counterclockwise
8.3 (120)
8.0 (115)
Boost Relie
10
Fixed
Fixed
9.0 (130)
8.6 (125)
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