KTM STREAMLINE L-IV 50, Operation And Service Manual

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SECTION 6
LOW PRESSURE WATER
Page 6-7
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6.2.3 Booster Pump Pressure Adjustment
Adjustment must be made with the pump turned off and the inlet water turned
off.
The booster pump pressure relief valve (14) 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. Note that replacing the acorn nut after
adjusting outlet pressure may change relief valve pressure.
6.2.4 Low Pressure System Protection
System pressurization over 8.6 bar (125 psi) is prevented by the relief valve (15).
Note that a leaking check valve in a sealing head (13) could cause relief valve
(15) to open. Booster pump overheating due to lack of water, or long
deadheaded conditions, is prevented by the temperature switch (7), which turns
the waterjet pump off. To reduce booster pump overheating while deadheaded,
water is recirculated through orifice (11) and backflow check valve (10) to the
booster pump inlet.
Pressure Adjustment
Pressure Settings
Bar (psi)
Control Item No.
Increase Decrease Maximum Minimum
Booster Pressure 14 Clockwise Counterclockwise 8.3 (120) 8.0 (115)
Booster Relief 15 Fixed Fixed 9.0 (130) 8.6 (125)