HALE Silencer AP Series, Installation, Operation And Service Maintenance Manual

Page: 47 / 146

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Section 3: Operating
Hale Products, Inc., May 2006, Rev-B
Oper ation
❑
TPM Relief Valve Procedures
1. Set the pressure indicator on the PMD control valve to a position slightly
above the normal operating pressure (even before water starts to flow).
2. When normal operating pressure is achieved (as indicated on the master
pressure gauge while the pump is discharging water), slowly move the
adjusting handwheel counterclockwise until the relief valve opens.
3. The AMBER indicator light illuminates. (See
Figure 3-3: “TPM / PMD Relief Valve Control.”)
4. Turn the handwheel slowly clockwise until the
light goes out.
5. When the pump is not in operation, turn the
handwheel clockwise to a position slightly
above the normal operating pressure. More
complete and detailed information is found in
the relief valve manual.
CAUTION !
THE PRESSURE INDICATOR ON THE PANEL IS
ONLY A ROUGH INDICATION OF TPM SETTING.
ALWAYS USE THE PRECEDING PROCEDURE TO
PROPERLY SET THE TPM RELIEF VALVE SYSTEM.
TPM System with Engine Governor
1. Set the pressure indicator on the PMD control valve to a position slightly
above the normal operating pressure (even before water starts to flow).
2. Power on the governor control per the manufacturer’s manual.
3. Set the discharge pressure using the RPM mode of the pressure governor
control.
4. Move the TPM handwheel counterclockwise until the relief valve opens and
the AMBER pilot light illuminates.
5. Turn the handwheel slowly clockwise until the AMBER light just goes out.
Then turn the handwheel one additional full turn clockwise.
Figure 3-3: TPM / PMD
Relief Valve Control