SAFETY COMPONENTS
UNLOADER VALVE
The Unloader Valve allows all of the water delivered by the pump to return to the pump suction side. If the
trigger gun is closed or “OFF”, the Unloader Valve goes into the “bypass mode” and the pump runs without
pressure.
HOWEVER, THE PUMP MAY BE SEVERELY DAMAGED, DUE TO EXCESSIVE
OVERHEATING, IF LEFT RUNNING IN THE “BYPASS MODE” OR “GUN-OFF” SITUATION FOR MORE
THAN 6 MINUTES.
SAFETY RELIEF VALVE
The Relief Valve prevents the machine from being subjected to abnormally high pressures. If this situation
occurs, the valve will blow off relieving the pressure in the coil. This valve may also operate if the Unloader is
adjusted too high.
PRESSURE SWITCH
The Pressure Switch ensures that there is pressure, and therefore there is water flow at the head of the pump.
This control does not operate at less than 300 psi. Therefore if the pump is on “bypass mode”, the burner will
not operate.
THERMOSTAT
The built-in thermostat stops the unit from overheating. Maximum temperature of the unit is 300° F (150°C)
Above this temperature, the burner stops automatically.
THINGS TO CHECK REGULARLY
1. Check for SYSTEMS LEAKS. Leaks in the pressure side of the system can cause premature wear (or
even failure) of the pump. The WARNING signal for this kind of leak is “frequent” cycling of the Unloader.
(“FREQUENT” means more than once every 2 minutes in the “Gun-Off” position.) Check the gun and
swivel joints for leaks.
2. Check the OIL LEVEL at least once a week. Add ONLY the type and grade of oil specified for this pump.
3. CHANGE OIL as recommended. After first 20 hrs then every 200 hrs or once per year.
4. After you use any cleaning chemicals, thoroughly FLUSH the system with clean water.
5. Inspect the POWER CORD regularly. Also, check the POWER OUTLET SOCKET. For safety, replace
worn or damaged parts immediately.
6. Never run the washer without water. TURN WATER ON FIRST.
7. PROTECT FROM FREEZING! When transporting your washer in temperature below 32°F (0°C),
WINTERIZE the pump, hoses and gun.
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Summary of Contents for HPW-2600G
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