Easy-Kleen MAGNUM 4000 Owner's Manual - Glossary Of Terms
GLOSSARY OF TERMS
PSI – Pounds per square inch. Pressure washers are designed and rated to operate at a specific
PSI. Operating at pressures exceeding the maximum rating could result in damage to the unit
and/or SEVERE PERSONAL INJURY.
GPM – Gallons per minute. The orifice on the pressure wand assembly has been selected to
deliver up to the maximum GPM for your machine.
PRESSURE WAND ASSEMBLY – This refers to the gun, wand, and nozzle.
PUMP – The pump moves the water through the system and delivers it to the pressure wand
assembly.
UNLOADER VALVE – Is a valve located at the head of the pump for unloading water back
into the bypass when the trigger gun is shut off. It also reduces the load on pump when gun is off.
OIL, PUMP – The oil used within the pump to lubricate its operation. Important to use only SAE
30 W Non Detergent (GP Pump) or Hydraulic 68 (EK Pump) in the pump (see diagram).
OIL, GASOLINE ENGINE – Machines which are powered by gasoline engines need
appropriate lubricant. Use 10W30 detergent oil.
BURNER – The burner heats the water in hot water pressure washers. It is located under the coil
and may be powered by furnace oil or diesel fuel.
BACK FLOW PREVENTER – Device to prevent flow backwards into potable water supply.
MAXIMUM WORKING PRESSURE The water heater coils are designed to operate safely at
normal working pressures of 4000 PSI. Each machine is equipped with a safety pressure relief
valve which prevents over pressurization of the high pressure system. It is an important safety
device and must not be tampered with in any way.
TEMPERATURE CONTROL- The water heater is equipped with a temperature control which
shuts down the burner in the event of excessive outlet temperature caused by insufficient water
flow through the heater coil. Do not set thermostat above 195˚F
HIGH PRESSURE SWITCH - A high pressure switch is used to control the burner. It is part of
the burner control system (see diagram).