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Operating instructions
3.8 Storage
Frost-free room or anti-freeze solution!
We recommend you to store the machine in a frost-free room between cleaning tasks. The machine must
be emptied of water prior to storing for a longer period. This is done as follows:
1. Detach the inlet water hose. Detach and drain the spray lance.
2. Start the machine, and let it run with open spray handle until all water has run out.
If the storage area is not frost-free, the machine should be protected with an anti-freeze solution. Contact
your distributor for further information about the anti-freeze equipment of KEW Technology. Follow the
instructions provided with the anti-freeze equipment.
Coil the high pressure hose and allow the quick-connect end to lie on the floor. Holding the coiled hose at
waist level, squeeze the trigger to drain the hose and spray handle. Coil the power cord. Place them on the
handle (17). The spray lance can be stored in one of the holders (18) on each side of the machine.
3.9 Safety devices on the machine
Motor protection:
The machine features an overcurrent release built into the electrical system which will stop the machine if
the motor and/or pump are overloaded. The machine can only be restarted after it cools. Use that time to
find the reason for the overloading!
Pump:
The pump is equipped with a combined “unloader” and automatic start/stop valve system. The unloader
automatically relieves the pump load when the trigger is released and dtops the motor. This ensures that
the water is not circulated and heated inside the pump. The machine will re-start when you squeeze the
trigger.
The pump also features a safety valve ensuring that the pressure in the pump will never exceed the value
adjusted from the factory. The safety valve is sealed and should only be adjusted by an trained service
technician.
Thermostat:
The discharge water temperature is controlled by a mechanical thermostat. The thermostat is calibrated
from the factory and must not be re-adjusted. The thermostat unit also controls the heating stage function.
Safety thermal breaker:
The safety thermal breaker is a temperature sensor of the manual-reset type. The sensor is placed on the
inlet side of the burner coil and interrupts the supply of fuel oil and No Scale if the water temperature ex-
ceeds 140°F at this point. Once it trips, it must be reset manually. Until the cause is found, the machine
can still be operated in the cold water mode.