Trip shunt
The trip shunt device is fitted to the heater circuit breakers and on sensing that elements are too hot, will switch off
the circuit breaker’s and cut supply to heater contactors.
The trip shunt is controlled by a thermostat, normally open contact. This thermostat is set in the factory. This is a
safety device and setting it higher will NOT make hotter water. If the circuit breakers do trip, one must check that
there is not something restricting the water flow. The less water through the elements, the hotter the water becomes
e.g. a small leak caused by a leaking O-ring, a leaking gun etc…
Commissioning
Turn on the tap and let the water tank fill up. Connect the high pressure hose to the brass outlet at the bottom/left of
the cabinet using the black nut on hose end. Do not connect the gun yet.
Switch on the electricity supply, holding the high pressure hose in the one hand without the gun attached but pointing
the hose in a safe direction.
Switch on the machine by depressing the button on the right hand door of the cabinet marked
“Pump”
. Let the
machine run until there is a continuous flow of water, Switch off machine by pushing the
“Pump”
button and connect
the high pressure gun to the high pressure hose using the black nut on hose end. Connect the lance to the gun.
This machine has now been bled and is ready for operation. Switch on machine. It will build up pressure and go into
bypass. If the gun trigger is not activated the machine will run in bypass for approximately 6 seconds and then switch
off. If the gun is activated the pump will automatically switch on.
Ensure the gun is pointed in a safe direction.
If hot water is required, the
“Heater”
button is depressed in conjunction with the
“Pump”
button. The water must
flow continuously from the nozzle for 6 seconds before the heater contactors will be activated.
The DELAY-OFF timer on the running of the pump and the DELAY-ON timer on the heating elements provide a
longer life operation of the control contactors.
If a chemical is needed in the cleaning process, a chemical pick-up pipe is provided with the machine (if ordered),
remove the filter from the pipe and push it through the hole in the bottom of the cabinet. Replace the filter on the pipe
and insert it in a chemical drum. If the
“Chem”
button is depressed on the door of the cabinet, the chemical is taken
in with the water.
Never run the machine with the chemical drum empty and “Chem” button depressed! This causes the
machine to cavitate, which can lead to damage of the gearbox.
Maintenance schedule
Daily:
Ensure that there are no leaks on high pressure side of the machine, O-rings on hoses, guns, lances,
and no holes in high pressure hose.
Weekly:
Check oil level and if oil is grey or white in colour, replace by opening the sump screw at the bottom
of the gearbox casing over a collection reservoir. The oil is to be collected in the reservoir and
disposed of in an approved manner.
Monthly:
Check for water leaks under pump head. If water is leaking under the pump heads, the seals may
need to be replaced. This is to be done by a Kränzle trained technician.
Check for oil leaks and if found, the oil seals or gaskets are faulty and must be replaced by a
Kränzle
trained
technician.
Check the water inlet filter and clean if necessary.
6-Monthly:
Check all cable connections on terminal points and contactors and tighten if necessary.
