Operation Manual

3. Decalcify heating tube coil when necessary. Frequency depends on the

amount of calcium in your water. When decalcifying acid is used follow the

instructions of the manufacturer in order to prevent damage to the machine.

MAINTENANCE TABLE

Weekly Monthly Every 3

months

When

necessary

Check oil level

•

Clean tankfilter

•

Refresh oil

•

Decalcify tube coil

•

6.0 FUNCTIONING AND PROTECTION

The on/off button (fig. 1;217) starts the electromotor. This switch is also the

resetbutton for the thermal overload device, which protects the motor from

overheating.

The high pressure water pump (fig. 3;133) is direct driven by the motor. Low

pressure water from your own watersupply runs through a self controlled floatation

tank (fig. 3;139) to the pump. Detergent can be mixed in by a dosaging cock (fig.

1;163) from an internal (fig. 3;169) or external tank.

The pressure control valve (fig. 1;173) controls the pressure of the water that goes

to the heating tube coil. When the machine is not set to deliver the maximum

pressure, the extra pressure runs back to the waterinletpipe through a return

mains (fig. 3;175).

For example when low pressure is needed, or when the start/

stop trigger is not squeezed when the machine is running.

In the heating tube coil, the water is heated by an oilburner. A thermostat (fig.

4;148) placed at the end of the tube coil, constantly checks the watertemperature

and compares this to the temperature which has been set at the thermostat at the

front of the machine. When temperature is too low, the burner starts, when the

water has reached it's temperature, the burner stops.

The tube coil is three times protected agains overheating:

1. thermostat knob (fig. 1;218)

: when the right temperature is reached, the fuel

circuit is closed by an electric valve.

2. water mains switch (fig. 3;187):

this protection checks if suffient water is

flowing through the tube coil. If not, then the switch closes the fuel circuit by an

electric valve.

3. microswitch

: this switch is set to the pressure regulator. When the pressure is

set too low, (less then aprox. 30 bar/420 psi) the microswitch closes the fuel

circuit by an electric valve.