Manual of instructions TT-181 18/33
5.5. Initial operation with heat transfer oil (Oil operation)
The temperature control unit can also be operated with heat transfer oil. The unit must be prepared
accordingly for this operation and after this the unit can be filled manually through the filler neck. A
guideline for the required filling amount can be taken from the technical data.
The unit may only be changed by a competent electrician.
The unit hast o be disconnected from the power supply!
Caution „residual water“ (temperature control unit, consumer, hoses) –
water in the oil can lead to dangerous operating conditions. The temperature
control unit can be overflow. Risk of injury by escaping oil-water mixture!
5.5.1. Close the automatic filling
The automatic filling must be closed.
Close the ball valve behind the solenoid valve (Pos.32 /P. 29).
5.5.2. Change stage switching (according to the electrical diagram)
The heat stages has to be reduced to 1 x 3kW by rewiring the terminal block on the inside of the
door. The two switches for the heater are new wired in OR-circuit.
5.5.3. Switching of the heating stages (according to the electrical diagram)
The heater must be wired in star on the contactors.
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