Manual of instructions TT-188 27/37
7. Safety and monitoring devices
7.1. Pump
The pump motor is fitted with an overload relay and pre-switch automatic cut-outs.
7.2. Heating – Temperature monitoring
In the temperature controller the maximum temperature (150°C) is limited. Exceeding this temperature
the heaters switch off.
A safety thermostat (155°C) with automatic reset protects additionally the system. Exceeding this
temperature the unit stops automatically and the indication lamp lights. The unit switches on again
when the temperature has been dropped permitted.
Do not put the maximum temperature in the controller higher, deeper values
are allowed!
The temperature control unit can excess overpressure – risk of injury from
escaping steam!
7.3. Level control
The unit is mounted with a level switch. If the system loses water, the yellow indication lamp lights and
the unit refills automatically until the level is reached, the yellow indication lamp will switch off.
If not enough water is in the unit the pump switches off, the yellow indication lamp lights and the horn
sounds. The unit fills automatically and the pump will switch on automatically as soon as the level is
high enough.
7.4. Flow control
The electronic flow control measures the actual flow in the heat transfer circuit and displays it digitally
on the controller. For controlling the minimal flow you can choose between automatic and manual
mode.
7.5. Temperature deviation control
As soon as the difference between pre-set desired value and the actual value exceeds +/- 5°C, the
LED indication lamp lights and the horn sounds, the unit still operates.
This alarm is only activated when the set temperature has been reached the first time. The value of
the temperature of the deviation control (factory preset +/- 5°C) and the starting interlock for
temperature deviation control (factory preset on) can be adjusted on the controller.
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