11
4.8 Exiting default settings.
Selecting [End] on the display and pressing the OK button results in exiting the
parameter setting mode. Also, when during 60 seconds no buttons will be pressed at
all, exiting the mode occurs.
5. Additional features.
5.1 Installation water temperature decrease input.
The unit UMS-4PS has been equipped with input of decreasing the temperature of
installation water. Opening the contacts of this input makes the temperature of water in
central heating circulation fall by the value programmed by the user (see 3.3). The
solution enables the decrease of room nighttime temperature by connecting it to the
outside unit – a programmed clock. Decreasing the temperature of water in central
heating installation can be as well controlled by any room thermostat equipped with
a contact output.
CAUTION!
If the option of nighttime decrease is not used, then the contacts 6-7 of the
regulator should be closed or value of the parameter [d-10] should be changed to “0”.
CAUTION!
Installation water temperature decrease input shall not be connected to
any other UMP/UMS inputs directly.
5.2 Central heating turn-off input.
Closing 7-8 contacts of UMS-4PS unit will turn off the central heating system. The unit
will close the mixing valve (as in SUMMER mode), however it will not turn off the
central heating pump (as in WINTER mode). Additionally, the safety system will be
turned on to protect the central heating installation from freezing. Connecting the
programmed clock to the input will automatically turn off the heating at preferred times.
CAUTION!
If the heating turn-off option is not in use, contacts 7-8 of the unit should be
left open.
CAUTION!
The central heating turn-off option has a priority over the installation water
temperature decrease option. This means that if both options are turned on – the
heating turn-off option will be carried out.
CAUTION!
The heating turn-off inputs must not be connected with any other
UMP/UMS inputs directly.
6. Controller disassembly.
If controller disassembly is necessary, follow the procedure:
– Disconnect it from power supply
– Disconnect and place the controlling wires in safety
– Disconnect sensor wir e
– Remove the controller.