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Additional output [Ar 0] – the controller has been equipped with an output that
allows connection of the UM module. When the Ar parameter has the UM module
value “0” it may control the oil or gas boiler – if such boiler exists in the heating
circuit. After switching the controller with the main power switch the additional
boiler is turned off and it turns on again when there is no fuel in the solid fuel boiler.
This function is useful in heating systems where there is a solid fuel boiler used to
cut the heating costs. After erasing the “no fuel” alarm by pressing STOP button
the additional boiler is again turned off and the controller works again. Setting
parameter [Ar] to “1” allows controlling the additional alarm signaling system with
the UM module – which occurs on the controller.
When Ar parameter is set to “2” the UM module allows controlling the mixing valve
servo-motor in the central heating circuit depending on the room thermostat input.
In this case the work of central heating pump depends only on the boiler
temperature.
8. Factory defaults
The controller allows returning to standard settings set by the producer by choosing
[Prod] and pressing OK button. After activating this function, the controller sets
each parameter showed in the table.
9. Output testing
To make checking the controller work easier, it is possible to test output circuits
which control the fan and the pump, and the additional boiler launching system.
This function is available in service mode, only if the control process is off, i.e. the
controller was in STOP mode before switching to service mode. By choosing [outP]
on the display and pressing OK button you can turn on the central heating pump for
a while, by choosing [out
Π
] and pressing OK you can turn on the fan and by
choosing [outr] and pressing OK you can turn the additional boiler on (if the
additional module is connected). Choosing [outu] allows testing the hot water pump
output.
10. Exiting service mode
By choosing [End] option on the display and pressing OK button you can exit
parameter setting mode.
The controller also exits service mode, when no buttons are pressed for 1 minute.
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Additional functions
To improve comfort in heated rooms, the controller has been equipped with an
input that allows connecting any kind of room thermostat with contact output. When
temperature in the room is below desired temperature, the central heating pump is
turned on and the room thermostat indicator is lit.
It means that the boiler should keep temperature set by the room thermostat knob.
After reaching desired temperature in the room, the room thermostat indicator turns
off, the central heating pump is turned off and the boiler switches to mode in which
it keeps burning at minimum temperature.
