KEY UMS-4PS, Руководство по эксплуатации

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Picture 1. Front panel of UMS-4PS.
The operation of the controller boils down to setting threshold temperatures
WINTER/SUMMER and the value of the decrease in temperature. Controlling the
servomotor of the mixing valve and the central heating pump is obtained automatically
on the basis of the temperatures and service parameters set by a fitter.
During regular work when one of the two measured temperatures is displayed, the
indicator on the extreme right shows the regulation mode of the controller:
– when the light is on, the controller is in the WINTER mode. In this mode the task of
the controller is to maintain an appropriate temperature in the central heating system.
The temperature depends on the outside temperature or the mean outside
temperature as well as the programmed weather characteristics,
– when the light is off, the controller is in the SUMMER mode. In this mode the
controller closes the mixing valve and turns off the central heating pump. To avoid
jamming, the pump is turned on once a day for a minute.
Access to all parameters that can be changed by the user is available thanks to + and
– buttons. The list of all parameters is included in Table 1. The way of changing
particular values can be found in the description of the parameters.