Danfoss DHP-R 7Ua, Руководство пользователя

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76*'+
10 – Danfoss VUBMG102
2�1�4 seasonal stop
During the warm season there is usually no need to warm the building. Howe-
ver, the outdoor temperature may temporarily (at night time) fall enough for
the control system to start a heat pump. To avoid this, the functions for seaso-
nal stop can be used.
When the outdoor temperature is persistently above the limit Heat stop limit
seasonal stop is activated. This means that no heat pumps are allowed to pro-
duce heat, and the auxiliary heater is blocked. Furthermore the main circula-
tion pump is stopped.
What is meant by persistently is defined by the time limit Activation time lim.
In order for the seasonal stop to be released, the outdoor temperature must be
at least Heat stop hyst degrees below Heat stop limit for at least Deactiv. time
lim hours.
The seasonal stop could cause the main circulation pump to stand still for a
long time. There is therefore a pump exercise function. Once every day the
circulation pump is started and run for one minute. The pump exercise times
can be adjusted.
The auxiliary heater can be blocked earlier, at lower temperatures. There is a
separate outdoor temperature limit and hysteresis for blocking the auxiliary
heating, but without the time limits.
2�1�5 room temperature feedback and curve displacement
It is possible to connect a room temperature sensor to the control system for
the master pump. Using the room temperature feedback function, the primary
supply temperature set point can be adjusted if the indoor temperature gets
too warm or too cold.
In the controller, the desired room temperature is set Room set point and the
feedback strength is adjusted. Zero deviation in the curve Curve room temp
feedback corresponds to a perfect room temperature. It is a good idea to not
have any curve adjustment for deviations close to zero, in order to avoid self
excitation.