4.2
Drinking hot water control
As soon as a flow is detected in the domestic hot water, the corre-
sponding control valve is used to make adjustments to the set nom-
inal temperature.
The following functions for automatic adjustment of the specified
setpoint prevent excessive heat from being drawn from the heat net-
work.
If the temperature in the supply from the heat network is too low to
allow the specified setpoint to the reached, then the controller auto-
matically reduces the nominal temperature to a value that can be
reached. As soon as the temperature from the heat network is suffi-
cient again, then the set nominal temperature is used again.
If the current nominal temperature is not reached for an extended
period, then the controller reduces the setpoint to the hot water tem-
perature currently reached for a few minutes.
If the domestic hot water temperature exceeds a specified maximum
temperature, then the drinking water control switches off until the
temperature has cooled down again (this setting can only be made by
service personnel).
4.3
Heating control
If there is a heat request from the room thermostat (potential free
contact closed), then the heating supply is adjusted to the specified
setpoint by means of the corresponding control valve.
The following functions for automatic adjustment of the specified
setpoint prevent excessive heat from being drawn from the heat net-
work.
If the temperature in the supply from the heat network is too low to
allow the specified setpoint to the reached, then the controller auto-
matically reduces the nominal temperature to a value that can be
reached. As soon as the temperature from the heat network is suffi-
cient again, then the set nominal temperature is used again.
If the current nominal temperature is not reached for an extended
period, then the controller reduces the setpoint to the temperature of
the heating supply currently reached for a few minutes.
If the temperature of the heating supply exceeds a specified max-
imum temperature, then the heating control switches off until the
temperature has cooled down again (this setting can only be made by
service personnel).
Setpoint reduction
Setpoint reduction to actual value
Maximum domestic hot water tempera-
ture
Setpoint reduction
Setpoint reduction to actual value
Maximum supply temperature
H3000 E
Functional description
01/2023
Item no. 215251
EA no. EA-1291
Operating instructions
21