1. General
The heating and district heating controller is designed for weather-compensated flow tempera-
ture control. This means it controls the flow temperature of a heating system based on a heating
characteristic so that the room temperature is always maintained at the desired level regardless
of the outdoor temperature. When used as a district heating controller, the controller can limit
the return flow temperature variably according to the outdoor temperature.
A drinking water heating system may be operated from the primary heating circuit, using a sec-
ond control loop, or from the secondary heating circuit.
A differential temperature control featuring a meter tracking the operating hours of the solar
circuit pump is included in three system configurations for the solar heating of drinking water
storage tanks.
The connected sensors allow the controller to measure the respective temperatures which are
transmitted to the central signal processing system. Subsequently, this system issues a three-step
or on/off control signal corresponding to the preset set points for each of the two control loops.
In addition, the controller controls the heating circulation pump and the pumps for drinking
water heating. The signal from a heat meter that is proportional to the flow rate or capacity can
be connected to a pulse or current input. This enables the limitation of a maximum and/or mini-
mum flow rate or capacity.
These mounting and operating instructions are valid for:
Firmware version 1.0 upwards
(The firmware version installed appears for 2 seconds in the display when the controller is
switched on)
Whats new compared to the previous version?
The circulation pump ZP runs on a time schedule in all systems.
1.1 Notes for the user
The installation of the controller and its electrical connection described in the following and,
must be carried out by authorized personnel only.
The settings for configurations described in chapter 7.1 also require specialized knowledge of
heating systems and should only be performed by an expert. This also applies for the descrip-
tion of the controller functions and system configurations described in chapter 4 and 5.
The start-up of the controller is normally carried out by authorized personnel all configuration
data should be entered into the configured data tables in chapter 9.
The controller is programmed with default temperature values and time schedules that can be
changed on start-up or by the user at a later date over the menu described in chapter 7.2.2.
The settings for the end user
and non-expert should be restricted to changing the heatings flow
temperature to inc rease or dec rease room temperatures (c hapter 6.3.3 on page 37) and
changing the set times-of-use (chapter 7.2.2 on page 51).
The current time and date are saved in memory for at least 24 hours when the controller is
left unconnected to the power supply. Other configuration data are stored in memory indefi-
nitely and cannot be lost.
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