Danfoss ECL Comfort User Manual page 4

Before you start
Sketch your application
The ECL Comfort controller series is designed for a wide range
of heating, domestic hot-water (DHW) and cooling systems
with different configurations and capacities.
If your system differs from the diagrams shown in section
10, you may want to make a sketch of the system about to
be installed. This makes it easier to use the Installer's Guide,
which will guide you step-by-step from installation to final
adjustments before the end-user takes over.
The controller is pre-programmed with factory settings that are
shown in the relevant sections of this guide.
However, you might come across some settings that are not listed
in this instruction. These settings could be related either to recent
updates or the use of optional modules (which are described in
the instructions in question).
How to use this guide
This guide is divided into two parts:
• User's Guide: Yellow sections 1-7
• Installer's Guide: Grey sections 10 and onwards
The application L05 is very flexible. These are the basic principles:
Heating:
Typically, the flow temperature at S5 is adjusted according to
your requirements. The flow temperature sensor (S5) is the most
important sensor. The desired flow temperature at S5 is calculated
in the ECL controller, based on the outdoor temperature (S1).
The lower the outdoor temperature, the higher the desired
flow temperature. The heat pump is switched ON when the
flow temperature is lower than the desired flow temperature.
A switching difference (line C) determines the action. The heat
pump is switched OFF when the flow temperature is higher
than the desired flow temperature or the max. limitation value
for the return temperature. If the measured room temperature
does not equal the desired room temperature, the desired flow
temperature can be adjusted. The circulation pump, P1, is ON
when the desired flow temperature is higher than 20 °C or the
outdoor temperature is lower than 2 °C.
The mixing circuit is used for a more efficient distribution of the
heating: The flow temperature sensor (S3) is the most important
sensor in the mixing circuit. The motorized control valve (M1) is
opened gradually when the flow temperature at S3 is lower than
the desired flow temperature and vice versa. The value of this
desired temperature influences the temperature in the heat pump
circuit.
DHW:
If the measured DHW temperature is lower than the desired DHW
temperature (a switching difference determines the action), the
change-over valve / DHW-pump is activated and the heat pump is
switched ON in order to heat the DHW. If the return temperature
rises above the accepted level, the heat pump is switched OFF and
stage 2 is switched ON.