14Application 13 - Danfoss ECL 2000 Installation Manual

6.3.14 Application 13
System diagram 13
Heat circuit 1
Heat circuit 2
Hot-water circuit
Two heat circuits with common heat exchanger and a hot-water circuit with direct
control of storage tank.
The motor valve M1 controls the flow temperature, which is measured by the sen-
sor S1. The return temperature measured by the sensor S2 can be limited. The cir-
culation pump P1 is running when the reference flow temperature is above 20 °C
or the outdoor temperature is below 2 °C.
The mixing valve M2 controls the flow temperature in the mixing circuit, which is
measured by the sensor S4. The flow temperature measured at S4 in heat circuit 2
influences the temperature level at S1 in heat circuit 1. The return temperature
measured by the sensor S5 can be limited. The circulation pump P2 is running
when the reference flow temperature is above 20 °C or the outdoor temperature is
below 2 °C.
ECL 2000 Type 1:
The motor valve M
(ON/OFF)
which is measured by the sensor S6. The actuator M
opens/closes completely upon receiving a relay signal from the controller. The
circulation pump P3 is not controlled by the ECL 2000 Type 1.
EI.65.D4.02
performs on/off control of the storage tank temperature,
Application 13
must be of a type that
(ON/OFF)
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