Application 1 - Danfoss ECL 2000 Installation Manual

6.3.2 Application 1

System diagram 1A
Heat circuit
Hot-water circuit
Heat circuit and hot-water circuit with indirect control via heat exchanger.
The motor valve M1 controls the flow temperature, which is measured by the sen-
sor S1. The return temperature measured by sensor S2 can be limited. The circula-
tion pump P1 is running when the reference flow temperature is above 20 °C or
the outdoor temperature is below 2 °C.
The motor valve M2 controls the hot-water temperature, which is measured by the
sensor S4. The return temperature measured by the sensor S5 can be limited. The
circulation pump P2 is controlled according to the ECL 2000's 7-day program and
according to the hot-water temperature (the pump is active when the reference hot-
water temperature is above 20 °C).
EI.65.D4.02
Application 1
41