Application 16, Type 2 Only
EI.65.D4.02
107
System diagram 16B
Two separate heat circuits connected directly to the district heating network, and
with temperature control via mixing valves. Hot-water circuit with storage tank
connected directly to the district heating network and with temperature control via
a mixing valve.
Note:
ECL 2000 Type 2 must be used to control this application.
Heat circuit 1 The mixing valve M1 controls the flow temperature, which is measured by the
sensor S1. The return temperature measured by the sensor S2 can be limited. The
circulation pump P1 is running when the reference flow temperature is above 20
°C or the outdoor temperature is below 2 °C.
Heat circuit 2 The mixing valve M2 controls the flow temperature, which is measured by the
sensor S4. 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.
Hot-water circuit The storage tank is heated by the internal heat exchanger, which is connected di-
rectly to the district heating network. The mixing valve M3 controls the hot-water
temperature, which is measured by the sensor S10. The circulation pump P3 is
controlled according to the ECL 2000’s 7-day program and the hot-water tem-
perature (the pump is active when the reference hot-water temperature is above
20 °C).
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