Application 2
EI.65.D4.02
46
System diagram 2B
Boiler system with control of heating plant and hot water tank.
Note:
This application is designed for the Type 1 controller and is not used with Type 2.
Heat circuit The heat circuit is connected directly to the boiler. 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 when the outdoor tem-
perature is below 2 °C.
Hot-water circuit The charging pump M
(ON/OFF)
performs on/off control of the storage tank tempera-
ture, which is measured by the sensor S6. The circulation pump P2 is controlled
according to the 7-day program.
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