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1. Water heater
2. Shutoff valves.
3. Circulation pump.
4. Bypass damper.
5. Boiler.
6. Heat medium regulating valve.
7. Non-return valve.
8. Coarse filter.
9. Water pressure sensor (nc).
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MIxING UNIT DIAGRAM
WATER HEATER CONNECTION
HEAT MEDIUM REGULATING VALVE ACTUATOR
Water inlet
Water outlet
Water outlet
Water inlet
Direct flow connection
Counterflow connection
In order to attain maximum power the water heater should be counterflow connected.
In case of the direct-flow connection the water heater has lower power but higher frost-resistant properties.
Mixing unit diagram (not included in the delivery set) of the water heater is shown in the following figure.
WARNING!
The unit operates either in Winter or Summer mode. If the outside air temperature is below +10 °C the Winter mode is activated. If the out-
side temperature a10 °C the unit operates in Summer mode.
In Summer mode the unit operates regardless of the return heat medium temperature in the mixing unit.
In Winter mode the unit has following temperature limits:
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The unit may not be started when the return heat medium temperature is below +40 °C. If the return heat medium temperature is +40 °C
and higher the unit will be turned on with a 90 seconds delay.
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The unit turns off when the return heat medium temperature falls below +20 °C.
