Boiler Hydraulic Diagrams - Cola DOMUSFIRE C17 Installations-, Bedienungs- Und Wartungsanleitung

After completing the DHW connection it is necessary to access the technical menu of the controller and select the
type of circuit; every specific DHW function set: DHW EXCHANGER, ACCUMULATOR (PUFFER) or DHW
STORAGE TANK appears on the display at the moment of heating-DHW switchover with one of the messages given
below and remains until the end of the DHW request by the thermostat or flow switch :

2.9.4 Boiler hydraulic diagrams

Control
system
Pellet heating
chamber
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Hydraulic diagram - Pellet boiler with pump
Pellet boiler
OUT
IN
KEY:
Drain cock
Pressure gauge/pressure sensor
Circulating pump
Membrane expansion tank
Shutoff valve/cock
Non-return valve
Circuit/heating chamber air vent
Pressure relief valve P max 3 bar
Pressure relief valve P max 6 bar
Thermostat T>
85 °C
A - DELIVERY Heating male 1"
B - RETURN Heating male 1"
C - DHW DELIVERY male 3/4"
D - DHW RETURN male 3/4"
E - Water supply F1/2"
F - Water overpressure discharge F1/2"
Flow switch
Plate heat exchanger for DHW
Circuit balancing valves
Automatic thermostatic valve
Safety sensor T > 85 °C
Water temperature sensor
Circuit pressure sensor
Valves to be included in the system during
installation - not supplied with the unit
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DOMUSFIRE C17-C24