Ponast KP 21 - Fig.n. 22 Wiring Room Thermostat with Weekly Programme and Independent Drive Heating HUW; Fig.n. 23 Working Principle the Boiler in Mode Modulation

Automatic boiler for wood pellets
Instructions for installation and operation
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Figure number 20 – Schema wiring el. ignition + el. heating
Figure number 21 – Schema wiring electromotive control 4-way valve