Nibe VPB - For the Installer; General Product Description; Transport and Storage; Supplied Components

Temperature limiter
Power supply to temperature limiter (FD1) is 230 V.
Connect temperature limiter (FD1) electrically to the
solenoid valves, one to each heat source.
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Temperature limiter wiring diagram
17Chapter 5 | Electrical installationVPB/VPBS UK