5.2.3 Making the connections
The above diagram is for the common 3 zone system, to see more diagrams go online to
get the full installation guide for the H3747.
The PTD supplied with the H3747 is assigned to control heating for zone 1 terminal 1 by
default. If hot water is required, this will be assigned to terminal 5. You can add more
zones as required by following the instructions earlier in this guide, then wiring the switch
live into the relevant terminal.
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