2.6 Electrical connections
All electrical wiring to the boiler (including grounding) must conform to local electrical codes and/or
the National Electrical Code, ANS/NFPA No. 70 – latest edition, or the Canadian Electrical Code,
C22.1 - Part 1. In addition, you should refer to the boiler's installation manual.
The control board diagram below shows the various wiring connections such as the thermostat,
accessories, heat pump, and external pump.
Figure 33 Air handling appliance - electrical wiring diagram
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