How to model HP with supplemental heat?

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Hello All,

I am trying to model heat pump with supplemental heat supported by a gas fired boiler.

I connected hot water loop to the Supplemental Heat under Systems-->Heating-->Supp Heat/Defrost but the boiler is not turning on. The start point for the HW loop to support the HP was modeled at 45F.

Can anyone please advice on how to model this heat pump with hot water coil?

Thanks,

Fareed Syed EIT LEED(r) AP

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