I have a pentair ultratemp heat pump and a Hayward 400k btu nat gas heater to heat a 50k gallon pool. Hayward fails regularly so I want to add a redundant 400l btu pentair heater in series and never run any heater at same time as the other. My question is how to configure and wire in pentair intellicenter. Can I just add this as a hybrid heater in a circuit?