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Hello, I'm a design builder user so hopefully you can extract the E+ objects from the following description:

When setting up a loop like this, I connect the W2AHP in series with the boiler. The W2AHP is first in line. In the Plant Equipment Operation, Scheme, heating load, I select the equipment (heat pump and boiler) and set the priority, with the heat pump as priority 1. This configuration allows the heat pump to provide as much heating as capacity allows and the boiler will add to meet the plant loop temperature setpoint. You can set the -10C minimum outdoor air temperature for heating in the object of the heat pump.