Line voltage power is connected to the 15 amp breaker to power the pump and control circuit of the 5100 Series Comfort Plus Hydronic system. A neutral wire is required to allow the primary loop pump (circulator) to be powered with 120V power.
The 15 AMP breaker MUST remain "ON" to operate controls in the system if:
using the Comfort Plus Hydronic in conjunction with a heat pump or air conditioner.
using the Comfort Plus Hydronic to control other loads.
using the optional Steffes Time Clock Module.
using the Comfort Plus Hydronic to exercise the pumps during periods of inactivity.
NOTE: If utilizing the optional single feed kit, the neutral MUST be sized for the entire load of the heating system.