Coil Pump adds a fractional horsepower pump to the preheat coil piping. This pump can be utilized either to provide Pressure/Flow Boost at the coil or a Low Temperature Circulation pump. Selecting the correct usage causes the pump to run at the appropriate time. The Both Pressure/Flow & Low Temp Circulation option combines the existing two sequences to start the pump either when the valve command exceeds zero or when the outdoor air temperature drops below the setpoint. The Dual Pumps option adds a second coil pump to operate in a duty/standby configuration. When you select Rotate to Balance Runtime with Dual Pumps, the application automatically shifts the lead to the pump with the lowest operating hours.