AC Power & Comfort - http://acpowercomfort.com/commercial-air-conditioning/commercial-boiler-repair-maintenance/
Was performing a Boiler Service Repair on a Lochinvar
Copper Fin II. This boiler serves for Cooling Tower water. When the climate temperature drops below the 40s, the boiler is energized and heats the water to a temperature that is considered normal. This is to help the heat pumps say running normal when in heat mode. If water temperature is to cold at the cooling tower and coming in at the heat pumps already cold, the heat exchanger will get colder and suction pressures will drop acting as if the unit is low and safety controls will open causing the heat pump to lock-out on the third try.