CARRIER CPLOWAMB001A00 MOTORMASTER-II LOW AMBIENT HEAD PRESSURE CONTROL MODULE

The Motormaster II head pressure controller is a cycle control device activated by a temperature sensor mounted on a header tube of the outdoor coil. It is designed to cycle the outdoor-fan motors to maintain the saturated condensing temperature within normal operating limits of approximately 130 to 110°F high (54°C to 43°C), 70 to 50°F low (21 to 10°C). The controller maintains working head pressure at low ambient temperatures down to -20°F (-29°C) when properly installed.