Motormaster Low Ambient Controller

The MotorMaster is a fan speed control device activated by a
temperature sensor. It is specifically designed to control condenser
fan motor speed in response to the saturated condensing
temperature during operation in cooling mode only. For outdoor
temperatures down to --20_F (--28.9_C), it maintains condensing
temperature at 100_F ± 10_F.

The mounting control consists of a solid--state circuit on a printed
circuit board in an aluminum extrusion, and a sensor assembly to
be mounted to a return bend on the unit’s condenser coil. A wire
from the sensor is connected to the circuit board in the control box.
Parts necessary for mounting control and sensor assembly are
included in the kit. Either assembly can be replaced independently
of the other. If any damage to the printed circuit board or
components is observed when unpacking control assembly, return
for replacement.

The MotorMaster maintains proper condensing temperature at
any ambient temperature down to --20_F (--28.9_C). No field
adjustments or calibrations are required.