Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security.
New Feature: AHRI System Builder

CRLOWAMB030A00 - Motormaster® V Low Ambient Control

Item: CRLOWAMB030A00

Store Inventory

Sign in to see real-time inventory at the stores closest to you.
What’s the price?
Sign in for pricing.
Decrease quantity
Increase quantity

Product Info


The Motormaster® V control is a motor speed control device which adjusts condenser fan motor speed in response to varying discharge refrigerant pressure. A properly applied Motormaster V control extends the operating range of air-conditioning systems and permits operation at lower outdoor ambient temperatures.
To operate these units at very low ambient temperatures, Motormaster V controls must be added. Field-fabricated and installed wind baffles are also required for units in areas with prevailing winds of more than 5 mph and where temperatures drop below 32°F (0°C). The Motormaster V control permits operation of the unit to an ambient temperature of –20°F (–29°C). The control regulates the speed of one 3-phase fan motor that is compatible with the control. Replacement of fan motor on most units is not necessary since the control is compatible with the factory-installed fan motors.
Field wiring of control is required.
This accessory kit will allow the Motormaster V Control to be used on heat pump units (using the single 3-phase outdoor fan motor). A second relay assembly is provided as part of the heat pump adapter kit to override the Motormaster V when in heat pump mode. The second relay must be installed by the technician. For cooling units, the second relay assembly is not needed.


Weight Pounds (lbs)
Width Inches (In)
Height Inches (In)
Hazardous MaterialNo
EPA Cert RequiredNo
Length Inches (In)

Equipment Part List

Shop all compressors