Question

Low ambient controls force the compressor to work harder than it normally would need to in cold ambient temperatures. The need for low ambient controls can be reduced or eliminated by __________.

1) Using a variable speed compressor
2) Installing a larger condenser
3) Adding a crankcase heater
4) Increasing the refrigerant charge

Answer 1

Low ambient controls force the compressor to work harder in cold temperatures. The need for low ambient controls can be reduced or eliminated by using a variable speed compressor, installing a larger condenser, adding a crankcase heater, or increasing the refrigerant charge.

Step-by-step explanation:

Low ambient controls force the compressor to work harder in cold temperatures. The need for low ambient controls can be reduced or eliminated by:

1. Using a variable speed compressor which adjusts its speed based on the ambient temperature. This allows the compressor to work at an optimal level, reducing the need for additional controls.
2. Installing a larger condenser to increase the cooling capacity. A larger condenser can handle lower ambient temperatures more effectively.
3. Adding a crankcase heater to warm up the compressor before starting it in cold temperatures. This reduces the workload on the compressor.
4. Increasing the refrigerant charge to provide more cooling capacity. This helps compensate for the lower cooling efficiency in cold ambient temperatures.