Automatic adjustment of R2 can be adopted.

How are the control methods of York central air conditioning systems classified?

The control methods for central air conditioning systems are generally selected based on the allowable temperature fluctuation range in the air-conditioned rooms and a technical-economic analysis. For systems with a fluctuation range greater than ±1°C, manual control can meet the requirements; whereas for systems with a fluctuation range less than ±10°C, automatic control can be used.

Air conditioning automatic control systems can be classified by the type of energy they use into electric, pneumatic, and electro-pneumatic systems.

Electric systems are more commonly used, while pneumatic systems are often applied in places where production processes require fireproofing and explosion-proofing.

Source: Beijing York Air Conditioning Repair Phone Center http://blog.sina.com.cn/yuekekongtiaoweixiu.