HVAC controls

Now in its third edition and fully revised, this practical guide is aimed at technicians and staff who run and maintain the automatic controls that regulate heating, ventilation and air conditioning in buildings. It covers the whole spectrum of control equipment in use today, from how controllers and the devices they drive affect one another, to how individual control loops connect to a building automation system. Readers will also find guidance on setting up control systems and their functions, predicting and assessing performance, tracking operating parameters, and carrying out maintenance and testing.

The new chapter in this edition addresses a common upgrade: converting an older pneumatic control system into a hybrid of pneumatic and direct digital control. It explains the installation work and procedures involved, including adding DDC signal sensing and control algorithms to the pneumatic actuators that already operate dampers and valves.