Titlebook: Control Systems for Heating, Ventilating and Air Conditioning; Roger W. Haines Book 1987 Van Nostrand Reinhold 1987 Direct Digital Control

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Electric and Electronic Control Devices,Electrical controls are available in a wide variety of configurations, for every conceivable purpose in HVAC applications. All of these are based on one of four operating principles: the switch, the electromagnetic coil and solenoid, the two-position motor and the modulating motor.

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Complete Control Systems,In the previous chapter we discussed elementary control systems. These are, in general, the pieces and parts which can be fitted together to produce specific applications solutions.

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