hvac control symbols

Meanings of commonly used HVAC control symbols

Outlined below are the most commonly used hvac control symbols and their meanings.

Click here to view easy-to-use compiled charts of these symbols.

pressure sensor symbol

pressure sensor

Measures pressure of gases or liquids.

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VARIABLE SPEED DRIVE

VSD enables variable control of motor speed and torque so that hvac systems can run at optimum efficiency.

Flow switch symbol

Flow switch

Flow switches trip pumps on or off to control fluid flow.

air conditioning symbol

Air conditioning controller

An electronic module that controls the hvac system.

carbon monoxide sensor symbol

carbon monoxide sensor

Sensors used to measure and thereby limit carbon monoxide.

co2 sensor symbol

co2 sensor

Used to measure CO2 concentration in air and adjust ventilation system accordingly.

DIFFERENTIAL PRESSURE TRANSDUCER symbol

DIFFERENTIAL PRESSURE TRANSDUCER

DPTs measure pressure difference across a region and aid in hvac zones systems such as stairwell pressurization, lift pressurization ,etc.

building management system symbol

BUILDING MANAGEMENT SYSTEM

BMS is a computer based system that monitors the equipment systems of a building.

relative humidity sensor symbol

Relative Humidity sensor

Measures relative humidity of air.

Velocity meter symbol

Velocity meter

Measures air velocity in ducts.

flow meter symbol

FLOW METER

Measures flow in ducts and pipes.

Top to bottom symbol

Top to bottom

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side to side

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side to bottom

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Damper

Dampers are used to regulate airflow.

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VAV Box

VAV boxes regulate air flow through a duct.

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THERMAL Energy Meter

Thermal Energy Meters measure amount of energy content in chilled water liquid flow.

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Heat Exchanger

Heat exchanger is a device that transfers thermal energy from one medium to another.