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  2. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    Doing these three steps are super essential and is the key to keeping an HVAC system running for a long time. A customer should do these three steps every couple of months or when it is suspected problem with the HVAC system. [citation needed] Some signs that could lead to a potential problem is if the HVAC system does not provide air cool enough.

  3. Thermostatic mixing valve - Wikipedia

    en.wikipedia.org/wiki/Thermostatic_mixing_valve

    Tempering valves for use on hot water heat distribution systems; High flow rates suitable for use in under floor (radiant) heating applications; Allows water to be stored at a higher temperature; Group Control. These provide a uniform distribution temperature for all hot water outlets in a household. Designed for multi-point applications

  4. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    Diagram of natural draft gas furnace, early 20th century. The first category of furnaces is natural draft, atmospheric burner furnaces. These furnaces consisted of cast-iron or riveted-steel heat exchangers built within an outer shell of brick, masonry, or steel. The heat exchangers were vented through brick or masonry chimneys.

  5. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    The left side is connected via one wire of a pair to the heater control valve. Moving contact attached to the bimetal coil. Thence, to the heater's controller. Fixed contact screw. This is adjusted by the manufacturer. It is connected electrically by a second wire of the pair to the thermocouple and the heater's electrically operated gas valve ...

  6. Muffle furnace - Wikipedia

    en.wikipedia.org/wiki/Muffle_furnace

    The doorway is closed by two fireclay blocks at E. High temperature muffle-furnace, maximum temperature is 1,473 K (1,200 °C; 2,192 °F). A muffle furnace or muffle oven (sometimes retort furnace in historical usage) is a furnace in which the subject material is isolated from the fuel and all of the products of combustion, including gases and ...

  7. Thermostatic radiator valve - Wikipedia

    en.wikipedia.org/wiki/Thermostatic_radiator_valve

    A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.

  8. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

  9. Instrumentation in petrochemical industries - Wikipedia

    en.wikipedia.org/wiki/Instrumentation_in...

    Valves are actuated by an electric motor, hydraulic fluid or air. For air-operated control valves, electrical signals from the control system are converted to an air pressure for the valve actuator in a current/pneumatic I/P converter. Upon loss of pneumatic or hydraulic pressure valves may fail to an open (FO) or fail to a closed (FC) position.