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  2. Chevrolet Astro - Wikipedia

    en.wikipedia.org/wiki/Chevrolet_Astro

    The Chevrolet Astro is a minivan that was manufactured and marketed by the Chevrolet division of American auto manufacturer General Motors from 1985 to 2005. Sold alongside the GMC Safari , the Astro was marketed in multiple configurations, including passenger van and cargo van.

  3. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required. Up to a signal voltage of 2.5 Volts (which may vary with different fan/motor manufacturers) the fan will be in a stopped ...

  4. GMC Astro - Wikipedia

    en.wikipedia.org/wiki/GMC_Astro

    The GMC Astro (also known as the Chevrolet Titan) is a heavy-duty cabover truck that was manufactured by the GMC Truck and Coach Division of General Motors from the 1969 to 1987 model years. Succeeding the F/D-series "Crackerbox" cabovers, the Astro was marketed by Chevrolet as the Titan, serving as the largest cabover truck ever produced by ...

  5. Chevrolet Series M Copper-Cooled - Wikipedia

    en.wikipedia.org/wiki/Chevrolet_Series_M_Copper...

    The fan would turn at one and a half times the speed of the engine pulling air through a vent from the bottom of the engine manifold. This design scheme allowed for bottom end cooling which was more efficient and easier to control, while the air flow was reverse-flow instead of cross-flow to minimize exhaust air from being recycled back into ...

  6. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  7. Voltage controller - Wikipedia

    en.wikipedia.org/wiki/Voltage_controller

    A Voltage controller thyristor based dimmer rack An electrical schematic for a typical SCR-based light dimmer. A voltage controller, also called an AC voltage controller or AC regulator is an electronic module based on either thyristors, triodes for alternating current, silicon-controlled rectifiers or insulated-gate bipolar transistors, which converts a fixed voltage, fixed frequency ...