Page 5: Thermostatic Fan Control, 2-Pipe System With Safety Cycle Thermostatic Fan Control, 2-Pipe System with Safety Cycle — This control is used for high humidity situations in which condensate problems can occur if fan is turned off while chilled water is still running through the coil.
You can run chilled water late into the fall, turn it on early in the spring and still have heat available to all units when- ever required.
It is there- fore possible, just as with 4-pipe systems, to have heating or cooling at any time of the year. Both hot water and chilled water are avail- able at any time. Normally an automatic changeover thermostat is used, but a manual changeover thermostat is also suitable.
Heating and cooling are now available on an indi- vidual basis throughout the year with a 2-pipe system. Some of the options common with the 3-speed switch are: 1.
Scale is marked warmer- cooler. Thermostat mounts in 4-in. The standard temperature range is 60 - 90 F. Same End Connection 2 Pipe or 4 Pipe — There are limitations on physical size of pneumatic valves, quantity and type of matching components, required control interface.
A product detector and balanced product modulator are essentially the same circuit. Determine Q. Calculate the range of oscillator frequencies and the range of image frequencies. Which is more sensitive? What is the strongest signal that can be present along with a 0. Assume that the input filter consist of one tuned circuit with a Q of Calculate the LO frequency and the image frequency.
Calculate the following if the receiver employs low tracking: a LO frequencies, b frequencies after using the first mixer, c output of the 2nd mixer, d image frequency.
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Make sure that properly sized disconnecting and safety switches are The installation must be carried out by a qualified installer. Page General Information Choose an area free from obstructions which may cause irregular air requiremements. If the product is supplied without a Carrier control device, verification Check that the wall surface is flat enough to allow easy and safe of EMC conformity is the responsibility of the installer. Page Installation NOTE 1: On units with valves already installed, reversal of the coil can be made by ordering the corresponding valve kit.
For further details on electrical such that total disconnection can be ensured under the conditions connections of the above-mentioned units refer to the additional provided for by overvoltage class III. Page 22 In this last mode, fan coil operation is driven by the control, in cooling or heating, depending on the temperature read by the sensor.
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