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Connector cable to transfer signals back-and-forth to the conputer (Which is the PRC = Pressure Recording Controller) [Click on picture to enlarge]
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Circuit connector box. The green and orange thing at the top is the Connector Block (CB-50) [Click on picture to enlarge]
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This is the Variable-Voltage, Variable Frequency (VVVF) power supply for the blower motor. This was donated to UTC by PEC (Process Engineering Company), now a division of Wood's. These are sometimes called "inverters" This is the Pressure Control Drive = PCZ It gets a signal from the PRC and drives the motor with the % of full power as specified by the PRC [Click on picture to enlarge]
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This is the blower motor. It is a 3-phase, 230 volt AC motor. It is 1/2 horsepower.
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This is the Pressure Transmitter = PT It is connected to the ducts with a tube (the light gray tube coming into the top of the black item). The PT is a piezoelectric transducer. It sends a signal voltage out that is proportional to the pressure in the tube. [Click on picture to enlarge]
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This is one of two dampers. They close off one or two fo the three arms of the pressure system that the blower supplies. To see a movie of the damper opearting, click below. [Click on picture to enlarge]
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