Johnson Controls York OptiView YK G Series, Эксплуатация и обслуживание

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Description of system and fundamentals of
operation
System operation description
The YORK Model YK Chiller is commonly applied to large air conditioning systems, but can be used
on other applications. The chiller consists of an open motor mounted to a compressor with integral
speed increasing gears, condenser, evaporator and variable flow control.
The chiller is controlled by a modern state of the art microcomputer control center that monitors its
operation. The control center is programmed by the operator to suit job specifications. Automatic
timed start-ups and shutdowns are also programmable to suit nighttime, weekends, and holidays.
The operating status, temperatures, pressures, and other information pertinent to operation of the
chiller are automatically displayed and read on a graphic display. Other displays can be observed by
pressing the keys as labeled on the control center. The chiller with the OptiView™ control center is
compatible with an electromechanical starter, YORK Solid State Starter (optional), or VSD (variable
speed drive (optional)).
In operation, a liquid (water or brine to be chilled) flows through the evaporator, where boiling
refrigerant absorbs heat from the liquid. The chilled liquid is then piped to fan coil units or other air
conditioning terminal units, where it flows through finned coils, absorbing heat from the air. The
warmed liquid is then returned to the chiller to complete the chilled liquid circuit.
Figure 1: Model YK chiller
Model YK Style G R-134a or R-513A 8