Emerson Fluid Chiller Guía para resolver problemas descargar pdf (Pagina 60)

Basic Rules of Good Practice Emerson Climate Technologies

DON’Ts

DON’T be a “parts-changer.”

Analyze problems based on the symptoms, and determine the specic cause be-

fore making any changes or repairs. Emerson’s Troubleshooting Guide describes

a wide variety of problems that may be encountered, and their probable causes.

DON’T think of a TXV as a temperature or pressure control.

Thinking of it as a superheat control is basic to achieving optimum system perfor-

mance.

DON’T attempt to use any control for any application other than the one it

was designed for.

Using a pressure regulator for a pressure relief valve, or any similar substitution,

is not good practice and almost certainly won’t deliver proper performance. Mis-

applications can lead to equipment damage and even injury. When doubt exists,

check with the manufacturer.

DON’T energize a solenoid coil while it is removed from the valve.

Without the magnetic effect of the solenoid core, the coil will burn out in a matter

of seconds.

DON’T install a previously used lter drier or replaceable cartridge.

It could introduce contaminants that it has picked up since its removal from a

system.

DON’T select solenoid valves by line size or port size, but by valve capacity.

They must also be compatible with the intended application with regard to the

specic refrigerant used, the maximum opening pressure differential (MOPD), the

maximum working pressure (MWP), and the electrical characteristics. Never ap-

ply a valve outside of its design limits or for uses not specically catalogued.

DON’T rely on sight or touch for temperature measurements.

Use an accurate thermometer. Once again, you can’t get accurate diagnoses

with faulty inputs.

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Emerson Fluid Chiller Guía para resolver problemas Pagina 60