By C. L. Dunlop (Auth.)
This guide goals to be a advisor to deliberate preventative upkeep engineering and includes step by step directions and suggestion for the set up and tracking of plant reliability. guidance are laid down in an available layout including movement diagrams and documentation, and plenty of pattern types are supplied. those can simply be tailored to fit a upkeep engineer's wishes, and are fairly invaluable for the set up of a brand new process. the writer is a upkeep supervisor and has labored as a plant engineer in a large choice of method industries, either in Europe and the center East
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Additional info for A Practical Guide to Maintenance Engineering
8> Check for signs of rust. ( 9) Check and inspect for dirt and dust on external terminals, relay box, internal unit and drawer mechanism. (10) Inspect for cracked molding, check the external terminals, tap plate and plugs for cracked moldings. T. circuit for overcurrent. Clean and lubricate as necessary. INSTRUCTION PREPARED MANUFACTURER INSTALLED 55 MAINTENANCE TYPE OF TROUBLE SHOOTING PAGE 3M 1 of 14 GUIDE EQUIPMENT NO EQUIPMENT j ' I DEFECT SYMPTOM Heavy Duty R e f r i g e r a t i o n POSSIBLE CAUSE Compressor REQUIRED ACTION J i j Compressor w i l l n o t start Check main s w i t c h , f u s e , Power off Control power/control a i r Leaving gas t e m p e r a t u r e s e t too h i g h !
Input to single terminal (measure from the primary, secondary and terminal sides). Set 30% of setting valve current + 8% Check Ration characteristic. Measure diffenential current as follows:- (A) Setting valve (differential current) actual valve. (B) Measure at 500% and 100% of outgoing current. Differential current l2 = 500% of setting valve current x 500% + 10% at 500% of outgoing current ~~ 1(3) Check Operating valve of overcurrent element as follows:(A) Measure operating current setting valve: (B) Input to single terminals.
GUIDE EQUIPMENT 3M E Q U I P M E N T NO Heavy Duty Refrigeration Compressor DEFECT SYMPTOM High discharge SPECIAL DATE INSTRUCTIONS PRFPARFD 4 of 14 POSSIBLE CAUSE REQUIRED ACTION Air in the system Purge air. High expansion valve superheat Reset expansion valves. AREA LOCATION 59 MAINTENANCE TYPE OF TROUBLE SHOOTING PAGE 3 M 5 of 14 GUIDE EQUIPMENT EQUIPMENT NO Heavy Duty Refrigeration Compressor 1 DEFECT SYMPTOM System noises POSSIBLE CAUSE REQUIRED ACTION Loose or mis-aligned coupling Check alignment and tightness.