Parker A4W Series Installation, Service And Parts Information Download | Manualshive

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Refrigerating Specialties Division

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Fig. 8

Fig. 9 - S6A Pilot

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Summary of Contents for A4W Series

Page 1: ...rouble Shooting 9 Warning 14 Warranty 14 BULLETIN 23 20D A4W Series August 2007 Installation Service and Parts Information Description These heavy duty cast steel bodied ASTIM No A352 Grade LCB pressu...

Page 2: ...gauge port Back the Adjusting Stem all of the way out to stop counterclockwise This will reduce the set point to its lowest level and will cause the valve to OPEN wide Start the system and when the va...

Page 3: ...frequently is used in the wide open mode when maximum refrigeration capacity from an evaporator is required During the defrost of the evaporator the regulator pilot solenoid is de energized thus funct...

Page 4: ...imum system performance To adjust the pressure regulator disconnect the air line and follow the instructions above listed for the Type A4W This setting represents the lowest inlet pressure the regulat...

Page 5: ...gauge installed on the regulator can be seen Avoid locations where the valve may be damaged by personnel traf c material handling or other equipment Before installing the valve check to see that all...

Page 6: ...l bar approximately 10mm x 50mm 3 8 x 2 x 50 2 longer than the diameter of the piston bore Drill a hole in the center of the at face that will clear the 1 4 20 screw Obtain a 1 4 20 machine screw with...

Page 7: ...talled bowed toward the Diaphragm Follower 47 and Range Spring 49 That is the center of the Diaphragm is higher than its perimeter Before installing the Bonnet 51 be sure that the Adjusting Stem 52 is...

Page 8: ...rbon systems Before deciding to disassemble a regulator for servicing the following investigations should be made Check the Manual Opening Stem it should be turned out counterclockwise for automatic o...

Page 9: ...in parallel Check with factory Pressure drop across Inlet or outlet restricted Check for restriction regulator too high Clean strainer Regulator too small Replace with properly sized regulator High pr...

Page 10: ...Pilot Range V Not A4WOE 202004 44 Seat Pilot 1 Diaphragm Kit 200770 1 Seat Kit Pilot Range D Not A4WOE 202003 44 Seat Pilot 1 Diaphragm Kit 200771 1 Bolt Package A4W Bonnet 202246 58 Bolts 5 16 18 x...

Page 11: ...Refrigerating Specialties Division 11 Fig 8 Fig 9 S6A Pilot...

Page 12: ...Refrigerating Specialties Division 12 Fig 12 A4W A4WE A4WP A4WL A4WOE A4WR A4WB A4WS For All Sizes e is 75mm 3 0 in f is 100mm 4 0 in g is 140mm 5 5 in A4WD...

Page 13: ...17 25 A4WP A4WL mm 438 318 In 17 25 12 5 A4WOE mm 463 305 In 18 25 12 0 A4WR mm 414 305 In 16 25 12 0 A4WB A4WS mm 476 451 In 18 75 17 75 A4WD mm 502 476 In 19 75 18 75 mm 150 Common to All mm 152 48...

Page 14: ...ervicing work Where cold refrigerant liquid lines are used it is necessary that certain precautions be taken to avoid damage which could result from liquid expansion Temperature increase in a piping s...

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