Honeywell MO953 Series, Service Data

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Page 3: ...GENERAL proportionally control steam or hot and cold liquids in HVAC systems SPECIFICATIONS MODELS MP953A Direct acting with Gradutrol Relay MP953B Reverse acting with Gradutrol Relay MP953C Direct acting without positioner MP953D Reverse acting without positioner MP953E Direct acting with positive positioner MP953F Reverse acting with positive positioner MAXIMUM SAFE AIR PRESSURE 25 psi 172 kPa S...

Page 4: ...1 C8XH 13 330 I l l 2 38 C l 4 8 9 Cl133 Cl489 C8XL Cl554 Cl554 C l 5 6 2 C l 5 6 2 314 19 7 118 181 D1206 D1206t D1214 D1214t D1222 D1222 D1230 D1248 D1255 El301 El319 Direct acting with positive positioner l 112 38 El327 El277 El285 El293 8 203 El368 El376 El384 1 K 38 El392 El400 13 330 3 330 El418 El427 I I I El435 El443 I I I Reverse acting F1119 7 180 with positive FllOl wsitioner F1093 10 6...

Page 5: ...9 0 to 30 psi 0 to 207 kPa Wrench 301572A for MP953A and B VISUAL INSPECTION Check periodically for leaks loose fittings and other visible problems CLEANING Clean the Actuator with a commercial cleaning solvent or degreaser A WARNING A Careless handling of solvents can cause permanent respiratory or skin damage Avoid prolonged exposure to solvents OPERATIONAL CHECK 2 Vary the branchline pilot pres...

Page 6: ...AIR ADJUST START POINT MP953A B RANGE ADJUSTMENT SCREWS BLANK 3 START POINT ADJUSTMENT E ADJUSTMENT M IUM PLATED RANGE ADJUSTMENT INSTRUCTIONS SHOWN HERE RELA i BODY 8817 I Fig 2 Adjustment Points of M0953 MP953A and B Gradutrol Relay Reinstall setpoint knob Tighten knob by turning it until it is seated on relay body Fig 2 Loosen knob maximum of one turn until start point of correct scale range li...

Page 7: ...OUNTED AND STEM EU lTON IS PROPERLY LATCHED NO f PRESSURETO A DOES RANGE VALUE LOOSEN POSiTlONER SETPOINT COVER SLOWLY TURN COVER SCALE TO BELOWZERO START POINT ADJUST POSITIONER START POINT DIALTO MINIMUM VALUE I RECAUBRATE POSITIONER START POINT IF NECESSARY NO Y REMOVE ANY FOREIGN MATERIAL AND OR REPAIR DISC SEAT AND STEM AND OR REPACK VALVE Fig 3 Troubleshooting Flowchart for MP953A B E F with...

Page 8: ...FOR COMPLETE REPLACE ACTUATOR DIAPHRAGM AND OR SLEEVE S EM MOVE REMOVE ANY FOREIGN MATERIAL AND OR REPAIR DISC SEAT AND STEM AND OR REPACK VALVE ACTUATOR IS OK RESTORE SYSTEM TO SERVICE Fig 4 Troubleshooting Flowchart for MP953C D without Gradutrol Relay Positioner 75 5500 ...

Page 9: ...8 in 67 mm Narrow jaw pipe wrench or large adjustable pliers may be substituted as long as they do not distort the setpoint knob Removing MP953E positive positioner Adjustable crescent wrench with jaw opening to at least 2 5 8 in 67 mm Table 3 Removing and Replacing Actuator Bases 5 16 in hex socket Removing hJP953B Gradutrol Relay positioner bracket assembly Removing MP953F positive positioner br...

Page 10: ... TO AU RELAYS PARTS BELOW COMMON TO ALL RELAYS VALVE UNIT CUP ASSY START POlNT SPRING A 1 THE 313711A AND D MODELS HAVE DUAL BARBED CONNECTORS THE 3137118 AND C MODELS USE PlPt THREAD CONNECTION THE 313711A AND 8 MODELS HAVE DUAL SCALE ENGLISH AND METRIC THE 313711C AND D MODELS HAVE ENGLISH 5 32c 2 75 5500 Fig 5 Gradutrol Relay Assemblies Exploded View 8 ...

Page 11: ...53A C E DIRECT ACTING ACTUATORS Direct acting Actuators are subject to extremely high internal spring loads Therefore Actuator covers must be removed very carefully before the the main diaphragm can be replaced When using the following procedures see Figures 8 and 10 for exploded diagrams and Tables 6 and 8 for parts REMOVE ACTUATOR COVER A WARNING A Use extreme caution when disassembling Actuator...

Page 12: ...02 for all Actuators Parts are rated at 250F 121C When using the following procedure see Figures 9 and 11 for exploded diagrams and Tables 7 and 9 for parts Disconnect all air lines including any connected to Gradutrol Relay or positive positioner if present Remove cover screws cover on MP953B and F Relay positioner remains attached to cover feedback spring MP953B F large nut lockwasher cup and di...

Page 13: ... diagram and Table 6 for parts To prevent damage to the MP953E wrench force must only 1 2 Disconnect all air lines Unscrew Relay positioner counterclockwise from Actuator cover and remove l 5 When replacing Gradutrol Relay with a new style positive positioner discard original spring and install feedback spring with proper range from appropriate retrofit kit For part number see POSITIONER RETROFIT ...

Page 14: ... service plate and reinstall positioner 6 Reconnect tubing and restore system to service INSTALL STEM ANTISPIN FEATURE GENERAL A valve stem MP953A C E will not spin when it is locked to the Actuator The antispin feature is built into 13 inch MP953A C and E and can be added to the 5 and 8inch MP953A C and E Adding the antispin feature involves modifying the latching mechanism in the Actuator then r...

Page 15: ...igures 8 through 11 show exploded diagrams of M0953A D and MP953A F Actuators Tables 6 through 11 list parts shown in the figures 24076 Fig 8 MO MP953A and MP953E Exploded View Fig 9 MO MP953B and MP953F Exploded View 13 75 5500 ...

Page 16: ... Replace with l 4 20 x 5 8 in can head machine screw 2 for 5 in models Replace with 5 16 18 x I l 4 in cap head machine screw 2 for g in models Replace with 5 16 18 x l 314 in cap head machine screw 2 for 13 in models 3 4 in stroke Rentace with 3 8 16 x I 112 in can head machine screw 2 for 13 in models I l 2 in stroke Base screw 2 l 4 20 x 314 in for 5 m models Basescrew 2 l 2 13 x i 1 2 in for g...

Page 17: ... in 314420 01508 Bias spring for Gradutrol Relay 140040 15 00 1 Bias spring for positive positioner I I I Y L L 8 Obtain locally Hex head screw 6 10 24 x 3 4 in 9 14004665 00 1 Cover casting stamped 14004660 001 10 313918 00064 Feedback spring for l 2 in stroke MP953B see NOTE 1 313919 00063 Feedback spring for all other MP953Bs see NOTE 1 11 3 12205 12 304733 v Nut Lockwasher 13 312199 CUP 14 140...

Page 18: ...24078 Fig 10 MOjMP953C Exploded View Y 24079 Fig 11 MO MP9531 Exploded View_ 75 5500 PUC 9 90 16 ...

Page 19: ...or 13 in model 8 9 10 See Table 10 Mainspring 3 10665 00062 Ring for 5 in model 14004613 001 Frame for 5 in model includes screws 14004611 001 Frame for 8 in model includes screws 11 312101 Frame for 13 in model 14004577 001 Base for 5 in model includes screws 311744 Base for 8 in model 14004698 001 1 Base for 13 in model 3 4 in stroke 312099 Base for 13 in model l l 2 in stroke 12 Obtain locally ...

Page 20: ... Assembly with helicoil insert see detail in Fig 7 3 1465 1A Yoke Assembly for Support Assembly with nylon insert see detail in Fig 7 14004298 003 Socket cap base screw 2 l 4 20 x l 3 4 in 20 1 Obtain locally 1 Replace with l 4 20 x 5 8 in cap head machine screw NOTE 1 Diaphragm and Sleeve Seal available in Kit 14003124 002 Table 10 MP953C Mainsprings B Actuator Stroke D i a m e t e r I n Pressure...

Page 21: ...Fig 14 14004214 001 For 5 in 127 mm 3 4 in 19 mm stroke valve actuators Fig 13 I Positioner has cream colored lower plate Table 13 MP953 Feedback Spring Kits Part No Description 1400421 l 001 For 3 4 in 19 mm stroke DA vahs 14004212 001 For l l in 38 mm stroke DA 14004213 001 I All kits include springs with 3 5 and lo psi 21 For RA valve actuators includes bias 34 and 69 kPa range spfiw Includes c...

Page 22: ...04211 001 O RING 312602 GREEN 10 PSI 69 KPA GRAY 5 PSI 34 KPA RED 3 PSI 21 KPA FEEDBACK SPRING KIT 14004212 001 _ R2719 1 Fig 13 Positive Positioner Retrofit Kits 14004139 001 and 14004214 001 3 4 in stroke R27151 Fig 14 Positive Positioner Retrofit Kit 14QO4 140 001 l 1 2 in stroke 75 5500 20 ...

Page 23: ...TS MP953C TO V053 VO55 OR V056 FOR COMPLETE CROSS REFERENCE iNFORMATION ON VALVES 13 IN 330 MM DIA 314 IN 19 MM STROKE 1400d722 001 SEE 95 5579 13 IN 330 MM DIA l 112 IN 38 MM STROKE 316036A 12 EXTENSION Cb Q SETSCREW 312518 00062 l 4 28 X 114 IN 31 BUTTON 0503 00062 ACTUATOR STEM AND SETSCREW 13 IN MODEL l 1 2 IN STROKE I I CORRCSION RESISTANT SPRAY MSC 3858 Fig 15 MP953 Accessories 8825 2 21 754...

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