Honeywell MP953B Installation And Maintenance Manual Download | Manualshive

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Summary of Contents for MP953B

Page 1: ...the operator from the bonnet installing the operator on the bonnet replacing steam seals changing operator springs replacing the diaphragm replacing the rolling seal and replacing the valve and seat I REMOVING THE PNEUMATIC OPERATOR Many repair procedures require that the operator be removed from the bonnet assembly To remove the operator perform the following steps Refer to Figure 1 see back cove...

Page 2: ...36 36 34 3g 23 37 Ad y p L _ 33 I 14 ...

Page 3: ... groove of the stem adapter 17A b Place the spring 36C on top of the stem adapter 17A and bearing 36B with the longer tabs pointed downward toward the notches in the sides of the bearing c Slide the yoke 36A over the spring 36C bearing 36B and stem adapter 17A until the short tabs of the spring snap into place on both sides of the yoke Center the yoke over the stem 16 l Place the operator over the...

Page 4: ...th spring showing should be toward the valve Carefully guide the seals into place in the bonnet 15 Slide the packing gland 18 over the stem and turn it into the bonnet Tighten the packing gland securely Turn the bonnet assembly 15 into the humidifier cap and tighten securely Install the pneumatic operator in accordance with Section II IV CHANGING OPERATOR SPRlNGS 1 2 3 4 5 6 7 a 9 10 Remove the pn...

Page 5: ... 8 Remove the pneumatic operator in accordance with Section I Perform Section IV CHANGING OPERATOR SPRINGS steps 2 through 8 to disassemble the operator With the operator in the upright position remove the three screws 23 and ring 39 that secure the rolling seal 22 Remove the rolling seal 22 Then separate the cup 37 from the old seal Place the cup 37 into the new rolling seal Install the new seal ...

Page 6: ...Generally the diaphragm is replaced without removing the operator from the humidirier However there are times that the location of the humidifier makes it more convenient to remove the operator to a workbench for repair Remove the six cover screws 31 from the operator cover 33 Lift the cover 33 from the frame 29 Remove the hex nut 34 and washer 32 from the support 24 Do not disturb the yoke assemb...

Page 7: ... Tighten the cover locking screw until it engages the relay housing Do not overtighten OPERATING 1 Set 2 S c TART POINT iDJUSTMENT COVER RANGE ADJUSTMENT r nn LOCKING hlY D SC R E W SCREWS RANGE ADJUSTMENT BLANK 3 SCREWS RELA BODY Fig 3 Adjustment Points of Gradutrol Relay START 3R RANGE AND START POINT MP 953F PILOT POSITIONER the start point on the positioner to the value desired Each click of t...

Page 8: ... Replace the bias spring located on top of the operator e Replace the pilot positioner f Turn on the instrument air ADJUSTMENT CHECK MP 953B AND MP 953F MODELS ONLY 1 Install guages in the main and pilot air lines 2 Main air pressure should be equal to or more than top of sequencing range 13 psi is minimum main pressure for device to function 3 Slowly apply pilot pressure and note the pressure at ...

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