Honeywell MP-953D Installation And Maintenance Manual
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- Engineering manual (228 pages) ,
- Product data (4 pages) ,
- Service data (24 pages)
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Installation and Maintenance
REPAIR AND ADJUSTMENT PROCEDURES FOR HONEYWELL MP-953B, MP-953D,
OR MP-953F PNEUMATIC OPERATORS USED ON ARMSTRONG HUMIDIFIERS
This bulletin should be used by experienced personnel as a
guide to the repair and adjustment of Honeywell MP-953B, MP-953D,
or MP-953F pneumatic operators for Armstrong humidifiers.
Selection or installation of equipment should always be
accompanied by competent technical assistance.
to contact Armstrong or its local representative if further
information is required.
WARNING:
BE SURE THAT STEAM SUPPLY VALVE FOR THE HUMIDIFIER IS
OPERATOR.
Maintenance procedures for the Honeywell pneumatic operator
include:
removing 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.
REMOVING THE PNEUMATIC OPERATOR
I.
Many repair procedures require that the operator be removed
from the bonnet assembly.
the following steps.
locate the parts by item numbers.
Turn oft steam to the humidifier.
1.
Turn off the instrument air and disconnect the line
2.
from the operator.
Loosen the two set screws (27) on both sides of tne
3.
operator base (26).
Remove operator plug (35) from the MP-953D, or open the
4.
access plate on the MP-953B or MP-953F.
Insert a screwdriver into the slot at the top of the
5.
yoke assembly (36).
screwdriver
disengages from the operator.
Lift the operator from the bonnet.
6.
(See Figure 1 on back cover.)
To remove the operator, perform
Refer to Figure 1 (see back cover) to
Hold the operator and turn
clockwise until the yoke assembly
IB-52
We encourage you
Related Manuals for Honeywell MP-953D
Summary of Contents for Honeywell MP-953D
- Page 1 OR MP-953F PNEUMATIC OPERATORS USED ON ARMSTRONG HUMIDIFIERS This bulletin should be used by experienced personnel as a guide to the repair and adjustment of Honeywell MP-953B, MP-953D, or MP-953F pneumatic operators for Armstrong humidifiers. Selection or installation of equipment should always be We encourage you accompanied by competent technical assistance.
- Page 3 AND ADJUSTMENT PROCEDURES FOR HONEYWELL MP-953B, MP-953D, OR MP-953F PNEUMATIC OPERATORS USED ON ARNSTRONG HUMIDIFIERS INSTALLING THE PNEUMATIC OPERATOR After necessary repairs have been made, perform the following steps to install the operator. Press down the valve stem (16) so...
- Page 4 REPRAIR AND ADJUSTMENT PRC%EDURES FOR HONEYWELL MP-953B, M%-95iD, OR MP-953P PNEUMATIC OPERATORS USED ON ARMSTRONG HUHIDIFIERS REPLACING STEM SEALS There are stem seals in the bonnet assembly to prevent steam leaks around the stem. The following steps should be followed if these seals need to be replaced.
- Page 5 OR MP-953F PNEUMATIC OPERATORS USED ON ARMSTRONG HUMIDIFIERS Place the operator base (26)' onto the frame (29), and secure it in place with screws (25). Invert the operator back to its upright position. Place the diaphragm (21) and follower (38) into the frame (29).
-
Page 6: Changing The Diaphragm
OR MP-953F PNEUMATIC OPERATORS USED ON ARMSTRONG HUMIDIFIERS Using a socket wrench, remove the old valve seat (14 from the humidifier cap. Install a new valve seat in its place. the yoke assembly (36), from the stem (16). Remove Remove the old valve and stem assembly (16) from the bonnet, and replace with a new valve and stem assembly. - Page 7 MP-953F PNEUMATIC.OPERATORS USED ON ARMSTRONG HUMIDIFIERS VIII.OPERATING RANGE AND START POINT - MP-953B (See Figure 3) Using a wrench (Honeywell Part No. 301572A supplied with gradutrol), loosen the cover locking screw. Unscrew the start point adjustment knob and make adjustments according to the directions printed inside...
- Page 8 MP-953P PNEUMATIC OPERATORS USED ON ARMSTRONG HUMIDIFIERS Feedback springs are available in a kit containing: 1 - Bronze feedback spring, operating range 5 psi 1 - Violet feedback spring, operating range 10 psi To change the feedback spring: Turn off the instrument air. Remove the pilot positioner by removing the two Do not remove the pneumatic tubing.