Xylem SA25A User Manual

INSTRUCTION MANUAL

McDonnell & Miller No. 25A Make-up Water Feeder

1. Turn off water supply to feeder. Make sure bypass valve is closed. Drain tank so water level is below ﬂoat chamber. Be cautious - drained water and feeder may be hot.

2. Remove four screws (A) and remove valve and strainer assemblies. Move volve and strainer assemblies to a work bench for further disassembly operations.

3. With a socket attachment screwdriver bit, unscrew the valve seat and remove it. Once the valve seat is removed, the valve stem assembly will slide out freely.

4. Clean the valve assembly housing thoroughly.

I-SA25A-15

REVISION B

Installation of New Valve Steam Assembly

5. Insert the new valve stem assembly into the valve housing.

6. Carefully screw the new valve seat into position and tighten securely.

7. Clean strainer.

8. Remove the old gasket and clean the gasket surface on two bolt ﬂange on the strainer and valve housing.

9. Re-assemble strainer assembly to the valve assembly using a new gasket and two screws (B). Tighten screws to secure.

10. Remove the old gasket and clean the gasket surface on the 4 bolt ﬂange surface on the valve assembly housing and head casting.

11. Place the new gasket over the “U” shaped fork mechanism in the head assembly.

12. Position the stem assembly in the vale assembly by looking through the outlet connection so that the “U” shaped fork in the head casting aligns and engages the roller bearing in the center of the stem in the valve assembly.

Align holes in the valve assembly, gasket, and

head casting. Assemble using four screws (A) and secure tightly.

13. Reconnect water supply pipes to inlet of strainer casting and outlet of valve assembly, open water supply valve and close tank drain valve.

14. Check operation of feeder before placing system into operation.

Xylem Inc.

8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379 www.xyleminc.com/brands/mcdonnellmiller

and Valve Seat