Xylem MM 710B Replacement Cam CO 106 (302900) - Manual (Page 2)

A
C
B
D
E
F
G
STEP 3 - Testing
a. Remove the four (4) screws of the No. 2 switch and lift
off the entire mechanism.
b. Remove nut (B), lock washer (C), and eccentric screw
(A), cotter pin (D), and brass pin (E). Then remove the
old cam (F) from the two-piece float arm (G) and discard it.
c. Set new cam (F) in place. Install new brass pin (E),
securing it with a new cotter pin (D). Reinstall the
eccentric screw (A), lock washer (C), and nut (B), but
do not tighten.
Proceed to step d.
d. Using a flathead screwdriver, turn eccentric screw (A) until cam (D) is set in lowest possible position.
e. Reinstall the No. 2 switch and tighten the four (4) screws.
f. Slowly, turn eccentric screw (A) raising the cam (D) until the switch clicks, opening the common and
normally closed contacts. Hold eccentric screw (A) in position and tighten nut (B) on the opposite end.
a. Check to see that the burner turns on and off, by raising and lowering the water level in the boiler.
b. Make sure there is travel in the float arm after the burner goes on and off.
c. Repeat test several times.
For Combination Water Feeder/Low Water Cut-Off with a two-piece float arm (manufactured before 9/98)
A
E
D
C
B
F
G
a. Remove the four (4) screws of the No. 2 switch and lift
off the entire mechanism.
b. Remove nut (B), lock washer (C), and eccentric screw
(A), cotter pin (D), and brass pin (E). Then remove the
old cam (F) from the float arm (G) and discard it.
c. Set new cam (F) in place. Install new brass pin (E),
securing it with a new cotter pin (D). Reinstall the
eccentric screw (A), lock washer (C), and nut (B), but
do not tighten.
Proceed to step d.
For Low Water Cut-Off Series 63
INSTALLATION COMPLETE
Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xyleminc.com/brands/mcdonnellmiller
McDonnell & Miller is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. MM-710B August 2012 Part No. 246777