Xylem McDonnell & Miller SA47-4 Instruction Manual

fl'/V} McDonnell & Miller
V
a xylem brand
Replacement Instructions For Large Bellows Assembly
Part Nos. SA47-4 (341500) and SA47-104 (341900)
A
This product can expose you to chemicals including Lead, which is known to the
State o f Cali f ornia to cause cancer and birth de f ects or other reproductive harm.
For more in f ormation go to: www.P65Warnings.ca.gov.
UPPER BODY
CASTING
BODY GASKET
To Remove Large Bellows Assembly
1.
Disconnect electric power to No. 2 Switch. If control
is eauipped·· ,v ith a switch. remcve !our screws (G}
and lift switch from control with wiring in place.
2. Close off water supply valve (L) and valve M (See
Diagram on other side).With boiler cold, release
1
boiler pressure and remove cold water piping from
"IN" and "OUT" tappings.
Drain water from boiler to a level below the lower
3.
gauge glass connection.
4.
If control has blow-off valve on bottom of float
chamber (see illustration). open this valve and
drain water remaining in control and disconnect
blow-off piping.
5. Break unions (H) and (I) or equalizing pipe con­
nections to float chamber then remove control from
boiler.
All Work Must be Performed by Qualified Personnel
(Please read all instructions carefully before starting work)
,---- - ►
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X;----...::�
O
FLOAT
INSTRUCTION MANUAL
VALVE & STRAINER
ASSEMBLY
�r---- STRAINER BASKEl
.
. .
6.
Remove large black ·y assembly (if so equipped).
7.
Mark two castings of float chamber ai flange so
both can be reassembled in correct position.
8. Remove eight cap screws (j) and separate two
float chamber castings.
9.
Remove float nut (V} and unscrew float (0) from
float arm (T).
10. With long nose pliers remove cotter pin (A) and
linkage pin (B) through opening.
Take out four screws (P) and remove valve bracket
11.
(0) from upper body casting (R). NOTE: Do not
loosen or remove screws (C) holding valve bracket
(0) to valve and strainer assembly.
Remove large bellows assembly from upper body
12.
casting (R).
MM-319
REVISION C
ASSEMBLY