Xylem MM 235E Replacement Snap Switch Assembly SWA 150S 150S MD 158S 159S - Manual (Page 2)

For Model
Repl. Switch
Model & Part No.
150S
150S-B
150S-M*
150S-B-M*
150S-M-MD*
150S-B-M-MD*
157S
157S-A
157S-P
157S-R
157S-RL
157S-M*
157S-A-M*
157S-R-M*
157S-RB-M*
157S-RL-M*
157S-M-MD*
157S-M-RB-P-MD*
150S-MD
150S-B-MD
157S-MD
157S-P-MD
157S-R-MD
157S-RB-MD
157S-RB-P-MD
157S-RD-MD
157S-RLS-MD
158S
158S-M*
158S-M-MD*
159S
SWA-150S
310462
SWA-150S-MD
310464
SWA-158S
310468
SWA-159S
310470
2
Verify that you have the Correct Replacement Switch Assembly Model
IMPORTANT:
• Installation of an incorrect switch assembly could cause damage to the boiler and/or boiler system.
• Modification of the switch assembly before or after installation could cause damage to the boiler
and/or boiler system.
• Series 150S and 157S Replacement Snap Switch Assemblies are not interchangeable with Series 150 and 157 mercury
switch controls.
• Replacement Switch Assemblies are not interchangeable and must be selected and ordered for the specific control
model in which it will be installed.
Model SWA-150S
P/N 310462
Model SWA-159S
P/N 310470
September 2003 (03J)
and Older
NOTE: Models with (*) will require head replacement
if manufactured before September 2003 (03J)
October 2003 (03K)
and Newer
Model SWA-158S
P/N 310468
Model SWA-150S-MD
P/N 310464
Manual Reset Models