Manualshelf

Replacement Parts List

ManualsBrandsMcdonnell & Miller ManualsHeating Supplies51-S-2-M, Mechanical Water Feeder w/ no. 2 Switch (LWCO Function), w/ Manual Reset
12
43
Boiler Control Replacement Parts
McDonnell & Miller
B
OILER
C
ONTROLS
Series 51/51-2 (continued)
Water Feeder/Low Water Cut-Offs
Combination Mechanical Water Feeder/
Low Water Cut-Offs
Components
3
4
5
7
8
9
10
11
5
1
2
6
Note: One time float and bellows replacement is required when replacing
bellows or float assemblies with date codes before February, 2005 (05B).
Round Boss
Pilot Action Style
Pre August 1995
Hex Boss
Cartridge Style
After August 1995
* Units manufactured prior to August 1995 have a round
port pilot valve and a strainer assembly. These valve
and strainer assemblies can be replaced with the
current hex port cartridge valve and strainer assembly.