Overview of Primary Product
38
Boiler Controls
McDonnell & Miller
Boiler Controls
• For residential and commercial low pressure steam
boiler applications
• For boilers of any steaming capacity
• Adjustable BX outlet for easy installation
• Dual precision switches for dependable operation of the
low water cut-off and alarm or electric water feeder
• Packless bellows
• 1" NPT equalizing pipes and blow down valve required
• Maximum steam pressure 20 psi (1.4 kg/cm
2
)
Series 61
G
A
B
F
D
E
CUT-OFF
LEVEL
C
Low Water Cut-Offs – Mechanical
For Steam Boilers
Series 61
Low Water Cut-Offs
Ordering Information
Electrical Ratings
Dimensions, in. (mm)
Model Part Weight
Number Number Description lbs. (kg)
61 140100 Low water cut-off 13.5 (6.1)
ABCDEFG
NPT NPT
9
15
⁄16 (252) 7
7
⁄16 (189) 1 1 6
1
⁄2 (165) 3
1
⁄8 (79) 5
1
⁄8 (130)
Motor Switch Rating (Amperes)
120 VDC .3 Amp, 240 VDC .15 Amp
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 7.4 44.4
125 VA at 120
240 VAC 3.7 22.2
or 240 VAC
®
®
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