Product Overview

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

)

Series 61

CUT-OFF

LEVEL

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

⁄16 (252) 7

⁄16 (189) 1 1 6

⁄2 (165) 3

⁄8 (79) 5

⁄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

04_LWCOpgs 27-41 COLLECT 3/6/07 6:29 PM Page 38

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04_LWCOpgs 27-41 COLLECT 3/6/07 6:29 PM Page 38 Boiler Controls McDonnell & Miller Low Water Cut-Offs – Mechanical For Steam Boilers Series 61 ® Low Water Cut-Offs ® • For residential and commercial low pressure steam boiler applications • For boilers of any steaming capacity A • Adjustable BX outlet for easy installation C B Boiler Controls • Dual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder E G CUT-OFF LEVEL F • Packless bello