Submittal Sheet

Boiler Controls

McDonnell & Miller

• For residential, commercial, and industrial boiler

applications of any steaming capacity

• Heavy duty

• 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

•2

⁄2" NPT side tapping provided for installation with close

nipple

• Maximum boiler pressure 50 psi (3.5 kg/cm

)

Series 764

CUT OFF

LEVEL

Low Water Cut-Offs – Mechanical

For Steam and Hot Water Boilers

Series 764

Low Water Cut-Offs

Ordering Information

Dimensions, in. (mm)

Model Part Weight

Number Number Description lbs. (kg)

764 144500 Low water cut-off 12.5 (5.7)

Electrical Ratings

ABCD

NPT

⁄8 (175) 6

⁄2 (165) 3

⁄8 (79) 2

⁄2

Motor Switch Rating (Amperes)

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 41

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04_LWCOpgs 27-41 COLLECT 3/6/07 6:29 PM Page 41 Boiler Controls McDonnell & Miller Low Water Cut-Offs – Mechanical For Steam and Hot Water Boilers Series 764 ® Low Water Cut-Offs ® • For residential, commercial, and industrial boiler applications of any steaming capacity • Heavy duty • Adjustable BX outlet for easy installation CUT OFF LEVEL B • Dual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder C D • 21⁄2" NPT side tapping provided for