Product Overview

58
Boiler Controls
McDonnell & Miller
• For steam and hot water boilers with cold water feed
• Continuous maintenance of minimum safe water level,
independent of electrical service
• Proportional feed action
• Quick-change replaceable cartridge valve and strainer
• Quiet, durable operation
• Isolated feed valve minimizes lime and scale build-up
• Optional features
– No. 2 switch
– Manual reset
• Model 247 can be field upgraded with a No. 2 switch to
add low water cut-off function
• Maximum water supply pressure 150 psi (10.5 kg/cm
2
)
• Maximum inlet water temperature 120˚F (49˚C)
• Maximum vessel pressure 30 psi (2.1 kg/cm
2
)
Series 247
Series 247-2
Water Feeders – Mech a n i c a l
Series 247/247-2
Mechanical Water Feeders/Low Water Cut-Offs
Dimensions, in. (mm)
A B C D E F G H J K
NPT NPT
6
1
⁄
2
(165) 1 9
1
⁄
8
(232) 5
1
⁄
8
(130) 4
5
⁄
8
(117) 2
5
⁄
8
(67) 7
5
⁄
16
(186)
1
⁄
2
1
13
⁄
32
(35.7) 1
29
⁄
32
(48.4)
Electrical Ratings
Motor Switch Rating (Amperes)
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 10.2 61.2
125 VA at
240 VAC 5.1 30.6
120 or 240 VAC
60 Hz
06. HotWtrLwco 50-61• 3/6/07 12:44 PM Page 58