Product Overview

56
Boiler Controls
McDonnell & Miller
H J K L M N P
NPT
7
5
⁄
16
(186) 4
5
⁄
8
(117)
1
⁄
2
1
29
⁄
32
(58.4) 1
13
⁄
32
(35.7) 3 (76) 5
5
⁄
16
(135)
A B C D E F G
NPT
11
7
⁄
8
(302) 5
1
⁄
4
(133) 7
3
⁄
8
(187) min. 2
5
⁄
8
(67)
3
⁄
4
5
1
⁄
8
(130) 10
5
⁄
8
(270)
14 (356) max.
• 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 hook-up fittings provided
• Quick-change replaceable cartridge valve and strainer
• Optional features
– No. 2 switch
– Manual reset
• Model 47 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 boiler pressure 25 psi (1.8 kg/cm
2
)
Series 47
Series 47-2
Water Feeders – Mech a n i c a l
Series 47/47-2
M e c hanical Water Feeders / L o w Water Cut-Offs
Dimensions, in. (mm)
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 56