Product Overview

52
Boiler Controls
McDonnell & Miller
Model A B C D
94 6 (152) 7 (178) 10
9
⁄
16
(268) 18
13
⁄
16
(478)
94-A 6 (152) 7 (178) 10
9
⁄
16
(268) 18
13
⁄
16
(478)
• For commercial and industrial low or high pressure
steam boilers
• Maintains consistent water level regardless of pressure
• For boilers of any steaming capacity
• No. 5 Switch included
• Magnetic repulsion eliminates need for bellows
• Optional features
– Manual reset
• 7B switch (135ohm proportional control signal) to
maintain constant boiler water level
– BSPT threads
• 1
1
⁄
4
" NPT connections
• Maximum pressure 250 psi (17.6 kg/cm
2
)
• Ten bolt flange
S
ERIES
94
O rdering Info r m a t i o n
Dimensions, in. (mm)
Model E F G H
94 5
7
⁄
8
(149) 4
11
⁄
16
(119) 8
3
⁄
4
(222) 1 2
1 5
⁄
1 6
( 3 2 8 . 6 )
94-A 5
7
⁄
8
(149) 4
11
⁄
16
(119) 8
3
⁄
4
(222) 1 2
1 5
⁄
1 6
( 3 2 8 . 6 )
Model J K L M N
NPT NPT
94
1
⁄
2
(15) 1
1
⁄
4
1
1
⁄
4
– –
94-A
1
⁄
2
(15) 1
1
⁄
4
1
1
⁄
4
2
1
⁄
16
(52) 1
1
⁄
4
(32)
Model Part Weight
Number Number Description lbs. (kg)
9 4 1 6 5 2 0 0 Combination low water cut-off/ 52.5 (23.8)
pump controller w/No. 5 switch
9 4 - A 1 6 5 5 0 0 94 w/alternate tappings 50.3 (22.8)
9 4 - A M 1 6 5 8 0 0 94-A w/manual reset 50.3 (22.8)
9 4 - A - 7 B 1 6 5 7 0 0 94-AM w/No. 7B switch 52.5 (23.8)
9 4 - M 1 6 5 9 0 0 94 w/manual reset 52.5 (23.8)
9 4 - 7 B 1 6 6 3 0 0 94 w/No. 7B switch 52.0 (23.6)
Series 94
Low Water Cut-Off/Pump Controllers
Electrical Ratings
345 VA at 120 or 240 VAC
L ow Water Cut-Offs – Mech a n i c a l
Combination Low Water Cut-Off/Pump Contro l l e r s for Steam Boilers
06. HotWtrLwco 50-61• 3/6/07 12:44 PM Page 52