Product Overview
Model A B C D E F G H J K
NPT NPT NPT NPT NPT NPT NPT NPT NPT NPT
194 1
1
⁄
4
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
– –
1
⁄
2
3
⁄
4
194-A 1
1
⁄
4
1
⁄
2
1
⁄
2
1
⁄
2
– –
1
⁄
2
1
⁄
2
1
⁄
2
3
⁄
4
194-B 1
1
⁄
4
3
⁄
4
3
⁄
4
3
⁄
4
– –
3
⁄
4
3
⁄
4
1
⁄
2
3
⁄
4
Model T U V W X Y
194 17
1
⁄
4
(438) 20
1
⁄
2
(521) 3 (76) 3 (76) 6 (152) 10
13
⁄
16
(274)
194-A 17
1
⁄4
(438) 20
1
⁄2
(521) 3 (76) 3 (76) 6 (152) 10
13
⁄16
(274)
194-B 17
1
⁄
4
(438) 20
1
⁄
2
(521) 3 (76) 3 (76) 6 (152) 10
13
⁄
16
(274)
Model L M N P Q R S
194 – 11
5
⁄
8
(295) 6
3
⁄
4
(171.4) 13
1
⁄
16
(332) 2
13
⁄
16
(71) 1
1
⁄
4
(32) 2
3
⁄
8
(60)
194-A 12
7
⁄
8
(327) – 6
3
⁄
4
(171.4) 13
1
⁄
16
(332) 2
13
⁄
16
(71) 1
1
⁄
4
(32) 2
3
⁄
8
(60)
194-B 12
7
⁄
8
(327) – 6
3
⁄
4
(171.4) 13
1
⁄
16
(332) 2
13
⁄
16
(71) 1
1
⁄
4
(32) 2
3
⁄
8
(60)
• For commercial, and industrial low or high pressure
steam boilers
• Maintains consistent water level regardless of pressure
• For boilers of any steaming capacity
• Water column with integral tappings for gauge glass and
tri-cock installations
• No. 5 Switch included
• Magnetic repulsion eliminates need for bellows
• Optional features
– Manual reset
–7B switch proportional 0-135 ohm control to maintain
constant boiler water level
• 1
1
⁄
4
" NPT connections
• Maximum pressure 250 psi (17.6 kg/cm
2
)
• Ten bolt flange
S
ERIES
194
L o w 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
O r dering Info r m a t i o n
Model Part Weight
Number Number Description lbs. (kg)
1 9 4 1 6 6 6 0 0 Combination low water cut-off/ 72.0 (32.7)
pump controller w/Series 5 switch
1 9 4 - A 1 6 6 7 0 0 194 w/alternate tappings 72.0 (32.7)
1 9 4 - A - 7 B 1 6 7 1 0 0 194-A w/Series 7B switch 72.0 (32.7)
1 9 4 - M 1 6 6 9 0 0 194 w/manual reset 72.0 (32.7)
1 9 4 - 7 B 1 6 7 2 0 0 194 w/Series 7B switch 72.0 (32.7)
1 9 4 - 7 B M 1 6 7 3 0 0 194-7B w/manual reset 72.0 (32.7)
1 9 4 - B 1 6 6 7 0 1 194 w/alternate tappings 72.0 (32.7
Dimensions, in. (mm)
Series 194
Low Water Cut-Off/Pump Controllers
Electrical Ratings
345 VA at 120 or 240 VAC
Y
53
Boiler Controls
McDonnell & Miller
06. HotWtrLwco 50-61• 3/6/07 12:44 PM Page 53