Xylem MM 404J Series 93/193 and Series 94/194 Low Water Cut-Off/Pump Controllers For Steam Boilers and Level Control Applications - Manual (Page 6)

6
STEP 4 - Installing a Water Gauge Glass and Tri-Cocks
Tri-Cock Gauge Glass Tapping Gauge Glass Tapping
Tapping Pipe Size Center Distance
Unit B C D E F H J K L
193 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 12 3 ⁄
4
(324)
193-A 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 11 1 ⁄
2
(292)
193-B 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 12 3 ⁄
4
(324)
193-D 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 11 1 ⁄
2
(292)
193-G 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 11 1 ⁄
2
(292)
194 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 11 5 ⁄
8
(295)
194-A 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 1 ⁄
2
(15) 12 7 ⁄
8
(327)
194-B 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 3 ⁄
4
(20) 12 7 ⁄
8
(327)
CUT-OFF LEVEL
CUT-OFF
LEVEL
3"
3"
B
D
F E
C
K
L
J H
a. Determine pipe size of tri-cock and
sight glass tappings for the control
being installed including center
distance of sight glass tappings.
NOTE:
These items are not provided with
control and must be purchased
separately
b. Install tri-cocks and gauge glass following
manufacturer’s instructions.
NOTE: A separate water column for installation of
gauge glass and tri-cocks may be required for boilers with a Series 93 or Series 94 control. Follow the
manufacturer’s instructions to install the water column.
GAUGE GLASS
(TYPICAL)
TRI-COCK
(TYPICAL)
5
a. Using a pipe wrench, remove the float blocking plugs (I)
and dowels ( H) from the control as shown below.
b. Using a pipe wrench, screw the pipe plugs provided with
control into the open tappings.
STEP 3 - Removing Float Blocking Plugs and Dowels
I
H
I
H
Series 93 / 94 Series 193 / 194
CAUTION
The plug and rod must be reinstalled before control is shipped installed on the
boiler, and removed after boiler is placed and installed.
Failure to follow this caution may damage the float and operating mechanism.
!