Xylem MM 315E Models 51, 51S and 53 Boiler Water Feeders Models 51-2, 51-S-2 and 53-2 Feeder Cut-Off Combinations - Manual (Page 3)

a. Using the criteria in Step 1,
determine the location of the
51/51-2, 51-S/51-S-2 or 53/53-2.
This applies when the gauge
glass is directly mounted in the
boiler or on a water column.
b. Use Figure 1 or Figure 2 as a
general guide.
c. Connect steam equalizing lines
to any available opening other
than steam flow line.
(Take off line).
d. Test the Model 51/51-2, 51-S/51-S-2 and 53/53-2 Before Turning it Over to the Owner
Open the blow-down valve while burner is operating. As the water level drops the feeder will begin to
add water. As the water continues to drop the burner will shut off (on the 51-2, 51-S-2 and 53-2 only).
STEP 2 - Installation of the Models 51/51-2, 51-S/51-S-2 and 53/53-2
3
Lower
Gauge
Glass
Connect to Return
Header on Boiler
Side of all Valves
1" Crosses
Gauge Glass
Level
Mark
1" Steam Equalizing Line
(Short as Possible)
1" Minimum Blow-down
Valve for Feeder
Float Chamber
1" Water
Equalizing Line
(Short as Possible)
Cold City Supply
Normal Water Line
Swing Check Valve
By-Pass
Feeder Casting Mark
(See Installation Location)
1" Crosses
Level
Mark
Water
Column
1" Steam Equalizing Line (Short as Possible)
1" Minimum Blow-down Valve
for Feeder Float Chamber
Normal Water Line
Feeder Casting Mark
(See Installation Location)
Connect to Return
Header on Boiler
Side of all Valves
Swing Check Valve
Cold City Supply
By-Pass
1" Water Equalizing Line (Short as Possible)
1" Minimum Blow-down Valve
Figure 1
Gauge Glass Mounted in the Boiler
Figure 2
Gauge Glass Mounted on a Water Column