Xylem MM 320C Series 851, 851 2 and 847 Make-up Water Feeders - Manual (Page 3)

3
INSTALLATION – TOOLS NEEDED:
One (1) pipe wrench and one (1) socket wrench.
STEP 1 - Preparation
A
Drain the water in the receiving tank to a level
which is below the control opening (A). Allow the
boiler to cool to 80˚F (27˚C) and allow the
pressure to release to 0 psi (0 bar).
C
D
Use a socket wrench to secure the feeder (D)
to the receiver tank with the six
3 /
8
” - 16
bolts through mounting flange (C) and
tighten to 18 ft•lb (24 N•m).
STEP 2 - Install the Control Unit
Mounting Flange Dimensions
B.C
.
O.D.
Float
O.D. B.C. C D Diameter
6 11 ⁄
16
(170) 5 3 ⁄
4
(146) 6 7 ⁄
16
(11.1) 4 3 ⁄
4
(121)
Series 851, 851-S and 847
Dimensions, in. (mm)
“C” - number of mounting holes
“D” - size of mounting holes