Xylem McDonnell & Miller 47 Series Instruction Manual page 4

STEP 2 - Preparation (Installing Quick Hook-up Fittings to Water Feeder)
a. Turn the boiler off.
b. Drain the water in the boiler until the level falls below the lower
gauge glass connection (A). Allow the boiler to cool to 80˚F
(27 ˚C) and allow the pressure to release to 0 psi (0 bar).
c. Remove the water glass (B) and gauge glass connections (C)
from the boiler.
d. Determine the position of the black "Y" casting (F).
If gauge glass tappings (D) and (E) are less
than 10 5 ⁄ " (270 mm) apart, install the black
8
"Y" casting (F) as depicted in the diagram to the
top right.
If gauge glass tappings (D) and (E) are
greater than 10 5 ⁄ " (270 mm) apart, invert
8
the black "Y" casting (F) as depicted in the
diagram to the bottom right.
If gauge glass tappings (D) and (E) are
greater than 14" (356 mm) apart, invert the
black "Y" casting (F) as depicted in the diagram
to the bottom right and install a longer nipple (G).
4
OR
OR
A
C
B
F
E
G
10-5/8"
(270mm)
D
INVERTED "Y" CASTING
Note:
F
Reverse union
nuts, packing
and plug.
G
Tighten top
nut securely.