Xylem MM 309F Replacement Cartridge and Strainer Kit Water Feeders with Hex Port Valves - Manual (Page 2)

E
D
C
B
H
x 4
2
OFF
ON
a. Turn off the power to the boiler.
STEP 1 - Preparation
INSTALLATION –
TOOLS NEEDED:
One (1) 13/16" (21mm) socket wrench and one (1)
1/2" (13mm) wrench.
A
A
b. Allow the boiler to cool to 80˚F (27˚C) and
close the two (2) gate valves (A) in the
system piping.
a. Using the 1/2" (13mm) wrench, unscrew
and remove the four (4) hex-head
screws (B) that secure the strainer.
Discard the strainer (H) and the
gasket (C).
b. Using a 13/16" (21mm) socket wrench,
unscrew the old cartridge (D) from the
valve body (E) and discard it.
NOTE: The cartridge (D) will either be
black (Series 101-A, 47, 247 and 847)
or gray (Series 51, 851 and 551-S) and
should be replaced with a similarly
colored replacement cartridge.
STEP 2 - Remove the Original Cartridge and Strainer