Xylem MM 415C Replacement Head Mechanism 150E HD - Manual (Page 4)

4
A
B
C
D
c. Remove the existing head mechanism (C)
from the body (D).
a. Drain water in the boiler to a level
which is below the float chamber (A).
Allow the boiler to cool to 80˚F
(27˚C) and release the boiler pres-
sure to 0 psi (0 bar).
b. Using a flatblade screwdriver, remove the
junction box cover (B). Disconnect, mark,
and remove the supply wires and conduit
connections.
F
E
d. Using a scraper, remove the old gasket (E).
Clean all debris from the float chamber. The
gasket sealing surface (F) must be smooth
and clean.
STEP 1 - Preparation
INSTALLATION –
TOOLS NEEDED:
One (1) pipe wrench, one (1) flatblade screwdriver, one (1) scraper, and one (1) 9/16" socket or wrench.
• To prevent serious burns, the boiler must be cooled to 80˚F (27˚C) and the pressure must be 0 psi (0 bar)
before servicing.
• To prevent electrical shock, turn off the electrical power before disconnecting or making electrical connections.
Failure to follow this warning could cause property damage, personal injury or death.
! WARNING
There may be more than one source of
power to the control.
! CAUTION
A
B
C
D