Install Instructions

2
OFF
ON
a. To prevent electrical shock turn off all electrical
power to the boiler.
CAUTION: There may be more than one source
of power to the boiler.
STEP 1 - Preparation
b. Release all pressure from the boiler and let it cool down to 80˚F (27˚C). Drain the water level
down below the float chamber.
c. Remove the four screws that hold the cover on the
switch housing (A) and remove the cover. Mark all
electrical supply wires so they can be returned to
the proper terminals. Remove the wires and conduit
connections from switch housing (A).
E
D
A
F
C
B
d. Remove eight hex head bolts holding head
mechanism (B) to float chamber. Carefully remove
head mechanism (B) from float chamber and place
in a vise.
e. Holding float (C) firmly, unscrew Allen
®
or Torx
®
fastener (D). (Units with date codes of E99 or earlier
will have Allen
®
head fasteners. Those with codes of
F99 or later will have Torx
®
fastener). Unscrew float
and float rod (C). For snap switch units see Step 3a.
For mercury switch units remove the two mercury
switches. Remove six (6) Allen
®
or Torx
®
screws (E).
f. Remove switch housing (A) from head casting (B).
The bellows assembly (F) may stick to the switch
housing (A). Remove bellow assembly (F) and
clean gasket surfaces on both head casting (B) and
switch housing (A).
B
A
Four Cover
Screws
Eight Hex
Head Bolts