Xylem MM 413F Replacement Head Mechanism With Switch Ass User Manual download pdf (Page 3)

OFF

STEP 1 - Preparation

INSTALLATION –

TOOLS NEEDED:

One (1) flathead screw driver, one (1) scraper and

one (1) 9/16" socket box or open end wrench.

a. Turn power off to boiler and all controls.

FLOAT

CHAMBER

b. Allow boiler to cool to 80˚F (27˚C) and

reduce pressure to 0 psi (0 bar).

Drain water in boiler to a level that is

below the float chamber.

There may be more than one source of power to

the boiler.

CAUTION

TOWER TUBE

SWITCH

ASSEMBLY

SWITCH

COVER

TERMINAL

PANELS

CONDUIT

CONNECTOR

FITTING

HUB

a. Disconnect and Remove Wires.

For Replacement Heads with Switches

(-HD Models)

• Remove two screws (A) and lift off switch

cover.

• Identify terminal connections for rewiring

and then disconnect all wires from

terminal panels.

• Remove conduit connection and wires

from integral fitting hub.

For Replacement Heads without Switches

(-HDLS Models)

• Remove four hex nuts (B) and carefully lift

switch assembly up and off tower tube.

STEP 2 - Head Removal

1 2 3 4 5 6 7 8

Replacement Head Mechanism 1
OPERATION 2
INSTALLATION – 3
HEAD ASSEMBLY 4
CONTROL BODY 4
92-68 FLANGE GASKET 5
150-14 FLANGE GASKET 5
FLOAT STOP PLATE 5
TERMINAL 6
STEP 6 - Testing 7
TROUBLESHOOTING 7
MAINTENANCE 8

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Xylem MM 413F Replacement Head Mechanism With Switch Ass User Manual Page 3

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