Xylem MM 715B User Manual

Replacement Float

SA63-30

For Installation on Series 63 Low Water Cut-Off

SA60-30

For Installation on Series 65/165 Liquid Level Switch

SA64-30

For Installation on Series 64/764 Low Water Cut-Off

INSTRUCTION MANUAL

MM-715B

SA63-30 Replacement Float (Weighted) SA60-30 Replacement Float (Not Weighted)

SA64-30 Replacement Float

WARNING

CAUTION

ARNING

• Before using this product read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application,

installation, and maintenance of plumbing, steam, and electrical equipment and/or systems in accordance with all applicable codes and ordinances.

Failure to follow this warning could cause property damage, personal injury or death.

STEP 1 - Float Removal and Replacement

a. Turn power off to boiler and all controls.

Allow boiler to cool to 80˚F (27˚C) and reduce the pressure to 0 psi (0 bar).

CAUTION

There may be more than one source of power to the boiler.

Drain water in the boiler to a level that is below the float chamber.

OFF

b. Remove Head Assembly

• Remove screws (A) and lift off

switch cover.

• Identify terminal connections for rewiring and then disconnect all wires from terminal panels.

• Remove head bolts. Carefully remove head assembly from control body.

• Carefully place head assembly in vice where replacement work can be performed

more conveniently.

MODEL 65-HD/165-HD

COVER BOLTS (A)

SECURE THE FLOAT ARM HERE

LINE

LOW WATER ALARM TERMINALS

MODEL 63-HD

TERMINAL PANEL

N. C.

SECURE THE

FLOAT ARM HERE

MODEL 64-HD

FLOAT STOP

BRACKET

LOW WATER CUT-OFF TERMINALS

BELLOWS

FLOAT ARM

HEAD ASSEMBLY

HEX HEAD BOLTS

SWITCH COVER

SCREW

(A)

TERMINAL

HEAD BOLTS

PANEL

HEAD ASSEMBLY

LOAD

HEX HEAD BOLTS

SECURE

FLOAT MOUNTING BLOCK

HERE

HEAD ASSEMBLY

TERMINAL PANEL

TOP

c. Remove and Replace Float

• While securely holding the arm or mounting block, where indicated in the diagram above, unscrew float ball from the assembly Holding the arm or mounting block reduces the risk of damaging the bellows from unnatural stresses.

• Screw new float onto assembly. On model 64 units, be sure the float stop

bracket is in proper position.

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