Xylem MM 244B Series 42S Replacement Snap Switch Assembly - Manual (Page 4)

4
B
3. Remove the cover (B).
LOW WATER
CUT-OFF
TERMINALS
BURNER
SWITCH PUMP
SWITCH
PUMP CIRCUIT
TERMINALS
4. Mark and remove the pump switch
and burner/alarm switch wires from
terminal block.
OFF
ON
1. Turn the boiler off.
A
2. Allow the boiler to cool to 80˚F (27˚C) and
release the boiler pressure to 0 psi (0 bar).
Drain water in the boiler to a level which is
below the float chamber (A).
INSTALLATION –
SECTION 1 - Switch Bracket Replacement
• To prevent electrical shock, turn off the electrical power before making electrical connections.
• This low water cut-off must be installed in series with all other limit and operating controls installed on the
boiler. After installation, check for proper operation of all of the limit and operating controls, before leaving
the site.
Failure to follow this warning could cause electrical shock, an explosion and/or a fire, which could result in
property damage, personal injury or death.
!
WARNING