Xylem MM 244B Series 42S Replacement Snap Switch Assembly - Manual (Page 6)

6
C
C
8a. Install the new switch bracket assembly
into the junction box in the same orienta-
tion as the old switch bracket assembly
(i.e. with arrows on the bracket pointing
toward the terminal block).
b. Secure the new assembly with Torx ®
screws (C) and torque to 80 - 140 in. lb.
(92 - 161 cm. kg.).
B
A
9a. Reaffix the actuator assembly using the
two fillister head screws (B) and torque to
30 - 40 in. lb. (34.5 - 46 cm. kg.).
b. Apply a drop of the supplied adhesive to
the threads of each fillister head screw.
LOW WATER
CUT-OFF
TERMINALS
PUMP
SWITCH
BURNER
SWITCH
PUMP
CIRCUIT
TERMINALS
10. Reconnect the pump switch and burner/
alarm switch wires to terminal block as
noted when disconnected and torque to
13 - 17 in. lb. ( 15 - 19.5 cm. kg.) (Refer
to "Terminal Connection Chart" on page
5 if unsure of proper switch to terminal
block wire connections).
B
11. Reattach the cover (B).
Proceed with normal operational checks of controls as described in Section 2; “Checking Switch Settings and
Adjusting Switch Setpoints at Operating Pressure”; or Section 3; “Checking Switch Settings at "0" Pressure”.
The pump or burner switch operating points should be within +/- 1/4" of those specified for your control.