Xylem MM 413F Replacement Head Mechanism With Switch Assembly: 93-HD, 93-M-HD, 93-7B-HD, 93-7B-M-HD, 94-HD 94-M-HD 94-7B-HD 94-7B-M-HD - Manual (Page 6)

6
E
F
g. Using a screwdriver and pipe wrench
remove float block dowel (E) and plug (F).
Install pipe plug included with unit in opening.
f. Using a torque wrench, tighten head bolts
in an alternating star pattern.
Tighten to 14-20 ft•lbs for Series 93 models.
Tighten to 17-21 ft•lbs for Series 94 models.
STEP 4 - Reconnect Switch Assembly Wiring
TOWER TUBE
SWITCH
ASSEMBLY
SWITCH
COVER
TERMINAL
PANELS
CONDUIT
CONNECTOR
FITTING
HUB
B
A
For Replacement Heads with Switches
(-HD Models)
• Reattach the conduit connector and
wires to the integral fitting hub.
• Reconnect wiring to terminal panel in
exactly the same position as removed.
• Replace switch cover and fasten with two
screws (A).
For Replacement Heads without Switches
(-HDLS Models)
• Carefully slide switch assembly over
tower tube and secure with four hex
nuts (C).
CAUTION
The plug and rod must be reinstalled before control is shipped
installed on the boiler, and removed after boiler is placed and
installed.
Failure to follow this caution may damage the float and operating
mechanism.
!