Xylem MM 714C Replacement Pump and Burner Switch Arm Contacts with Terminal Panel - Manual (Page 3)

3
NOTCH NOTCH
5 / 5-M
TERMINAL PANEL
ORIENTATION
2 4
1
BLUE RED
3
3 1
4 2
A
C
E
TOWER TUBE
FITTING HUB
SWITCH
HOUSING
TERMINAL
CONNECTIONS
SWITCH
COVER
PUMP
TERMINAL
PANEL
BURNER
TERMINAL
PANEL
CONDUIT
CONNECTOR
NAMEPLATE
NAME PLATE
BASE
PLATE
B
D
d. Replace Switch Housing, Switch
Assembly and Reconnect Wiring
• Replace switch housing and fasten to
base plate with four screws (E).
• Move burner switch arms to upright position
by reaching through nameplate opening
and holding burner switch lever midway
between stops. Carefully set burner
terminal panel in position and fasten with
screws (D). Do not force. (See diagram at
lower right for proper orientation of
terminal panel).
• Move pump switch arms to upright position
by reaching through nameplate opening
and holding pump switch lever midway
between stops. Carefully set pump
terminal panel in position and fasten with
screws (D). Do not force. (See diagram
at lower right for proper orientation of
terminal panel).
• Check visually to see that contact arms
are in proper position between terminal
panel contacts and move lever up and
down to see that switch operates freely
and smoothly.
• Carefully slide switch assembly over
tower tube and secure with four hex
nuts (B).
• Install conduit connector and wires to
the integral fitting hub on switch
assembly.
• Reconnect wiring to terminal panel in
exactly the same position as removed.
• Replace switch cover and fasten with
two screws (A).
• Replace nameplate and fasten with
two screws (C).
F
G
H
I
c. Remove and Replace Switch Arm Contacts
• Remove two screws (F) and lift off bus bar
(G), contact arms (H) and insulator (I).
• Place new insulator (I), contact arms (H) and
bus bar (G) in position and fasten with two
screws (F). Make sure the contact arm blades (H)
are in alignment and at right angle to insulator.
Proceed to Step 2 to Test Control