LiftMaster K74-18655 Guia De Inicio Rapido página 2

INSTALL THE NEW DC ALARM
1. Insert the provided alarm flange onto the
chassis using the mounting holes that held
the old alarm.
2. Mount the alarm in the flange (Figure 3).
a. Remove the plastic nut from the alarm.
b. Insert the alarm through the flange.
c. Secure the alarm to the flange with the
plastic nut.
3. Use a provided wire tie to secure the wires
from the alarm to the body of the alarm as
shown to prevent the wires from being
tangled in the sprocket.
4. Route the wire harness to the main board
following the same path as the old harness.
Connect the red wire to J1-16, and the black
wire to J1-12. Polarity is important (see
illustration). If NOT connected with correct
polarity, the alarm will be damaged (Figure
4).
5. Use the wire ties provided to secure the
harness.
6. Connect the provided blue wire between J1-3
and J1-15 (Figure 4).
7. Restore power to the operator.
FIGURE 4
Main board
LAYOUT FOR SW470 SHOWN
FIGURE 3
LAYOUT FOR SW470 SHOWN
TERMINAL BLOCK LOCATED ON THE CHASSIS
P1 P2 P3 P4 R1 R2 R3 R4 B
Plastic nut
Flange
Operator chassis
J1 TERMINAL BLOCK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Black wire (-) from alarm
Red wire (+) from alarm
2
Black Wire
Wire Harness to Alarm
Blue wire
Wire tie
Red Wire
Alarm
Wire harness