LiftMaster K74-18655 Guia De Inicio Rapido

DC Alarm Kit
K74-18655 for SW420, SW470, and SW490 Operators
REMOVE THE EXISTING DC ALARM
1. Disconnect power from the operator.
2. Disconnect the wire harness from the main board connections
J1-16 and J1-12 (Figure 1).
NOTE: The J1 terminal block can be removed from the main
board to aid in wiring. If you remove the terminal block, make
sure to replace it securely on the main board.
3. Remove the existing alarm and wire harness (Figure 2).
FIGURE 1
J1 TERMINAL BLOCK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Black wire (-) from alarm
Main board
Alarm
AC ALARM
DC ALARM
Removable
connector
Components covered
with heat shrink
Red wire (+) from alarm
LAYOUT FOR SW470 SHOWN
Flange
To reduce the risk of INJURY or DEATH:
• Disconnect all power BEFORE installing or servicing operator.
• See manual prior to servicing regarding maintenance and
required safety testing.
WARNING: This product can expose you to chemicals
including lead, which are known to the State of
California to cause cancer or birth defects or other
reproductive harm. For more information go to
www.P65Warnings.ca.gov.
CARTON INVENTORY
• Alarm with wire harness (1)
• Extra blue wire stripped on both sides (connects J1-3 to
J1-15) (1)
• Wire ties (4)
• Flange (41-G0538) (1)
TOOLS NEEDED
• Pliers
• #2 Phillips Head screwdriver
• 1/8" flat Phillips Head screwdriver
Old alarm
• Diagonal wire cutters
• Wire strippers
FIGURE 2
For reference only. Your equipment may look different.
Existing alarm
Operator chassis
Operator chassis
Plastic nut
Regulator
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
Flange
Plastic nut
Flange
Plastic nut