MAINTENANCE
The following should be checked by an authorized LiftMaster dealer:
BATTERY
The battery should be replaced every three years. Use only LiftMaster part 29-NP712 for replacement batteries. The
operator comes with one 7AH battery. A second 7AH (29-NP712) battery may be added or one 33AH
(A12330SGLPK) may be used in place of the 7AH batteries. The batteries contain lead and need to be disposed of
properly.
DRIVE CHAIN (SLIDE ONLY)
Over time, the drive chain on the operator will stretch and need to be tightened. To tighten the drive chain adjust
either of the two chain eye bolts.
NOTE: The chain should have no more than 1 inch of sag for every 10 feet of chain length.
CHECK AT LEAST ONCE EVERY MONTH
DESCRIPTION TASK
External Entrapment Protection System Check and test for proper operation
Photoelectric Sensors Check and test for proper operation
Warning Signs Make sure they are present
Gate Inspect for wear or damage
Drive Chain (Slide Only) Check for excessive slack and lubricate
CHECK AT LEAST ONCE EVERY
DESCRIPTION TASK 6 MONTHS 3 YEARS
Manual Disconnect Check and test for proper operation X
Sprockets and Pulleys Check for excessive slack and lubricate X
Accessories Check all for proper operation X
Electrical Inspect all wire connections X
Chassis Mounting Bolts Check for tightness X
Operator Inspect for wear or damage X
Batteries Replace X
ACCESSORIES
THE PROTECTOR SYSTEM
®
PHOTOELECTRIC SENSORS
The photoelectric sensors are designed to detect an obstacle in the path of the
electronic beam and stop the operator. Includes mounting brackets.
Model 50-220
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ENTRAPMENT PROTECTION DEVICES
Chamberlain offers a variety of LiftMaster Security
✚
®
and Passport™ remote controls to satisfy your application
needs. Single-button to 4-button, visor or key chain. Additionally, Passport™ remote controls are ideal for
integration with Telephone Entry and Access Control Systems. Contact your authorized LiftMaster dealer for details.
3-BUTTON SECURITY✚
®
REMOTE CONTROL
The 3-button remote control can be programmed to control the operator. Includes
visor clip.
Model 373LM
3-BUTTON MINI-REMOTE CONTROL WITH SECURITY✚
®
The 3-button remote control can be programmed to control the operator. Includes
key ring and fastening strip.
Model 370LM
REMOTE CONTROLS
SENSING EDGE (2-WIRE, NON-MONITORED)
Sensing edges can detect an obstacle upon contact and stop the operator.
Models G65MG0204, G65MG0205, G65MGR205 and G65MGS205
SENSING EDGE CHANNEL
Mounting channel for all MG020 type edges.
Model G65ME120C5
SECURITY✚® KEYLESS ENTRY
Enables homeowner to operate gate operator from outside by entering a 4-digit
code on a specially designed keypad.
Model 377LM
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