Chamberlain WD832KD 1/2 HP User Manual

11

•  

Insert a screwdriver tip into one of the nut ring slots 
and brace it firmly against the trolley.

•  

Place a 7/16" open end wrench on the square end. 
Rotate the nut about 1/4 turn until the spring releases 
and snaps the nut ring against the trolley.

This sets the spring to optimum belt tension.

1.   READ AND FOLLOW ALL INSTALLATION WARNINGS AND 

INSTRUCTIONS.

2.   Install garage door opener ONLY on properly balanced and 

lubricated garage door. An improperly balanced door may 
NOT reverse when required and could result in SEVERE 
INJURY or DEATH. 

3.   ALL repairs to cables, spring assemblies and other 

hardware MUST be made by a trained door systems 
technician BEFORE installing opener.

4.   Disable ALL locks and remove ALL ropes connected to 

garage door BEFORE installing opener to avoid 
entanglement.

5.   Install garage door opener 7 feet (2.13 m) or more above 

floor.

6.   Mount the emergency release within reach, but at least 

6 feet (1.8 m) above the floor and avoiding contact with 
vehicles to avoid accidental release.

7.   NEVER connect garage door opener to power source until 

instructed to do so. 

  8.  NEVER wear watches, rings or loose clothing while 

installing or servicing opener. They could be caught in 
garage door or opener mechanisms.

  9. Install wall-mounted garage door control:  
    •  within sight of the garage door. 
    •   out of reach of children at minimum height of 5 feet 

(1.5 m).

    •  away from ALL moving parts of the door.
10.  Place entrapment warning label on wall next to garage 

door control.

11.  Place manual release/safety reverse test label in plain view 

on inside of garage door.

12.  Upon completion of installation, test safety reversal 

system. Door MUST reverse on contact with a 1-1/2" 
(3.8 cm) high object (or a 2x4 laid flat) on the floor.

Nut Ring

Nut Ring

Trolley

Square 
End

Square 
End

BEFORE

1"

(2.5 cm)

AFTER RELEASE

1-1/4"

(3.18 cm)

Nut Ring 
Slot