- Learn about your door01
- Determine the door opening direction02
- Measuring the thickness of the door03
Special Chang Heng smart lock is suitable for 90% of the doors. Before buying, please determine the type of door that you need to install. Tips: how to determine whether to take the world pole.
Method 1: touch the top edge of the door to determine whether there is a keyhole;
Method 2: When the lock tongue is in the pop-up state, it is determined whether the top edge of the door is popped out.
| Types of | Installation Notes | Use lock body |
| National standard security door | Can be installed directly | With heaven and earth rod lock body |
| Non-national security door | Need to undergo special modification to install | With heaven and earth rod lock body |
| Wooden door | Choose the world without lock, according to the standard hole | Worldless lock body |
| Glass door | The width of the border strip is more than 110mm, which can be installed; the pure glass door cannot be installed | Worldless lock body |
| Tongmen | Choose the world without lock, according to the standard hole | Worldless lock body |
| Tips: How to choose the door opening direction? Which side of the hinge (left or right) is left or right; push the door is inside and pull door is outside. | |
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| [Left] facing the door, the hinge is installed on the left side of the door frame, and push the door inward; [Right] facing the door, fully installed on the right side of the door frame, if you push the door inwards; | [Right Out] facing the door, the hinge is installed on the right side of the door frame, if you push the door outward; [Left Out] facing the door, fully installed on the left side of the door frame, and pull the door outward; |
| Tips: How to choose the door opening direction? Which side of the hinge (left or right) is left or right; push the door is inside and pull door is outside. | |
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| Determine the thickness of the security door | Determine the width of the lock body guide |
