1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the Tesa Assa Abloy 2210303NI lock. Please read these instructions carefully before beginning installation or use to ensure proper function and safety.
2. Product Overview
The Tesa Assa Abloy 2210303NI is a robust lock designed for secure door applications. Key features include:
- Tilt Lock Slide Monopunto Lever: Reinforced for durability and reliable operation.
- Material Construction: Features a stainless steel front and strike plates, with a galvanized steel handle and nickel-plated lever box and cover.
- Reversible Latch: The latch is reversible, allowing for flexible installation on left or right-handed doors. It is powered by both the handle and the key.
- Compact Box Design: Equipped with a box less than 15 mm, designed to fit European profile camera systems without requiring additional machining of nerves, simplifying installation for carpenters.
- Cylinder Compatibility: Designed for use with a separate cylinder (not included).
3. Safety Information
- Always wear appropriate personal protective equipment (PPE) during installation.
- Ensure all components are securely fastened to prevent accidental dislodgement.
- Do not modify the lock components, as this may compromise security and void the warranty.
- Keep small parts away from children to prevent choking hazards.
4. Package Contents
Verify that all components are present before beginning installation:
- 1 x Tesa Assa Abloy 2210303NI Lock Body
- (Additional components such as screws, strike plate, and spindle may be included depending on the specific kit. Refer to your packaging for a complete list.)
5. Setup and Installation
Follow these steps for proper installation of the Tesa Assa Abloy 2210303NI lock. Professional installation is recommended.
5.1. Prepare the Door
Ensure the door is properly prepared with the necessary mortise cutouts for the lock body and faceplate. The compact design of this lock, with a box less than 15 mm, is specifically engineered to fit European profile camera systems without requiring additional machining of nerves.
5.2. Install the Lock Body
- Insert the lock body into the mortise cutout on the door edge.
- Align the faceplate with the door edge and secure it with screws.
- Ensure the lock body is flush with the door edge and operates smoothly.

Figure 1: Side view of the Tesa Assa Abloy 2210303NI lock body. This image illustrates the profile of the lock, including the latch and deadbolt, as it would appear when installed within a door mortise.
5.3. Reversing the Latch (if necessary)
The latch is reversible. If the door swing requires the latch to be oriented in the opposite direction:
- Locate the small screw or pin on the side of the latch mechanism.
- Depress or remove the screw/pin, pull out the latch, rotate it 180 degrees, and reinsert it.
- Ensure the latch clicks securely into place.
5.4. Install Spindle and Cylinder
- Insert the spindle through the follower hole in the lock body.
- Insert the appropriate European profile cylinder (not supplied) into its designated opening.
- Secure the cylinder with the retaining screw through the faceplate.

Figure 2: Technical drawing of the Tesa Assa Abloy 2210303NI lock. This diagram provides critical dimensions for installation, including overall height (174mm), backset (A), and distances to the spindle (85mm) and cylinder (34mm) centers.
Refer to Figure 2 for precise measurements during installation. Key dimensions include:
- Overall height: 174 mm
- Distance from top screw to spindle center: 55 mm
- Distance from spindle center to cylinder center: 85 mm
- Distance from cylinder center to bottom screw: 34 mm
- Backset (A) and total depth (A+13) are indicated.
5.5. Install Door Furniture
Attach the door handles/levers and escutcheons according to their manufacturer's instructions, ensuring they engage correctly with the spindle and cylinder.
5.6. Install Strike Plate
Align and install the strike plate on the door frame, ensuring it is positioned correctly for the latch and deadbolt to engage smoothly without binding.
6. Operating Instructions
The Tesa Assa Abloy 2210303NI lock operates as follows:
- Opening from inside: Depress the lever handle to retract the latch.
- Opening from outside: Insert the key into the cylinder and turn to retract the latch and/or deadbolt. Depress the lever handle to open the door.
- Locking: Turn the key in the cylinder to extend the deadbolt.
7. Maintenance
- Cleaning: Wipe the lock's visible surfaces with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Lubrication: Periodically apply a small amount of graphite-based lubricant to the internal mechanisms of the lock and cylinder (if applicable) to ensure smooth operation. Do not use oil-based lubricants, as they can attract dust and grime.
- Inspection: Regularly check all screws and fasteners for tightness. Ensure the lock operates smoothly without excessive force.
8. Troubleshooting
- Lock is stiff or difficult to operate:
- Check for obstructions in the door frame or strike plate.
- Apply lubricant as described in the Maintenance section.
- Ensure all screws are tightened correctly and not causing binding.
- Latch does not retract fully:
- Verify the spindle is correctly installed and not bent.
- Check for debris inside the lock mechanism.
- Key is difficult to turn:
- Ensure the correct key is being used.
- Lubricate the cylinder with a graphite-based lubricant.
- Check if the cylinder is properly secured and not misaligned.
9. Specifications
| Brand | Tesa Assa Abloy |
| Model Number | 2210303NI |
| Material | Alloy Steel |
| Item Dimensions (L x W x H) | 9.45 x 1.97 x 1.57 inches (240 x 50 x 40 mm approx.) |
| Item Weight | 0.28 Kilograms (0.62 lbs) |
| Number of Pieces | 1 (lock body) |
| Shape | Round (referring to internal mechanism components) |
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Tesa Assa Abloy customer service directly. Keep your proof of purchase for warranty claims.
Manufacturer: Tesa Assa Abloy
Global Trade Identification Number (GTIN): 08414625817622

