1. Introduction
Thank you for choosing the Puroma LB72C Wall-Mounted Combination Key Lock Box. This manual provides essential instructions for the proper setup, operation, and maintenance of your key lock box. Please read this manual thoroughly before installation and use to ensure optimal security and longevity of the product.

Image 1.1: The Puroma LB72C Key Lock Box in its closed state, displaying the four combination dials.
2. Product Features
- Durable Construction: Made from high-quality aluminum alloy and steel for enhanced security against tampering.
- Resettable 4-Digit Combination: Offers 10,000 possible combinations for personalized security.
- Wall-Mounted Design: Includes all necessary hardware for secure wall installation.
- Large Internal Capacity: Sufficient space to store multiple house keys or car keys.
- Weather Resistant: Designed to withstand outdoor elements, featuring rust-proof and corrosion-resistant properties.

Image 2.1: Detailed view of the lock box dimensions (3.07"W x 3.7"H x 1.54"D) and internal storage (2.16"W x 2.99"H), highlighting the included 4 screws and 4 expansion plugs for mounting.

Image 2.2: The 4-digit combination mechanism, emphasizing the 10,000 unique code possibilities.
3. Setup and Installation
3.1 Initial Code Setting
The lock box comes pre-set with the default combination 0-0-0-0. To open the lock box for the first time, align the dials to 0-0-0-0 and pull down the front cover.
3.2 Wall Mounting
The Puroma LB72C is designed for secure wall mounting. Follow these steps for installation:
- Choose a suitable location on a solid wall for mounting.
- Open the lock box and use the pre-drilled holes on the back as a template to mark the drilling points on the wall.
- Drill holes at the marked points. Insert the provided expansion plugs into the drilled holes.
- Align the lock box with the expansion plugs and secure it to the wall using the provided 4 screws. Tighten the screws with a Philips screwdriver until the lock box is firmly attached.
- Insert the two black rubber plugs into the screw holes inside the lock box to prevent dust and water entry.

Image 3.1: Visual guide for wall mounting: 1. Nail into expanded plugs. 2. Tighten screws. 3. Mounted on the wall.
4. Operating Instructions
4.1 Opening the Lock Box
To open the lock box, rotate the combination dials to your set 4-digit code. Once the correct code is entered, pull down the front cover to access the internal storage compartment.
4.2 Resetting the Combination Code
You can reset your personal 4-digit combination code at any time. Follow these steps:
- Open the lock box using the current combination (default is 0-0-0-0).
- Locate the reset lever inside the lock box, usually on the back of the front cover. Push the RESET button/lever from position A to position B.
- While the lever is in position B, set your desired new 4-digit combination by rotating the dials. Choose a memorable but secure code.
- Push the RESET button/lever back from position B to position A. Your new code is now set.
- Close the lock box and scramble the dials to lock it. Test your new code to ensure it works correctly before closing the cover completely.

Image 4.1: Steps to reset the code: 1. Set default code 0-0-0-0 to open. 2. Push RESET button from A to B. 3. Set new combination. 4. Push RESET button from B to A.
5. Maintenance
To ensure the longevity and proper functioning of your Puroma key lock box, follow these maintenance guidelines:
- Cleaning: Wipe the exterior with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the finish.
- Weather Protection: The lock box is designed to be rust-proof and corrosion-resistant, making it suitable for outdoor use. While it is weatherproof against rain and dust, it is not water resistant, meaning it should not be submerged in water or exposed to high-pressure water jets.
- Lubrication: Periodically apply a small amount of silicone-based lubricant to the combination dials and the hinge mechanism to ensure smooth operation.
- Check Mounting: Regularly inspect the mounting screws to ensure they remain tight and secure.

Image 5.1: The lock box enduring light rain, demonstrating its weatherproof design against typical outdoor conditions.
6. Troubleshooting
If you encounter issues with your Puroma key lock box, please refer to the following common problems and solutions:
- Lock Box Will Not Open:
- Ensure the correct 4-digit combination is entered. Double-check each number.
- Verify that the dials are perfectly aligned with the indicator line.
- If the code was recently changed, ensure you are using the new code.
- Dials Are Stiff or Hard to Turn:
- Apply a small amount of silicone-based lubricant to the dials.
- Clean any dirt or debris from around the dials.
- Reset Lever Does Not Move:
- Ensure the lock box is open and the dials are set to the current correct combination before attempting to move the reset lever.
If these steps do not resolve the issue, please contact Puroma customer support for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Puroma |
| Model Number | LB72C |
| Product Dimensions | 1.54"D x 3.07"W x 3.7"H |
| Lock Type | Mechanical Code Lockbox |
| Color | Grey |
| Material | Aluminum Alloy, Steel |
| Mounting Type | Wall Mount |
| Item Weight | 0.53 Kilograms (1.17 pounds) |
| Water Resistance Level | Not Water Resistant (Weather Resistant) |
| Included Components | Aluminum Zinc Alloy Lock Body, Mounting Hardware (screws, expansion plugs, rubber plugs) |
| UPC | 840064902298 |
8. Warranty Information
The Puroma LB72C Key Lock Box comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and material flaws under normal use. It does not cover damage resulting from misuse, accidents, unauthorized modifications, or improper installation.
Please retain your proof of purchase for warranty claims. For warranty service, contact Puroma customer support.
9. Customer Support
For any questions, technical assistance, or warranty inquiries regarding your Puroma LB72C Key Lock Box, please contact our customer support team.
Contact Information:
Please refer to the contact details provided on the product packaging or the official Puroma website for the most up-to-date support information.
