Corbin Russwin ML2057-NSM Storeroom Mortise Lock

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the Corbin Russwin ML2057-NSM-613-LC Storeroom Mortise Lock. Designed for high-traffic commercial, institutional, industrial, and government applications, this Grade 1 lock offers robust security and durability. Please read these instructions thoroughly before installation and use to ensure proper function and longevity of the product.

2. Product Overview

The Corbin Russwin ML2057-NSM-613-LC is a heavy-duty mortise lock constructed from heavy-gauge steel. It features a patented Quick Reversible latchbolt, allowing for re-handing without disassembling the lock case. The lock is finished in 613 Oil Rubbed Dark Bronze and is suitable for various door types and environments.

Image: Corbin Russwin ML2057-NSM Mortise Lock. This image displays the exterior view of the mortise lock with its lever handle and keyway, showcasing the 613 Oil Rubbed Dark Bronze finish.

Key Features:

• Grade 1 Durability: Certified ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1.
• Quick Reversible Latchbolt: Allows for easy re-handing without disassembling the lock case.
• Storeroom Function (F07): Latch bolt operated by grip inside or by key outside. Outside grip is always rigid.
• Auxiliary Latch: Deadlocks the latchbolt for enhanced security.
• Inside Grip Always Free: Provides immediate egress from the inside.
• Fire Rated: UL/cUL-UL10C Positive Pressure listed for A label and lesser class doors (up to 3-hour fire door).

3. Specifications

4. Installation

Proper installation is crucial for the security and functionality of your Corbin Russwin mortise lock. It is recommended that installation be performed by a qualified professional.

Pre-Installation Checks:

• Verify door thickness is 1-3/4" (44mm) or compatible.
• Ensure the door and frame mortise prep matches the required dimensions: frame strike plate ANSI 4-7/8", door lock faceplate 8" x 1-1/4", and a backset of 2-3/4".
• Confirm that the correct cylinder (part #1000-118-a01-l4-613 or equivalent) and keys are available, as they are not furnished with the lock body.

Installation Steps (General Guidance):

1. Prepare Door and Frame: Ensure all mortise cuts in the door edge and face, as well as the strike plate mortise in the frame, are precisely cut according to the provided templates (not included in this manual, refer to product packaging or manufacturer's website).
2. Install Mortise Lock Body: Insert the lock body into the mortise pocket in the door edge. Secure it with the provided screws through the lock faceplate.
3. Re-handing Latchbolt (if necessary): The patented Quick Reversible latchbolt allows for easy re-handing without disassembling the lock case. Follow the specific instructions provided with the lock for this procedure.
4. Install Trim (Levers/Knobs): Attach the interior and exterior levers/knobs according to the manufacturer's instructions, ensuring they engage correctly with the lock mechanism.
5. Install Cylinder: Insert the appropriate cylinder into the lock body from the exterior side and secure it with the cylinder set screw.
6. Install Strike Plate: Secure the ANSI straight lip strike plate to the door frame using the provided screws, ensuring proper alignment with the latchbolt.
7. Test Operation: Before closing the door, test the lock's function with the key from the outside and the lever from the inside to ensure smooth operation and proper latching.

5. Operating Instructions

The ML2057-NSM-613-LC features a Storeroom (F07) function, designed for specific access control needs.

Storeroom Function (F07):

• Exterior Operation: The latch bolt is operated by a key from the outside. The outside grip (lever) is always rigid and does not retract the latch.
• Interior Operation: The latch bolt is operated by the grip (lever) from the inside. The inside grip is always free, allowing for immediate egress at all times.
• Auxiliary Latch: An auxiliary latch deadlocks the main latchbolt when the door is closed, preventing manipulation from the outside.

To unlock the door from the exterior, insert the correct key into the cylinder and turn it to retract the latchbolt. To exit from the interior, simply depress the inside lever handle.

6. Maintenance

Regular maintenance ensures the smooth operation and extends the lifespan of your mortise lock.

• Cleaning: Clean the exterior surfaces with a soft, damp cloth. Avoid abrasive cleaners or solvents that may damage the finish.
• Lubrication: Periodically apply a small amount of graphite-based lubricant or a silicone-based spray to the latchbolt mechanism and cylinder. Avoid oil-based lubricants as they can attract dust and debris.
• Fastener Check: Annually inspect all mounting screws for tightness, especially on high-traffic doors. Tighten any loose screws to prevent excessive wear and misalignment.
• Functionality Check: Regularly test the lock's operation from both the interior and exterior to ensure the latchbolt retracts smoothly and the auxiliary latch deadlocks correctly.

7. Troubleshooting

If you encounter issues with your Corbin Russwin ML2057-NSM mortise lock, refer to the following common problems and solutions:

For issues not resolved by these steps, contact a qualified locksmith or Corbin Russwin customer support.

8. Warranty and Support

Warranty Information:

The Corbin Russwin ML2057-NSM-613-LC mortise lock comes with a 10-year limited warranty. This warranty covers defects in material and workmanship under normal use. For specific terms and conditions, please refer to the official Corbin Russwin warranty documentation or contact their customer service.

Customer Support:

For technical assistance, warranty claims, or further information regarding your Corbin Russwin product, please visit the official Corbin Russwin website or contact their customer support department. Always provide your model number (ML2057-NSM-613-LC) when seeking support.