The LCN 4642 is a Grade 1 regular arm auto equalizer door operator designed for push-side mounting. This electrohydraulic operator provides powered accessibility solutions for manual doors, particularly benefiting individuals with disabilities or limited mobility. The system is designed for applications where automatic operation is occasionally needed, offering a blend of manual and powered functionality. It meets ANSI/BHMA 156.19 standards, ADA requirements in power mode, and is UL and cUL listed. The operator features a non-handed design and is suitable for interior doors up to 4’6” and exterior doors up to 3’6”.
Product Overview and Key Features
The LCN 4640 series, which includes the 4642 model, is described as a “smart and reliable” electrically powered low-energy automatic operator. It is intended for use in situations where doors are primarily opened manually but require occasional automatic assistance. The operator utilizes a 10,000,000 cycle heavy-duty door closer and incorporates features such as on-board diagnostics, an on-board power supply, and factory-default memory. Plug-and-play connections and a “no destruct” feature simplify installation and enhance durability.
The 4640 AUTO EQUALIZER™ is designed to meet the provisions of ANSI Standards A117.1 and A156.19, as well as the Americans with Disabilities Act. It is available with a standard metal cover and is shipped with a regular arm and wood/machine screw pack. Actuators are available as separate components.
Mounting and Dimensions
The LCN 4642 is designed for top jamb mounting, specifically on the push side of the door. The documentation details mounting considerations, including the need for a minimum head frame depth of 1 ¾” (44 mm) to accommodate the standard mounting plate and ensure flush ceiling conditions. Templates are available to allow for 90° power opening and 100° manual opening.
For applications requiring deeper reveals, a long arm option (4640-3077L) is available, which includes a long rod and shoe (4640-79LR). Butt hinges should not exceed 5” (127 mm) in width, and the use of an auxiliary stop is recommended.
Cylinder Options and Components
Several cylinder options are available for the LCN 4642, including:
- 4642-3971: Standard, non-handed cast iron cylinder.
- 4642-3071: Cylinder assembly including the standard cylinder and mounting plate, along with a 4640-3454 motor clutch, 4640-3180 I/O board assembly, and 4640-3462 controller.
- 4642-3071CS: Similar to the 4642-3071 assembly, but with a concealed on/off switch in the endcap and without a hold-open switch. Separate key switches are suggested for use with this configuration.
Additional components include covers (4640-72MC), regular arms (4640-3077), long arms (4640-3077L), rods and shoes (9140-79 and 9140-79LR), switch end caps (4640-334 and 4640-334CS), on/off switch assemblies (4640-3179-1), hold-open switch assemblies (4640-3179-2), PC board assemblies (4640-3180), and motor/clutch assemblies (4640-3454). The control box assembly (4640-3462) houses the digital controller with a built-in 12/24 VDC power supply, allowing for adjustments to timing and sequential door functions, as well as electric strike controls.
Electrical Considerations and Control
The LCN 4642 utilizes an electronic control module for adjusting opening time and force. Maximum hold-open time is adjustable up to approximately five minutes. The system incorporates on-board diagnostics and an on-board power supply. The 4640 series is designed for use with standard electrical wiring, and typical system wiring diagrams are available in the documentation. The operator can be configured with a concealed on/off switch (CS option) and is compatible with optional key switches (8310-806K).
Finishes and Certifications
The LCN 4642 is available in several powder-coated finishes:
- 689 Aluminum
- 691 Light Bronze
- 693 Black
- 695 Dark Bronze
- 696 Brass
The operator carries a Grade 1 certification from ANSI A117.1 and A156.19, is UL and cUL listed, and has undergone 100-hour salt spray testing. It also meets the requirements of the Buy American Act (BAA).
Accessibility Features
A primary function of the LCN 4642 is to enhance accessibility. The operator meets ADA requirements when operating in power mode, providing easier access for individuals with disabilities, the elderly, or those who are frail. The system’s low-energy operation and automatic opening capabilities contribute to a more inclusive environment.
Installation Notes
The documentation emphasizes the importance of proper installation. The standard mounting plate can be used to achieve flush ceiling conditions. The operator is shipped with a regular arm, metal cover, and wood/machine screw pack. Actuators are sold separately. The system is designed for non-handed applications, accommodating both right and left-swinging doors.
Conclusion
The LCN 4642 Auto Equalizer door operator offers a robust and reliable solution for enhancing accessibility and convenience in a variety of applications. Its combination of manual and powered operation, coupled with its adherence to industry standards and certifications, makes it a suitable choice for both commercial and residential settings. The operator’s features, including adjustable opening time and force, concealed switch options, and compatibility with key switches, provide flexibility and customization to meet specific needs.