LCN SEM7820 Floor-Mounted Heav...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,045.00
$669.57
LCN LCN SEM7820 Floor-Mounted Heavy Duty Door Holding Magnet - Powder Coat Finish LCN-SEM7820

LCN SEM7820 Floor-Mounted Heavy Duty Door Holding Magnet with 35 Pound Holding Force

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Model: SEM7820-689
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,045.00
$669.57
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LCN SEM7820 Floor-Mounted Heavy Duty Door Holding Magnet with 35 Pound Holding Force

Professional Fire Safety Door Control Solution

The LCN SEM7820 is a floor-mounted heavy duty door holding magnet from the Sentronic 7800 Series, engineered for fire safety applications. This fail-safe magnetic door holder provides 35 pounds of holding force through tri-voltage design and automatically releases when fire alarm systems interrupt electrical current. The unit features die-cast housing construction with powder coat finish and meets ANSI/BHMA A156.15 standards with UL listing for metal smoke barrier and labeled fire doors.

Professional Features & Benefits

  • Heavy-Duty Holding Force: Tri-voltage design delivers 35 pounds of holding force for reliable door positioning in commercial applications.
  • Fail-Safe Fire Safety Operation: Automatically releases when electrical current is interrupted during fire alarm conditions, allowing manual door operation until power returns.
  • Durable Die-Cast Construction: Heavy-duty die-cast housing with powder coat finish provides long-lasting performance in demanding environments.
  • Floor-Mounted Design: SEM7820 floor-mounted configuration offers versatile installation options for various door and frame configurations.
  • Fire Door Compliance: UL listed for metal smoke barrier and labeled fire doors with ANSI/BHMA A156.15 certification for code compliance.
  • Professional Installation Hardware: Includes wood and machine screw pack fasteners with optional armature extensions available for custom applications.
  • Manufacturer Warranty: Protected by 2-year warranty for added confidence and protection.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Verify electrical requirements match available power supply. Confirm voltage per specifications and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified floor location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including fail-safe operation per fire safety application requirements.
  6. Restore power and test all functions including normal holding operation, alarm release functions, and integration with fire alarm systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Building Fire Safety Systems
  • Healthcare Facility Smoke Barrier Doors
  • Educational Institution Fire Door Control
  • Industrial Facility Emergency Egress
  • Multi-Tenant Residential Fire Compliance
  • Government and Municipal Building Safety
  • Retail Fire Protection Systems

Why Choose LCN Quality?

LCN SEM7820 door holding magnets deliver professional-grade reliability with die-cast housing construction and UL listing for fire door applications. Protected by a 2-year warranty with ANSI/BHMA A156.15 certification for demanding commercial fire safety applications. Engineered for dependable fail-safe operation where fire code compliance and reliable performance are essential.

Product Documentation & Resources

Product Specs

Series:
SEM 7800 Series
ADA Compliant:
Yes
Mounting Detail:
Surface - Magnet
Warranty:
2 Year
BAA Qualified:
Yes
Subcategory:
Fire and Life Safety Closers
Product Group:
Door Controls
Product Subgroup:
Electromagnetic Door Holder / Releases
Product Type:
Door Magnets
Door Type:
Interior Door
Finish Type:
Powder Coat
Commercial/Residential:
Commercial
Electronic:
Yes
Product Model:
SEM7820
Product Voltage:
12V/24V/120V
Mounting Method:
Floor
Product Projection:
6-3/4"
Product Category:
Door Controls
Department:
Door Hardware

LCN SEM7820-689 – Frequently Asked Questions

1) What is the LCN SEM7820 floor-mounted door holding magnet used for?
The SEM7820 is designed to hold heavy commercial doors in the open position. It mounts flush in the floor and uses electromagnetic force to secure doors when activated. Common applications include hospitals, schools, offices, and retail spaces where fire safety requires automatic door release capability.
2) What door weights and sizes is this magnet compatible with?
This heavy-duty model typically handles commercial-grade doors up to 200+ pounds. Verify your specific door weight and dimensions against manufacturer specifications. Door material should be ferrous metal or have a steel plate installed for proper magnetic contact.
3) Does this magnet work with both left and right-hand doors?
Floor-mounted magnets are typically universal for door handing. The magnet installs in the floor at the desired hold-open position regardless of door swing direction. Verify the door's hold-open angle and positioning during planning.
4) What finish options are available for the SEM7820?
LCN typically offers standard finishes like aluminum, bronze, and stainless steel for floor-mounted units. The visible portion should match your door hardware finish. Check current availability for specific finish codes and lead times.
5) What voltage does this electromagnetic door holder require?
Most LCN electromagnetic holders operate on 12V or 24V DC power. Verify the exact voltage requirement for your model. A transformer may be needed to step down from line voltage. Power consumption is typically low during normal holding operation.
6) Does this magnet meet fire safety code requirements?
LCN electromagnetic holders are designed to integrate with fire alarm systems for automatic release. When power is cut during a fire alarm, the magnet releases the door for automatic closure. Verify local code compliance and integration requirements with your fire safety system.
7) What installation accessories come with the SEM7820?
Standard packages typically include the magnet housing, mounting hardware, and basic wiring connections. You may need to purchase door-mounted strike plates or armature plates separately. Review the complete parts list and order missing components before installation.
8) How is the floor-mounted magnet installed?
Installation requires cutting a precise recess in the floor to accommodate the housing. The unit sits flush with the floor surface. Electrical connections must be made to the control circuit. Use the manufacturer's template for accurate positioning and dimensions. Professional installation recommended.
9) What maintenance does this electromagnetic holder need?
Keep the magnet face clean and free of debris. Test the release function monthly by removing power. Check that doors fully close when the magnet releases. Inspect wiring connections periodically. Replace any damaged armature plates on the door bottom.
10) Are there similar LCN models I should consider?
LCN offers various electromagnetic holders including wall-mounted and overhead models. Consider door weight, mounting constraints, and aesthetic preferences when selecting. Browse our door hardware section for alternative mounting configurations.
11) Can this magnet be used in outdoor or wet conditions?
Floor-mounted units have limited weather resistance due to their installation method. Exterior applications require proper drainage and weatherproofing. Consider moisture ingress and freeze-thaw cycles that could affect performance. Consult manufacturer specifications for environmental ratings.
12) What are the key measurements I need before ordering?
Measure door weight, floor thickness, and available space for the housing recess. Note the door's hold-open angle and the distance from hinge to magnet contact point. Verify electrical access for wiring. Check floor construction material for compatibility with cutting and mounting.
How fast can I get the LCN SEM7820-689 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN SEM7820-689 come with a warranty?
Absolutely. The LCN SEM7820-689 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN SEM7820-689?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN SEM7820-689 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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