LCN 4642-POWDER Electrohydraul...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$8,230.00
$4,813.16
LCN 4642-POWDER Electrohydraulic Auto Equalizer Power Operator 120V, Aluminum (689) finish, long arm, surface-mounted, push side - front view

LCN 4642-POWDER Electrohydraulic Auto Equalizer Power Operator 120V with Powder Coat Finish

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Model: 4642-REGARM-689
$8,230.00
$4,813.16
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$8,230.00
$4,813.16
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LCN 4642 Electrohydraulic Auto Equalizer Power Operator - 120V, Powder Coat Finish

The LCN 4642 Auto Equalizer is a push-side, top-jamb surface-mounted low-energy automatic door operator built for commercial doors requiring 120V operation. The electrohydraulic unit features a cast iron body with a 1-1/2" diameter piston and 3/4" diameter double heat-treated pinion journal. It accommodates doors from 36" to 54" wide with adjustable spring sizes 2-5. ANSI A117.1 and ADA compliant in power mode; operates as a standard door closer during power outages for uninterrupted fail-safe performance.

Key Features

  • Door Width: 36" to 54" - interior doors up to 4'6" wide, exterior doors up to 3'6" wide
  • Heavy-Duty Construction: Cast iron body with 1-1/2" piston and 3/4" double heat-treated pinion journal
  • Power Operation: 120V; powered opening to 90°, manual opening to 100°
  • Fail-Safe: Functions as a standard door closer during power outages
  • Low-Energy Design: No guard rails or safety mats required - simplifies installation and ADA compliance
  • Advanced Controller: Independent adjustment of opening speed, opening force, hold-open time, electric strike delay, safety scanner lockout, alternate action timeout, sequential trigger timing, and 90° slowdown
  • Weather Resistance: All-weather fluid; 100-hour salt spray certified
  • Certifications: ANSI A117.1, ANSI A156.19, UL 10C; ADA compliant in power mode
  • BAA Qualified: Meets Buy American Act requirements for government installations
  • Warranty: 2 years

Technical Specifications

  • Series: LCN 4640 Series
  • Model: 4642
  • Voltage: 120V
  • Mounting: Surface Mount - Top Jamb, Push Side
  • Closer Size Range: 2, 3, 4, 5 (adjustable)
  • Door Opening: Up to 180°
  • Finish Type: Powder Coat
  • Body Material: Cast Iron
  • Fluid Type: All-Weather
  • Hold Open: Yes
  • ADA Compliant: Yes (power mode)
  • BAA Qualified: Yes
  • Commercial Use: Yes

Typical Applications

  • Healthcare facilities and hospitals
  • Educational institutions (K - 12, universities)
  • Government and municipal buildings
  • Commercial office buildings and retail
  • ADA-compliant entrance systems
  • High-traffic commercial doorways
  • Multi-family and hospitality properties

Available Options

Configure this listing by selecting Finish (689 Aluminum, 690 Statuary Bronze, 691 Light Bronze, 693 Gloss Black, 695 Dark Bronze, 696 Brass), Arm (Regular or Long), and Switch type (Visible On/Off with Hold Open, or Concealed On/Off without Hold Open). Refer to the LCN 4640 Series catalog section and the Choosing the Right Automatic Operator selection guide linked in the product documents.

Product Specs

Series:
4640 Series
ADA Compliant:
Yes
BAA Qualified:
Yes
Mounting Detail:
Surface - Top Jamb (Push Side)
Warranty:
2 Year
Closer Size:
2
Mounting Location:
Push Side
Subcategory:
Power Operators - Electrohydraulic
Product Group:
Door Controls
Product Subgroup:
Power Operators
Product Type:
Power Operators - Electrohydraulic
Finish Type:
Powder Coat
Fluid Type:
All-Weather
Commercial/Residential:
Commercial
Electronic:
Yes
Closer Size:
3
Closer Size:
4
Closer Size:
5
Product Model:
4642
Product Voltage:
120V
Door Opening Size:
90 Degrees (Powered)
Hold Open Feature:
Yes
Mounting Method:
Surface Mount
Product Category:
Door Controls
Product Substrate:
Iron
Department:
Door Hardware

LCN 4642-REGARM-689 – Frequently Asked Questions

1) Where does the LCN 4642 mount, and does it need room on the pull side of the door?
It mounts on the push side, top jamb, surface applied to the head frame. Nothing lands on the pull side, so pull-side conditions like a narrow vestibule or an adjacent wall return do not rule it out. What does matter is head frame face height and reveal at the jamb, since the operator body sits on the frame face above the door. If your opening is a pull-side application, this is the wrong mounting configuration and you want a different operator arrangement.
2) What happens to the door if the power goes out on an LCN 4642 operator?
The door keeps working. When the 120V supply drops, the 4642 reverts to functioning as a standard door closer, so the opening still closes and latches under spring power and the door is never dead in the frame. That fail-safe behavior is why the unit is electrohydraulic rather than motor-driven: the same hydraulic body that controls the closing cycle in power mode does the job unpowered. Worth knowing for a facilities team: ADA compliance is claimed in power mode, so during an outage the opening reverts to manual push force.
3) Do I need guard rails or safety mats with the LCN 4642 power operator?
No. The 4642 is a low-energy operator, and low-energy units do not require guard rails or safety mats the way full-power automatic operators do. That is the practical reason most schools, clinics and municipal buildings specify low energy for interior barrier-free openings: the install is a header-mounted operator and an actuator, not a guarded floor zone. The unit is ANSI A156.19 compliant, which is the low-energy operator standard.
4) Do I order the regular arm or the long arm for an LCN 4642?
The arm choice follows the reveal, the distance from the face of the door to the face of the frame where the operator sits. Deeper reveals need the long arm (LONG), which ships with a long rod and shoe; standard shallow-reveal top jamb conditions take the regular arm (REGARM). Measure the reveal at the head before you order, because the arm is an ordering option, not something you swap in the field without buying the other assembly. Both arms are offered across all six finishes and both switch configurations.
5) Does the LCN 4642 qualify for a federal or government job with Buy American requirements?
Yes. The 4642 is BAA qualified, meeting Buy American Act requirements, which is what a government, military or federally funded municipal spec needs to see before the operator can go on the submittal. It also carries ANSI A117.1, ANSI A156.19 and UL 10C, and is ADA compliant in power mode, which covers the accessibility and fire door assembly side of the same submittal package.
6) What is the difference between the visible on/off switch and the CS concealed switch on the LCN 4642?
It comes down to whether you want staff or the public able to turn the operator off. The default configuration gives you a visible on/off switch plus a hold open switch, so a nurse or front desk can put the door on hold open during deliveries or shift change and shut the automatic function off. The CS option conceals the on/off switch and drops the hold open switch entirely. Schools, courthouses and anywhere the public reaches the header generally want CS so nobody can defeat the operator; back-of-house and staff-controlled openings usually want the visible switch for the hold open.
7) How far does the LCN 4642 open the door under power, and can it be pushed open further by hand?
Powered opening runs to 90 degrees. Push it by hand and it will go to 100 degrees, and the door can swing up to 180 degrees overall where the opening allows. That 90 degree powered stop is worth checking against your traffic: if you need a wheelchair or a gurney through and there is a wall return or a stop limiting swing, the door needs a clear 90 degrees to reach its powered position. There is also a 90 degree slowdown adjustment on the controller so the door does not slam into its own backcheck at the end of the powered stroke.
8) Can the LCN 4642 be used on an exterior door in a cold or coastal climate?
Yes, within the 3'6" exterior width limit. The unit runs all-weather fluid, so the hydraulic viscosity does not swing enough between a January morning and an August afternoon to throw off the closing speed the way standard fluid does. The body is cast iron and the assembly is certified to 100 hours of salt spray, which is the relevant number for coastal and de-icing-salt exposure. The powder coat finish is the exterior-appropriate choice over a plated finish for the same reason.
9) Can I set the hold open time and opening speed on the LCN 4642 after it is installed?
Yes, and the adjustment list is unusually deep for a low-energy operator. The controller lets you independently set opening speed, opening force, hold open time, electric strike delay, safety scanner lockout, alternate action timeout, sequential trigger timing, and the 90 degree slowdown. Electric strike delay and sequential trigger timing are the two that matter most on a card-reader opening: they let the strike release fully before the operator starts pulling, so the latch is not dragged against the keeper. Spring size is separately adjustable across sizes 2 through 5.
10) I need 120 volt power at the door head for the LCN 4642, or will low voltage do?
The 4642 is the 120V model of the 4640 Series, so the electrician needs to bring line voltage to the header, not a low voltage run. Plan that circuit before the frame goes in, because a surface top jamb operator has the electrical connection at the head frame. Actuators, card readers and electric strikes wire to the operator's controller, which handles their timing, but the operator itself is fed at 120V.
11) What finishes does the LCN 4642 Auto Equalizer come in, and will they match the closers already on my other doors?
Six powder coat finishes: 689 Aluminum, 690 Statuary Bronze, 691 Light Bronze, 693 Gloss Black, 695 Dark Bronze and 696 Brass. Those are standard LCN closer finish numbers, so if the existing closers in the building are 689 or 695, ordering the operator in the same number lines the header hardware up visually. All six are available with either arm and either switch configuration, so finish never constrains the rest of the configuration.
12) Is the LCN 4642 built for a high traffic entrance, or is it a light duty operator?
It is built heavy. Cast iron body, a 1-1/2 inch diameter piston, and a 3/4 inch diameter double heat-treated pinion journal, which is the part that takes the abuse when someone shoulders the door open against the operator. That construction is why it goes into hospital corridors, K-12 and university buildings, and government entrances rather than light commercial only. It is a commercial-rated unit, not a residential one.
How fast can I get the LCN 4642-REGARM-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 4642-REGARM-689 come with a warranty?
Absolutely. The LCN 4642-REGARM-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 4642-REGARM-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 4642-REGARM-689 from ZenSupply?
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Product Reviews

  • 5
    LCN 4642 Auto Operator

    Posted by Chris Cloutier on Dec 11th 2025

    Easy to install customer is very please with product

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