Accentra 4790LN Monroe Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$925.00
$716.21
Yale Commercial Yale 4790LN Monroe Grade 1 Fail Safe Electrified Cylindrical Lever Lock YAL-MO4790LN

Accentra 4790LN Monroe Grade 1 Fail Safe Electrified Cylindrical Lever Lock

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Model: YAL-MO-4790LN-626
From the 4700 Series Collection
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$925.00
$716.21
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Accentra 4790LN Monroe Grade 1 Fail Safe Electrified Cylindrical Lever Lock

Professional Grade 1 Cylindrical Lock Solution

The Accentra 4790LN Monroe cylindrical lever lock delivers Grade 1 performance for demanding commercial applications with fail safe electrified operation. This heavy-duty lock features adjustable door thickness from 1-3/8" to 1-3/4", 2-3/4" standard backset, and 1/2" stainless steel latchbolt throw. ANSI/BHMA Grade 1 certified and UL fire-rated up to 3 hours, this lock provides reliable security with professional Monroe lever design and heavy-gauge steel mechanism construction.

Professional Features & Benefits

  • ANSI/BHMA: A156.2, Series 4000 Grade 1
  • UL-cUL: UL-cUL fire-rated up to 3 hours
  • Windstorm: 4700LN Certified (refer to local codes)
  • Mechanism: Heavy-gauge steel, die-cast, zinc-plated, chromated
  • Backset: 2-3/4" standard
  • Latchbolt: 1/2" stainless steel throw standard
  • Guardbolt: Deadlocks latchbolt when door is closed; standard on all locking functions
  • Door Thickness: 4700LN adjustable from 1-3/8" to 1-3/4". 4700 adjustable from 1-3/4" to 2"
  • Fronts: 2-1/4" x 1-1/8" beveled standard; flat fronts available to order
  • Cylinders: Brass, 6-pin, keyed-random cylinder with two keys furnished standard, 7-pin not available.
  • Reversibility: Non-handed
  • Strikes: ANSI strike 4-7/8" x 1-1/4" x 1-1/4" lip to center supplied standard. Optional T-strike available to order for 4700LN.
  • Finishes: 4700LN available in 7 finishes, 4700 available in satin stainless steel (630) only.
  • Warranty: 5-year mechanical

Installation & Operation

  1. Verify electrical requirements match available power supply for electrified operation. Confirm voltage 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 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 application requirements.
  6. Restore power and test all functions including normal operation, electrified functions, and integration with connected access control systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Accentra Quality?

Accentra cylindrical lever locks deliver professional-grade reliability with heavy-gauge steel construction and Grade 1 certification for demanding commercial applications. UL fire-rated up to 3 hours with 5-year mechanical warranty for added confidence and protection. Engineered for demanding commercial applications where dependable performance and code compliance are essential.

Product Specs

Series:
4700 Series
Subcategory:
Cylindrical
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Commercial/Residential:
Commercial
Electronic:
Yes
Lock Type:
Cylindrical
Handle Type:
Lever
Product Attribute:
Cylindrical Locks
Product Model:
YAL-4790LN
Collection:
4700 Series
Lever Design Name:
Monroe Lever
Product Category:
Mechanical Locks
Department:
Door Hardware

Accentra YAL-MO-4790LN-626 – Frequently Asked Questions

1) Will the Accentra 4790LN fit a 1-3/4 inch door?
Yes. The 4790LN Monroe electrified cylindrical lever lock is built on the 4700LN chassis, which adjusts from 1-3/8 to 1-3/4 inches, so a standard 1-3/4 inch commercial door is covered and so is an older 1-3/8 inch interior door. If your doors run thicker than 1-3/4 inches, up to 2 inches, that is the plain 4700 chassis rather than the LN, and the 4700 comes only in satin stainless steel (630).
2) What happens to the Accentra 4790LN lever lock when the power drops?
Fail safe: cut the power and the outside lever unlocks. That is the right choice on an egress or stair-side opening where people have to get through in an outage, and the wrong choice on a storeroom or IT closet you need secured when power is lost. If you need it to stay locked with no power, you want a fail secure version, not the 4790LN.
3) Will the Accentra 4790LN latch into the strike already in my frame?
It ships with the ANSI strike, 4-7/8 by 1-1/4 with a 1-1/4 inch lip to center, and the latchbolt has a 1/2 inch stainless steel throw. If your frame is already prepped for a standard ANSI 4-7/8 strike, the existing cutout takes it. A T-strike is available to order on the 4700LN if your frame is prepped that way instead.
4) Is the Accentra 4790LN backset 2-3/8 or 2-3/4?
2-3/4 inches standard. That is the deeper of the two common commercial backsets, so measure from the door edge to the center of the existing 2-1/8 inch bore before you order. A 2-3/8 inch prep will not line up.
5) What cylinder and keys come with the Accentra 4790LN, and can I get it 7-pin?
A brass 6-pin keyed-random cylinder with two keys is furnished standard. 7-pin is not offered on this series, so if your facility is standardized on a 7-pin system you will need to plan on a different platform or key the openings separately. Keyed random means each lock arrives on its own key unless you order keying.
6) What is the closest equivalent to the Accentra 4790LN fail safe electrified lever lock from another manufacturer?
The Corbin Russwin CL33903 is the nearest peer: a Grade 1 fail safe electrified cylindrical lever lock, offered in a 12VAC/DC version under the CL33900 series. The Accentra 4790LN Monroe is also Grade 1 and fail safe, with a Monroe lever and adjustable door thickness of 1-3/8 inch to 1-3/4 inch on the 4700LN chassis. The Corbin Russwin CL33903 lists a door thickness range of 1-3/4 inch to 2 inch, so the two cover different door thicknesses - confirm the leaf thickness at the opening before choosing between them.
7) If the opening does not need electrified access control, what mechanical Grade 1 cylindrical lever lock covers the same duty?
For a keyed mechanical opening at the same duty level, the Dexter C1000 series is Grade 1 cylindrical with a door thickness range of 1-3/8 inch to 1-3/4 inch in its classroom, classroom security, and entry/office versions - the same thickness range the 4790LN Monroe covers on the 4700LN chassis. The Falcon K101 is a Grade 1 heavy duty fire-rated passage cylindrical lock adjusting from 1-3/8 inch to 2-1/4 inch where no keying is required. Neither carries the fail safe electrified function of the 4790LN.
8) Is a keypad leverset like the Lockey 2835 or Delaney LP250 a substitute for the 4790LN electrified lock?
They solve a different problem. The 4790LN Monroe is a fail safe electrified cylindrical lock that is wired to a power supply and released by an access control system, which is why it unlocks on loss of power. The Lockey 2835 is a mechanical pushbutton keyless lever lock with passage function and a 1-3/16 inch to 2 inch door thickness range, standing alone with no wiring. The Delaney LP250 is a Grade 2 electronic keypad leverlock, credential-based at the door rather than tied into a building access control head end. Choose the 4790LN when the opening must respond to a card reader or fire alarm release.
9) Do I have to specify handing on the Accentra 4790LN Monroe lever?
No handing to call out. The 4790LN is non-handed, so one part covers left and right swings, which is what you want when you are ordering a run of openings and do not have the door schedule in front of you.
10) What do I need besides the lock to make the Accentra 4790LN work with my access control?
It is an electrified lever lock, so the lock alone is not the system. You need a power supply matched to the lock's voltage and current draw, a path to get power into the door (a door loop or electric hinge), and whatever controls the circuit at the head end. Verify the electrical requirements against your available power before you cut anything in, and wire per the manufacturer diagrams. The mechanical side is a heavy-gauge steel, die-cast, zinc-plated and chromated mechanism.
11) Can a Grade 2 cylindrical lever lock be used where the 4790LN Monroe is specified?
Only if the spec allows Grade 2. The 4790LN Monroe is certified to ANSI/BHMA A156.2 Series 4000 Grade 1 and UL fire-rated up to 3 hours. Grade 2 cylindrical lever alternatives in the same form factor include the Hager 2580 storeroom lock with Withnell lever at 1-3/8 inch to 2 inch door thickness, the Cal-Royal AG05 storeroom lockset with deadlocking latchbolt at 1-3/8 inch to 1-3/4 inch, and the Falcon B511CP6D entry/office lever, a medium duty Grade 2 lock. All three are mechanical, so an opening that needs electrified release still requires the 4790LN.
12) What Grade 1 lever lock pairs with the 4790LN on the non-secured doors of the same project?
For unsecured openings finished to the same duty level, the Falcon K101 is a Grade 1 heavy duty fire-rated cylindrical passage lock with non-handed levers and a 1-3/8 inch to 2-1/4 inch door thickness range, and the Falcon T101 is a Grade 1 heavy duty cylindrical passage lever. The Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet cylindrical lever with a fire rating and a 1-3/4 inch to 2 inch door thickness. The 4790LN Monroe itself is non-handed and UL fire-rated up to 3 hours, so a Grade 1 passage lock keeps the run consistent on rated openings.
13) What Grade 1 dummy trim matches an opening set that includes the 4790LN Monroe?
An inactive leaf next to a 4790LN opening takes dummy trim, not a lock. The BEST 9K series 1DT single dummy trim cylindrical lever is Grade 1 heavy duty and non-keyed, keeping the inactive leaf at the same grade as the 4790LN Monroe, which is Grade 1. The BEST 7KC series 1DT single dummy trim is the Grade 2 medium duty version. Dummy trim has no latch and no electrified function, so it never substitutes for the 4790LN on a controlled door.
14) Is the Corbin Russwin 585F715 lever an alternative to the 4790LN Monroe?
No. The 585F715 is a Grade 1 lock lever for the ED8000 pushpad exit device and the CL3300 cylindrical lock series - it is the lever component, not a complete cylindrical lockset. The 4790LN Monroe is a full Grade 1 electrified cylindrical lever lock with a 1/2 inch stainless steel latchbolt, guardbolt, and an ANSI strike supplied standard. Order the 585F715 only when replacing trim on an existing device.
15) What Grade 1 cylindrical lock should be used on a patient room or holding room where the 4790LN would not be the right function?
An asylum or institutional opening needs a function with keyed operation on both sides. The Dexter C1000 series asylum lock (F87) is Grade 1 cylindrical with a 1-3/8 inch to 2 inch door thickness range. The Arrow MK33-BD-CS is an asylum/institution/utility cylindrical lock with a conventional cylinder in Schlage C keyway and a ball knob rather than a lever. The 4790LN Monroe is a fail safe electrified lever lock, so it belongs on doors released by access control, not on a room requiring key control on both faces.
16) What finishes does the Accentra 4790LN Monroe lever come in?
Eight finishes: bright brass (605), satin brass (606), satin bronze (612), dark oxidized satin bronze equivalent (613E), bright chrome (625), satin chrome (626), black suede powder coat (BSP), and white suede powder coat (WSP). If you are matching existing openings in a building, 626 satin chrome is the usual commercial default, and the two suede powder coats give you a painted-look match on black or white frames.
17) What is the difference between a beveled and a flat front on the Accentra 4790LN latch?
The 2-1/4 by 1-1/8 inch beveled front is what ships standard, and it suits a normal beveled door edge. Flat fronts are available to order if your door edge or existing latch prep is square. Check what is in the door now before you order the substitute.
18) Is the Monroe lever on the Accentra 4790LN the same shape as the other 4700 Series levers on my other doors?
Monroe is one specific lever design in the 4700 Series. If the rest of your openings were ordered as 4700LN with a different lever name, the chassis and prep are the same across the series but the lever shape and rose will not match visually. Ordering Monroe again is what keeps the building consistent.
19) The 4790LN Monroe finish needed is not one of the seven offered - what comparable lever lock covers a different finish range?
The 4790LN Monroe comes in bright brass 605, satin brass 606, satin bronze 612, dark oxidized satin bronze 613E equivalent, bright chrome 625, satin chrome 626, black suede powder coat, and white suede powder coat. For an architectural or residential-look opening in a decorative finish, the Baldwin Estate 5103 lever with 5048 rose comes in passage, privacy, and half dummy in both hands, and the Emtek Classic and Arts and Crafts leversets cover decorative dummy pairs. Those are non-electrified and not Grade 1 commercial locks, so use them only where the 4790LN function is not required.
20) What privacy-function lever works alongside a 4790LN Monroe on restroom or bedroom doors in the same building?
The 4790LN Monroe is a keyed electrified function and is not used for privacy. On restroom and bedroom doors, the Hager 2540 is a Grade 2 privacy cylindrical lock with the Withnell lever at 1-3/8 inch to 2 inch door thickness, and the Kwikset 300BRNL Breton privacy leverset is Grade 3 covering 1-3/8 inch to 1-3/4 inch. The Arrow MK02-TA is a privacy cylindrical lock with a Tudor knob rather than a lever, which matters where lever operation is required for accessibility.
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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 Accentra YAL-MO-4790LN-626 come with a warranty?
Absolutely. The Accentra YAL-MO-4790LN-626 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 Accentra YAL-MO-4790LN-626?
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