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Assa Abloy Securitron UNLATCH UNL-24 Installation And Operating Instructions Manual

Assa Abloy Securitron UNLATCH UNL-24 Installation And Operating Instructions Manual

Motorized electronic strike

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SECURITRON MODEL UNL-12, UNL-24 UNLATCH
ELECTRONIC STRIKE INSTALLATION AND OPERATING INSTRUCTIONS
1. DESCRIPTION
Securitron's UnLatch is a revolutionary new type of electric strike which eliminates the
necessity to perform a routing operation on the door frame for installation. The motor
driven UnLatch also presents a fully concealed appearance on the door which not only
enhances the architectural appeal of the installation but improves security over a conventional
electric strike as an intruder is less able to determine the type of security device present on the
door. The UnLatch functions with cylindrical dead latches or spring latches and includes a
latch status output which reports when the door is in latched (secure) condition or is open.
Product Specifications are:
(UNL-24), +20%, -10%. Current: At rest: 40 mA (either voltage). When operating- 3 Amp
input surge @ 12 VDC; 1.5 Amp input surge @24 VDC for 100 milliseconds and 300 mA @ 12
VDC or 200 mA @ 24 VDC thereafter. Operating Temperature: -10 F to 125 F.
4.87
4.12
3.37
3.38
2. PHYSICAL INSTALLATION
2.1 SURVEY
The installer must first be sure that the latch is of
the cylindrical type with or without the deadlatch
function. See Figure 2. Most North American latches
are of this type which is also called tubular. Examples
of latch types on which the UnLatch will not
function include many panic bar latches and rim
latches (rim latches are on the surface of the door
rather than being mortised into the middle of the
door). The UnLatch also will not function on mortise
latches.
These are heavy duty rectangular units
similar in appearance to the drawing on the right.
After determining that there is a cylindrical latch, the
installer must determine whether there is a wooden,
or hollow metal (steel) door frame and whether the type of strike present on the frame is of the
ANSI 2 3/4" type (found on many residential doors) or the ANSI 4 7/8" strike (commercial).
© Copyright, 2011, all rights reserved
Securitron Magnalock Corp.
Tel 800.624.5625
Input Voltages:
FIG 1: UNLATCH DIMENSIONS (INCHES)
1.245
www.securitron.com
techsupport@securitron.com
12 VDC (UNL-12), +20%, -10%.
RECOMMENDED TOOLS
MEDIUM PHILLIPS DRIVER
MEDIUM SLOTTED DRIVER
CHISEL
WIRE CUTTER/STRIPPER
1.50
VOLT/OHM METER
CRIMP CONNECTORS
CRIMP PLIERS
1.33
Page 1
ASSA ABLOY, the global leader
in door opening solutions
®
MOTORIZED
24 VDC
MORTISE LATCHES
WILL NOT FUNCTION
WITH THE UNLATCH
PN# 500-18300
Rev. D, 08/11

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Summarization of Contents

1. DESCRIPTION
Product Specifications
Details voltage, current, and operating temperature ranges for the UnLatch.
2. PHYSICAL INSTALLATION
2.1 SURVEY
Installer must verify latch type and frame preparation before installation.
2.2 HOLLOW METAL (STEEL) FRAME MOUNTING
Instructions for installing the UnLatch in hollow metal frames with 4 7/8" or 2 3/4" ANSI strikes.
2.3 WOOD FRAME MOUNTING
Procedure for installing the UnLatch in wood frames with 4 7/8" or 2 3/4" ANSI strikes.
2.4 FINAL ADJUSTMENT WITH SPACERS
Adjusting door closing tolerance for proper latch engagement and to reduce rattle.
3. OPERATION
3.1 LATCH AND DEADLATCH FUNCTION
Explains how springlatches and deadlatches work and their security implications.
3.2 UNLATCH PLUNGER ACTION
Describes the dual plunger mechanism and its role in securing/releasing the door.
4. WIRING
4.1 GENERAL ELECTRICAL CHARACTERISTICS
Details the six-wire configuration, power requirements, and trigger function.
Zener Diode Placement for UNL-24
Illustrates the placement of zener diodes for UNL-24 models with 24VAC transformers.
4.2 WIRE GAUGE SIZING
Guidance on selecting appropriate wire gauges based on distance to maintain torque.
4.3 LATCH STATUS SENSING
Explains the latch status output feature and its wiring (COM, NC, NO).
APPENDIX A: TROUBLESHOOTING
PROBLEM-- Unit Will Not Operate
Addresses issues with the trigger wire connection and door pre-loading.
PROBLEM-- Unit Will Occasionally Not Operate
Discusses problems related to door pre-loading and low power supply.
PROBLEM-- Latch Does Not Re-secure
Troubleshoots issues where the latch fails to re-secure after door closure.
PROBLEM-- Latch Status Sensing Does Not Function
Guides on diagnosing failures in the latch status output.