A.1, 8/01 Page 1 SECURITRON MODEL MUNL-12, MUNL-24 MORTISE UNLATCH INSTALLATION AND OPERATING INSTRUCTIONS 1. DESCRIPTION Securitron’s Mortise 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 Mortise UnLatch also presents a fully concealed appearance on the door which not only enhances architectural appeal 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 Mortise UnLatch functions with all North American mortise locks and includes a latch status output which reports when the door is in latched (secure) condition or is open. Product Specifications are: Input Voltages: 12 VDC (MUNL-12), +20%, -10%. 24 VDC (MUNL-24), +20%, -10%. Current: At rest: 40 mA (either voltage). When operating- 4 Ampinput surge @ 12 VDC; 2 Amp input surge @24 VDC for 100 milliseconds and 600 mA @ 12 VDC or 300 mA @ 24 VDC during motor movement. Operating Temperature: -10° to 125° F. FIG 1: MORTISE UNLATCH DIMENSIONS (INCHES) 1.25 1.25 1.88 3.50 3.38 RECOMMENDED TOOLS 4.88 SPRINGLATCH PLUNGER DEADLATCH FINGERS MEDIUM + SMALL PHILLIPS DRIVER MEDIUM SLOTTED DRIVER CHISEL, 5/64 ALLEN WRENCH WIRE CUTTER/STRIPPER VOLT/OHM METER CRIMP CONNECTORS CRIMP PLIERS 2. PHYSICAL INSTALLATION 2.1 SURVEY The installer must first be sure that the latch is of the mortise type (see the drawing to the right.) A mortise lock (or latch) includes a square shaped springlatch and a “pin” called the deadlatch pin or guard bolt which may be positioned either above or below the springlatch. Most mortise panic bar latches are also perfectlycompatible with the MUNL. Note, however, that if the mortise lock assembly includes a dead bolt, the dead bolt will not be operableThe most common alternate type of latch in use in North America is called cylindrical, tubular or bored. The standard UnLatch (modelnumbers UNL-12 and UNL-24) is designed for this alternate type of latch. Securitron does not offer an UnLatch solution for a rim latch (rim latches are on the surface of the door rather than being mortised into the middle of the door). Deadlatch Pin Springlatch . Copyright, 2001, all rights reserved • Securitron Magnalock Corp., 550 Vista Blvd., Sparks NV 89434, USA Tel: (775) 355-5625 • (800) MAGLOCK • Fax: (775) 355-5636 • Website: An ASSA ABLOY Group company Rev. A.1, 8/01 Page- 2 2.2 HOLLOW METAL (STEEL) FRAME MOUNTING Remove the existing ANSI 4 7/8” strike plate (it will be discarded) and experimentally try to fit the Mortise UnLatch in the resulting cavity. In some cases the cavity will be large enough to accommodate the Mortise UnLatch and you will have nothing to do but pull the wires up the hollow door frame and screw the Mortise UnLatch into place. In other cases you will find a“dust box” within the frame that will get in the way of the Mortise UnLatch. The dust box must be cleared away to make room. Generally, a sabre saw, dremel tool or a drill with a fly cutting bit is the most effective tool to do this. You can also find that the edge of the dry wall panel interferes with the Mortise UnLatch. Simply chip away some of the dry wall with a screwdriver. Once you are able to fit the Mortise UnLatch into the frame, vacuum out any concrete dust and metal shavings (these can work their way into the UnLatch mechanism and cause problems) and loosely mount it and proceed to Section 2.4, adjusting for latch/deadlatchlocation. Note that the face of the Mortise UnLatch is protected by a removable film. Leave this on during the “pre-mounting” so as to preserve the metal finish against scratching and to block the possible entry into the mechanism of dust or metal shavings. Remove the film when you adjust the unit for latch/deadlatch location (Section 2.4). 2.3 WOOD FRAME MOUNTING For installation in a wood frame use a chisel to create a space for the Mortise UnLatch behind the existing strike. Remove the strike and place the template (last page of this manual) on thedoor (registering it to the strike mounting holes). This will show you the space that must be chiseled out. As you get close to finishing the chiseling job, experimentally try to fit the body of the Mortise UnLatch in the cavity. This will avoid chiseling too big a space. A tight fit ispreferred as it helps the solidity of the mounting. Normally, with a wood frame, the wires will be run inside the wall. Simply drill from the back of the cavity you have created rearward into the wall space to admit the wires. To mount the Mortise UnLatch to the wood frame, use the two #12 x 1” furnished flat head wood screws. Once you are able to fit the Mortise UnLatch into the frame, vacuum out any wood dust and metal shavings (these can work their way into theUnLatch mechanism and cause problems) and loosely mount it and proceed to Section 2.4, adjusting for latch/deadlatch location. Note t...