Assa Abloy Securitron UnLatch Installation & Operating Instructions Manual Download Page 3

of 8

Final Adjustment with Spacers 

Reliable Operation

The door needs to close so that the latch easily enters and is retained by 

the Securitron UnLatch. The door should not have to be pushed to engage 

as can be the case with a poorly fitting or poorly closing door. 
To check this point, when the Securitron UnLatch has been mounted, after 

the door is closed and latched, you should be able to “rattle” the latch against 

the Securitron UnLatch plunger by pushing the door in and out. 

The amount 

of movement in the door latch should be about 1/16-1/8” [1.5-3 mm]. 

If the amount of slack or rattling is greater than 1/16-1/8"

You need the door to “close earlier”. In effect, the edge of the stop 

needs to be closer to the Securitron UnLatch. To adjust for this: 

CHECK to see if the stop has “silencers” on it. These are cylindrical 

rubber bumpers which quiet the noise of a closing door but 

also have the effect of making the door close earlier. 

• If you have silencers 

and the door is still rattling too much, contact the factory 

for additional door stop spacers (the Securitron UnLatch is shipped with two). 

• If you don’t have silencers

, add one or two door stop spacers as 

is shown in 

Diagram 5

 to cause the door to close earlier 

If the amount of slack or rattling is less than 1/16-1/8"

You have a “tight” door and the ability of the door to close 

and latch reliably is in question. To adjust for this:

CHECK to see if the stop has “silencers” on it. These are cylindrical 

rubber bumpers which quiet the noise of a closing door but 

also have the effect of making the door close earlier. 

REMOVE the silencers (they pull out) and this will add slack to the closed position 

of the door. Be sure to check the entire length of the door for the silencers. If the 

door has no silencers and is still tight in latching, a locksmith should be engaged to 

readjust the door so that it closes properly or the installation will not be reliable.

STOP

1/16"

ANSI 2-3/4" 

STRIKE

Set the horizontal position of 

the Securitron UnLatch so 

that the separation of the two 

plungers is 1/16" farther from 

the stop than the vertical line 

you have drawn

Draw vertical line through 

edge of strike hole which 

captures latch

Draw horizontal 

line bisecting 

strike hole

Use this line to 

center the Securitron 

UnLatch vertically

NOTE:

 Template is marked to set vertical 

and horizontal alignment

Diagram 4 

Mounting on wood door with ANSI 2-3/4" strike

Diagram 5 

View of Securitron UnLatch 

looking straight into door frame

STOP

Silencer

Two 

Spacers

Open 

Cavity

Springlatch 

Plunger

Deadlatch

Plunger

Summary of Contents for Securitron UnLatch

Page 1: ... type which is also called tubular Examples of latch types on which the Securitron 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 Securitron UnLatch also will not function on mortise latches These are heavy duty rectangular units similar in appearance to warning above Aft...

Page 2: ... to fit the Securitron UnLatch into the frame vacuum out any concrete dust and metal shavings these can work their way into the Securitron UnLatch mechanism and cause problems 2 3 4 ANSI strike In the case of a 2 3 4 ANSI strike you will be using two new holes which are separated more widely to mount the Securitron UnLatch You will also have to perform two chiseling operations You will have to chi...

Page 3: ...agram 5 to cause the door to close earlier If the amount of slack or rattling is less than 1 16 1 8 You have a tight door and the ability of the door to close and latch reliably is in question To adjust for this 1 CHECK to see if the stop has silencers on it These are cylindrical rubber bumpers which quiet the noise of a closing door but also have the effect of making the door close earlier 2 REMO...

Page 4: ...atch pin rests on the deadlatch plunger which pushes in the deadlatch pin This maintains the latch in the secure position and makes full use of the deadlatching function When the Securitron UnLatch operates the trigger wire connects to the V wire the deadlatch plunger retracts into the body of the Securitron UnLatch which allows the deadlatch pin to move out Then both plungers simultaneously push ...

Page 5: ... bridge rectifier combination can be as high as forty volts the diodes are required to drop the peak voltage into the operable range for the UNL 24 Diagram 10 notes installation placement of the Zener diodes NOTE The addition of the Zener diodes is only required when using the Securitron UNL 24 with 24 VAC transformer and bridge rectifier When using the Securitron UNL 12 with 12 VAC transformer an...

Page 6: ... would be unable to do so because the dead latch pin would be pushed in by the metal casing of the Securitron UnLatch The motor would jam The Securitron UnLatch senses any motor jam condition and shuts itself down for that cycle but it is better not to operate at all unless the door is latched Operationally the door can be opened anyway it is not latched so there is no benefit to the end user from...

Page 7: ...rocessor will sharply drop and this can crash the microprocessor A crash can also occur as a random event but this is unusual There are two recovery methods that may be used to recover the unit s operation The first technique is a simple reset achieved by cycling power to the unit Remove power V from the unit s red wire momentarily After power is reapplied the unit may reset and begin normal opera...

Page 8: ...sionofHanchettEntrySystems Inc is prohibited 500 18300_5 Warranty For information on warranty coverage and replacement options please visit assaabloyesh com warranty Template 4 7 8 123 8 mm 4 1 8 104 8 mm 1 1 4 107 95 CENTER LINE Horizontal Alignment Arrows see Diagram 4 Dotted line shows area to chisel out 1 3 4 44 45mm deep for installation in wood frame DO NOT photo copy template Dimensions wil...

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