2-3/8" or 2-3/4"
1"
2-3/8"
Lock Components
1. Prepare the door and check dimensions
Key
Keypad
LED indicator
Emergency Type-C backup
Exterior Assembly
Plastic box
Strike plate
Screw
Latch
Interior Assembly
Mounting Screws
Reset Key
Connector
Interior Cover
Required tools （not included）
Ruler
Philips head screwdriver
Hammer
Chisel
Use template to mark holes Drill two holes Check dimenslons
4.Install the batteries and perform
the door handing process
5.Install the interior cover
feed power cable through hole in knob and guide spindle into knob.
Align the exterior keypad with the bore hole. Feed the power cable through latch.
The spindle on the exterior keypad should be aligned with the hole in the center
of the latch. Insert the spindle through this hole as you press the exterior keypad
against the door.
Adjust the latch to the distance you are going to install, 2-3/8" or 2-3/4"(Backset 2-3/8” or 2-3/4”)
If the spindle holes of the latch are not aligned, repeat the 2-3/8" and 2-3/4" positions. This will automatically align the latch spindle holes.
Bore 1'' diameter
hole for latch
Bore 2-1/8''
diameter hole
Template
Backset
must match lock (2-3/8'' or 2-3/4'')
2.Install the latch and strike
Install latch
Install strike plate
3.Install the exterior keypad and the interior assembly
Setting latch（60MM or 70MM）
Install the exterior keypad
Install the interior assembly
Pull out the power cable
2-3/4"
+
-
+
-
+
-
+
-
2-1/8''
BOTHSTAR
IU-20 SMART DOOR KNOB
Installation and User Guide
Features
. two ways to access: code and key
. -22 F to +176 F temperature range
. Low power consumption, 4 AA for 2 Years Battery Life or 20,000 times unlock
. Backlit keypad for use in low light environments
. 1 master code and 50 user codes
. Passage mode for hassle-free entry
. Color LED indicator lights up to show when codes and commands have been successfully entered
. Built-in disguise feature to protect your codes from prying eyes
. Low battery warning indication
Programming guide
Indicator light signals and beep
This function is an added security feature which is aimed at preventing
passcode theft. With Passcode Disguise, you may enter 40 digits into the
keypad. As long as the correct passcode sequence is entered, regardless
of how many digits were entered before or afterwards, the lock will unlock.
For example, if your user passcode is “112256“, you can successfully
Passcode and Passcode Disguise
. The master code MUST EXIST and can be modified, but cannot be deleted.
. The lock comes preset with default master passcode 123456
. Used to put the lock in programming mode.
. Can unlock the lock
. Must be different from all of the User Codes currently in the lock.
If you forget the master passcode, you can reset the lock to factory
settings,which restores the default master passcode. See Restore Factory
Settings
. User codes can be added, modified, deleted.
. The lock comes not preset any User Code
. Used to unlock the lock
. Must be different from the master passcode and other user passcodes
. Up to 50 possible User Codes can be stored in the lock at one time.
Master passcode User passcode
To delete all user codes, including the master code, follow the instructions
below:
1. Use a screwdriver to remove the screws from the interior cover.
2. Remove the cover and find the reset button located on the battery pack.
3. Press and hold the reset button for 7 seconds until long beep are heard. The
master passcode will return to the manufacturer default code '123456'.
Restore Factor y Settings
After restore factory ,
possible! because of the master passcode can unlock the door.
Change the master passcode as soon as
7S
Keypad
IULOCK
Check botton
LED indicator
The color of the light indicates & beep ,the status of the lock.
. a correct master passcode or user passcode was entered ,one long beep
. the programming process is complete ,one long beep
. an incorrect master passcode or user passcode was entered,three short beep
. there was an error in programming, three short beep
. red blinking and beep after keypad backlit off indicates critically low battery
Green
Red
Control of the lock is simply 4-16 digit master passcode or 4-16 digit User passcode.
Passcode Disguise
Key
Pay attention to on the spindle "THIS SIDE UP”
Do not pull the power cable too hard
T
H
I
S SI
DE UP
Unlock with passcode
Unlock with key
ENTER
PRESS
master code or user code
Green and one long beep
Red and three short beeps
Code correct, you can turn the knob to open the door immediately,
and it will be automatically locked later (the automatic locking time
depends on the setting of the automatic locking timer, the default is
4 seconds).
The code is incorrect, please re-enter the correct code and press the check
button to confirm
Insert the key on the outside keypad and twist. The first quarter turn
should be very easy. After that you are retracting the latch by the force
you apply with the key.It takes a little bit of effort. Twisting the knob at
the same time you are turning the key helps a little too.
Note:
The mechanical key of this electronic door knob is completely
independent, because the knob is relatively heavy, so using the key
requires a little more force than the common mechanical lock.
After tightening the 2 fixing screws, the knob should be easily turned by hand.
After your hand leaves the inside knob, the inside knob should easily return to
the original position.
If not, please re-adjust the position of the inside knob and tighten the screw.
M4X10
M4X40
M4X20
IULOCK
Programming
Lifetime Limited Mechanical and Finish Warranty and 1-Year Limited Electronics Warranty Subject to the terms and
conditions of the warranty, IULOCK extends a lifetime limited mechanical and finish warranty and a one-year limited
electronics warranty to the original consumer user (“Original User”) of our IULOCK brand product (“Product”)
against defects in material and workmanship, as long as the Original User occupies the residential premises upon
which the Product was originally installed.See answers www.iulock.com for specific warranty details and limitations
Warranty
Important Safeguards
1. Read all instructions in their entirety.
2. Familiarize yourself with all warning and caution statements.
3. Remind all family members of safety precautions.
4. Protect your user passcode and master passcode.
5. Dispose of used batteries according to local laws and regulations.
This Manufacturer advises that no lock can provide complete security by itself. This lock maybe defeated by forcible or technical means. or
evaded by entry elsewhere on the property. No lock can substitute for caution, awareness of your environment, and common sense. Builder's
hardware is available in multiple performance grades to suit the application. In order to enhance security and reduce risk, you should consult
a qualified locksmith or other security professional.
WARNING:
I cannot insert the spindle into the latch hole, because of the 2 sides of the spindle hole of the latch are not aligned?
Let the hole parts move a few times in the 2-3/8 and 2-3/4 positions and the spindle holes of the latch will automatically align.
Why is it beeping after keypad light off?
The battery may be low. Please replace the battery.
The lock doesn't work?
Try replacing the battery or using the backup battery. If the lock still does not work, contact customer support.
Why can't I open the door?
You may be waiting too long to open the door. After entering a code, turn the handle to open the door while the lock LED indicator light is green.
Once the LED indicator light is off, the lock will return to locked position immediately.
Why I can open without passcode?
You maybe active the passage mode, use master code access will turn off this function .
If you just installed it, make sure the "THIS SIDE UP" on the spindle is facing up (ceiling).
I forgot all my codes.
The lock must undergo a hard reset in order to set the master code back to default and erase all other codes. In order to perform a hard
reset,please refer to the above “Restore Factory Settings”.
If none of the above information resolves your issue, please visit our website at: www.iulock.com
Troubleshooting
Template
www.iulock.com
24hr online service
DEL
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Φ1inch
1-3/ 8inch
to
2-1/ 2inch
2-3/ 8inch
2-3/ 4inch
Φ2inch
ADD
ING U
SE
R P
A
S
SCO
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N
ot
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as
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m a
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master passcode
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New user passcode
master passcode
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master passcode
master passcode
master passcode
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D
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Th
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S
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TO
-LOCK T
I
MER
Pr
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s
Pr
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Enter
Pr
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Pr
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s
Pr
es
s
Pr
e
ss
master passcode
master passcode
master passcode
master passcode
Pr
e
ss
En
ter
master passcode
auto-lock timer
»If you make a mistake during programming,press the check button repeatedly until the keypad lights up. Then start
PASSCODE
PASSAGE
BEEPER
AUTO-LOCK
PASSCODE
PASSAGE
BEEPER
AUTO-LOCK
