LETC LS99111010 User manual

USER
MANUAL
Wireless Programmable
Room Thermostat
Model No.: LS99111010
Scan for App
Heating is great
when you control it.

Contents
1. Overview ....................................................................................................... 01
2. System Installation ................................................................................... 02
2.1 Install and Wiring Receiver ........................................................................ 02
2.1.1 Install Receiver ................................................................................ 02
2.1.2 Wiring Receiver ............................................................................... 03
2.2 Activate Batteries and Install Thermostat .................................................. 06
2.2.1 Activate Batteries ............................................................................. 06
2.2.2 Install Thermostat ............................................................................ 06
2.3 System Check ........................................................................................... 07
2.3.1 RF Address Code Setting ................................................................ 07
2.3.2 RF Communication Check .............................................................. 12
3. Operation Thermostat .............................................................................. 13
3.1 Clock Setting ............................................................................................. 13
3.2 Program Setting ........................................................................................ 15
3.2.1 Pre-set Program .............................................................................. 15
3.2.2 To adjust the Pre-set Program ......................................................... 15
3.3 Override Mode ........................................................................................... 17
3.3 Manual Mode ............................................................................................. 18
3.3 Holiday Mode ............................................................................................ 19
3.3 ECO Mode ................................................................................................. 20
3.3 OFF Mode (Frost Protection) .................................................................... 21
3.3 Child Lock .................................................................................................. 21
4. User Option .................................................................................................. 22
5. User Options Table .................................................................................... 23
6. Product Specication ............................................................................... 24
6.1 Wireless Programmable Thermostat ......................................................... 24
6.2 Wireless Receiver ..................................................................................... 25
6.3 Wireless Wi-Fi Gateway ............................................................................ 25

11. Overview
▪ This wireless programmable room thermostat kit can be used to control heating boiler,
a variety of valves and actuators.Can be operated remotely via App. by smartphone,
pad or PC.
▪ It contains a wireless programmable room thermostat LTC10, a wireless receiver
LTR10, and a WI-FI gateway LTG10 accessing your thermostat to Internet. Three units
are linked by Radio Frequency.
▪ This thermostat is a programmable room thermostat 5+2 Days / 7 Days / 1 day product.
5+2 days allows you to set a program for weekdays and a program for the weekend.
7 days allows you to set a same program for every day of the week. 1 day functionality
allows you to set a different program for every day of the week. Each program type allows
you to set 7 time and temperature events.
Controls and Display Layout
Days
Temperature
Program setting time
ECO
+ or – buttons for setting adjustment
Conrm
Return
Auto, Manual, Holiday mode
RF
Time
Humidity
LGateway control button
Copy Clock set
Child lock
Program set
Frost protection
Heating
Low battery warning
Open window

2
2.1.1 Install receiver
Follow the installation diagrams to install and connect the receiver LTR10 correctly.
Note: 1 The installation and wiring should be operated by trained personnel.
Note: 2 The Receiver should be mounted in a suitable location that is both accessible for
the connection of mains and control wiring, and allows good reception of the RF
signal. The Receiver needs a 100~240 V AC mains supply to operate, and this
should be fused appropriately (5 A max.).
Note: 3 The Receiver should be mounted in a location where it will not come into contact
with water, moisture or condensation.
2. System Installation
2.1 Install and wiring receiver
Loosen the screw on the
receiver’s bottom. (No need
to screw out completely)
Fasten the terminal base
on wall with 4 screws
Loosen the screws on terminals,
wiring the terminal correctly, then
fasten the screws
Open the upper cover

32. System Installation
2.1.2 Wiring receiver
Note: 1 Install in accordance with local wiring regulations.
Note: 2 The wiring should be operated by trained personnel.
Note: 3 Observe ambient temperature and current limits (see product data sheet).
Note: 4 These diagrams must be read in conjunction with any boiler or cylinder manufac-
tures instructions.
Note: 5 Leto Smart accepts no liability for any loss or damage arising from any errors
or omissions that may be inadvertently contained within these diagrams. They
are proposal diagrams only, not certified wiring diagrams.
Close the upper cover
Press the area as below picture mentioned,
fasten the screw, after make sure no gap
between upper and lower covers, as well as
all the terminals will be connected

4
LTR 10
LTR 10
2. System Installation
Volt free contacts
Burner (direct control)
Combi boiler

5
LTR 10
LTR 10
LTR 10
2. System Installation
Electric heater
Thermal actuator
Zone valve

6
2.2.2 Install Thermostat
This thermostat could be desk-stand if open the back support, you just need to place it on
any at surface allows to receive RF signal.
If you want to hang it on the wall, use the template provided.
Drill two holes in the wall and tighten the screws, ensuring two holes’ distance is 81.5 mm;
then, x the thermostat’s back cover by putting it over the screw head.
2. System Installation
2.2 Activate battery and install thermostat
2.2.1 Activate battery

72. System Installation
2.3 System Check
2.3.1 RF signal pairing
The room thermostat has already been pre-bound with receiver’s
OVERRIDE I in kit LS99111010 when delivered. You may directly move
to RF signal pairing between room thermostat and gateway, please refer
to 2.3.1.B.
A. RF signal pairing between room thermostat and receiver
Start receiver’s RF pairing mode by hold-pressing on its LEARN button for 3 seconds,
receiver is ready for RF signal pairing when its light ashing.
Press OVERRIDE Ior II (you must choose according to your real wiring work on
receiver) to pair with thermostat; when light of OVERRIDE Ior II is ashing, it means
OVERRIDE Ior II is ready to pair with thermostat next.
Thermostat sends pairing command with reciver:
(4-1) Long press to enter Menu Selection,when are ashing,
press to enter RF pairing interface.
Preparation: thermostat and receiver should be powered/wired correctly, make sure
the visible distance between thermostat and receiver is not more than 5 meters.

82. System Installation
Exit pairing mode by pressing LEARN button: thermostat’s HOME page can be
returned by keep pressing .
Once thermostat and receiver were paired successfully, and their RF communication
started normally, will show up on the top right corner of thermostat’s screen.
(4-2) When is ashing on the screen’s left side, press to send the
pairing command with receiver;
Pairing succeed if ashing on screen’s right side, pairing failed if E01 or E02
is ashing on screen’s right side. In this case, you need to send the pairing command with
receiver by pressing once again until pairing success.