SUMMARY
OPTIONS SELECTION
At the back of the thermostat, there are three selection switches to set at
your preferences.
Temperature in °C or °F, time in 12 or 24 hours and Early Start function.
TO SET TIME AND DAY
Press on DAY, HOUR and MIN buttons to adjust time and day.
TO RECORD THE (COMFORT) SETPOINT TEMPERATURE
Select chosen setpoint temperature by using or button. Press on
button (2 to 3 seconds) until icon appears on display.
TO RECORD THE (ECONOMY) SETPOINT TEMPERATURE
Select chosen setpoint temperature by using or button.
Press on button (2 to 3 seconds) until icon appears on display .
CHECKING GROUND FAULT CIRCUIT INTERRUPTER (GFCI)
Adjust the setpoint temperature until heating indicator ( ) appears on
display. Press on TEST button. The test is conclusive if the warning light
(GFI) on thermostat is ON and power to the load is cut-off ( remain
on display though). If these events do not occur, check the installation.
Press on RESET button to reset the GFCI.
OPERATING MODES
To select an operating mode, use MODE button.
AUTO: Runs the program. or shows temperature setting
and can override temporarily your programming up to the
next program
MAN: Maintains the selected temperature. or changes
the temperature setting.
Power-up
When power is applied for the first time, the
display must show the time 00:00, the floor
temperature and the manual mode icon ( ).
Other information might show up on the display if
installation is defective or does not comply with
the instructions. The warning light (GFI) must be
off.
The message L0 or HI will appear on the display
if the temperature sensor is defective or the
temperature is below 0 °C (32 °F) or higher than
60 °C (140 °F). Also, the heating indicator will be
present on display and the relay will be closed
(current going in the load).
Checking ground fault circuit interrupter (GFCI)
Adjust the setpoint temperature until
heating indicator ( ) appears on
display. Press on TEST button. The test is
conclusive if the warning light (GFI) on the
thermostat is ON and power to the load is
cut-off. If these events do not occur, check
the installation. Press on RESET
button to
reset the GFCI.
If the GFCI test fails:
Check the load wires. The thermostat
must be in heating mode to carry out the
test (heating indicator ON).
The GFCI test should be carried out
monthly. If the test fails, cut off the electric
power to the heating system and call
customer service or return the thermostat
to your supplier for verification. If the
warning light comes on during normal
operation, cut off power to the heating
system and have an electrician verify the
installation.
LS120P
1920 W (NI) @120 VAC
LS12 0P
1920 W (NI) @ 120 VAC
INSTALLATION
This thermostat is designed to control floor electric heating systems.
The
resistive load must not exceed 1920 watts (NI) @ 120 VAC (16 A). The
thermostat is equipped with a ground fault circuit interrupter (GFCI) and therefore
the isolation of the line and load are required for operation. THE POLARITY OF
LINE CONNECTION (LINE AND NEUTRAL) MUST BE RESPECTED. DURING
A GROUND F
AULT, ONLY THE CURRENT IN THE BLACK WIRE (LINE) OF THE
LOAD WILL BE CUT-OFF. CONNECT THERMOSTAT AS SHOWN ON
DIAGRAM.
This thermostat is an electrical product and must be installed in conformity with
the national and/or local Electrical Code. The installation must be performed by
qualified personnel where required by law.
This thermostat is designed to be used with a heating system with circuit breaker
.
PARTS INCLUDED
- One (1) LS120P (120 VAC) thermostat
- Two (2) 6-32 screws
- Four (4) solderless connectors (for copper wire)
- One (1) Temperature sensor with a 4.5 meter (15 foot) extension
TURN OFF POWER OF THE HEATING SYSTEM AT THE MAIN POWER
PANEL TO AVOID ELECTRICAL SHOCK. Keep air vents of the thermostat clean
and free from obstructions.
1) Connecting wires and mounting thermostat
Connect the rear thermostat wires to the power supply and to the load using sol-
derless connectors for copper wires. See schematic diagram.
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LS120P
1920 W (NI) @ 120 VAC
Push the excess wire back into the electrical box to prevent interference with
the thermostat. Secure the thermostat using two (2) 6-32 screws . Once the
thermostat is properly installed, return power to heating system.
NOTE: All cables and connections must conform to the local electrical code.
WARNING : Special CO/ALR solderless connectors must be used when
connecting with aluminum conductors.
2) Connecting temperature sensor wire
Connect the temperature sensor wire to the
two lower screws of the terminal block at
the back of the thermostat (no polarity need
to be respected). The wire must pass out-
side the electrical box and follow the wall
down to the floor. Install the sensor wire
between two runs of cable, at a distance of
30 to 60 cm (1 to 2 feet) within the heating
zone in a neutral location, away from any
source of heat or cold. Do not cross the
probe wire over the heating cable. Secure
the sensor to the floor with hot glue. It will
be necessary to recess the sensor in the
floor so it is at the same level as the heating
cable.
920-111-025-00-1-B LS120P0212A - Printed in China 1/2
OPERATING MODES
The LS120P has two (2) operating modes.
MANUAL ( )
This mode allows you to maintain a constant temperature of the floor.
1- To activate this mode, press on Mode button to display the icon.
2- Set the desired temperature using the buttons or select the
pre-programmed or or settings.
(To select the setting, press on and simultaneously.)
AUTOMATIC ( )
This mode executes your own programming.
To activate this mode, press on Mode button to display the icon.
The or icon indicates which temperature setting is used. Also, the icon
of the program number will be shown.
LS120P
Programmable Electronic
Thermostat (120 volt
s)
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