Flextherm LS120P User manual

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 FAULT, 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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u
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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.
120 VAC
VAC
120
60 HZ
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 volts)

Temporary or permanent temperature bypass
This operation allows you to temporarily modify the floor temperature while you
are in the Automatic mode. Simply press on or buttons to select the desired
temperature, or the or button to select the Comfort or Econo settings you
have programmed.This temperature will be maintained until the beginning of the
next programmed schedule.
You can also switch to the Vacation setting for a prolonged absence by pressing
on and at the same time.The display will show icon. In that case,
the temperature bypass is permanent. To return to the normal operating mode,
press on Mode button.
If you wish to immediately return to the programmed settings, press on Mode
button twice.
1- Press on PGM button to access the programming mode.
2- Press on Day button 3 seconds to select every day of the week.
3- Press on Hour and Min buttons to enter 6:15 AM Prog. 1, ( ).
4- Press on PGM button to select Prog. 2 ( ) and Hour and Min
buttons to enter 8:15 AM.
5- Repeat step 4 to enter Prog. 3 (5:00 PM) and Prog. 4 (10:00 PM).
NOTE: When making modifications, make sure you are in the right
program.
To modify the Saturday and Sunday schedules:
6- Press on Day button until SA or SU is displayed.
7- Press on PGM button to select Prog. 1 ( ) and Hour and Min
buttons to enter 7:30 AM.
8- Press on PGM button to select Prog. 2 ( ) and then Clear button
to erase it.
9- Press on PGM button to select Prog. 3 ( ) and then Clear button to
erase it.
10- Press on PGM button to select Prog. 4 ( ) and then Hour and Min
buttons to enter 11:00 PM.
11- Press on Mode button to exit this function.
a) To program your schedule
1- Press on PGM button to access the programming mode.
2- Press on Day button to select the day to be programmed. You can select
all days of the week by pressing on Day button for 3 seconds.
3- Press on PGM button to select program 1, 2, 3 or 4.
4- Press on Hour and Min buttons to program the time.
5- When you have completed your programming, press on Mode button
to exit this function.
b) To erase a program :
Select the program using PGM and Day buttons, and press on Clear
button. The time field displays --:-- when the program is inactive.
c) Example 1 : Comfort period from 7:00 AM to 10:30 PM
Economy period from 10:30 PM to 7:00 AM
Identical schedule for all days of the week.
1- Press on PGM button to access the programming mode.
2- Press on Day button 3 seconds to select every day of the week.
3- Press on Hour button to enter 7:00 AM, Prog. 1 ( ).
4- Press on PGM button again to select Prog. 2 ( ), and press on
Hour and Min buttons to enter 10:30 PM.
5- Press on Mode button to exit this function.
Programming the time and day
1-Set the time using the Hour and Min buttons.
2-Set the day using the Day button.
Programming the Comfort, Economy and Vacation settings
The Comfort , Economy and Vacation settings respectively represent
the temperatures that you wish to have during the day , at night or while
you are away at work , or while you are away for an extended period .
Schedule programming
The LS120P allows 4 setting changes for each day of the week. There are no
pre-set programs.The programs are tailored to perfectly adapt to your life style.
The principle is very simple. For each day, enter the time at which you wake up
(P1), the time you leave for work (P2), the time you arrive back home (P3) and
the time you go to bed (P4).
PROGRAMMING
Mode
NOTE : For temperature increases (Prog. 1 and 3), allow at least
15 minutes per °C. If you have lowered the temperature by
3 °C during the night and you wake up at 7 AM, change the
setting at 6:15 AM.
For savings to be obtained, you must lower the temperature for a period of 2 to 3
times the delay required to bring the temperature back to your comfort level.
Example : If your system takes one hour to go from your saving temperature
level to your comfort temperature Ievel, it is useless to lower the temperature for
a period less than 3 hours.
Program
1
2
3
4
Time
Wake-up time
Departure time
Return time
Bed time
d) Example 2 : Comfort period: Monday to Friday from 6:15 AM to
8:15 AM and from 5:00 PM to 10:00 PM.
NOTE: It is faster to program the same schedule for every day and then
modify the exception days.
CHARACTERISTICS
• Model: LS120P (120 VAC)
• Supply: 120 VAC, 50/60 Hz
• Load: 16 A maximum (Resistive only)
• Power: 1920 watts (NI) @ 120 VAC
• Ground fault circuit interrupter (GFCI): Class A (5 mA TRIP LEVEL)
• Approvals: CSA / C, US
• Display range: 0 to 60 °C (32 to 140 °F)
• Setting range: 5 to 40 °C (40 to 104 °F)
• Comfort default setting: 28 °C (82 °F)
• Econo default setting: 18 °C (64 °F)
• Storage: -20 to 50 °C (-4 to 120 °F)
WARRANTY
ONE (1) YEAR LIMITED WARRANTY
This product is warranted against manufacturing defects for a period of one year,
from the date of the original purchase from authorized dealers. During this peri-
od, Flextherm inc. will repair or replace the product with a new or of equivalent
quality at Flextherm’s option, without charge, any product proven defective in nor-
mal use.
Warranty does not cover transportation costs, or does it cover a product subject-
ed to misuse or accidental damage. This warranty does not cover the cost of
installation, removal or reinstallation.
This limited warranty replaces any and all other warranties, obligations or liabili-
ties expressed or implied by the company. In no event shall Flextherm inc. be
liable for consequential or incidental damages resulting from installation of this
product.
All defective merchandise must be returned to your retailer or installer.
If you have any questions concerning the installation or programming of this
product, please call your retailer, installer or Flextherm.
FLEXTHERM INC.
2400, de la Province street, Longueuil (Quebec), J4G 1G1 Canada
Tel.:[phone], Fax: [phone]
1-800-353-9843
Web Site: www.flextherm.com
E-mail: [e-mail]
16/12/02 920-111-025-00-1-B LS120P0212A - Printed in China 2/2
To program your settings
a) To program the Comfort temperature, select the desired degree using the
buttons and press the button until the icon is displayed
(app. 3 seconds).
b) To program the Economy temperature, select the desired degree using the
buttons and press the button until the icon is displayed
(app. 3 seconds).
c) To program the Vacation temperature, select the desired degree using the
buttons and press on the and buttons simultaneously
until the icon is displayed (app. 3 seconds).
d) Press the Mode button to exit this function and return to the normal
operating mode.
Schedule/Day
PROG. 1
PROG. 2
PROG. 3
PROG. 4
MON.
6:15 AM
8:15 AM
5 PM
10 PM
TUES.
6:15 AM
8:15 AM
5 PM
10 PM
WED.
6:15 AM
8:15 AM
5 PM
10 PM
THU.
6:15 AM
8:15 AM
5 PM
10 PM
FRI.
6:15 AM
8:15 AM
5 PM
10 PM
SAT.
7:30 AM
---
---
11 PM
SUN.
7:30 AM
---
---
11 PM
Memory back-up
In the event of a power failure, an internal circuit will maintain the programming
and the time. But only the time could have to be set if power failure is more than
2 hours.
Early Start function
The thermostat has a built-in function enabling it to calculate the optimum time to
start the heating system to achieve the desired temperature setting at the pro-
grammed time. This function could start the heating system as early as 6 hours
prior ti the programmed time. To enable this function, set the switch E.S. to “ON”
at the back of the thermostat.