Lennox OLT-1X User manual

Providing indoor climate comfort
OLT-1X
MUL30E-0303 09-2006
User manual
Control

1
TERMINAL-THERMOSTAT INSTALLATION
This unit is valid for operating as a cold onl or heat pump
application. The unit should be configured prior to making the
electrical connections, b setting the configuration switch as
follows:
Your new LENNOX Thermostat has been designed to provide accurate control and displa of room temperature. In
addition, it will also displa all relevant information pertaining to our s stem.
The clearl marked buttons and informative displa make it extremel eas to understand and simple to use.
Please take a few moments to read the brief instructions and familiarise ourself with the various functions in order to obtain
maximum benefit from this trul unique electronic control.
This electronic control is organised into two integrated s stems: a terminal, installed in the room, and a power board for managing
the actuators in the electrical panel. The terminal is connected to the power board using a four-lead cable, thus greatl simplif ing
installation, with shield cable (supplied with the unit).
TERMINAL INSTALLATION
For correct installation the following warnings must be heeded:
 Alwa s disconnect the power suppl before performing an operations on the board during assembl , maintenance or
replacement.
 The terminal should be fastened to the wall verticall , allowing for air to circulate through the instrument's vent-holes, in order
to detect the correct ambient temperature
 Avoid places where the measurement of the ambient temperature b the internal sensor ma be altered, such as outside walls,
near doors leading outside, in direct sunlight, etc.
The installation procedure is as following:
1º To detach the front panel of the terminal from the rear shell,
insert a flat-head screwdriver in the slot in the centre of the bottom
of the box and release the locking flap.
2º Raise the front panel using a hinge movement, using the
upper edge of the instrument as the pivot and raising the lower
edge.
3º To fasten the rear part of the box to the wall, use the mounting
holes on the shell.
Cable supplied with
the unit Maximum
length allowed is
15m
Power board
UNIT
4º Connect the cables to the
terminals on the electrical box, as
indicated in electrical diagram.
5º Finall , close the instrument, moving the front panel onto the rear shell with a hinge movement, in the opposite wa as used
for opening. First the long side of the front panel near the displa is snapped onto the rear shell, then the opposite side, being
careful that the terminal pins slide into their corresponding female terminals.
Sub-base Terminal-Thermostat
INSTALLATION GUIDE FOR CONTROL CABLE (TO AVOID INTERFERENCES):
 Use the screened 15 m cable supplied with terminal (3 wires + screen).
 Wire the cable separated from electrical power wiring b a ph sical distance of 500 mm.
 Wire the cable separated from halogen lamps/fluorescent tube lighting... b a ph sical distance of 500 mm.
 Wire the cable separated from radio frequenc sources such as radio transmitter... at least 500 mm.
NEVER WIND THE REMAINING CABLE AROUND, CUT THE CABLE BY THE TERMINAL END.
CONTENTS
 TERMINAL-THERMOSTAT INSTALLATION AND UNIT CONFIGURATION
 USER INTERFACE DESCRIPTION
 SELECTING UNIT OPERATING MODE AND SET-POINT
 PROGRAMMING ADJUSTMENT
 ALARM CODES
 UNIT PROTECTION DEVICES
PAGE
1
2
3-4
5
6
6
ON / OFF
ON / OFF
12
ON / OFF
KEY LOCK
AUTO
AUTODRY COOLHEAT FAN
COOL
TEMP.
HEAT
TEMP.
ROOM
TEMP.
TIMER ACTIVE SET TIMER SET CLOCK
MON TUE WED THU FRI SAT SUN
SLEEP
SWING
SLEEP MODE
SWING ON TIMER OFF TIMER
HOLD DAY HOUR MINUTE
CLOCK
SET TEMP
FAN
IMPORTANT Prior o making the electrical connections, set the switch or heat pump unit or or cooling
only unit.
NOT USED FOR CASSETTE UNITS. (See documentation or the unit)
HEAT PUMP
J_MODE
COOLING ONLY
(factor setting)
P.C.B.
J_MODE
J_MODE

2
USER INTERFACE DESCRIPTION
Displa indicates when ke
lock function is activated.
Current Time
Display
Displa the current
time
Alarm
indicator
Displa the sleep / energ
saving status.
Displa the air swing status,
(if incorporated on the unit)
Hold button
To resume the timer
setting after the timer
has been placed on
hold
Minute button
Hour button
When the control is in set clock
or set timer mode, pressing the
HOUR button will change the set
hour.
Day button
When the control is in set
clock or set timer mode,
pressing the DAY button will
change the set da .
Clock
To adjust the actual
real time
Displa the start and
stop time
programmed.
When the control is in set clock
or set timer mode, pressing the
MINUTE button will change the
set minute.
ON TIMER/OFF TIMER button
Used to adjust an ON/OFF TIMER to the
unit
Indicates that a
programming is
setting Indicates we are setting the clock
Temperature button
Pressing them the displa
shows the set point or the
room temperature, and with
them we can select the
desired temperature (set-
point)
°C or °F Display
Displa the temperature
in °C or °F.
Key Lock Display
Start / Stop
Time Display
Set Temperature
or Room
Temperature Display
Displa the set or
room temperature.
On/O Status Lamp Display
Operation Mode
Display
Displa s the current
mode of operation.
Displa s the fan speed
setting.
(Auto/High/Medium/Low)
Swing Display
Sleep Display
Fan Speed Display
Mode button
Press MODE button to
select operation mode from Cool, Heat,
Auto, Dr and Fan.
Swing button
Press SWING button to
activate the air sweep
function.
Sleep button
Press SLEEP button to
activate the sleep or energ
saving mode.
Fan button
Press FAN button to
select Auto, High,
Medium or Low fan speed.
FAN
ON TIMER
DAY
CLOCK
HOLD
SWING
SLEEP
MINUTEHOUR
OFF TIMER
SET TEMP
MODE
ON / OFF
SET TIMERTIMER ACTIVE
ROOM
TEMP.
SET CLOCK
AUTO
MON TUE WED THU FRI SAT SUN
KEY LOCK
SLEEP
SWING
COOLAUTODRY FANHEAT

3
SELECTING UNIT OPERATING MODE AND SET-POINT TEMPERATURE
AUTO
On / O
A ) HOW TO TURN ON/OFF THE UNIT
The button allow the increase of the current set-point b 1ºC/1ºF
The button allow the decrease of the current set-point b 1ºC/1ºF
The temperature range is from 16ºC/60ºF to 30ºC/85ºF
Starting operation:
When the unit is off, press the ON/OFF button. The operation
LED lights and the unit will be turned on.
Stopping operation:
When the unit is on, press the ON/OFF button. The operation
LED is extinguished and controls are turned off.
Operating Lamp
B) SELECTING THE UNIT'S OPERATING MODE
C) SELECTING DESIRED ROOM TEMPERATURE (SET-POINT)
If unit is working, the or buttons allow to select the desired room temperature (set-point)
When the button or are pressed one, the display will show the selected desired
temperature (set-point) during 5 seconds, a ter that the display will show the room temperature
SET TEMP
D) SELECTING THE FAN OPERATING MODE
Pressing button scrolls through the
following modes, and we can selected
the one desired
FAN
To change from ºC to ºF or vice versa, press the buttons at the same time
SET TEMP
The operating mode is alwa s indicated on the displa
Pressing the mode button repeatedl ou can change the unit operating mode, and choose the one desired:
COOL: The unit is working on cooling mode, when compressor is working s mbol will appear on the displa
HEAT: The unit is working on heating mode, when compressor or electrical heater is working s mbol will appear
on the displa
AUTO: The s stem automaticall switches from cooling to heating mode, depending on the position of the ambient
temperature in respect to the set-point, the s mbol will appear on the displa and also the s mbols or
depends on the operating mode selected
DRY: The s mbol will appear on the displa
FAN: Fan control onl ; when fan is working the s mbol will appear
ON / OFF
SET CLOCK
MON TUE WED THU FRI SAT
SUN
KEY
LOCK
TIMER ACTIVE SET TIMER
AUTO
HEAT
HEAT
TEMP.
ROOM
TEMP.
AUTO
COOL
TEMP.
DRY COOL
SLEEP
SWING
FAN
NOTE: If we have selected FAN as the unit operating mode, the SET POINT can not be modified
SET TEMP
To be able to select a fan operating mode, cool, heat or auto unit's operating mode must be selected.
If DRY mode have been selected the fan operating mode can not be selected.
If Fan mode have been selected the automatic fan operating mode can not be selected
AUTOMATIC: The fan selects the most appropriated fan speed
HIGH
LOW
MEDIUM
NOTE: Even when a low speed have been selected on heating mode, the unit self protective changing automaticall
to a higher fan speed, when the unit is working at high temperatures.
Cool DrHeat FanAuto
SET TEMP

4
SETTING THE TIMER
Mo (Monda )
Tu (Tuesda )
We (Wednesda )
Th (Thursda )
Fr (Frida )
Sa (Saturda )
Su (Sunda )
Our electronic climate control with timer operation is a programmable terminal.
With this terminal ou can program the unit to stop and start on each of the 7 da s of the week.
The ON TIMER and OFF TIMER functions ma be combined.
To set the timer, follow the instructions given below:
With the button, select the
da of the week that ou wish
to program. An previous
settings will be displa ed.
DAY
Push the button to finish the
programming for that da and to
program a different da .
DAY
Push or wait 15 seconds
for the programming to be
accepted, after which the
s mbol will remain visible and
the clock will show the real time.
ON TIMER
TIMER ACTIVE
Push the button.
Push the button and select the da of the week that ou wish to delete from the settings.
Push the button as man times as necessar until - : - - appears, showing that the setting for that da has
been deleted.
HOUR
DAY
ON TIMER
NOTE:
If the s mbol does not remain visible on the screen, the control has not stored the settings.
TIMER ACTIVE
Press the button.
The and s mbols
will flash on the screen.
ON TIMER
SET TIMER
With the button, select the
da of the week that ou wish
to program. An previous
settings will be displa ed.
DAY
Push the button to finish the
programming for that da and to
program a different da .
DAY
Push or wait 15 seconds
for the programming to be
accepted, after which the
s mbol will remain visible and
the clock will show the real time.
TIMER ACTIVE
OFF TIMER
Press the button.
The and s mbols
will flash on the screen.
SET TIMER
OFF TIMER
HOW TO DEACTIVATE THE ON TIMER / OFF TIMER FUNCTION
HOLD
TIMER ACTIVE
To deactivate the settings and store them for future use:
Press the button for 3 seconds, until the indication disappears.
To activate them once again, press the button for 3 seconds once again, until the indication appears
HOLD
TIMER ACTIVE
With the ON TIMER function, the unit will automaticall
start at the selected time, in the same operating mode
as when it was switched off.
HOW TO DELETE THE ON TIMER / OFF TIMER FUNCTION
1
3
4
2
1
3
4
2
PROGRAMMING THE UNIT TO START
(ON TIMER) PROGRAMMING THE UNIT TO STOP
(OFF TIMER)
HOUR MINUTE
TIMER ACTIVE
With the and buttons,
enter the exact time at which ou
wish the unit to start. The
s mbol will flash.
HOUR MINUTE
TIMER ACTIVE
With the and buttons,
enter the exact time at which ou
wish the unit to stop. The
s mbol will flash.

5
OPERATING
This feature protects the controls from being tampered with b children or unauthorized persons.
To activate, press the button three times consecutivel , s mbol will appear on the LCD displa .
During this time, onl button can be used.
To cancel this feature, press the button again three times consecutivel . and the indication will
disappear on the displa
The unit is supplied with a lithium batter acting as a power back up in the case of a power failure. The real time
clock and other settings are maintained during the power failure and reset when power is restored.
Set Point - 0.5ºC
HOURS
Set Point
Set Point - 1ºC
Set Point - 2ºC
ºC
Set Point+0.5ºC
HOURS
Set Point
Set Point+1ºC
Set Point+2ºC
ºC
MON TUE WED THU FRI SAT SUN
Press button once to set the clock mode, the indication will appear on the displa blinking
Press button repeatedl , scrolls through the following da s of the week, and we can selected the one desired
Press button to set the hour
Press button to set the minutes
Press button to accept
CLOCK
CLOCK
DAY
HOUR
MINUTE
SET CLOCK
KEY LOCK
KEY LOCK
HOUR ADJUSTMENT
KEY LOCK
0.5 1 2
0.5 1 2
MINUTE
MINUTE
ON / OFF
COOLING MODE
SLEEP FUNCTION ON
Increase the set point temperature as the above drawing
shows
HEATING MODE
SLEEP
SLEEP FUNCTION ON
Decrease the set point temperature as the above drawing
shows
SLEEP
SLEEP
Pressing the button , we activate this function. It is registered on the displa with the s mbol
SWING
SWING
FUNCTION SWING
Press button , the function swing gets activated, the s mbol will appear on the LCD displa

6
DESCRIPTIONVIS. EFFECTS
Probe temperature higher than 37ºC.
Probe temperature lower than 8ºC. The unit is working, and the warning disappears when temperature is
between 8ºC and 37ºC.
Unit will
stop Check connections between unit and thermostat.
Compressor
will stop Check connections of indoor coil temperature probe.
Compressor
will stop
Compressor
will stop.
Condensate
pump working.
Unit will stop
Unit will stop
The unit self-protect through safet devices, when an of these safet devices detect an
anomal , shown in the displa in order to advise the installer.
ALARM CODES
The activation of an alarm brings about:
- The displa of the alarm code on the displa .
- The blocking of some or all the outputs, depending on the t pe of alarm.
VIS (Visualization): Indicates the t pe of alarm shown on the displa .
RE (Reset): T pe of reset:
AUT: AUTOMATIC RESET: Some alarms are automaticall reset, when the cause is no longer present, the disappear
from the displa .
MAN: MANUAL RESET: Press "ON/OFF" button.
DESCRIPTION
Compressor overload.
During heating c cle the indoor
coil temperature has been too
high.
VIS. RE
Ambient temperature regulation
probe error.
Indoor coil temperature
probe error.
AUT
AUT
Overflow of water condensing.
The float switch has detected
water overflow.
EFFECTS ACTION
AUT/
MAN
AUT
These protections are automatic reset for the first time. To
reset for second time press button "ON/OFF" until alarm
disappears.
If the alarm shows up again, check:
Connections of indoor coil temperature probe.
Indoor unit works properl .
Clean air filters.
These protections are automatic reset, the alarm resets
automaticall when there is no more water.
If the alarm shows again, check the water drain, and the
connections of float switch.
AUT
Short circuited temperature
probe. AUT
Check probe connection.
Temperature probe open. Check probe connection.
UNIT PROTECTION DEVICES
AGAINST FREQUENT COMPRESSOR CYCLING
When COOL/HEAT/AUTOMATIC is selected, the start up of the unit will be dela ed for 3 minutes, to protect the
unit against frequent compressor c cling.
AIR PREHEATING
On heat mode, the indoor unit fan will not start or will start at low speed, to prevent from air cool feeling, until the
indoor unit temperature reaches the set temperature then the unit will operate to the selected temperature.
DEFROST CYCLE
When the unit is operating on heating mode, the unit will do defrost to eliminate the ice that will produce the
outdoor unit; on this c cle, the indoor unit fan switches off.
AUTO RESTART
If power failure occurs during operation, the unit will start in the same operation mode as before after power
recover .
FREEZE-UP PROTECTION
If the unit is operating on cooling onl mode, and the indoor unit coil temperature is below a set value, the unit
stops.
DETECTING BROKEN SENSOR
If the control s stem detects a sensor reading out of permissible deviation, the unit stops.
WARNINGS

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MUL30E-0303 09-2006
BELGIUM, LUXEMBOURG
CZECH REPUBLIC
FRANCE
GERMANY
NETHERLANDS
POLAND
PORTUGAL
RUSSIA
SLOVAKIA
SPAIN
UKRAINE
UNITED KINGDOM AND IRELAND
OTHER COUNTRIES
Due to Lennox’s ongoing commitment to quality,
the Specifications, Ratings and Dimensions are
subject to change without notice and without
incurring liability.
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage or personal injury.
Installation and service must be performed by a
qualified installer and servicing agency.