Lennox A111C, A112H User Manual
CONTROLS
A111C/A112H
English/03-2004
USER MANUAL
1
TABLE OF CONTENTS
PAGE
2
3
4
5
6
7-8-9
10-11-12
13
14
15
16
17
CONTENTS
GENERAL DESCRIPTION
TERMINAL-THERMOSTAT INSTALLATION
USER INTERFACE DESCRIPTION
SELECTING UNIT OPERATING MODE AND SET-POINT
SELECTING THE TEMPERATURE SET-POINT CATEGORY
CLOCK AND TIME BANDS (AS AN OPTION)
PARAMETERS, STATUS AND READINGS (PROGRAMMING)
DEFROST MANAGEMENT
ALARM CODES
REMOTE SENSORS (AS AN OPTION)
THERMOSTATIC FREECOOLING (OPTION).
STANDARD GUIDELINES TO LENNOX EQUIPMENT
2
GENERAL DESCRIPTION
IDENTIFICATION CODE FOR THE TERMINAL-THERMOSTAT
A111
Type of control
No. of speeds of the indoor fan
No. of cooling stages
No. of heating stages
Application
C: Cooling only
H: Heat pump
Configuration Version
BASIC TERMINAL NAME ACCESSORIES
P: Programmable
(Programming schedule
SP: Freecooling)
(INTERNAL FACTORY CODES)
IMPORTANT
This electronic control is organised into two integrated systems: 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 two-lead
cable, thus greatly simplifying installation.
Terminal-Thermostat
Installed in the room (*)
Electrical panel in the unit
Power board
AIR CONDITIONING UNIT
Two-lead shielded cable
(*)If a remote sensor is requested as an option, the terminal-thermostat can be installed in a different place from
the room to be conditioned
Since this type of control panel is factory-configured for each application, an identification code located on the
control panel of the terminal itself has been given to each panel.
Any query or request for a replacement of the control panel must be accompanied by this identification
code.
Your new LENNOX Thermostat has been designed to provide accurate control and display of room
temperature. In addition, it will also display all relevant information pertaining to your system.
The clearly marked buttons and informative display make it extremely easy to understand and simple to use.
Please take a few moments to read the brief instructions and familiarise yourself with the various functions in order
to obtain maximum benefit from this truly unique electronic control.
3
TERMINAL-THERMOSTAT INSTALLATION
When making the connection to the power board, special
attention must be paid to the polarity; the T+ terminal must
be connected to the T+ terminal on the power board; similarly
for the T- terminal (If the cables are connected in the opposite
order the instrument will not be damaged).
Terminal installation
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, place the hole in the centre of the box over the cables for the control
of the instrument which come out of the wall. The placement of the mounting holes has been designed to allow
the instrument to be fixed onto a box conforming to standards CEI.431 - IEC 670. (100x600). If this is not available,
use the mounting holes on the shell as a guide for drilling holes into the wall and then use the screw and plug
kit supplied.
4ºConnect the cables to the terminals on the rear shell of the box,
as indicated in, and in electrical diagram.
Sub-base
Sub-base
Maximum length allowed is 150m
T+
T-
To PCB in electrical panel
of air conditioning unit
For correct installation the following warnings must be heeded:
Always disconnect the power supply before performing any operations on the board during assembly, maintenance
or replacement.
The terminal should be fastened to the wall vertically, 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 by the internal sensor may be altered, such
as outside walls, near doors leading outside, in direct sunlight, etc.
The cables for connection to the power board must be kept separate from other cables,
using an individual cable channel; and use shielded cables, with a cross-section of 1mm.
2
5º Finally, close the instrument, moving the front panel onto the rear shell with a hinge movement, in the opposite
way as used for opening. First the long side of the front panel near the display is snapped onto the rear shell,
then the opposite side, being careful that the terminal pins slide into their corresponding female terminals.
Terminal-Thermostat
Installed in the room
Electrical panel in the unit
Power board
AIR CONDITIONING UNIT
Two-lead shielded cable
with a cross-section of 1mm.
2
4
USER INTERFACE DESCRIPTION
FUNCTIONS OF THE BUTTONS
Side buttons
aut
set
These are placed on the front panel of the instrument. These allow the immediate setting of the desired temperature
(set-point), and with them the parameters could be modified.
While unit is ON:
- If both button are pressed together for one second, the display will show up the set point in place of the room
temperature.
- If both button are pressed together for more than five seconds, the display will show up the software version.
SIDE BUTTONS
These buttons allow access to all the other functions of the control.
Indicates change value
of parameters
THE CONTROL IS ACTIVE 5 SECONDS AFTER THE UNIT
POWER IS SWITCHED ON
Time-band indication
Set point display
Mode: "absence","comfort", "night"
Temperature probe
measurement
Indicates set point display
Heating ON
Unit OFF
Indicates operating mode / clock / User parameters
Fan operation indicator
Cooling ON
Thermometer associated to
temperature measurement
Fan operating mode
Display
1
MTWTFrSS
Day of week
clock
set
mode
fan
hold
resume
aut
set
1
MTWTFrSS
and buttons
AND BUTTONS
5
SELECTING UNIT OPERATING MODE AND SET-POINT TEMPERATURE
clock
set
mode
fan
hold
resume
To be able to select a fan operating mode, cool, heat or auto unit's operating mode must be selected
Pressing FAN side button scrolls through the following modes: FAN CONSTANTLY ON, or AUTO
FAN CONSTANTLY ON
Fan is continuous ON, the symbol will appear.
AUTO:
Fan on and off together with the compressor, the symbol will appear.
1
aut
The operating mode selected is active 5 seconds from setting,
when the respective sign stops flashing.
A ) SELECTING THE UNIT'S OPERATING MODE
C ) SELECTING THE FAN OPERATING MODE
B ) SELECTING DESIRED ROOM TEMPERATURE (SET-POINT)
The operating mode is always indicated on the display.
Pressing the mode button repeatedly you can change the unit operating mode:
COOL: The unit is working on cooling mode, when compressor is working, the symbol will appear
on the display.
HEAT: The unit is working on heating mode, when compressor or electrical heater are working, the
symbol will appear on the display.
AUTO:The system automatically switches from cooling to heating mode, depending on the position of
the ambient temperature in respect to the set-point.
FAN: The unit will work on fan mode; When fan is working the symbol will appear.
OFF:The thermostat switches the unit off, the symbol appears on the display .
aut
set
Fan operating mode
1
set
If unit is working, the or buttons allow to select the desired room temperature (set-point).
The button allows the increase of the current set-point by 0.5ºC.
The button allows the decrease of the current set-point by 0.5ºC.
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