USER MANUAL
Contents
1. Sa Saturday clock to accept Su Sunday The display shows Other time bands for the Ed E same day are scrolled by T pressing clock Vr LUNT Stops the programming for that day and let you start programming for another day NI Mo Tu We Th Fr Sa Su F Nov LUryY 5 Confirming the Use front buttons to scroll to another day which will flash in x days using the turn thus extending the same program to the selected days clock button Continue to program the remaining days The time interval identified by time current band is shown on the display using the clock symbol divided into 1 hour sections Thus the time band from 12 to 7 o clock is indicated as follows Pressing front buttons La s al aaa aal To exit programming mode and accept the modifications to the mode parameters press the i clock button M NI FEN If press the RESUME button the changed will be not saved LU 8 CLOCK AND TIME BANDS PROGRAMMING After all time bands have been programmed and unit it is working on any of them there are two ways to change the desired set point for the time band currently in use A Change the desired set point of the current time band during three hours The desired set point can be changed using the front buttons and will maintain the change for three hours Pre2. One of them for 4 C closes the gate in order to prevent freezing The other one for 10 C opens the gate to take advantage from outside air These thermostats only work when the freecooling is enabled If it does not work properly please check the jumper according to the electrical wiring diagram 16 POINTS TO KEEP IN MIND Standard Guidelines to Lennox Refac equipment All technical data contained in these operating instructions including the diagrams and technical description remains the property of Lennox Refac and may not be used except for the purpose of familiarising the user with the equipment reproduced photocopied transferred or transmitted to third parties without prior written authorisation from Lennox Refac The data published in the operating instructions is based on the latest information available We reserve the right to make modifications without notice We reserve the right to modify our products without notice without obligation to modify previously supplied goods These operating instructions contain useful and important information for the smooth operation and maintenance of your equipment The instructions also include guidelines on how to avoid accidents and serious damage before commissioning the equipment and during its operation and how to ensure smooth and fault free operation Read the operating instructions carefully before starting the equipment familiarise yourself with the equipment and hand
3. Thermometer associated to Indicates set point display temperature measurement Nm m Fan operating JHH Temperature probe I I J El lt lt Fan operating mode measurement e MTWTFrSS Heating ON Day of week we are D BAD 1 1 Cooling ON programming INL mu 2 2 Time band indication Unit OFF Set point category Indicates operating mode clock User parameters absence comfort night SELECTING UNIT OPERATING MODE AND SET POINT TEMPERATURE A SELECTING THE UNIT S OPERATING MODE The operating mode is always indicated on the display clock Pressing the mode button repeatedly the possible operating modes for the model of machine selected are scrolled through 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 fan symbol will appear on the display AUTO The system automatically switches from cooling to heating mode depending on the position of hold the ambient temperature in respect to the set point FAN The unit will work on fan mode when fan is working the symbol SS will appear OFF The thermostat does not perform the regulation the symbol 1 appear on the display resume The operating mode selected is active 5 seconds from setting when the respective sign stops flashing SELECTING DESIRED ROOM TEMPERATURE SET POINT
4. E sek N HOGG If unit is working the or W buttons allow to select the desired room temperature set point The button allows the increase of the current set point 0 5 C The button V allows the decrease of the current set point 0 5 C C SELECTING THE FAN OPERATING MODE 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 CS will appear AUTO Fan on and off together with the compressor the symbol SS will appear aut mre 235 Fan operating mode SELECTING THE TEMPERATURE SET POINT CATEGORY D SELECTING THE TEMPERATURE SET POINT CATEGORY After COOL HEAT or AUTO operating mode has been selected pressing set button select the set point category There are 3 possible set point categories available 1 Comfort set point indicated by the symbol e It is the reference room desired temperature set point used for the rest of the categories ram 2 Brief absence set point indicated by the symbol Typically used when the room is not occupied for a short period of time 3 Night time set point indicated by the symbol 2 js The room is occupied yet a lower level of comfort is required The default set point values for the various categories are CATEGORY SET COOL SET HEAT Desired
5. If you press the button in the auxiliary printed board the defrost cycling will be on for this circuit DEFROST CYCLE SEQUENCE During defrost cycle the inversion of the reverse cycle from heating mode to defrost function the outdoor fan will stop and the inner fan keeps going on START DEFROST CYCLE The defrost cycle begins when outdoor probe temperature reaches 3 C END DEFROST CYCLE The defrost cycle ends when outdoor probe temperature reaches 25 C DELAY BETWEEN TWO DEFROST REQUESTS The time between 2 defrost cycles will be calculated between the end of one and the beginning of the other and it will be between 14 and 35 minutes depending on external conditions The defrost cycle is separately done for both circuits it is not at the same time When one circuit is on the defrost cycle the other one remains waiting POWER BOARD OF THE SYSTEM AT THE ELECTRICAL BOX OF THE AIR CONDITIONING UNIT The board features a signaling green LED which flashes when unit is electrically supplied The control features a minimum run timer which ensures that once started in heating or cooling mode the compressor and other associated components remain running for a minimum of 5 minutes The unit will not respond to a change in mode for this period of time This prevents premature wear of components Please bear this in mind when carrying out maintenance to the unit 13 ALARM CODES The unit self protects through safety devices when any o
6. fax 7 095 926 56 50 email lennox dist moscowEco nu SLOVAKIA LENNOX SLOVENSKO s r o t l 4217 44871927 fax 4217 44886472 email lennoxslovensko lennoxsk LENNOX REFAC S A t l 34 915 40 18 10 fax 34915 42 84 04 email marketing lennoxrefac com a UKRAINE LENNOX DISTRIBUTION KIEV t l 3804446187 75 fax 380 44 461 87 75 email lennoxua i kiev ua UNITED KINGDOM LENNOX INDUSTRIES Lid IRELAND t l 44 1604 669100 fax 44 1604 669150 email ukmarketingQlennoxind com OTHER EUROPEAN COUNTRIES LENNOX DISTRIBUTION AFRICA t l 33 4 722320 14 MIDDLE EAST fax 334 7223 2028 email marketingQlennoxdist com www lennoxeurope com COD M U L27 E 0701 03 2004 Due to Lennox s ongoing commitment to quality Specifications Ratings and Dimensions 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
7. panel must be accompanied by this identification code IDENTIFICATION CODE FOR THE TERMINAL THERMOSTAT BASIC TERMINAL NAME ACCESSORIES 22 1 of control Configuration Version No of speeds of the indoor fan INTERNAL FACTORY CODES No of cooling stages Application P Programmable No of heating stages x 2 ony Programming schedule Heat pump SP Freecooling 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 familiarize yourself with the various functions in order to obtain maximum benefit from this truly unique electronic control TERMINAL THERMOSTAT INSTALLATION 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 Termina
8. LENNOX USER MANUAL Y LENNOX PROVIDING SOLUTIONS CONTROLS A122C A123H English 03 2004 TABLE OF CONTENTS CONTENTS PAGE GENERAL DESCRIPTION 2 TERMINAL THERMOSTAT INSTALLATION 3 e USER INTERFACE DESCRIPTION 4 SELECTING UNIT OPERATING MODE AND SET POINT 9 e SELECTING THE TEMPERATURE SET POINT CATEGORY 6 CLOCK AND TIME BANDS AS AN OPTION 7 8 9 PARAMETERS STATUS AND READINGS PROGRAMMING 10 11 12 e DEFROST MANAGEMENT 13 e POWER BOARD OF THE SYSTEM 13 ALARM CODES 14 REMOTE SENSORS AS AN OPTION 15 THERMOSTATIC FREECOOLING AS AN OPTION 16 STANDARD GUIDELINES TO LENNOX EQUIPMENT 17 GENERAL DESCRIPTION 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 AIR CONDITIONING UNIT Electrical panel in the unit Power board Terminal Thermostat Installed in the room If remote sensor is requested as an option the terminal thermostat can be installed in a different place from the room to be conditioned IMPORTANT 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
9. R1 R3 R4 R8 R9 parameters we set the temperatures for which compressor and electrical heater will turn on as figure shows Unit is working on heating mode Unit is working on cooling mode R8 4 C R9 1 R3 2C R3 2C R4 0 5 C R4 0 5 C The unit has automatic sequence change therefore the compressors turn on or turn off depending on ON OFF ON OFF OFF ON which one has been more time Electrical x compressor operating or stand by heater Compressor A E2 E1 c2 C1 C1 C2 19 5 C 20 5 C 22 5 C 23 5 C 25 5 C Desired temperature Set Point R1223 C MODIFICATION OF SET POINT VALUE To modify the set point value see page 5 on this manual 11 PROGRAMMING THE PARAMETERS VALUES COD DESCRIPTION Hour counter compressors It indicates the number of compressors operating hours When 19 900 working hours have been reached the parameter starts counting again Hour counter inner fan It indicates the number of inner fan operating hours When 19 900 working hours have been reached the parameter starts counting again Supply fan operating hours threshold Establishes the number of inner fan operating hours beyond which the maintenance intervention signal alarm thf is activated F4 0 disables this function alarm will not be visualized F4 values from 1 to 10 number of hours x 1000 of inner fan operating hours Parameters F3 F4 allow setting
10. a number of inner fan operating hours after which the display shows the alarm code thf which means air filter should be changed or cleaned Therefore parameter F4 should be change establishing the number of fan operating hours X1000 beyond which the maintenance signal thf is activate It establishes what is displayed on the field in the top right of the display H7 1 Shows the value of the current set point H7 2 Shows outdoor coil and outdoor temperature freecooling option ETNE CIE BERE IDD 8c Puer Set point temperature ama T Ambient BAJO or Outdoor temperature temperature Only for terminal with clock function as an option It establishes the hour display format H9 0 THE FORMAT IS 24 HOUR CLOCK H9 21 THE FORMAT IS 12 HOUR CLOCK Format 24 hours Format 12 hours 12 DEFROST MANAGEMENT The defrost process is activated during heating mode in the heat pump units when the outside temperature is very low and the coil of the external heat exchanger could be frozen To melt the ice defrost function will turn on and brings about the inversion of the reverse cycle valve from heating mode to defrost function For this control the defrost cycle is done trough auxiliary printed boards The defrost auxiliary printed boards have 2 leds one for the supply and other for the defrost When one circuit is on the defrost cycle the led of its auxiliary printed board will be on
11. e T terminal must be connected to the T terminal on the power board similarly for the T terminal in case the cables are connected in the opposite order the instrument will not be damaged To PCB in electrical panel of air conditioning unit 5 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 USER INTERFACE DESCRIPTION THE CONTROL IS ACTIVE 5 SECONDS FROM THE TIME UNIT IS ELECTRICALLY SUPPLIED FUNCTIONS OF THE BUTTONS FRONT BUTTONS 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 Pressing simultaneously the front buttons for one second the display will show up the set point where room temperature was showed before Pressing simultaneously the front buttons the display will show up the software version for five seconds SIDE BUTTONS These buttons allow access to all the other functions of the control Side buttons N clock Display Front buttons fan MTWTIFrSS rd A A KA BBE k resume Indicates change value of parameters Probe measurement or set point
12. f these safety devices detect an anomaly it is shown in the display in order to advise the installer The activation of an alarm brings about The display of the alarm code and the letters AL alternating with the display of the temperature The blocking of some or all the outputs depending on the type of alarm When more than one alarm is activated at the same time the display automatically scrolls through the active alarms VIS Visualization It indicates the type of alarm shown on the display L UH RE Reset Type of reset AUT AUTOMATIC RESET Some alarms are automatically reset when the cause is no longer present they disappear from the display MAN MANUAL RESET Pressing RESUME button for more than 5 seconds or set the unit on OFF mode and then set on ON mode again If the alarm conditions have been removed the instrument returns to the normal operation and the alarm relay is de energised If on the other hand the alarm conditions persist then call for technical service The centre of the board also houses a jumper J3 which must be set on the position shown in the electrical diagram supplied with the unit between ID COM and INT When the jumper is positioned in any other position the display shows several alarms therefore check this jumper when this is repeated DESCRIPTION EE ACTION The number of operating hours of the supply fan Alarm Air filter should be changed and reset parameter F3 exceeds the
13. l installation The installation procedure is as following 1 To detach the front panel of the terminal from the rear shell place a flat head screwdriver in the slot in the centre of the bottom of the box and release the locking flap 2 Raise the front panel using a hinge movement using the upper edge of the instrument as the pivot and raising the lower edge Sub base 3 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 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 AIR CONDITIONING UNIT Two lead shielded cable with a cross section of 1mm Power board Terminal Thermostat Installed in the room Maximum length allowed is 150m Electrical panel in the unit 4 Connect the cables to the terminals on the rear shell of the box as indicated in and in electrical diagram Sub base When making the connection to the power board special attention must be paid to the polarity th
14. ling of the installation and carefully follow the instructions It is very important to be properly trained in handling the equipment These operating instructions must be kept in a safe place near the equipment Like most equipment the unit requires regular maintenance This section concerns the maintenance personnel and management If you have any queries or would like to receive further information on any aspect relating to your equipment do not hesitate to contact us 17 18 BELGIUM LENNOX BENELUX N V S A LUXEMBOURG t l 32 3633 3045 fax 32 3 633 00 89 email info be Qlennoxbenelux com CZECH REPUBLIC JANKA LENNOX a s t l 420 2510 88 111 fax 420 2579 10393 email janka janka cz FRANCE LENNOX FRANCE t l 33 164 76 23 23 fax 33164 7635 75 email marketingfrance lennoxfrance com GERMANY LENNOX DEUTSCHLAND GmbH t l 49 69 42 09 790 fax 49 69 42 09 79 40 email info de lennoxdeutschland com PRAMEN GRS NETHERLANDS LENNOX BENELUX B V SEN NN t l 31 33 2471 800 fax 31 33 2459 220 email infoQlennoxbenelux com NS LENNOX POLSKA Sp z t l 48 22 832 26 61 fax 48 22 832 26 62 email info lennoxpolska pl PORTUGAL LENNOX PORTUGAL LDA t l 351 22 998 33 70 fax 351 22 998 33 79 email info lennoxportugal com RUSSIA LENNOX DISTRIBUTION MOSCOW t l 7 095 933 2955
15. maintenance threshold set by parameter Visualization 656110 0 valve press simultaneously the set button with and front buttons HIT Indicates that i is working at indoor temperatures The unit can operate in this situation only for short higher than 32 C or ambient probe is faulty Alarm periods of time If this situation remains check or visualization change the probe and correct hot air stratification Indicates that unit is working at indoor temperatures inlet outside cold air etc lower than 10 C or ambient probe is faulty This alarm may indicate the following problems These protections are manual reset Set the unit on High pressure switch protection TE OFF mode and then set on ON mode again through MAN Compressor internal protection open Unit will stop the terminal If the alarm shows up again check Outdoor fan internal protection open continuity of the protections and check or change Low pressure switch protection the faulty component This protection is manual reset Press the HESUME button for 5 seconds until alarm disappear If the alarm shows up again check continuity of the protection and check or change the faulty component Indoor fan protection open or disconnected Unit will stop Terminal does not receive data communication from ESR Turn off power supply and turn on again the power board If the problem persists must proceed to change EST Power board does not receive data c
16. nt of 1mm ud no longer than 20 meters Remote ambient sensor ref ASW TC 11000 r Remote duct sensor ref NTCO 15WP00 IP68 STEP 2 Remove the jumper J1 located on the power board of the terminal thermostat follow the electrical diagram supplied with the unit Power board of terminal thermostat J1 s ndard position O Power board of the terminal thermostat Change position Q QOO STEP 3 Change parameter S8 to 1 STEP 4 Only for the optional remote duct sensor Select CONT as the fan operating mode in order to the room temperature will be detected continuously the display shows the symbol A See page 5 of this manual to select the fan operating mode 15 THERMOSTATIC FREECOOLING AS AN OPTION Programming option is included on it You can connect as an option remote sensors To use this option an outdoor probe is connected RC clock 21C set 22C mode AUTO AY fan E AVs T O B1 hold amp 24v resume B2 7 90 91 31 30 co GN Om n n n GO r FE O This option approaches external conditions for cooling mode The freecooling is enabled when outdoor temperature is below indoor temperature For these conditions air intake gate is opened Two thermostats on the air discharge are incorporated for the safety of the unit
17. ommunication from Unit will stop components the terminal NOTE This alarm could be caused by a faulty EPROM error shielded cable connection induction or be too long E 1 Temperature regulation probe error or connection cable Unit will stop Check the position of jumper J1 shown on page 15 AUT broken check the cable Outdoor temperature probe error or connection cable il Check the outdoor probe connection and jumpers broken freecooling option heat pump Unit will stop situation according to the electrical wiring diagram Outdoor coil temperature probe error or connection Unit will stop Check probe connections and check the cable cable broken 14 REMOTE SENSORS AS AN OPTION As an option there are available two types of remotes sensors REMOTE DUCT SENSOR The sensor should be located at the return air duct recording the room temperature continuously REMOTE AMBIENT SENSOR The sensor should be located at the room which has to be conditioned Both sensors should be used when the terminal thermostat can be located on a position where the ambient temperature could not be measured with accuracy Example High ceiling rooms or terminal thermostat on a place different from the room to be conditioned To install them proceed as follow STEP 1 Connect the probe to AVSS y B1 terminal located on the sub base of the terminal thermostat Sub base r Use two lead screen wire with section o
18. room temperature Desired room temperature COMFORT set point 239C set point 239C BRIEF Increase 4 C the set point selected Decrease 4 C the set point selected on comfort category on comfort category A ak NIGHT Increase 2 C the set point selected Decrease 2 C the set point selected I on comfort category on comfort category How to change the desired temperature set point for the different categories Pressing the SET button in manual operating mode selects comfort category During the time the symbol is flashing pressing the front buttons and W changes the currently set point used by the control This is the set point reference for the rest of the categories Following the same steps we can select the categories brief absence or night I and with the front buttons A and assign the value between 0 C to 10 C for each category which means the degrees increased or decrease from the comfort category set point CLOCK AND TIME BANDS AS AN OPTION This Terminal Thermostat with clock function is a programmable terminal programming the time bands With this terminal set point desired can be set for 24 hours a day seven days a week time bands terminal is supplied as an option therefore it must be specifically requested if needed Proceed as follow to program the time bands 1 Set the actual time to make once when terminal is installed for the first time Mot We Th Fr Sa S
19. ss resume button to return to time band operation before the three hours elapse Change set point using the front buttons Shows the time band during the set point will be set After three hours the controller returns to the programmed settings B Change the desired set point for an unlimited period i i The set point will remain until Change set point resume button is pressing to return using the front buttons to time band operation Press hold PROGRAMMING THE PARAMETERS Incorrect programming of the parameters may cause damage to the unit And consequently All modifications on the operating unit parameters must be carried out by qualified personnel the lost of guarantee to the unit Proceed as follow to reach the operating parameters of the unit Step 1 clock UL set ca mode R fan hold resume Pressing simultaneously both set and hold buttons the display shows the first of the unit operating parameters Step 2 Step 3 Step 4 Step 5 clock clock set set A mode mode Y fan fan hold hold resume resume The parameters The modifications Parameters Press set are scrolled are accepted by allow a change to accept using the front pressing set again while they are modifications buttons flashing To continue modifying other operating parameters follow steps 2 3 4 To exit programming mode and accept the modifications to the parameters pre
20. ss the hold button To exit programming mode and NOT accept the modifications to the parameters press the resume button or wait for 1 minute of inactivity the final 15 seconds are signalled by the flashing of the characters on the display PROGRAMMING THE PARAMETERS The table below gives the following information for each parameter COD The code which appears on the display The field variation for the parameters MIN Minimum value for the parameter MAX Maximum value for the parameter UNIT The unit of measure used C Centigrade F Fahrenheit s seconds min minutes h hours Khrs hoursx1000 VAR Minimum variation allowed DEF The default value factory set VALUES COD DESCRIPTION MIN MAX UNIT VAR DEF Regulation probe calibration 54 Value to be added to subtracted from the value measured by the 12 12 C F 0 5 temperature probe used for the regulation Input digital filter filter for analogue inputs S6 1 the fastest 1115 1 1 Unit for temperature measure 57 57 0 the temperature is visualized on C 1 1 57 1 the temperature is visualized F Indicates the presence or an external or internal temperature probe oji 1 0 R1 Shows the current value on which temperature regulation is based C 23 set point R Temperauredeadzone 9 o GF osn sement OF losn 4 mo mwlaysemendfeena fa fe OF osn 1 HOW REGULATION PARAMETERS WORK Through
21. u Mo SEZ mig pe m Suu Paraya ra PS v v The days are scrolled Press clock Select actual hour and Press clock using the front buttons to accept minutes with the front to accept buttons There are 6 possible time bands indicated respectively by the letters t1 t2 t3 t4 t5 t6 The bands may be at different times for each day of the week and at different set points yet they must be chosen from the three categories previously programmed EXAMPLE The table below shows an example of time bands clock for a week Tu We Th Fr Sa Su Tuesday Wednesday Thursday Friday Saturday Sunday 22 00 l 22 00 b 22 00 b Use the table below to design your own programming schedule Mo Tu We Th Fr Sa Su Monday Tuesday Wednesday Thursday Friday Saturday Sunday t1 CLOCK AND TIME BANDS PROGRAMMING PROGRAMMING PROCESS NI I Mo Tu We Th Fr Sa Su L ZIN m a Set the program start day with OUO 2Wo Tu We Th Fr Sa Su the front buttons and press ann clock to accept To set a program press clock for 5 seconds t1 will show on the displa Set the start hour and minutes pay for the first band with the front buttons and press clock to accept Mo Monday Tu Tuesday e ay Set the set point category for Th Thursday the band with the front Fr Friday 5 buttons while flashing press
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