USER MANUAL TREF GB
Contents
1. T 6mmq 4X10 mmq T 6mmq 4X10 T 6mmq Plug Fan 400V 3Ph N 50Hz 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 mmq T 6mmq 4X10 T 6mmq 4X16 T 6mmq 4X16 T 6mmq 4X16 mmq T 6mmq 4X16 T 6mmq 4X16 T 6mmq 4X16 T 6mmq LENNOX LENNOX Vacuum and charging operations for DX type units This type of work must be carried out by qualified personnel only trained to do their job in accordance with current laws and regulations 1 Introduction The contemporaneous presence of liquid and vapour requires for both to be in a state of saturation Gibb s law as shown in fig 1 In thermal equilibrated conditions the pressure in the tank corresponds to the ambient temperature Withdrawal of refrigerant from the tank has following effects withdrawal of refrigerant charge gt pressure drop inside the tank pressure drop inside the tank gt T drop amp change of status T drop amp change of status gt evaporation of part of the liquid causing a cooling down of the liquid cooling of liquid gt thermal exchange with ambient air further evaporation of remaining liquid the original pressure in the tank will be restored after a certain period of time T tank ambient Saturated gas Saturated liquid Enthalpy h 16 INNOV IOM 0907 E LENNOX 2 Full vacuum and charge of the unit2. relief valve is accessible in the units from front of the machines In INNOV units there is a flexible pipe connecting the upper part of the coil to the front of the unit for an easier accessibility 26 INNOV IOM 0907 E LENNOX Set the right fan speed The adopted fans are of the backward curved blades type in combination with a 4 poles e motor This kind of fan has very high performances so that it s speed has to be reduced in order to match to the nominal air flow with the real external pressure drops in case of wrong selection the air flow may exceed the limits with possible water dragging out from the coils down flow units External pressure drops DP Pa Unit performance full speed Unit performance intermediate speed Unit performance low speed Nominal MEOW Af fon Air flow over the limits The fan speed has to be selected according to the enclosed table by using the manual switch installed in the E Panel and or by changing the wire connections of the autotransformer for different selection than the four already available on the manual switch o Position 0 fan OFF o Position 1 30 Paavailable nominal air volume 190 V o Position 2 100 Pa available nominal air volume 230 V o Position 3 max Pa available 2 nominal air volume 400 V Other settings can be selected during the order process Inthe EC fans the rotation speeds are selected with different values o
3. 46 83 140 207 298 373 448 Base Filter AddColl 18 55 92 149 216 307 382 457 FreeCooling Filler 2 364 734 1304 1974 288 363 438 Free Cooling Filter Heater _ 2 35 92 159 250 325 400 Free Cooling Filter Add col 12 49 106 173 264 339 414 Base Filter 7 22 59 96 153 220 311 386 461 Base Filter Heater 21 58 115 182 273 348 423 Base Filter Add Coil 34 71 128 195 286 361 436 Free Cooling Filter 1 1 364 73 4 1304 1974 288 363 438 Free Cooling Filter Heater 1 35 92 159 250 325 400 Free Cooling Filler Add col 12 49 106 173 264 339 414 Base 47 84 121 178 245 336 411 486 Base Filter Heater 8 45 82 139 206 297 372 447 Base Filter Add Coil 24 61 98 155 222 313 388 463 Free Cooling Filter 5 42 99 166 257 332 407 Free Cooling Filter Heater 4 61 128 219 294 369 Free Cooling Filter Add col 19 76 143 234 309 384 DHADR 602 692 762 190V 205V 215V 230V 250V 290V 330V 360V 400V Base Filter 16 53 90 147 214 305 380 455 Base Filter Heater o 143
4. 513 1083 1753 Base Filter Add Col Free Cooling Filter 5 99 166 257 332 407 Free Cooling Filter Heater 4 61 128 219 294 369 Free Cooling Filter Add col 19 76 143 234 309 384 28 INNOV IOM 0907 E LENNOX AESP Pa with the different control tensions 0 10 V for the EC fan s Base 1115 925 173 5 2545 3355 416 5 Base Filter Heater J 496 1306 2116 2926 373 6_ Base Filter Add Col J 644 145 4 2264 3074 3884 Free Cooling Filter x J 473 1283 209 3 290 3 3713 Free Cooling Filter Heater 43 853 1663 2473 3283 Free Cooling Filter Addcol 191 100 1 181 1 262 1 3431 Base Fitler 665 147 5 228 5 309 5 390 5 Base Filter Heater 295 104 5 185 5 2665 3475 Base Filter Add Col J 383 1193 200 3 281 3 3623 FreeCooing Filler 473 1283 209 3 2903 3713 Free Cooling Filter Heater 43 853 1663 247 3 3283 Free Cooling Filter 191 100 1 181 1 262 1 3431 Base Filter 7 2 4 360 1170 198 0 279 0 360 0 441 0_ Base Filter H
5. 10 Power supply 10 90 r h Storage conditions 55 90 r h Power supply limits and Storage conditions for CW versions Model DHC C R Nominal Value 10 Power supply 10 90 r h Storage conditions 60 90 r h Application limits DHA C R Air condensed versions Temp RH lt 65 3 28 Condenser air 18 Temp 20 40 45 DHW C H Water condensed versions 4 INNO V Q IOM 0907 E LENNOX Indoor air T RH lt 65 3 289 Condenser 18 b water Temp 25 40 43 DHC C R Chilled Water versions Cooling circuit Indoor air T RH lt 65 96 35 1 27 Chilled water 20 mp The entire refrigerating circuit is assembled in our warehouse including all pipe work and using only primary brand for components The workers involved in the welding and pipe work process are qualified by a third part according CEE 97 23 PED directive it is worth to be underlined that this qualification for workers were not request but it is our own decision taking care of the quality and or in general to the customer satisfaction All DX unit A W F D Q versions are prechargerd with dry nitrogen for A D or with 407 refrigerant for W F Q versions Other refrigerants like R22 R134a R410A are available on request a
6. 3 Vacuum cycle In general it is better to apply a long rather than a hard vacuum reaching a low pressure too abruptly may in fact cause that any remaining humidity evaporates instantaneously thus freezing part of it P Pa 150 u 200 s 4 Time The figure fig 3 represents a vacuum cycle and an optimal subsequent pressure rise for the refrigeration devices we manufacture Generally in bigger refrigeration systems or if there is a suspicion of an extensive quantity of humidity in the refrigeration circuit the vacuum needs to be broken by using anhydrous nitrogen Then the steps of evacuation need to be repeated as described before This operation facilitates the removal of remaining and or frozen humidity during the evacuation process 4 Evacuating a circuit contaminated with refrigerant The first step is to remove the refrigerant from the circuit To do this a specific machine is necessary with a drying compressor in order to recover the refrigerant Refrigerants all tend to dissolve in oil compressor sump The Oil figure illustrates a specific property Charles Law of gases which are more soluble in liquids as the pressure increases but less soluble as the temperature increases T oil Pressure 12 5 1 fig of refrigerant in oil If the oil in the sump is held at a constant pressure an increase in temperature will significantly reduce the amount of refrigerant dissolved
7. 3340 4150 Base Filter Heater C 528 133 8 2148 2958 376 8 Base Filter Add Col ___ _ 682 1492 2302 311 22 3922 Free Cooling Filter __ J 431 1241 205 1 286 1 3671 Free Cooling Filter Heater 49 859 1669 2479 328 9 Free Cooling Filter Addcol 200 101 0 182 0 263 0 3440 INNOV IOM 0907 E 29 LENNOX REPAIRING THE COOLING CIRCUIT Warning while performing repairs on the cooling circuit or maintenance work on the compressors make sure the circuit is left open for as less time as possible Even if briefly exposed to air ester oils tend to absorb large amounts of humidity which results in the formation of weak acids If the cooling circuit has undergone any repairs the following operations must be carried out tightness test evacuation and drying of the cooling circuit charging with refrigerant If the system has to be drained always recover the refrigerant present in the circuit using suitable equipment the refrigerant should be handled exclusively in the liquid phase Tightness test Fill the circuit with anhydrous nitrogen supplied from a tank with a pressure reducing valve until the pressure rises to 22 bars During the pressurisation phase do not exceed a pressure of 22 bars on the compressor low pressure side The presence of any leaks must be determined
8. avoid the fixing of the thermostat bulb until the operation is completed It is important to ensure that the valve orifice remains open in order to allow the passage of refrigerant also towards the condenser liquid receiver If possible avoid the charge of refrigerant into the suction line of the compressor as this may cause excessive dilution of the lubricant In any case verify first the necessary volume of the crankcase and compare it with the required charge volumes ELECTRICAL CONNECTIONS GENERALITIES A Before carrying out any job on electrical parts make sure the power supply is disconnected Check that the mains electricity supply is compatible with the specifications voltage number of phases frequency shown on the unit rating plate The power connection for single phase loads is to be made with a three pole cable and N wire at the centre of the star optional power supply w o neutral A The size of the cable and line protections must conform to the specifications provided in the wiring diagram The supply voltage may not undergo fluctuations exceeding 5 and the unbalance between phases must always be below 2 conditions will result in the immediate invalidation of the warranty A The above operating conditions must always be complied with failure to ensure said The electrical connections must be made in accordance with the information shown in the wiring diagram provided with the unit and with c
9. carrying out any work on the unit or accessing internal parts make sure you have disconnected it from the mains electricity supply The upper part and the outlet pipe of the compressor reach high temperatures Be especially careful when working in the surrounding area with the panels off Be especially careful when working in proximity to finned coils since the 0 11 mm thick aluminium fins can cause superficial injuries due to cuts After completing maintenance jobs always replace the panels enclosing the units and secure them with the fastening screws provided gt P P P P 22 INNOV IOM 0907 E GENERALITES LENNOX To guarantee a constantly satisfactory performance over time it is advisable to carry out routine maintenance and checks as described below The indications below are related to standard tear and wear Operation e Check the efficiency of all the control and safety devices e Check the terminals on the electric control board and compressor terminal boards to ensure that they are securely tightened The movable and fixed contacts of the circuit breakers must be periodically cleaned and replaced whenever they show signs of deterioration Check the refrigerant level by means of the liquid level indicator e Check the efficiency of the differential air pressure switch and dirty filter differential pressure switch e Check the condition of the air filter and replace it if necessary e Check the humidity indicator gre
10. in it thus ensuring that the lubricating function desired is maintained The problem of inadequate lubrication occurs if the crankcase is not duly heated above all after seasonal interruptions when due to the suction effect of the compressor there is an abrupt drop in pressure inside INNOV IOM 0907 E 17 LENNOX the sump which results in considerable evaporation of the refrigerant previously dissolved in the oil If heating elements were not installed this phenomenon would cause two problems The release of refrigerant from the cooling circuit tends to cool down the oil and thus actually creates the opposite effect by keeping more refrigerant dissolved in the oil for this reason it is advisable to switch on if available the crankcase heater during the evacuation process If a high of refrigerant gets in contact with the Pirani gauge vacuum sensor it may mislead this sensitive sensor and misinterpret the value for a certain period of time For this reason if no machine for recovering refrigerant is available it is nonetheless advisable to switch on the crankcase heater and to avoid full vacuum before the circuit has been adequately purged of refrigerant The refrigerant may in fact dissolve in the oil of the vacuum pump reducing its performance for a long time hours 5 Charging positions single point The best position to charge the unit is the section between the thermostatic valve and the evaporator Take care to
11. the kind that trigger directly their efficiency will not be affected by any faults occurring in the microprocessor control circuit in compliance with 97 23 PED Control microprocessor the microprocessor built into the unit allows the different operating parameters to be controlled from a set of pushbuttons situated on the electric control board O O O O O Switching on off of compressor s to maintain the temperature set point T inside the shelter Alarm management High pressure Dirty filters alarm optional Air flow alarm Alarm signalling Display of operating parameters RS232 RS485 serial output management optional Phase sequence error Not displayed by the mP but prevents the compressor from starting up see microprocessor control manual for further details also in relation to particular customer specifications INNOV IOM 0907 E LENNOX BASIC COOLING CIRCUIT for DX versions each circuit Supply limits Ref Description 11 Compressor HP Pressure switch Evaporating coil LP pressure switch Ref Description 8 ____ ing coi 9 Pressure transmitter INNOV IOM 0907 E 7 LENNOX Basic cooling circuit for CW versions Ref Description 1 Cphiled water inlet Chilled water outlet S3wayvave 3 way valve Fan Fan l Coil Heat exchanger INNOV IOM 0907 E LENNOX Installation warnings General rules When installing or servici
12. Do not place any obstacles near the units and make sure that the air flow is not impeded by obstacles and or situations causing back suction D mm DHCDCO080 DHCUCOO80 60 60 49 DHCDCO110 DHCUCO110 600 60 49 DHCDCO140 DHCUCO 140 90 650 49 DHCDC0160 DHCUCO160 90 60 49 DHADC0060 DHAUC0060 DHADC0080 DHAUC0080 600 1875 600 DHADC0100 DHAUCO100 90 60 449 ___ 90 2 90 2 1200 2 1200 GI GI GO CO CO CO CO GI GO GO CO CO INNOV IOM 0907 E 13 The following steps should be carried out to ensure proper installation Apply a anti vibration rubber lining between the unit and the bottom Position the unit on the floor floorstand base frame LENNOX The recommended sizes for the power cables and emergency line are shown in the table below INNV CW DHCDR0080 DHCURO0080 DHCDRO0110 DHCURO 1 10 DHCDRO0140 DHCURO0140 DHCDRO0160 DHCURO0160 DHCDRO0200 DHCURO0200 DHCDR0230 DHCUR0230 DHCDC0080 DHCUC0080 DHCDC0110 DHCUC0110 DHCDC0140 DHCUC0140 DHCDC0160 DHCUC0160 DHCDC0200 DHCUC0200 DHCDC0230 DHCUC0230 DHCDRO0300 DHCURO0300 DHCDRO0400 DHCURO0400 DHCDRO0500 DHCURO0500 DHCDRO0650 DHCURO0650 DHCDR0900 DHCUR9300 DHCDR1000 DHCUR1000 Main power supply Cable type Plug Fan 230V 1Ph 50Hz 4X6 mmq T 6mmq 4X6 mmq T 6mmq 4X6 mmq T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq Centrifugal Fa
13. INNOV IOM 0907 E LENNOX Warning the refrigerant R407C requires POE polyolester oil of the type and viscosity indicated on the compressor rating plate For no reason should oil of a different type be introduced into the oil circuit Real P compressor outlet Average T T1 1T2 2 T1 start of condensation DEW POINT T2 end of condensation BUBBLE POINT Heat content h The difference between the Dew Point and Bubble Point is known as GLIDE and this is a characteristic property of refrigerant mixtures If pure fluids are used the phase change occurs at a constant T and thus the glide is equal to zero INNOV IOM 0907 E 33 TROUBLESHOOTING LENNOX On the next pages you will find a list of the most common reasons that may cause the package unit to fail or any malfunction This causes are broken down according to easily identifiable symptoms You should be extremely careful when attempting to implement any of the possible remedies suggested overconfidence can result in injuries even serious ones to inexpert individuals Therefore once the cause has been identified you are advised to contact the manufacturer or a qualified technician for help FAULT The unit does not start The compressor is noisy Presence of abnormally high pressure 34 Possible causes No power supply The electronic card is cut off from the power supply Alarms have been released The phase sequence
14. LENNOX gt Installation operating and maintenance INNOV Q CENT amp RADIAL FAN eee Providing indoor climate comfort INNOV IOM 0907 E LENNOX Index IOM INNV General description 2 Basic cooling circuit 7 Installation Warning 9 Inspection 9 Transport 9 Unpacking 10 Positionning 10 Installation 13 Electrical connections 18 Starting up 19 Preliminary checks 19 Setting operating parameters 20 Generalities 20 Maximum pressure switch 21 Minimum pressure switch 21 Routine maintenance and cheks 22 Warnings 22 Generalities 23 Repairing cooling circuit 30 Starting up for the first time 32 otarting operartion 32 Checks during operation 32 Checking refrigerant level Dx versions 32 Troubleshooting 34 LENNOX have been providing environmental solutions since 1895 our range of INNV continues to meet the standards that have made LENNOX a household name Flexible design solutions to meet YOUR needs and uncompromising attention to detail Engineered to last simple to maintain and Quality that comes as standard Information on local contacts at www lennoxeurope com All the technical and technological information contained in this manual including any drawing and technical descriptions provided by us remain the property of Lennox and must not be utilised except in operation of this product reproduced issued to or made available to third parties without the prior written agreement of Lennox The technical inform
15. ation and specifications contained in this manual are for reference only The manufacturer reserves the right to modify these without warning and without obligation to modify equipment already sold INNOV IOM 0907 E 1 LENNOX General Description INNV CCAC self contained units are specially designed for installation in technological environments such as Computer rooms laboratories and in general where a high precision in climate control and a 24h day operation are requested INNV units represent the state of the art between technology and design as well as all HiRef S p A products thanks to their characteristics INNV can be installed also in offices where people are working The depth of 795 mm for all versions allows the compatibility with standard electronic devices furthermore the innovative design and the high tech selected colours make INNV units complementary to the last generation of IT devices The internal design of the units in firstly made looking to efficiency and reliability but don t loosing accessibility all components including e heaters fans compressors valves etc can be maintained from the front and furthermore the door s are dismountable in few seconds thanks to an innovative hinge this is very important when units are installed in small corridors The exclusive use of primary brands components and a fully integrated development process CAD CAM CAE stands for highest possible quality level regarding efficiency
16. e of the aforesaid regulations Therefore special care should be taken when carrying out maintenance work to minimise refrigerant leaks INNOV IOM 0907 E 31 LENNOX STARTING UP FOR THE FIRST TIME STARTING OPERATION Before starting the unit turn the main switch on select the operating mode desired from the control panel and press the ON button on the control panel If the unit fails to start up check if the service thermostat has been set according to the nominal values provided You should not disconnect the unit from the power supply during periods when it is inoperative but only when it is to be taken out of service for a prolonged period e g at the end of the season CHECKS DURING OPERATION Check the phase sequence relay on the control board to verify whether the phases occur in the correct sequence if they do not disconnect the unit from power supply and invert two phases of the incoming three pole cable Never attempt to modify internal electrical connections any undue modifications will immediately invalidate the warranty CHECKING THE REFRIGERANT LEVEL DX Versions After a few hours of operation check whether the liquid level indicator has a green ring a yellow colour indicates the presence of humidity in the circuit In such a case the circuit must be dehumidified by qualified personnel Large quantities of bubbles should not appear through the liquid level indicator A constant passage of nume
17. eater 788 1598 2408 3218 4028 Base Filter AddCoil 925 173 5 2545 3355 416 5 Free Cooling Filter x J 765 157 5 238 5 319 5 4005 Free Cooling Filter Heater 383 1193 2003 281 3 3623 Free Cooling Filter Add col 52 0 133 0 214 0 295 0 376 0 Base 15 9 969 1779 2589 3399 420 9 Base Filter Heater 2 1 58 7 1397 220 7 3017 38 7 Base Filter AddCoil J 72 4 153 4 2344 315 4 396 4 Free Cooling Filter 2 1 76 5 157 5 2385 319 5 400 5 Free Cooling Filter Heater 38 3 119 3 2003 281 3 362 3 Free Cooling Filter Addcol 520 133 0 2140 295 0 376 0 Base Filter 40 4 1214 2024 283 4 364 4 445 4 Base Filter Heater 7 22 832 1642 2452 326 2 4072 Base Filter Add Coil 7 2 176 986 179 6 2606 341 6 4226 Free Cooling Filter J 431 1241 205 1 286 1 3671 Free Cooling Filter Heater 49 859 1669 2479 328 9 Free Cooling Filter 200 101 0 182 0 263 0 3440 Base Filer 100 91 0 172 0 253 0
18. en dry yellow humid on the liquid level indicator if the indicator is not green as shown on the indicator sticker replace the filter Inspecting the air filter DH DC DOWNFLOW CW and DX version Frequency Once a year Once a year Every 6 months DX Every 6 months Every 6 months Every 6 months DX Remove the panel above the evaporator fan to access the damper and air filter compartment Pull out the air filter Check the condition of the filter and replace it if necessary INNOV IOM 0907 E 23 Inspecting the air filter DH DR DOWNFLOW CW and DX version Open the front panels to access the air filter compartment Pull out the air filter Check the condition of the filter and replace it if necessary LENNOX 24 INNOV IOM 0907 E LENNOX Inspecting the air filter DH UC UPFLOW CW DX version Remove the panel above the evaporator fan to access the damper and air filter compartment Pull out the air filter Check the condition of the filter and replace it if necessary Inspecting the air filter DH UR UPFLOW CW and DX version Open the front panels to access the air filter compartment Remove the screws and the metallic support no need for tools Extract the filter on the right Pull on the right side the second filter and then extract it INNOV IOM 0907 E 25 LENNOX Purging the air out of the water coil CW version
19. f the control tension 0 10V If in the unit is present the advanced control the right value of the control tension is set by the keyboard present in the advanced control With the basic control the control tension is set with a manual potential installed in the E Panel To know the tension set with the potential it is necessary to use an external tool Voltmeter AESP Pa with the different supply tensions for the plug fan s INNOV IOM 0907 E 27 LENNOX Base Filter 28 91 163 258 327 396 _ Base Filter Heater 54 126 221 290 359 Base Filter Add Coil 62 134 229 298 367 Free Cooling Filter 7 2 53 125 220 289 358 Free Cooling Filter Heater 1 71 166 235 304 _ Free Cooling Filter Add coil 14 86 181 250 319 Base Filter 9 72 144 239 308 377 Base Filter Heater 19 9t 186 255 9324 Base Filter Add Coil 34 106 201 270 339 Free Cooling Filter 7 53 125 220 289 358 Free Cooling Filter Heater 7t 166 235 304 Free Cooling Filter Add coil 14 86 181 250 319 Base Fiter 42 79 116 173 240 331 406 481 Base Filter Heater 9
20. flow Differential air pressure switch dirty Pa 70 20 filter Maximum pressure switch Bar g 28 0 Manual Minimum pressure switch Bar g 2 t5 Automatic Modulating condensation control 14 7 devices DX versions Time lapse between two S 480 compressor starts 20 INNOV IOM 0907 E LENNOX MAXIMUM PRESSURE SWITCH The high pressure switch stops the compressor when the outlet pressure exceeds the set value Warning do not attempt to change the setting of the maximum pressure switch Should the latter fail to trip in the event of a pressure increase the pressure relief valve will open The high pressure switch must be manually reset this is possible only when the pressure falls below the set differential see Table Ill MINIMUM PRESSURE SWITCH The low pressure switch stops the compressor when the inlet pressure falls below the set value for more than 180 seconds The switch is automatically reset when the pressure rises above the set differential see Table II INNOV IOM 0907 E 21 LENNOX ROUTINE MAINTENANCE AND CHECKS The only operations to be performed by the user are to switch the unit on and off All other operations are to be considered maintenance work and must thus be carried out by qualified personnel trained to do their job in accordance with current laws and regulations WARNINGS All the operations described in this chapter MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL ONLY Before
21. h the steam piping and the drain pan or simply to substitute a damaged side panel all this problems are very rare but with INNV units it is possible to solve them The shape of the units is characterized with the curved edges with variable radium as for all HiRef products this feature is obtained using special tools and gives both a good aesthetic and advantages against injuries The compressor compartment is separated from the air flow and the special internal design allows the simple dismounting of the upper part of it ensuring an insuperable accessibility to all refrigerating components All fixing elements are made in stainless steel or in non corroding materials The dray pan is made in stainless steel in order to ensure long time operation without damages All panels are thermally insulated with a polyurethane foam class 1 according UL 94 norms this material thanks to the open cells gives good performances in sound absorption As an option sandwich panels are available in this case mineral fibres are closed between the panel and a second sheet of metal giving the maximum in terms of internal cleaning Double skin panels are classified between non flammable materials class A1 according DIN 4102 norms the sound insulation is better than the standard solution but the internal reflected sound power will increase the amount in delivery side 2dB Power supply limits and Storage conditions for DX versions Model DHA C R Nominal Value
22. he tank of refrigerant gas to the male 1 4 SAE inlet situated on the liquid line after discharging a little gas to eliminate air in the connection pipe Fill with refrigerant in liquid form until you reach 75 of the total charge Then connect to the inlet on the pipe between the thermostatic valve and evaporator and complete the charging process with the refrigerant in liquid form until no more bubbles can be seen on the liquid level indicator and the operating parameters specified in section 4 4 have been reached Since R407C is a ternary mixture charging must take place exclusively with liquid refrigerant to ensure the correct percentages of the three constituents Introduce refrigerant through the inlet in the liquid line A unit that was originally charged with R407C in the factory must not be charged with R22 or other refrigerants without the written authorisation of HiRef S p A Environmental protection The law implementing the regulations reg EEC 2037 00 which govern the use of ozone depleting substances and greenhouse gases bans the dispersal of refrigerant gases in the environment and requires whoever is in their possession to recover them and at the end of their useful life either to return them to the dealer or take them to a suitable waste disposal facility The refrigerant HFC R407C is not harmful to the ozone layer but is included among the substances responsible for the greenhouse effect and thus falls within the scop
23. her the heating elements are working properly check the lower part of the compressors it should be warm or in any case at a temperature 10 15 C higher than the ambient temperature Pressure R407C in oil The diagram above illustrates a specific property of gases Charles Law which are more soluble in liquids as the pressure increases but less soluble as the temperature increases if the oil in the sump is held at a constant pressure an increase in temperature will significantly reduce the amount of refrigerant dissolved in it thus ensuring that the desired lubricating function is maintained SETTING OPERATING PARAMETERS INNOV IOM 0907 E 19 LENNOX GENERALITIES All the control devices are set and tested in the factory before the unit is dispatched However after the unit has been in service for a reasonable period of time you can perform a check on the operating and safety devices The settings are shown in Tables II and Ill All servicing of the equipment is to be considered extraordinary maintenance and may be carried out BY QUALIFIED TECHNICIANS ONLY incorrect settings may cause serious damage to the unit and injuries to persons The operating parameters and control system settings configurable by means of the microprocessor control are password protected if they have a potential impact on the integrity of the unit TABLE II SETTING OF CONTROL DEVICES Differential air pressure switch air Pa 50 30
24. is wrong The compressor is rotating in the wrong direction Insufficient airflow the condenser through Presence of air in the refrigerant circuit as revealed by the presence of bubbles in the flow indicator also with sub cooling values exceeding 5 C Corrective actions Check if power is being supplied both to the primary and auxiliary circuits Check the fuses Check whether any alarms are signalled on the microprocessor control panel eliminate the causes and restart the unit Invert two phases in the primary power line after disconnecting them upstream from the unit Check the phase sequence relay Invert the phases on the terminal board after disconnecting the unit and contact the manufacturer Check for the presence of obstructions in the condenser section ventilation circuit Check whether the condenser coil surface is obstructed Check the condensation control device optional Drain and pressurise the circuit and check for leaks Evacuate slowly for more than 3 hours until reaching a pressure of 0 1 Pa and then recharge in the liquid phase INNOV IOM 0907 E FAULT Presence of abnormally high pressure Low condensation pressure Low evaporation pressure The compressor does not start Water out from the unit Water out from the unit Water out from the unit INNOV IOM 0907 E Possible causes Unit overcharged as revealed by a Sub cooling of more than 8 C Thermostatic valve a
25. lways keep it in an upright position The unit should be lifted using the pallet it is packed on a transpallet or similar conveyance means should be used Warning In all lifting operations make sure that the unit is securely anchored in order to prevent accidental falling or overturning Unpacking INNOV IOM 0907 E 9 LENNOX The packing must be carefully removed to avoid the risk of damaging the unit Different packing materials are used wood cardboard nylon etc It is recommended to keep them separately and deliver them to suitable waste disposal or recycling facilities in order to minimise their environmental impact Positioning Bear in mind the following aspects when choosing the best site for installing the unit and the relative connections Positioning and dimensions of the coupling flanges Location of power supply Solidity of the supporting floor It is recommended to first prepare holes in the floor wall for passing through the power cables and for the air outlet down flow units The dimensions of the air outlet and the positions of the holes for the screw anchors and power cables are shown below 10 INNOV IOM 0907 E INNOV IOM 0907 E Section 4 4 DHADCOO60 DHAUCOO60 60 LENNOX 11 12 od OPG E m LENNOX INNOV IOM 0907 E LENNOX INSTALLATION The INNV air conditioning unit is suitable for all environments except aggressive ones
26. n 230V 1Ph 50Hz 400V 3Ph N 50Hz Plug Fan 4X6 T 4X6 T 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 mmq T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 mmq T 6mmq INNOV IOM 0907 E INNOV IOM 0907 E Unitmode Main power DHADROO60 DHAURO060 DHADR0080 DHAURO0080 DHADR0100 DHAURO0100 DHADR0110 DHAURO0110 DHADR0130 DHAUR0130 DHADRO0160 DHAURO160 DHADRO190 DHAURO 190 DHADRO0205 DHAURO0205 DHADCOO060 DHAUCO060 DHADC0080 DHAUC0080 DHADC0100 DHAUC0100 DHADC0110 DHAUC0110 DHADC0130 DHAUC0130 DHADCO160 DHAUCO160 DHADC0190 DHAUC0190 DHADC0205 DHAUC0205 DHADRO0201 DHAURO201 DHADRO0251 DHAURO251 DHADRO0261 DHAURO261 DHADRO0271 DHAURO 71 DHADRO301 DHAURO0301 DHADRO0401 DHAURO401 DHADRO0272 DHAURO 272 DHADR0302 DHAUR0302 DHADR0362 DHAUR0362 DHADR0422 DHAUR0422 DHADR0452 DHAUR0452 DHADRO0512 DHAURO512 DHADR0552 DHAUR0552 DHADRO0602 DHAURO0602 DHADRO0692 DHAURO0692 DHADRO0762 DHAURO0762 INNV DX supply Plug Fan 400V 3Ph N 50Hz Cable type 4X6 mmq T 6mmq 4X6 mmq T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq Centrifugal Fan 400V 3Ph N 50Hz 4X6 mmq T 6mmq 4X6 mmq T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10 T 6mmq 4X10
27. nd or filter obstructed These symptoms may also occur in the presence of an abnormally low pressure Transducer fault Malfunctioning of thermostatic valve Filter dryer clogged Low condensation T Low level of refrigerant The internal thermal protection device has tripped The circuit breakers or line fuses have been tripped by a short circuit One of the high or low pressure switches has tripped The phases have been inverted in the distribution compartment The drain pan hole is closed The siphon is missing The Air flow is too high LENNOX Corrective actions Drain the circuit Check the temperatures upstream and downstream from the valve and filter and replace them if necessary Check the efficiency of the condensation control device optional Warming the bulb with your hand check whether the valve opens and adjust it if necessary If it does not respond replace it Pressure drops upstream and downstream from the filter should not exceed 2 C If they do replace the filter Check the efficiency of the condensation control device where present Check the refrigerant level by measuring the degree of Sub cooling if it is below 2 C replenish the charge In the case of compressors equipped with a protection module check the thermal contact Identify the causes after restarting Pinpoint the cause by measuring the resistance of the individual windings and the insulation from the casing bef
28. nd previous check for local rules Compressors on INNV units only primary brand scroll compressors are installed Scroll compressor represent for CCAC units the best solution in terms of efficiency and reliability The internal compression ratio is very close to the typical operating condition of CCAC giving the maximum in terms of COPs and the perfect balanced pressures at start up gives big advantages to the e motor in terms of reliability mainly in this filed where frequent start up may be possible All motors are thermally protected with an internal sensors chain in case of overload this sensor opens without giving contacts to the connection box Cooling components O O O O O Molecular mesh activated alumina filter dryer Flow indicator with humidity indicator Indications are provided directly on the sight glass Thermostatic valve with external equalization and integrated MOP function High and low pressure switches Schrader valves for checks and or maintenance Electric control board The electric control board is constructed and wired in accordance with Directives 73 23 EEC and 89 336 EEC and related standards The board may be accessed through a door after the main switch has been turned off All the remote controls use 24 V INNOV IOM 0907 E LENNOX signals powered by an insulating transformer situated on the electric control board NOTE the mechanical safety devices such as the high pressure switch are of
29. ng the unit you must strictly follow the rules provided in this manual comply with the directions on the units themselves and take all such precautions as are necessary The fluids under pressure in the cooling circuit and the presence of electrical components may cause hazardous situations during installation and maintenance work All work on the unit must be carried out by qualified personnel only trained to do their job in accordance with current laws and regulations Failure to comply with the rules provided in this manual or any modification made to the unit without prior authorisation will result in the immediate invalidation of the warranty A Warning Before performing any kind of work on the unit make sure it has been disconnected from the power supply Inspection Transport Positioning Inspection on receipt On receiving the unit check that it is perfectly intact the unit left the factory in perfect conditions immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing it HiRef S p A or its agent must be promptly notified of the entity of the damage The Customer must submit a written report describing every significant sign of damage Lifting and Transport While the unit is being unloaded and positioned utmost care must be taken to avoid abrupt or violent manoeuvres The unit must be handled carefully and gently avoid using machine components as anchorages or holds and a
30. ore restoring power Check the microprocessor eliminate the causes Check the phase sequence relay Open the front panels remove the sheet metal just below the e panel Down Flow units and clean it Check for the presence and provide for a new one Reduce the fan speed up to reaching the nominal air flow 35 www lennoxeurope com gt BELGIUM LUXEMBOURG www lennoxbelgium com CZECH REPUBLIC www lennoxczech com FRANCE www lennoxfrance com GERMANY www lennoxdeutschland com NETHERLANDS www lennoxnederland com POLAND www lennoxpolska com PORTUGAL www lennoxportugal com INNOVG IOM 0907 E RUSSIA www lennoxrussia com SLOVAKIA www lennoxdistriobution com SPAIN www lennoxspain com UKRAINE www lennoxukraine com UNITED KINGDOM AND IRELAND www lennoxuk com OTHER COUNTRIES www lennoxdistribution com 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
31. reliability maintenance time pre and after sales support All DX units are available both in single circuit up to 41 2 kW and up to 76 2 kW in double circuit DX Down flow units On Board Microprocessor AN A 4 ES P ectrical Panel Larse sized Air filter ae E I m en ai E Finned coil heat exchanger with hydrofilic fins Steinless steel drain pan E Scroll Compressor Electrical Panel Direct Driven od EC Steinless steel drain pan Scroll Compressor DQ INNOV IOM 0907 E LENNOX CW Down flow units Large sized air filter On Board Microprocessor Finned coil heat exchanger with hydrofilic fins Large sized Air filter Electrical Panel Steinless steel drain pan LAM Electrical Panel Direct Driven od EC centrifugal fans 4 3 way vale Stainless steel drain pan INNOV IOM 0907 E LENNOX Structure INNV units are designed with a self supporting frame and all components are produced using sophisticated computer driven machines and special tools All sheet metals are galvanized and all external panels are powder coated RAL 7016 giving to the units the image and the quality like last generation of IT devices Units are completely closed and only frontal access is requested Anyway it is also possible to have side access in order to reac
32. rous bubbles may indicate that the refrigerant level is low and needs to be topped up The presence of a few bubbles is however allowed especially in the case of high glide ternary mixtures such as HFC R407C Make sure the overheating of the cooling fluid is limited to between 5 and 8 C to this end 1 read the temperature indicated by a contact thermometer placed on the compressor intake pipe 2 read the temperature indicated on the scale of a pressure gauge likewise connected to the intake side refer to the pressure gauge scale for the refrigerant R407C marked with the initials D P Dew Point The degree of overheating is given by the difference between the temperatures thus determined Make sure that the Sub cooling of the cooling fluid is limited to between 3 and 5 C to this end 1 read the temperature indicated by a contact thermometer placed on the condenser outlet pipe 2 read the temperature indicated on the scale of a pressure gauge connected to the liquid inlet at the condenser outlet refer to the pressure gauge scale for the refrigerant R407C marked with the initials B P Bubble Point The degree of Sub cooling is given by the difference between the temperatures thus determined Warning all INNV 2 units are charged with dry nitrogen Any top ups must be made using the same type of refrigerant This operation is to be considered extraordinary maintenance work and must be performed by qualified personnel only AN
33. urrent and local regulations An earth connection is mandatory The installer must connect the earthing wire using the earthing terminal situated on the electric control board yellow and green wire The power supply to the control circuit is taken from the power line through an insulating transformer situated on the electric control board 18 INNOV IOM 0907 E LENNOX The control circuit is protected by suitable fuses or automatic breakers depending on the unit size STARTING UP Preliminary checks Check that the electrical connections have been made properly and that all the terminals are securely tightened This check should also be included in a periodic six month inspection Check that the voltage at the RST terminals is 400 V 5 and make sure the yellow indicator light of the phase sequence relay is on The phase sequence relay is positioned on the electric control board if the sequence is not duly observed it will not enable the machine to start Make sure there no refrigerant leakage that may have been caused by accidental impacts during transport and or installation Check the power supply to the crankcase heater where present A The heating elements must be turned on at least 12 hours before the unit is started They are automatically activated when the main switch is put on Their function is to raise the T of the oil in the sump and limit the quantity of refrigerant dissolved in it To verify whet
34. using special leak detectors Should any leaks be detected during the test empty out the circuit before repairing the leaks with suitable alloys A Do not use oxygen in the place of nitrogen as a test agent since this would cause a risk of explosion Hard Vacuum and Drying of Cooling Circuit To achieve a hard vacuum in the cooling circuit it is necessary to use a pump capable of generating a high degree of vacuum i e 150 of absolute pressure with a capacity of approximately 10 m h If such a pump is available one evacuation will normally suffice to achieve an absolute pressure of 150 Pa If there is no such vacuum pump available or whenever the circuit has remained open for long periods of time you are strongly recommended to adopt the triple evacuation method This method is also recommended when there is a presence of humidity within the circuit The vacuum pump should be connected to the inlets The procedure to be carried out is as follows Evacuate the circuit until you reach an absolute pressure of at least 350 Pa at this point inject nitrogen into the circuit until you reach a relative pressure of about 1 bar Repeat the step described above Carry out the step described above for the third time but in this case attempting to reach the hardest vacuum possible Using this procedure you can easily remove up to 999 of pollutants 30 INNOV IOM 0907 E LENNOX Recharging with refrigerant R407C Connect t
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