User Manual
Contents
1. 89 336 EEC Electromagnetic compatibility EMC 73 23 EEC Low voltage Directive LVD EN 60335 1 94 A11 95 A1 96 A13 98 A14 98 A2 00 EN 60335 2 31 97 A1 99 EN 55014 1 93 A1 97 A2 99 EN 61000 3 2 95 A1 98 A2 98 EN 61000 3 3 95 EN 55014 2 97 Producer Equipment group Tvpe The product is CE marked FLEXIT AS Televeien 15 1870 rje Norway Ventilation units for installation in ducts Falcon K3 Cross Falcon Energy K3TT Falcon 3 Cross Falcon Energy S3TT S3R Shown in the article above FLEXIT AS 29 03 2005 P l J Martinsen General Manager 2001 2001 2005 The right to give notice of lack of conformity applies to this product in accordance with the existing terms of sale provided that the product is correctly used and maintained Filters are consumables The symbol on the product or on its packaging indicates that this product may not be treated as household waste Instead it shall be handed over to the applicable collection point for the recycling of electrical and electronic equipment By ensuring this product is disposed of correctly you will help prevent potential negative consequences for the environment and human healthe which could otherwisw be caused by inappropriate waste handeling of this product For more detailed information please contact your local city office your household waste disposal service or the shop where you purchased the product Notice of lack of conformity a2. 13 1 Adjustment The speed of the unit at the normal stage must be set to the voltage specified in the Documentation of Ventilation Data form that is enclosed with the ventilation drawings from the company responsible for project planning Open the door and unscrew and remove the cover of the automatic control compartment The transformer is then visible and the cables marked 1 2 3 as shown on page 2 can be switched over to the specified voltage level Extract air Supply air S3 X A3 X K3 X TT Automatic control compartment On the side where the thermostat is located Factory setting 120 V 120 V S3 R S3 RK Automatic control compartment On the side of the rotary wheel type heat exchanger by the rotor motor Factory setting 120 V 120 V DDODDDDDZ vr 9 9 8 bal Dipswitch 20000000000000000000000000 N N N 2223 24 25 26 27 NC 29 30 NC LV L Dev FV NON N D N N N N O Fig IO Cross unit control card 13 2 Control Card Adjustment Options Flexit S3 X K3 X A3 X TT Flexit S3 R S3 RK Dipswitch no Heating is not Heating is switched off Not used Not used affected with frost with frost protection protection Heating and preheat Heating and Must be in this posi Not used ing function normally preheating are tion Switched off at the min Not affected with Temperature is Not affected with Temperature is reduced by nighttime temperature reduced by 3 C with nighttime tempera 3 C with n
3. FAN M2 EXTRACT AIR FAN PI PRESSURE GUARD ACCESSORV ONLY FOR MODELS WITH A KITCHEN HOOD K KITCHEN HOOD DAA DAMPER KITCHEN HOOD 2 3 Frost Protection The unit is fitted with a special thermoguard for maximum utilisation of the heat recovery function and maintenance of balanced ventilation The thermoguard has a B6 sensor rod with a dual function This is located in the exchanger cassette s extract air duct and has an NTC element to check the temperature and an indicator to register condensation water If the extract air is dry the thermoguard will ensure that the unit works normally down to an exhaust air temperature of 3 C At lower temperatures it will produce an impulse to activate the frost protection function This function will be repeated periodically until the exchanger cassette s temperature is sufficient to prevent freezing If the extract air is damp this function will start at a temperature of 1 C in the exhaust air The frost protection function itself has the following sequence The preheating element EB2 is activated If this is not sufficient the extract air fan will switch to NORMAL speed and the supply air fan will be reduced to LOW speed When there is no longer a need for frost protection the unit will return to normal mode 3 Operation Control The speed of the fans in the unit is controlled from a separatelv mounted SP 30 control switch De pending on the operating situat
4. and is located at the bottom in the compartment right above the heating element See the label RESET This is a ventilation system only and not a heating system The home must be heated in the normal manner The heat gained from heat recovery must be seen in comparison to a situa tion where the extract air is blown right out of the home without recovery FLEXIT 9 Operation Control The speed of the fans in the unit is A controlled from a separatelv mounted SP 30 control switch Depending on the min operating situation the fan speed is set N Sn to the desired level Vellow mx MIN stage Used when not as much ventila OO OA tion as normal is required NORMAL stage Normal operating ventilation This is the position for daily op eration MAX stage Used when increased ventila tion is required in wet rooms If there is a power cut the unit will auto or throughout the flat Must be matically be set to the speed stage Normal and rotor active when it restarts i e the used during and for a while after N N rotor will operate if heat is required showering and clothes drving for example to avoid condensation in the ducts 9 1 Operation via a Kitchen Hood Figure 1 A Knob for damper timer B Pushbutton for light SP30 Control Switch for Electronic Automatic Control with a Thermoguard This contains the following functions Right pressure switch fan symbol to choose between min normal and
5. is in the ON position Yellow lamp C This lights when the heating is active the element is heating Red lamp FLEXIT lt gt FLEXIT Red Ae e Green O o O NORMAL Yellow l e max OO OA If the unit is in temporary automatic frost protection mode in the winter the unit will not react to a change in speed before the frost protection function has ceased If there is a power cut the unit will auto A matically be set to the speed stage Normal and active heating when it restarts This means that the heating element will heat if there is a need for heating 3 1 Operation via a Kitchen Hood A3 and K3 Figure 1 A Knob for damper timer B Pushbutton for light Open the damper when preparing food The damper closes automatically after a maximum of 60 minutes or if you turn the damper knob tol as shown in Figure 1 When the timer is activated the air handling unit is forced in addition to the damper function Fig I FLEXIT oO O 4 Cleaning Maintenance S3 X K3 X A3 X TT kitchen hood switch off the heat let the fans continue for three minutes to remove hot air A Before opening the door of the heat recovery system or carrying out maintenance on the remove the power from the unit and wait 2 minutes before opening the doors Fans Filters A Item nos 9 and 10 Chap 5 General Drawing A3 X K3 X A3 X TT The fans normally do not need to be inspected If necessary they can be rem
6. 3 2 Control Card Adjustment Options mme 13 14 Troubleshooting 7 141tnm lt nnmmmmnm a 14 15 CE Declaration of Conformity mm 15 Symbols Used This product has a number of symbols that are used to label the product itself and in the installation and user docu mentation Here is an explanation of some of the commonest symbols a uu A HIGH VOLTAGE 10 20 MP DANGER DO NOT tat L N TOUCH Supply air Extract air ve EXCHANGER SUMIER HEATING THERMOSTAT Exhaust air Outdoor air EXHAUST AIR OUTDOOR AIR Symbols for units electric heating 00 i CAUTION When a text bears this symbol it means that personal injury or serious damage to the eguipment may follow if the instructions are not followed l 2 3 l 2 2 A NB When qa text hears this symhol damage to equipment or a poor Normal speed Normal speed HH H H FTA O AN PRIER utilisation ratio may be the consequence of not following the ADJUSTMENT ADJUSTMENT instructions SUPPLY AIR STAGE 2 EXTRACT AIR STAGE 2 Our products are subject to continuous development and we therefore reserve the right to make changes We also disclaim liability for any printing errors that may occur 2 FLEXIT 1 Important Safety Instructions S3 X K3 X A3 X TT To reduce therisk of fire electric shock or injury read all the safety instructions and warning texts before using the unit e This unitis only designed to handle ventilation air in buildings e It must not be used to ext
7. 94233E 04 2006 01 FLEXIT S3 X TT K3 X TT A3 X TT S3 R 3 RK User Manual Air Handling Unit Kitchen Model S3 X TT Air handling unit with cross heat exchangeror TT exchanger K3 X TT Air handling unit with cross heat exchangeror TT exchanger and kitchen hood A3 X TT Air handling unit with cross heat exchanger or TT exchanger and connection for external kitchen hood SIR Air handling unit with rotating exchanger S3RK Air handling unit with rotating exchanger and kitchen hood OBB L FLEXIT Contents 1 Important Safety Instructions S3 X K3 X A3XITT cote 3 2 Functional Description oii 3 2 1 Heating Elements mms 3 2 3 FrostProtection aan 3 2 2 System Drawing S3 X K3X A3XITT mm 3 3 Operation Control eeu 4 3 1 Operation via a Kitchen Hod ii 4 4 Cleaning Maintenance S3 X K3 X A3X TT nn 5 S General Drawing S3 X K3 X A3XITT mm 7 6 Technical Data S3 X A3 X K3 KITT llgLelLe le OeL L a 7 6 1 Technical Data Kitchen Hood o als 7 T Important Safety Instructions S3 S3 RK lt 8 8 Functional Description eis 8 8 1 Heating Elements iii 8 8 2 System Drawing S3 R S3 RK 8 9 Operation Control mm 9 9 1 Operation via a Kitchen Hod cities 9 10 Cleaning Maintenance S3R S3RK mm 10 11 General Drawing S3 R A3 R S3 RK cvs 12 12 Technical Data S3 R A3R S3RK mm 12 12 1 Technical Data Kitchen Hod cust 12 13 Adjusting the Unit ccs 13 13 1 Adjustment LlJ 13 1
8. eaned internally a few times a year Wipe it internally with a damp cloth and detergent Replace the filter cassette and press it up so that it is fixed in the snap locks The risk of fire increases if the volume hood is not cleaned as often as specified To change the fluorescent tube remove the lamp glass by pressing the snap locks in the direction of the arrow Fig 4 The fluorescent tube can now be accessed for replacement Fluorescent tube base G23 FLEXIT 5 General Drawing 3 X K3 X A3 X TT Supply air Extract air Outdoor air Exhaust air Item Part no 1 G3 extract air filter G3 F7 supply air filter Thermoguard Heating adjustment Heating element Preheating element Preheating overheating thermostat Reset Heating overheating thermostat Reset Supply air fan 10 Extract air fan 11 X IT cross heat exchanger cassette 12 Control unit 13 Kitchen hood A and K models J OU A W DO CO 6 Technical Data S3 X A3 X K3 X TT Fig 5 Unit seen from above air flow direction S3XK3X SIRBI _ Fuse MOA fa gt Rated power total 1530 W 1530 W Weight og 4409 gt Duct connection Height Width Depth 6 1 Kitchen Hood Technical Data Width See separate drawing 230 V earthed Fluorescent tube base G23 11 W 7 Important Safety Instructions S3 R S3 RK To reduce the risk of fire electric shock or A injury read all the safety instructions and warning texts before using t
9. ed S3 X K3 X A3 X TT e Check that the heating switch 4 is in position 1 and a summer cassette is not loaded e The heating thermostat item no 4 can be set to a higher temperature e The overheating thermostats item nos 7 8 Chap 5 may have been triggered Remove the white plastic cover and press in the white reset button e Check that the unit s thermoguard item no 3 is connected e Check that the unit s temperature sensor B1 is connected e Ducts in cold lofts may need additional insulation S3 R S3 RK e Check that the heating switch 4 is in position 1 e The heating thermostat item no 4 can be set to a higher temperature e The overheating thermostat item no 5 Chap 11 may have been triggered Remove the white plastic cover and press in the white reset button e Check that the unit s temperature sensor B1 is connected e Ducts in cold lofts may need additional insulation S3 X K3 X A3 X TT AND S3 R S3 RK e The filters item nos 1 2 may be clogged by dirt Clean or replace them See under Cleaning Maintenance e Fan wheels need cleaning See under Cleaning Maintenance If none of this helps please contact your supplier for service Please state the serial number on the rating plate inside the unit open the door FLEXIT 15 CE Declaration of Conformitv This declaration confirms that the products meet the requirements in the following Council Directives and standards
10. gap at the bottom is not clogged with leaves This applies oniv if the svstem has a roof hat During the warm part of the vear outside the heating season there is no need to recover heat The exchanger cassette can be replaced with a summer cassette that is available as an accessorv This is pushed into place where the exchanger cassette 11 is located This allows the outdoor air to enter the building directly without heat recovery taking place The thermoguard 3 must then be transferred to the summer cassette Its location is shown on the label NB At the same time the heating 4 must be switched off bv turning the potentiometer anticlockwise to avoid the heating element switching on unnecessarily Remember to reverse this again in the autumn At the base of the unit there is a condensation water drain that passes through the rear of the kitchen hood and conducts condensation water to the waste water drain It is important that this drain is always open in good condition and well insulated where it is exposed to frost It is recommended that you keep an eye on the drainage system to avoid any leaks occurring must be cleaned roughly twice a month with normal use Loosen the filter cassette by pressing in the snap locks at the front Fig 3 Lower the filter and release the filter cloth and filter basket in warm water with detergent The filter cassette with the filter can also be washed in a dishwasher The volume hood should be cl
11. he unit e This unit is only designed to handle ventilation air in buildings e It must not be used to extract combustible or flammable gases e Remove the power plug before commencing any service and maintenance work e Before you open the door the unit must be dead and the fans must be given time to stop min 2 minutes e The unit contains heating elements that must not be touched when they are hot The unit must not be operated without the filters being in place Follow the user manual precisely with regulations and avoid condensation damage the unit must never be stopped apart from during service maintenance or in connection with an accident FOR CEILING MOUNTED UNITS Be care A ful with the doors when opening the unit They open suddenly when the last screw is removed Take care as well when removing components Hold them when you remove the last screw to avoid objects falling down The rotor requires extra care on account of its weight To maintain a good indoor climate comply 8 Functional Description In the HR R rotor the cold outdoor air and the warm extract air pass each other without being mixed With this principle around 75 80 of the heat in the extract air will be transferred to the supply air In addition a thermostat controlled heating element EBI will ensure that the supply air has the desired temperature when the temperature outside is verv low This supplv air is passed via ducts and valves to liv
12. ight time tem reduction nighttime temperature ture reduction with nighttime low with nighttime tem Nighttime temperature to low with nighttime temperature perature reduction reduction temperature reduction Preheating element Preheating element is Heating not available Heating available is used only for frost also used for heating protection Must be in this position Not used Not affected Fan speed is reduced to Not affected with Fan speed is reduced Bold type shows the standard factory setting All settings can be combined 13 14 Troubleshooting FLEXIT FAULT DO THE FOLLOWING If the fans arenot working or cannot be adjusted If the supplv air feels too cold If the air flow rate has been seriouslv reduced S3 X K3 X A3 X TT e Check that the power plug is correctiv inserted in the power point e Check that the fuses in the electrical cabinet are switched on e Theoverheating thermostats item nos 7 8 Chap 5 mav have been triggered Remove the white plastic cover and press in the white reset button e Check that the thermoguard item no 3 is connected S3 R S3 RK e Check that the power plug is correctiv inserted in the power point e Check that the fuses in the electrical cabinet are switched on e The overheating thermostat item no 5 Chap 11 may have been triggered Remove the white plastic cover and press in the white reset button e Check that the thermoguard item no 3 is connect
13. ing rooms and bedrooms The extract air is extracted either from the same room or via door gaps overflow gratings to toilets and wet rooms The used air is passed via a duct system back to the unit emits heat as stated above and is blown out of the building via a roof hat or wall grating The temperature of the supply air is controlled by the rotor Only when this is not able to maintain the set temperature will the heating element start up When there is no need for heating summer the rotor will stop FLEXIT 8 2 System Drawing S3 R S3 RK Extract air Supply air Outdoorair Exhaust air e AD Extract air Supply air Outdoor air Exhaust air na A MA 0 Em EOP BI SUPPLV AIR TEMPERATURE SENSOR EBI HEATING ELEMENT FIO OVERHEATING THERMOSTAT MANUAL RESET F20 OVERHEATING THERMOSTAT AUTOMATIC RESET FI SUPPLY AIR FILTER Fl2 EXTRACT AIR FILTER MI SUPPLV AIR FAN M2 EXTRACT AIR FAN HR R ROTAR HEAT EXCHANGER M4 ROTOR MOTOR ONLY FOR MODELS WITH A KITCHEN HOOD K KITCHEN HOOD DA4 DAMPER KITCHEN HOOD 8 1 Heating Elements The heating elements are protected against overheating by the overheating thermostat F20 which switches off at 65 C As an additional safety measure the overheating thermostat F10 switches off at 80 C The overheating thermostat can be reset manually by removing the white plastic cover and pressing the reset button The thermostat is accessible by opening the doors
14. ion the fan speed is set to the desired level Used when not as much ventila tion as normal is required NORMAL stage Normal operating ventilation This is the position for dailv op eration Used when increased ventila tion is required in wet rooms or throughout the flat Must be used during and for a while after showering and clothes drving for example to avoid condensation in the ducts MIN stage MAX stage SP30 Control Switch for Electronic Automatic Control with a Thermoguard This contains the following functions Right pressure switch fan symbol to choose between min normal and max speeds with an indicator lamp to show which speed stage is active Left pressure switch symbol to choose heating OFF ON This switch is used to switch heating off on disconnected during the warm part of the year The heating thermostat item 4 Chap 5 General Drawings is factory set to 20 C in the unit This is located inside the unit and should not be set to over 25 C It is adjusted with a flat screwdriver The sensor for the thermostat is located in the supply air duct Some heat loss up to the valves must be expected where ducts pass through a cold environment Slow flash Filter must be replaced provided that a pressure guard is installed Fast flash Overheating thermostat triggered or thermoguard not connected Permanently on Both errors Green lamp This lights when the heating switch
15. max speeds with an indicator lamp to show which speed stage is active Left pressure switch symbol to choose heating OFF ON This switch is used to switch the rotor and heating element off on disconnected during the warm part of the year Temperature adjustment item no 3 Chap 11 is factory set to 20 C in the unit and should not be set to over 25 C It is adjusted with a flat screwdriver The temperature sensor is located in the supply air duct Some heat loss up to the valves must be expected where ducts pass through a cold environment Open the damper when preparing food The damper closes automatically after a maximum of 60 minutes or if you turn the damper knob tol as shown in Figure 6 When the timer is activated the air handling unit is forced in addition to the damper function Red lamp Slow flash Filter must be replaced provided that a pressure guard is installed Fast flash Overheating thermostat triggered Fig 6 Permanently on Both errors Green lamp This lights up when the rotor and heating are activated Yellow lamp C This lights up when the rotor is in operation the rotor stops when heat is not required FLEXIT 10 Cleaning Maintenance S3 R S3 RK Before opening the door of the heat recovery system or carrying out maintenance on the A kitchen hood switch off the heat let the fans continue for three minutes to remove hot air remove the power from the
16. od should be cleaned internally a few times a year Wipe it internallv with a damp cloth and detergent Replace the filter cassette and press it up so that it is fixed in the snap locks The risk of fire increases if the volume hood is not cleaned as often as specified To change the fluorescent tube remove the lamp glass bv pressing the snap locks in the direction of the arrow Fig 9 The fluorescent tube can now be accessed for replacement Fluorescent tube base G23 Fig 9 11 General Drawing 3 R A3 R S3 RK Exhaust air Outdoor air Supply air Extract air 00086 12 Technical Data S3 R A3 R S3 RK Fuse MOA eC Fuse Rated preheatingpower fJ Cs 12 1 Kitchen Hood Technical Data See separate drawing FLEXIT Item Part no F7 extract air filter F7 supply air filter Heating adjustment Heating element Heating overheating thermostat Reset Supply air fan Extract air fan Rotary wheel type heat exchanger Rotor motor Control unit Kitchen hood A and K models O OO J oa UI WU FN Oo Kitchen A q Outdoor air KI O I Unit seen from above air flow direction FLEXIT 13 Adjusting the Unit A Before opening the door of the heat recovery system or carrying out maintenance on the kitchen hood switch off the heat let the fans continue for three minutes to remove hot air remove the power from the unit and wait 2 minutes before opening the doors
17. oved as follows Unscrew and remove the cover over the fan 4 screws and disconnect the electrical contact The fan can then be carefully pulled out of the track The motor and fan blades are removed by unscrewing the 4 screws in the round motor plate and carefully pulling the motor out of the motor housing If cleaning is reguired use a small brush and compressed air if possible Mounting takes place in the reverse order To preserve a healthy indoor environment it is important to change filters when they are dirty Dirty filters lead to Increased air resistance in the filter less air in the home therisk of bacterial growth in the filter in the worst case scenario the system can be damaged How often the filters need to be changed depends on the degree of contamination of the air where they are installed In general the filters need to be changed once a year preferably in the autumn after the pollen season In areas with a lot of dust and contamination the filters should be changed in the spring and autumn The supply air filter that cleans the outdoor air 2 consists of a prefilter G3 coarse filter and a compact filter F77 fine filter Fig 2 Remember the seguence from above steel grille prefilter compact filter The filters are pushed in place in the fixing rails The extract air filter 1 is a G3 panel filter coarse filter and is located on a separate rail It is recommended that you order a filter subscrip
18. ract combustible or flammable gases e Remove the power plug before commencing any service and maintenance work e Before you open the door the unit must be dead and the fans must be given time to stop min 2 minutes e The unit contains heating elements that must not be touched when they are hot e The unit must not be operated without the filters being in place e Do not cook any combustible substances or flame anything under the fan e Do not leave a saucepan or frying pan containing oil or grease unsupervised e Follow the user manual precisely To maintain a good indoor climate comply A with regulations and avoid condensation damage the unit must never be stopped apart from during service maintenance or in con nection with an accident 2 Functional Description In the HR X heat exchanger cassette the cold outdoor air and the warm extract air cross each other without coming into direct contact with each other With this principle 60 70 of the heat in the extract air will be transferred to the supply air In addition a thermostat controlled heating element EB1 will ensure that the supply air has the desired temperature This supply air is passed via ducts and valves to living rooms and bedrooms The extract air is extracted either from the same room or via door gaps overflow gratings to toilets and wet rooms The used air is passed via a duct system back to the unit emits heat as stated above and is blown o
19. s a result of incorrect or defective installation must be submitted to the installation company responsible The right to give notice of lack of conformity may lapse if the system is used incorrectly or maintenance is grossly neglected 15 Flexit AS Televeien 15 N 1870 rje www flexit no
20. t model the right model is inverted Extract air filter Supply air filter Compact filter Compact filter Rotor Rotor The rotor 8 should be checked roughly once a year for dust and dirt in the air ducts If there are signs of clogging contact your supplier for service Valves and duct system Clean the valves at least once a year The duct system must be cleaned at least every 10 years Outdoor air intake Check once a year that the grille is not clogged Roof hat Check once a year that the drainage gap at the bottom is not clogged with leaves This applies only if the system has a roof hat FLEXIT Summer operation Kitchen hood oniv A K models Wipe the volume hood with a damp cloth and detergent The A o During the warm part of the vear outside the heating season there is no need to recover heat Then you can press the switch on the control switch so that the green lamp goes out This avoids heat recoverv on cool nights and the house is not heated up so quickiv in the davtime When there is again a need for heat recovery press the switch so that the green lamp lights up again filter must be cleaned roughiv twice a month with normal use Loosen the filter cassette bv pressing in the snap locks at the front Fig 8 Lower the filter and release the filter cloth and filter basket in warm water with detergent The filter cassette with the filter can also be washed in a dishwasher The volume ho
21. tion to ensure full benefit from the system and the cheapest prices Order no for a complete set of filters 12322 Filter location the drawing shows the left model the right model is inverted Supply air filter Prefilter and compact filter Exchanger cassette Exchanger cassette Extract arr filter Flat filter with cardboard frame Thermoguard Should be checked roughly once a year for dust and dirt in the air ducts First remove the thermoguard 3 and carefully pull the cassette 11 out If cleaning is required place it in a bowl with warm soapy water NB not soda and finally flush it through with warm water Clean the thermoguard separately with a dry cloth When removing installing the exchanger cassette it is important to ensure that both the cassette and the sensor rod are located correctly and that the cable plug is inserted in the contact The thermoguard must be located 6 cm from the top of the exchanger cassette and in the centre of the exchanger cassette Place it in the area beneath the extract air filter 1 Valves and duct svstem Qutdoor air intake Roof hat Summer operation A Drainage Kitchen hood oniv A K models Wipe the volume hood with a damp cloth and detergent The filter FLEXIT Clean the valves at least once a vear The duct svstem must be cleaned at least everv 10 vears Check once a vear that the grille is not clogged Check once a vear that the drainage
22. unit and wait 2 minutes before opening the doors Fans Item nos 6 and 7 Chap 11 General Drawing The fans normally do not need to be inspected If necessary the fan blades can be cleaned with a small brush and compressed air if possible NB Do not use water Dismantle the fan as follows Open the doors as instructed Pull out the electric quick release contact for the motor Unscrew 2 screws at the front of the motor s mounting plate The fan can then be pulled carefully down and out of the unit Filters To preserve a healthy indoor environment it is important to change filters when they are dirty Dirty filters lead to A Increased air resistance in the filter less air in the home the risk of bacterial growth in the filter in the worst case scenario the system can be damaged How often the filters need to be changed depends on the degree of contamination of the air where they are installed In general the filters need to be changed once a year preferably in the autumn after the pollen season In areas with a lot of dust and contamination the filters should be changed in the spring and autumn The supply air filter and extract air filter 2 and 1 consist of a compact filter F7 These are pushed into place It is recommended that you order a filter subscription to ensure full benefit from the system and the cheapest prices Order no for a complete set of filters 12328 Filter location Fig 7 the drawing shows the lef
23. ut of the building via a roof hat or wall grating The extract air from the kitchen hood K does not pass through the heat exchanger cassette 2 1 Heating Elements The heating elements are protected against overheating by overheating thermostats F20 F21 which switch off at 65 C As an additional safety measure overheating thermostats F10 F11 switch off at 80 C The overheating thermostats can be reset manually by pressing the white button They are located at the front on the top of the unit They are accessible by opening the doors and removing the plastic cover that covers the access opening See the label The reset button is located on the innermost panel a little way inside the opening This is purely a ventilation system and not a heating system The home must be heated in the normal manner The heat gained from heat recovery must be seen in relation to a situation in which the extract air is blown right out of the home without recovery o 2 2 System Drawing S3 X K3 X A3 X TT Supply air Extract air Outdoor air Exhaust air Supply air Extract air Outdoor air Exhaust air Y TA B1 EB1 EB2 O Ham _ F20 GJE at AM An BI SUPPLV AIR TEMPERATURE SENSOR Bb THERMOGUARD F10 F11 OVERHEATING THERMOSTAT MANUAL RESET F20 F21 OVERHEATING THERMOSTAT AUTOMATIC RESET FI SUPPLY AIR FILTER Fl2 EXTRACT AIR FILTER EBI HEATING ELEMENT EB2 PREHEATING ELEMENT ELECTRICAL HR X CROSS HEAT EXCHANGER MI SUPPLV AIR
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