User Manual X
Contents
1. 11 AT 11 9 2 Control Card Adjustment 5 11 10 CE Declaration of 12 Symbols Used FLEXIT This product has a number of symbols that are used to label the product itself and in the installation and user documentation Here is an explanation of some of the commonest symbols Extract air EXTRACT AIR Supply air SUPPLY AIR Normi EXCHANGER SUMMER CASSETTE HEATING THERMOSTAT Outdoor air OUTDOOR AIR Exhaust air EXHAUST AIR Symbols for units electric heating 123 Normal speed 123 Normal speed TRANSFORMER TRANSFORMER ADJUSTMENT ADJUSTMENT SUPPLY AIR EXTRACT AIR STAGE 2 STAGE 2 AN DANGER ELECTRICITY N DANGER DO NOT TOUCH 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 FLEXIT 1 Important Safety Instructions To reduce the risk of fire electric shock or injury read all the safety instructions and warning texts before using the 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 Remove the power plug before commencing any service and maintenance wor2. Kitchen hood A model straight out Disconnect the electric quick release contact so that the fan housing is completely released The fan is now accessible from the open side For cleaning see the description in the kitchen hood manual A Lack of cleaning as prescribed will increase the risk of fire in the event of an accident gt 6 Overview Drawings 6 1 Overview Drawing S4 X TT A4 X TT Supply air Extract air Outdoor air Exhaust air a l Right model _ N ES TE 6 2 Overview Drawing S7 X TT A7 X TT Supply air Extract air Outdoor air Exhaust air Right model FLEXIT Item Part no 1 63 extract air filter 2 63 F7 supply air filter 3 Thermoguard 4 Heating adjustment 5 Preheater 6 Heating battery 7 Preheating fire thermostat Reset 8 Heating thermostat Reset 9 Supply air fan 10 Extract air fan 1 S4 TT exchanger cassette cross heat exchanger 12 Control switch 13 Control unit 14 Drainage outlet 15 Connection for kitchen hood only for A model Item Part no 1 G3 extract air filter 2 F7 supply air filter bag 3 Thermoguard 4 Heating adjustment 5 Preheater 6 Heating battery 7 Preheating thermostat Reset 8 Heating fire thermostat Reset 9 Supply air fan 10 Extract air fan 11 S7 TT exchanger cassette cross heat exchanger 12 Control switch 13 Control unit 14 Drainage outlet 15 C
3. Check that the heating switch is activated The filters item nos 1 2 may be clogged by dirt Clean or replace them See under Cleaning Maintenance The grille in the outdoor air cap may be clogged 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 ONE FLEXIT 5 Cleaning Maintenance three minutes to remove hot air remove the power and wait 2 minutes before opening the doors A Before opening the door of the heat recovery system switch off the heat let the fans continue for 5 1 Filters Why change the filters When should the filters be changed the drawing shows the left model the right model is inverted Clean filtered air is essential to ensure that your ventilation system contributes to a healthy indoor environment Therefore the unit is fitted with replaceable filters It is very important to change them when they are dirty Otherwise the system may be damaged 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 Cabinet model filter location gt 3 gt Extract air fit xtract air filter Supply air 5 E L filter with cardboard filter e frame Prefilter and
4. ducts MIN stage MAX stage SP 30 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 6 General Drawings is factory set to 20 C in the unit It is located inside the heating adjustment item 4 page 8 and should not be set to over 25 C It can be 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 This lights when the heating switch is in the ON position Yellow lamp C This lights when the heating is active the element is heating Red lamp Green lamp FLEXIT gt FLEXIT Red Ao en Green O NORMAL Yellow Le vx Ox 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 protec
5. 1 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 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 This is purely a ventilation system and not a Supply air A Supply air Extract air System Drawing Extract air Outdoor air Exhaust air Outdoor SIN Exhaust air Bl SUPPLY AIR TEMPERATURE SENSOR B6 THERMOGUARD FI F2 OVERHEATING THERMOSTATS F20 F21 OVERHEATING THERMOSTATS Fl SUPPLY AIR FILTER FIZ EXTRACT AIR FILTER EBI HEATING ELEMENT EB2 PREHEATING ELEMENT HR X HEAT EXCHANGER CASSETTE MI SUPPLV AIR FA 2 EXTRACT AIR FA P PRESSURE GUARD ACCESSORV The following applies to the A models K KITCHEN HOOD DA4 DAMPER KITCHEN HOOD 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 se
6. ce Exchanger cassette Valves and duct system Outdoor air intake Roof hat Summer operation 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 visible beneath the extract air filter 1 The valves should be cleaned at least once a year The duct system should be cleaned at least every 10 years Check once a year that the grille is not clogged with leaves dust and dirt 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 During the warm part of the year outdoor air temperature over 15 20 there is no need to recover heat The exchanger cassette can be replaced with a summer cassette that is available as an accessory This is pushed into place where the exchanger cassette 11 is located This allows the outdoor air to enter the building directly witho
7. compact filter Thermoguard Exchanger 4 cassette How Fl a Switch off the unit as explained at the top of the page Pull the extract air filter 1 of type G3 flat filter with a cardboard frame coarse filter straight out of the rail Insert a new filter in the same place Pull the supply air filter 2 out of the rail and insert a new filter in the same place The supply air filter is of type S4 a composite filter consisting of a prefilter in the form of a G3 flat filter coarse filter and an F7 compact filter fine filter The filter set must be installed in the following order from the exchanger cassette 11 compact filter prefilter steel grille The supply air filter is of type S7 an F7 bag filter with several long bags beside each other If the filters are not changed regularly the following problems will occur 1 Dirty filters cause increased air resistance and therefore reduce the supply of fresh filtered air to the home 2 Dirty clogged filters reduce the quality of the indoor air 3 Pollen particles that are caught in the filter may over time be released and distributed in the air blown in 4 A poor indoor environment increases the risk of allergy problems 5 Bacterial growth may occur in dirty filters and may be distributed in the air blown in Order nos for a complete set of filters 54 X TT A4 X TT 12318 S7 X TT A4 X TT 12313 FLEXIT O 5 2 Other Maintenan
8. ent The transformer is then visible see picture below 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 S4X S4TT The automatic control compartment is behind the cover at the bottom of the unit Factory setting 150V 170V S7X S7TT The automatic control compartment is always on the right side Factory setting 150V 170V 18 19 20 230 Connection alternatives on the transformer label connection points Transformer 9 2 Control Card Adjustment Options Dipswitch no reduction perature reduction Preheating element is used Preheating element is also Cross excanger unit control card only for frost protection used for heating EH Dipswitch Heating is not affected Heating is switched off with frost protection with frost protection Heating and preheating Heating and preheating fa i function normally are switched off at the min SKD 48 stage SI O 9 fo ye o Sk Not affected with nighttime Temperature is reduced S 5 temperature reduction by 3 C with night time Ob Iu temperature reduction SE 3 Not affected with Fan speed is reduced to nighttime temperature low with nighttime tem Must be this position Bold type sho
9. k e Before you open the door the unit must be dead and the fans must be given time to stop min 2 minutes 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 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 To maintain a good indoor climate comply All descriptions of Flexit S4 and S7 in this manual also apply to the A models except where specified otherwise 2 Functional Description In the heat exchanger cassette HR X 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 airis 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 Heating Elements The heating elements are protected against overheating by overheating thermostats F20 F2
10. nsor rod B6 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 outdoor temperature of approximately 15 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 an outdoor temperature of approximately 8 C The frost protection function operates as follows The preheating element EB2 is activated When this does not produce sufficient frost protection the speed of the supply air fan MI is reduced 3 Operation Control The speed of the fans in the unit is controlled from a separately mounted SP 30 control switch On model S4 this is located at the bottom of the unit Depending on the operating situation the fan speed is set to the desired level Used when not as much ventilation as normal is required NORMAL stage Normal operating ventilation This is the position for daily operation Used when increased ventilation is required in wet rooms or throughout the flat Must be used during and for a while after showering and clothes drying for example to avoid condensation in the
11. onnection for kitchen hood only for A model FLEXIT 7 Technical Data 7 1 Technical data S4 X TT A4 X TT SAX S4XIT ue A 900mm fooomm For A model kitchen hood Dia 125 All descriptions of Flexit S4 and S7 in this manual also apply to the A models except where specified otherwise 7 2 Technical data S7 X TT A7 X TT osx pue AA Rated current total TAA For A model kitchen hood Dia 125 All descriptions of Flexit S4 and S7 in this manual also apply to the A models except where specified otherwise 9 ONES Q FLEXIT 8 Dimensioned Drawings S4 X SAX TT Left 876 KN 5 320 57 57 Left Right All measures in mm FLEXIT Yo 9 Adjusting the Unit Before opening the door of the heat recovery system 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 9 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 compartm
12. s 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 as 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 12 FLEXIT O FLEXIT FLEXIT Flexit AS Televeien 15 N 1870 rje www flexit no
13. tion function has ceased cally be set to the Normal level and active heating when it restarts This means that the heating element will provide heat if needed If there is a power cut the unit will automati 3 1 Operation via a Kitchen Hood A Models 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 to 9 1 as shown in Figure 1 When the timer is activated the air handling unit is forced in addition to the damper function FLEXIT 4 Troubleshooting FAULT DO THE FOLLOWING Check that the power plug is correctly inserted in the power point Check that the fuses in the electrical cabinet are switched on The fire thermostat s item nos 7 8 Chap 6 General Drawings may have been triggered Remove the white plastic cover and press in the white reset button Check that the thermoguard item no 3 is connected If the fans are not working or cannot be adjusted If the supply air feels too cold If the air flow rate has been seriously reduced Check that the heating switch is on and a summer cassette is not loaded The heating thermostat item no 4 can be set to a higher temperature Check that the thermoguard item no 3 is connected The fire thermostat s item nos 7 8 may have been triggered Remove the white plastic cover and press in the white reset button
14. ut 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 must be switched off press the left switch on the control panel so that the green light goes out to avoid the heating element switching on unnecessarily A Remember to reverse this again in the autumn Drainage Fans At the base of the unit there is a condensation water drain 14 that 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 Item nos 9 and 10 The fans normally do not need to be inspected If necessary they can be cleaned with a small brush and compressed air if possible NB Do not use water Disassemble the fans as follows 54 4 X Unscrew 2 screws at the front of each motor One motor can then be pulled out The other is located within a distance piece Pull the fan s carefully out of the track and then disconnect the electric quick release contact so that the fan is completely released 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 S7 X A7 X Unscrew 2 screws at the bottom front of each fan housing The entire fan housing can then be pulled
15. ws the standard factory setting All settings can be combined With the standard settings the unit functions in such a way that heating is available if required with normal operation while heating is switched off with frost protection operation when the preheating element takes over If both elements are required for heating in cold areas during frost protection operation switch 1 must be switched to OFF Please note that the unit s rated power will then increase with the power of the preheating element On the L4 S4 13 A fuses must be used in such cases 11 FLEXIT 10 CE Declaration of Conformity This declaration confirms that the products meet the requirements in the following Council Directives and standards 89 336 EEC Electromagnetic compatibility EMC 73 23 EEC Low voltage Directive LVD EN 60335 1 94 A11 95 A1 96 A1 96 A12 96 EN 50081 1 92 EN 50082 1 92 Manufacturer FLEXIT AS Televeien 15 N 1870 rje Equipment group Ventilation units for installation in ducts Type Falcon VGS400 1998 VGS700 1998 The product is CE marked Shown in the list above FLEXIT AS 02 05 2001 P l J Martinsen General Manager 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 a
16. z x fr ml 94108 06 2005 10 FLEXIT 54 X TT A4 X TT 57 X TT AT User Manual e Air Handling Unit Cabinet Models with Heat Recovery gt Contents 1 Important Safety 5 3 2 Method of Operation System 3 3 5 2 5 54 54524252525 2 5254224 245645 444 4 3 1 Operation via a Kitchen Hood A Models 4 A AA 5 5 Cleaning 6 huge 6 5 2 Other Maintenance coser enn con one a naa nn eer ena nada nca 7 6 Overview Drawings na e ee eee Ure eene 8 6 1 Overview Drawing S4 X TT A4 8 6 2 Overview Drawing S7 7 8 7 Technical Data en ea 9 7 1 Technical Data 54 X TT 4 9 7 2 Technical Data S7 7 9 8 Dimensioned 5 10 9 Adjusting the
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