User`s manual "VENTS VUT 2000
Contents
1. VUT 2000 PW EC VUT 3000 PW EC Heat recovery air handling unit www ventilation system com bo uu CONTENTS Safety requirements 3 Introduction 5 Purpose 5 Delivery set 5 Designation key 5 Technical data 6 Unit design and operating logic 8 Mounting and set up 9 Connection to power mains 13 Functional diagram 14 Technical maintenance 15 Fault handling 17 Storage and transportation rules 17 Manufacturer s warranty 18 Acceptance certificate 19 Seller information 19 Mounting certificate 19 Warranty card 20 SAFETY REQUIREMENTS Read the user s manual carefully prior to the operation and installation of the heat recovery air handling unit Fulfil the user s manual requirements as well as the provisions of all the applicable local and national construction electrical and technical norms and standards The warnings contained in the user s manual must be considered most seriously since they contain vital personal safety information e Failure to follow the rules and safety precautions noted in this user s manual may result in an injury or unit damage After a careful reading of the manual keep it for the entire service life of the unit e While transferring the unit control the User s manual must be turned over to the receiving operator Symbol legend AN DO NOT UNIT MOUNTING SAFETY PRECAUTIONS Disconnect the unit from power mains prior to i The unit must be grounded any inst2. D UNIT TECHNICAL DATA 2 items x 420 2 items x 990 oa T o 8 2400 up to 75 PERFORMANCE CHARTS FOR THE WATER HEATER PARAMETERS OF THE UNIT In order to attain maximum power the water heater should be counterflow connected In case of the direct flow connection the water heater has lower power but higher frost resistant properties Air temperature after heater C 15 20 25 30 35 40 45 50 55 60 65 VUT 2000 PW EC Coil heating capacity kW 10 15 20 25 30 35 40 45 50 A 3518 A g 309 5 a 25 g A 2 1 eis S y s s 20 8 DI S x z x 6 2 _p__ 185 10 q A as 5 D Al od i lier i 2 10 Rae 15 20 25 30 A 35 5 1 4 8 2 25 3 3 5 4 45 5 24 Air speed inside the coil m s 205 6 a Q Q Q o o o Q o ozo o Q Q i Q Q Q x 88 2 8 8 8 8 8 8 888 282 828 8 2 amp Se Se re e s e gt A N N 42 g Air flow through the coil m h T wj 8 F 5 45 How to use water heater diagrams y System Parameters Air flow 1450 m h Outside air temperature 25 C Water temperature in out 70 50 C 0 2 0 3 0 4 0 5 0 6 E Air Speed Starting from 1450 m3 h
3. 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 power mains using durable insulated Lin pel 1 2 ate nc n LIN Ll c Inc c noxia B A E andl out and heat resistant conductors cables and wires with minimum cross section D 7141 4 TF 7777 12V Gnd B A E Gnd Out Power input 230V AC non 2 Ng lt ms 2 z lt a z S Cooler no contact aN Pi TE1 ELECTRIC SHOCK HAZARD The VUT 2000 3000 PW EC air EXTERNAL WIRING DIAGRAM FOR THE UNIT VUT 3000 PW EC handling unit is rated for connection X1 to three phase AC 400 V 50 Hz power mains The unit must be connected to M IL1IL2 L3 N PE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 power mains using durable insulated LI N pel1 2 3 c nc NILINIL Incl c nofsoavlend B A E Gnd out and heat resistant conductors cables and wires with minimum cross A S a i oy OP 7 section not less than 2 5 mm L
4. The warranty repair does not include routine maintenance unitinstallation dismantling unit setup To benefit from warranty repair the user must provide the unit the user s manual with stamped sale date and the payment document certifying the purchase The unit model must comply with the one stated in the user s manual Contact the Seller for warranty service The manufacturer s warranty does not apply to the following cases e user sfailure to provide the unit with the entire delivery package as stated in the user s manual or with missing component parts previously dismounted by the user e mismatch of the unit model and mark with the respective details stated on the unit packing and in the user s manual e user s failure to ensure timely technical maintenance of the unit e external damage to the casing excluding external modifications of the unit as required for its installation and the internal components of the unit alteration of the unit design or engineering changes of the unit replacement and use of the unit assemblies parts and components not approved by the manufacturer unit misuse user s violation of the unit installation regulations user s violation of the unit management regulations e unit connection to power mains with a voltage different from the one stated in the user s manual e unit breakdown due to voltage surges in the power mains e user s discretionary repair of the unit e unit repa
5. Disconnect the unit from power mains prior to maintenance Do not damage the power cable while operating the unit Do not put foreign objects on the power cable Do not open the operating unit In case of continuous operation of the unit periodically check the security of mounting Do not let air flow from the unit be directed to the open flame devices or candles INTRODUCTION The user s manual consisting of the technical details operating instructions and technical specification applies to the installation and mounting of the heat recovery air handling unit VENTS VUT 2000 3000 PW EC hereinafter referred to as the unit PURPOSE The unit with a heat exchanger and a water heater is designed to save heat energy by means of heat recovery and is one of the energy saving components used in the buildings and premises The unit is a component part and is not designed for independent operation The unit is designed to provide permanent controlled air exchange by means of mechanical ventilation in houses offices hotels caf s meeting halls and other mechanically ventilated premises as well as utilization of extract air heat energy to warm up supply purified air The unit is designed for suspended mounting The unit is rated for continuous operation Transported air must not contain any flammable or explosive mixtures evaporation of chemicals sticky substances fibrous materials coarse dust soot and oil particles or environments f
6. distance from the service panel to the floor 1000 mm 1300 mm UNIT MOUNTING The unit must be suspended to the ceiling on the threaded rod that is fixed inside a dowel Example Vibration damping rubber Nut and Tock nut To attain the best performance of the unit and to minimise turbulence induced air pressure losses connect a straight air duct section on both sides of the unit while mounting Minimum straight air duct length e equal to 1 air duct diameter on intake side e equal to 3 air duct diameters on outlet side If the air ducts are too short or not connected protect the unit parts from ingress of foreign objects e g by covering the spigots with a protecting grille or other protecting device with mesh width not more than 12 5 mm to prevent uncontrollable access to the fans www ventilation system com o __ p es Safety precautions The unit must be mounted to a rigid and stable structure The unit must be suspended using threaded rods Before starting mounting check that the mounting structure has sufficient loading capacity for the unit weight Otherwise reinforce the mounting location with beams or similar elements If the threaded rods used for the unit mounting are too short the unit can generate abnormal noise resulting from resonance with the ceiling Use threaded rods of sufficient length to prevent resonance If the abnormal noise is generated at the spiral air duct joint replace the spiral air
7. on the air flow scale draw a vertical line till the air speed axis which makes about 3 2 m s Waterflow through the esi Is m Supply air temperature prolong the line up to the point where it crosses the outside air temperature blue curve e g 25 C then draw a horizontal line from this point to the left till crossing water in out temperature curve e g 70 50 C From this point draw a vertical line to the supply air temperature axis on top of the graphic 28 C m Heating coil capacity Prolong the line up to the point where it crosses the outside air temperature e g 25 C red curve and draw a horizontal line from this point to the right until it crosses water in out temperature curve e g 70 50 C from here draw a vertical line up to the scale representing the heating coil capacity 31 0 kW m Water flow Prolong the line down to water flow axis at the bottom of the graphic 038 l s m Water pressure drop Draw the line from the point where the line crosses the black curve to the pressure drop axis 9 8 kPa Air temperature after heater C VUT 3000 PW EC Coil heating capacity k 5 10 15 20 25 30 35 40 45
8. or damage the insulation or connection tightness are not allowed in the storage environment Use hoist machinery for handling and transportation to prevent possible mechanical damages of the unit Fulfil the requirements for transportation of the specified cargo type Use any vehicle types for the unit transportation provided that it is protected against mechanical or weather damage Avoid any mechanical shocks and strokes during handling operations Turn the unit off Contact the Seller Low air flow Clean or replace the ventilation system components air ducts diffusers louvre shutters grilles The drainage system is soiled damaged or Weier lekage arranged not correctly www ventilation system com IIA MANUFACTURER S WARRANTY The manufacturer hereby warrants normal operation of the unit over the period of 24 months from the retail sale date provided the user s observance of the transportation storage installation and operation regulations Should any malfunctions occur during the unit operation due to manufacturer s fault during the warranty period the user is entitled to elimination of faults by means of warranty repair performed by the manufacturer The warranty repair includes work specific to elimination of faults in the unit operation to ensure its intended use by the user within the warranty period The faults are eliminated by means of replacement or repair of the complete unit or the faulty part thereof
9. 50 55 10 20 30 40 50 60 A 5 A 35 5 2 S 2 Ss 9 a 25 S Sey amp IM J R 207 5 e A7 YIMA S 4 15 10 1 aa 4 p 5 y ei i aa 4 ss E p10 15 _ Ie r 1 25 _ 7 30 35 1 1 5 2 2 5 3 3 5 4 45 5 Air speed inside the coil m s 42 8 e o o 2o o 2 o z o 2 o 2 2 230 10 Ss O S S i S So 230 amp oO A Ni S A gy Eg SF N N N N N a Y A M 8 e Air flow through the coil m h 7 6 D 5 48 a 2 Y z 0 1 0 2 0 3 0 4 0 5 0 6 0 7 How to use water heater diagrams Water flow through the coil V s System Parameters Air flow 3500 m h Outside air temperature 10 C Water temperature in out 90 70 C Air Speed Starting from 3500 m h on the air flow scale draw a vertical line till the air speed axis which makes about 4 65 m s m Supply air temperature prolong the line up to the point where it crosses the outside air temperature blue curve e g 10 C then draw a horizontal line from this point to the left till crossing water in out temperature curve e g 90 70 C From this point draw a vertical line tothe supply air temperature axis on top of the graphic 22 5 C m Heating coil capacity Prolong the line up to the point where it crosses the outside air temperature e g 10 C red curve and draw a horizontal line from this point to the right until it crosses water in out temperature cur
10. NJPE 1 2 3 112 1 2 1 2 1 2 a HAM BTA E Gnd Out ajy si c N N L N L 7 Q T gt 2g D S fog SM4 a smi 5M2 eS ojt M4 DD1 PKI Pi TE1 A ELECTRIC SHOCK HAZARD Design Model Wie DX cooler NO 2xoz5mm DD Pump dry run protection relay Circulation pump of the heater Supply air damper actuator Extract air damper actuator PKI Contactfromfirealarm panel nO 2x075mm Pi Controlpan 4x 0 75 mm TE1 Outdoor air temperature sensor 3x 0 75 mm 1 The unit delivery set includes P1 and TE1 only 2 Max connecting cable length is 20 m The above cross section is for reference only The applicable cable cross section must be selected depending on the wire type its maximum temperature and insulation the maximum current the wire length and its installation method Use copper wires only Connect the unit to power mains through the terminal block located in the terminal box on the side panel of the unit in compliance with the wiring diagram and terminal marking Connect all the control and supply cables in compliance with the terminal marking and polarity Connect the unit to power mains through the external automatic circuit breaker with a magnetic trip integrated into the fixed wiring system The trip current must be in compliance with current consumption www ventilation system com FUNCTIONAL DIAGRAM Out
11. allation or repair operations The unit must not be operated outside the temperature range stated in the user s manual and in aggressive or explosive environments Do not use damaged equipment or cables when connecting the unit to power mains While installing the unit follow the safety A f npack the unit with care regulations specific to the use of electric tools Ynpacrthg ca Do not change the power cable length at your own discretion Do not bend the power cord Avoid damaging the power cord Do not position any heating devices or other equipment in close proximity to the unit power cable www ventilation system com UNIT OPERATION SAFETY PRECAUTIONS Do not touch the unit controls with wet hands Do not carry out the unit maintenance with wet hands Use the unit only as intended by the manufacturer Do not connect a clothes dryer or other similar equipment to the unit or the ventilation system Do not sit on the unit and avoid placing foreign objects on it Do not let children operate the unit Keep combustible gases and_ inflammable products away of the unit When the unit generates unusual sounds odour or emits smoke disconnect it from power supply and contact the Seller Do not block the air duct when the unit is on S XI Do not wash the unit with water Protect the unit electric parts from water ingress Do not put any water containers on the unit i e flower vases
12. avourable for the formation of hazardous substances toxic substances dust pathogenic germs THE UNIT MAY NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED PHYSICAL MENTAL OR SENSORY CAPACITIES OR LACKING THE APPROPRIATE TRAINING THE UNIT MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY QUALIFIED PERSONNEL AFTER THE APPROPRIATE BRIEFING THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED ACCESS BY UNATTENDED CHILDREN DELIVERY SET Control panel Packing box DESIGNATION KEY VUT XXX PB EC X X Control panel __ PU SENS 01 with a sensor display A7 PU JK 01 with an LCD display Modification L left handed modification R right handed modification aul Motor type EC electronically commutated motors Heater type W water heater Mounting method P suspended mounting Air capacity m h a Unit type VUT ventilation with heat recovery www ventilation system com TECHNICAL DATA The unit is designed for indoor application with the ambient temperature ranging from 1 C up to 40 C and relative humidity up to 80 Hazardous parts access and water ingress protection rating m IP 44 for the unit motors m IP 22 for the assembled unit connected to the air ducts The unit design is constantly being improved so some models can slightly differ from those ones described in this manual OVERALL DIMENSIONS OF THE UNIT MM H1
13. duct with a flexible one to prevent resonance Flexible anti vibration connectors are another alternative for dealing with resonance WATER HEATER CONNECTION Mixing unit diagram not included in the delivery set of the water heater is shown in the following figure Direct flow connection Counterflow connection water inlet Water outlet water inlet Ye Water outlet A MIXING UNIT DIAGRAM 1 Water heater 2 Shutoff valves 3 Circulation pump 4 Bypass damper 5 Boiler 6 Heat medium regulating valve with an electric actuator 7 Non return valve 8 Coarse filter 9 Water pressure sensor nc HEAT MEDIUM REGULATING VALVE ACTUATOR e Tl oo TS Oo al A WARNING The unit operates either in Winter or Summer mode If the outside air temperature is below 10 C the Winter mode is activated If the outside temperature accedes 10 C the unit operates in Summer mode In Summer mode the unit operates regardless of the return heat medium temperature in the mixing unit In Winter mode the unit has following temperature limits The unit may not be started when the return heat medium temperature is below 40 C If the return heat medium temperature is 40 C and higher the unit will be turned on with a 90 seconds delay The unit tu
14. eplaced For new filters contact your Seller Sequence of filter removal 1 Unlatch and open the service panel Open the panel with care 2 Set the retaining plate aside Pull the filters until they slide off the guides Install the filters in the reverse order 2 Heat exchanger cleaning once per year Some dust may accumulate on the heat exchanger block even in case of regular maintenance of the filters To maintain the high heat recovery efficiency regular cleaning is required To clean the heat exchanger remove the drain pan and the filters from the unit and clean the heat exchanger by using compressed air or a vacuum cleaner Sequence of the drain pan removal 1 Unlatch and open both service panels Open the panels with care 2 Release the drain pipe from the side of the water heater connection and pull it down 3 Release the second drain pipe by pulling the drain pan aside Install the drain pan in the reverse order If a more thorough cleaning of the heat exchanger is required call your service technician www ventilation system com LE 3 Fan inspection once per year Even in case of regular maintenance of the filters some dust may accumulate inside the fans and reduce the fan performance and supply air flow Clean the filters with a vacuum cleaner a soft cloth or brush Do not use water aggressive solvents or sharp objects as they may damage the impeller Access to the fans is from the side of air duct
15. ipping Overcurrent resulted from short circuit in the following the unit electric circuit turning on Low set fan speed Set higher speed The filters and the fans are soiled the heat Clean or replace the filters Clean the fans and the heat exchanger is soiled exchanger The ventilation system components air ducts diffusers louvre shutters grilles are soiled or damaged The air dampers diffusers or the louvre shutters Make sure that the air dampers diffusers or louvre shutters are closed are fully opened The extract filter is soiled Clean or replace the extract filter Check the heat exchanger for freezing Turn the unit off if Cold supply air The heat exchanger is frozen required and restart it after the freezing danger is no longer imminent Malfunction of the water heater Contact the Seller The impeller s is soiled Clean the impeller s Peer The fan or casing screw connections are too Tighten the screw connection of the fans or the casing Noise vibration loose against stop No anti vibration connectors Install anti vibration connectors Clean the drain line Check the drain line slope angle Make sure that the U trap is filled with water and the drain pipes are frost protected STORAGE AND TRANSPORTATION RULES Store the unit in the manufacturer s original packing box in a dry closed ventilated premise with temperature range from 5 C to 40 C Vapours or particles which can cause corrosion
16. ir performed by any persons not authorized by the manufacturer e expiry of the unit warranty period e user s violation of the established regulations specific to the unit transportation user s violation of the unit storage regulations wrongful acts against the unit committed by third persons unit breakdown due to circumstances of insuperable force fire flood earthquake war hostilities of any kind or blockade e missing seals if provided by the user s manual failure to provide the user s manual with the sale date stamp missing payment document certifying the unit purchase FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND TROUBLE FREE OPERATION OF THE UNIT USER S CLAIMS SHALL BE A SUBJECT TO REVIEW ONLY UPON PRESENTATION OF THE UNIT THE PAYMENT DOCUMENT AND THE USER S MANUAL WITH THE SALE DATE STAMP Product type Heat recovery air handling unit Model vuT_PWEC Serial number s O Manufacturing date We hereby declare that the product complies with the essential protection requirements of Electromagnetic Council Directive2004 108 EC 89 336 EEC and Low Voltage Directive 2006 95 EC 73 23 EEC and CE marking Directive 93 68 EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility This certificate is issued following test carried out on samples of the product referred to above Quality inspector s stamp SELLER INFORMATION This is
17. rns off when the return heat medium temperature falls below 20 C CONDENSATE DRAINAGE ARRANGEMENT The drain pan is equipped with two drain pipes for condensate removal outside the unit Connect the drain pipe the U trap not included in the standard delivery set and the sewage system with metal plastic or rubber pipes While laying the hoses provide the slope downwards min 3 Fill the system with water prior to connecting it to power supply During operation the U trap must always be filled with water Provide free drainage for the condensed water otherwise it is accumulated inside the unit that may cause the equipment damage and condensate outflow to the room The condensate drainage system is designed for normal operation in premises with air temperatures above 0 C If the expected ambient air temperatures are below 0 C the condensate drainage system must be equipped with heat insulation and pre heating facilities DO NOT CONNECT SEVERAL DRAIN PIPES FROM SEVERAL AIR HANDLING UNITS TO ONE U TRAP DIRECT CONDENSATE DRAINAGE OUTSIDE WITHOUT CONNECTION TO SEWAGE SYSTEM IS NOT ALLOWED Pipe Sewage system Sewage system Condensate drain pipe OUTDOOR TEMPERATURE SENSOR MOUNTING AND CONNECTION The unit is supplied with the TE1 outdoor temperature sensor The outdoor temperature sensor mounting is as follows 1 Remove two screws that retain the sensor cover 2 Take off the sensor cover 3 Install the
18. s connections 4 Condensate drainage inspection once per year The condensate drainage drain line may get clogged by dirt and dust particles contained in the exhaust air Check the drain line operation by filling the drain pan under the unit with water clean the U trap and the drain line if necessary 5 Exhaust louvre shutters and intake diffusers cleaning as required Wash the diffusers and the louvre shutters with warm detergent solution 6 Supply air flow control twice per year The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery Check the supply grille twice per year and clean it as required 7 Ductwork system inspection once in 5 years Even regular fulfilling of all the prescribed above maintenance operations may not completely prevent dirt accumulation in the air ducts which reduces the unit capacity Duct maintenance means regular cleaning or replacement FAULT HANDLING FAULTS AND FAULT HANDLING N BEWaRcUBpI Make sure the power supply line is connected correctly p PPIy otherwise troubleshoot a connection error The fan s do es no The motor is jammed the impeller blades are Turn the unit off Troubleshoot the motor jam and the start soiled impeller clogging Clean the blades Restart the unit gt For troubleshooting of the control system errors refer to the Alarm in the system control panel manual Automatic circuit breaker tr
19. sensor on the outer wall The installation place must not be subjected to direct solar light 4 Install the sensor cover back 5 Connect the sensor to the X1 terminal block in compliance with the electric wiring diagram www ventilation system com DUCT HUMIDITY SENSOR MOUNTING AND CONNECTION The HV1 duct humidity sensor is a special accessory and is purchased separately Connect the contact socket of the humidity sensor to the contact socket located inside of the heat recovery unit After that fix the sensor using the clamp and the holder in the air duct upstream of the heat exchanger Humidity sensor mounting location CONNECTION TO POWER MAINS DISCONNECT THE UNIT FROM POWER MAINS PRIOR TO ANY ELECTRIC INSTALLATION OPERATIONS CONNECTION OF THE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED ELECTRICIAN WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER CAREFUL READING OF THE PRESENT USER S MANUAL THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE SHOWN ON THE RATING PLATE ANY INTERNAL CONNECTION MODIFICATIONS ARE NOT ALLOWED AND RESULT IN WARRANTY LOSS not less than 2 5 mm The VUT 2000 3000 PW EC air EXTERNAL WIRING DIAGRAM FOR THE UNIT VUT 2000 PW EC handling unit is rated for connection x1 to single phase AC 230V 50 Hz power mains The unit must be connected to M LI N PE 1 2 3 4 5 6
20. side acti 4 400 V AC 12V AC Power sae ONAE 24VAC Digital input DI Digital output DO Analogue input Al Analogue output AO RS485 s Designation me Supply air damper Extract filter Supply fan S Extract fan Control panel Water heater Duct humidity sensor Indoor humidity sensor Plate heat exchanger osme Supply air damper actuator D1 D2 F1 F2 M1 M2 HV2 RK1 M1 SM2 Extract air damper actuator TE1 TE2 TE3 TE4 TES TE6 M4 Intake air temperature sensor Temperature sensor downstream of the heat exchanger Tes Retumheatmesiumtemperatuesensor Tes Water heater freeze protection sensor Air temperature duct sensor Room air temperature sensor DD1 Pump dry run protection relay Circulation pump of the water heater The appliances are not supplied with the unit are available separately Maintenance operations of the unit are required 3 4 times per year Maintenance includes general cleaning of the unit and the following operations 1 Filter maintenance 3 4 times per year Dirty filters increase air resistance in the system and reduce supply air volume The filters require cleaning not less than 3 4 times per year Vacuum cleaning is allowed After two consecutive cleanings filters must be r
21. to certify delivery of the complete unit with the user s manual P we MOUNTING CERTIFICATE VUT ___ PW EC heat recovery air handling unit has been connected to power mains pursuant to the requirements stated in the present user s manual Company name Address Installation technician s full name This is to certify that the works specific to the unit installation has been performed in accordance with all the applicable provisions of local and national construction electrical and technical codes and standards The unit operates normally as intended by the manufacturer www ventilation system com 2 es cen Manufacturing date CY Salescompany ff ee NNN ee Seller s seal gt VENTS
22. tract filter Bypass The basic unit delivery set includes a control panel for connection to the control system inside the unit casing using a data cable The unit is equipped with a supply and an extract centrifugal single inlet fans with backward curved blades maintenance free EC motors with an external rotor and a built in overheating protection a plate counterflow heat exchanger and a water heater The supply G4 filter cleans supply air flow and prevents contamination of the unit parts The extract G4 filter prevents contamination of the unit components Some condensate may form during heat recovery The condensate is collected in the drain pan and is removed from the unit through the drain pipes The unit is equipped with a heat exchanger freeze protection If the air temperature in the intake air duct is below 3 C the bypass damper opens and automatically controls the air temperature Se ee MOUNTING AND SET UP MINIMUM DISTANCE FOR ACCESSING THE UNIT While mounting the unit provide enough space for its maintenance or repair work A minimum distance for condensate disposal arrangement The distance is selected depending on the installation conditions at the discretion of the installer B minimum distance for water heater connection and condensate disposal arrangement The distance is selected depending on the installation conditions at the discretion of the installer min 20 mm C minimum
23. ve e g 90 70 C from here draw a vertical line up to the scale representing the heating coil capacity 42 0 kW m Water flow Prolong the line down to water flow axis at the bottom of the graphic 0 5 1 5 m Water pressure drop Draw the line fromthe point where the line crosses the black curve to the pressure drop axis 6 5 kPa www ventilation system com UNIT DESIGN AND OPERATING LOGIC The unit has the following operating logic Warm stale extract air from the room flows to the unit where it is filtered then air flows through the heat exchanger and is exhausted outside by the extract fan Clean cold air from outside is moved to the supply filter Then filtered air flows through the heat exchanger and is moved to the room with the supply fan Heat energy of warm extract air is transferred to clean intake fresh air from outside and warms it up Heat recovery minimizes thermal energy losses and space heating expenses in cold seasons The unit is equipped with a detachable service panel for repair and maintenance operations and a cover enabling access to the control system components UNIT OPERATING LOGIC TOP VIEW BASED ON VUT 2000 PW EC UNIT EXAMPLE Bypass damper electric actuator a Drain pan Heat exchanger Condensate drain pipe Supply filter Extract fan INTAKE AIR EXHAUST AIR EXTRACT AIR SUPPLY AIR Supply fan a Water heater a Condensate drain pipe Control unit Ex
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