INSTALLATION OPERATION MAINTENANCE INSTRUCTION HEAT PUMP HEAT RECOVERY UNITS VHR MODELS

Transcription

1 INSTALLATION OPERATION MAINTENANCE INSTRUCTION HEAT PUMP HEAT RECOVERY UNITS VHR MODELS & VENCO Havalandırma ve Makina San.ve Tic. A.Ş Cad. No: OSB Turgutlu MANISA / TURKEY Tel: 0 (236) Fax: 0 (236) venco@venco.com.tr

2 Index 1. INTRODUCTION HEAT RECOVERY UNITS and VHR MODELS... 4 Figure VENCO VHR DX HEAT PUMP HEAT RECOVERY UNIT... 4 Figure Heat Pump Heat Recovery Units Parts TECHNICAL SPECIFICATION for HEAT RECOVERY UNITS... 6 Table 3.1. VHR DX Heat Pump Heat Recovery Unit Technical Specifications... 6 Table 3.2. Dimensions for VHR DX Heat Pump Heat Recovery Unit WORKING CONDITIONS TRANSPORTATION STORAGE INSTALLATION Transportation... 8 Figure Lifting Schema Storage Installation... 9 Figure Connection Schema... 9 Figure Installation Schema CONNECTIONS Duct Connections Figure In.Free Outlet Figure Ducted Outlet Figure Unit Duct Connection Drain Connections Electrical Connections SAFETY REQUIREMENTS Warnings and Precautions Warning Labels Figure Manuel Label Figure Electrical Warning Label Figure Temperature Warning Label Figure Repair Warning Label Figure Wiring Diagram Label Figure Ground Label Figure Fan(Spinning) Label Figure Electrical Warning Label Figure Access Door Label / 34

3 Figure Filter Access Door Label Figure Drain Label Figure Fresh Air Label Figure Exhaust Air Label CONTROLS BEFORE START UP Body Filters Heat Recovery Exchanger Fans and Motors SAFETY WARNINGS USING THE UNIT Warning Signs Training of Technicians General Hazards Prevention Table General Hazards START-UP AND OPERATING Commissioning Operating ELECTRONIC CONTROLLER BOARD DX Controller Figure DX Controller Table DX Key Pads Controls MAINTENANCE COMMISSIONING AND START UP SERVICE After Sales Service APPENDIX VHR 40 DX Electrical Wiring Diagram VHR 40 DX Appendix VHR 40 DX Appendix VHR 30 DX Electrical Wiring Diagram VHR 30 DX Appendix VHR 30 DX Appendix / 34

4 15.7 VHR DX Electrical Wiring Diagram VHR DX Appendix VHR DX Appendix Fuse And Wiring Selection / 34

5 1. INTRODUCTION Installation, Operation and Maintenance Instruction concerns VHR DX heat pump heat recovery units manufactured by VENCO. It consists of basic information and recommendation concerning the design, technical specifications, installation, operation and maintenance of the heat pump heat recovery unit which shall be obeyed to ensure proper operation of the unit. The key to proper and safe operating of the unit, read thoroughly this instruction, use the unit according to guidelines given in it and follow all safety requirements. The instruction should always be in proximity of the unit and within easy reach of the service technician. READ THE INSTRUCTION BEFORE START-UP THE UNIT and KEEP THE MANUAL CLOSE TO THE UNIT FOR EASY REACH OF SERVICE TECHNICIAN. THE UNIT MUST BE OPERATED APPROPRIATE APPLICATIONS FOR PURPOSES DESIGN AND TECHINICAL SPECIFICATIONS OTHERWISE THE REPONSIBILITY OF ANY PROBLEM WILL NOT BE IN WARRANTY TERMS THE UNIT MUST NOT USED IN THE ENVIROMENTS WHERE CORROSION and EXPLOSIVE GAS EXIST THE APPLIER WILL BE RESPONSIBLE FOR DEFECTS OCCURED DUE TO OPERATING THE UNIT BY NOT AUTHORIZED PERSON or USING THE SPARE PARTS WHICH ARE NOT ORIGINAL. 2. HEAT RECOVERY UNITS and VHR MODELS VENCO Heat Recovery Units are classified 8 different models; VHR 05 DX 07 DX 10 DX 15 DX - 20 DX 21 DX 30 DX 40 DX (Figure 2.1.). In all models, the housing is made from epoxy coated galvanized sheet metal and the cabinet is fully insulated for sound and heat isolation. Figure VENCO VHR DX HEAT PUMP HEAT RECOVERY UNIT / 34

6 Heat Pump Heat Recovery Units as standard consist of seven different parts as described; These parts Exhaust Fan, Supply Fan, Fresh Air Filter, Exhaust Air Filter, Plate Type Heat Exchanger, Exhaust Coil and Fresh Air Coil part, Compressor and Electrical Connection Box. Exhaust Air Filter and Fan Part Fresh Air Filter and Fan Part Heat Exchanger Fresh Air Coil Exhaust Air Coil Electrical Connection Box Compressor Part Figure Heat Pump Heat Recovery Units Parts DX Electronic Controller; VHR DX type heat pump heat recovery units controlled by DX controller. The supply air fan and return air fan are driven as 5 speeds with separately and with optionally added electrical heater can be set up with electronic controller. Moreover electrical heater runs automatically through DX controller. Fresh air fan stop running 30 seconds after to cool the electrical heater when the unit switch off. DX controller has a protection system (optional) against the frost formation at the temperatures below -5 C, and Pressure Sensor (optional) for clogged filter. Moreover to DX, CO 2 sensor or air quality sensor could be optionally connected. The fan speed automatically changes by regarding to the sensor value. Building Automation System; DX controller has a digital input for Building Management System or VRF (VRV) System and also has a digital output for the unit status information. Moreover, the unit can be controlled for all functions by the BMS or VRF main control system through MODBUS / 34

7 3. TECHNICAL SPECIFICATION for HEAT RECOVERY UNITS Technical specifications, which are valid for the heat pump heat recovery units are given in the table below. Table 3.1. VHR DX Heat Pump Heat Recovery Unit Technical Specifications MODEL VHR 05 DX VHR 07 DX VHR 10 DX VHR 15 DX VHR 20 DX VHR 21 DX VHR 30 DX VHR 40 DX Air Flow m³/h External Static Pressure(0 Pa) Pa Electrical Data 230Volt / 50Hz 400 Volt / 50 Hz Fan Absorbed Power W 2x102 2x155 2x225 2x515 2x515 2x550 2x550 2x1400 Compressor Absorbed Power W ELECTRICAL DATA Cooling Total Absorbed Power Total Cooling Capacity Compressor Absorbed Power W W Btu/h W Heating Total Absorbed Power Total Heating Capacity W W Btu/h Air Filter Placed at fresh and exhaust air inlet - Cassette Filter / 34

8 Indoor Outdoor Table 3.2. Dimensions for VHR DX Heat Pump Heat Recovery Unit VENCO MODEL VHR 05 DX VHR 07 DX VHR 10 DX VHR 15 DX VHR 20 DX VHR 21 DX VHR 30 DX VHR 40 DX Length [mm] L Width [mm] W Height [mm] H Duct Connection [mm] ød Weight [kg] W Dimensions [mm] W W W Service Clearance [mm] Ls H L W Exhaust W1 ød W3 Fresh Air Fresh Air W2 W4 Exhaust Ls / 34

9 4. WORKING CONDITIONS VENCO VHR DX heat pump heat recovery units effectively work at -5 C and +45 C for outdoor conditions. The unit is not applicable to apply for the corrosive conditions. For different working conditions, please contact with VENCO. There is a frost protection kit exist to prevent freezing in heat exchanger at heat pump heat recovery units. With the frost protection case; if the exchanger thermostat senses below -5 C, fresh air fan jumps to highest speed, and exhaust fan drops to lowest speed. And there is a warning message Frost Protection popups on the controller screen. The unit functions and the controller screen rolls back to normal situation, when the exchanger thermostat senses above -5 C. 5. TRANSPORTATION STORAGE INSTALLATION 5.1.Transportation All the products tests have done by VENCO before the product send to the customer. During transportation, lifting and landing, heat recovery units are damaged especially due to wrong methods usage. Appropriate lifting methods should be used in order to minimize any possible damage. Trans pallet or forklift can be used for lifting or transporting small units. Lifting and transportation should be done with trained and experienced personnel and security precautions should be taken to prevent the unit to fall over or slide. During lifting and transportation of the unit, nobody should stay under the unit or in the front of the unit (Figure 5.1.1) During the carriage, prevent any possible pressure can occure on top of the surface or side covers of the device.. Figure Lifting Schema 5.2 Storage VENCO heat recovery units have to be kept in a closed area where the heat should be between 20 ºC and + 40 ºC and relative humidity should not exceed 80%. Also the unit should be kept away from dust, gas, corrosive streams and effects causing corrosion. Prepare the package considering to prevent any resulting damage of electrical assembly, air inlet and outlet. Prepare a different package for more sensitive parts as filters / 34

10 5.3 Installation VENCO rules should be implemented during the final assembly. Before the installing of heat recovery units, customers should control whether weight and dimensions of the stations are suitable for the places from where stations will pass through and assembly will be carried out. The unit has to be install horizontally, any angle installation will cause a problem. There should be sufficient amount of place around the unit to be able to give service and for piping connections. Heat recovery units should be assembled onto a hard and flat base. Damages due to wrong transportation-storage-installation are not covered under warranty. OUTDOOR Fresh Air Suction INDOOR Exhaust Suction OUTDOOR Exhaust Flow INDOOR Fresh Air Flow Duct Type Electrical Heater Connection Part L = 2 D Figure Connection Schema / 34

11 Rot FAN and Filter Service Cover Electrical Connection Box Compressor Cover Figure Installation Schema 6. CONNECTIONS 6.1. Duct Connections Return air, fresh air, exhaust air and supply air ducts should be fixed (connected) to the unit with flexible connection. Required leak-proofing should be obtained in order to ensure desirable air flow. Having improper (bad) unit duct connections and wrong dimension, shape and duct fragments inside of the connection may cause turbulence. Free Flowing Status; Centrifugal fan which is outgoing directly, is a poor efficient exhausting system That turbulence can disappear with an additional duct or with an additional expansion part. It is more important when the applications for orifice and distributor which use laminar method for pressure calculation. Turbulence causes increasing the pressure loses. ( Figure 6.1.1). Figure In.Free Outlet It is very important to make the connection between flowing the unit connection and flexible connection carefully to prevent noise and vibration Fan input and duct axis have to be proper and flexible connection should not be an accordion. Air passage has to be smooth. (Figure 6.1.2) / 34

12 Figure Ducted Outlet. Figure Unit Duct Connection When air flow direction is changed at fan blowing outlet, excessive losses may occur. If this is compulsory, connections should be done as Figure The length of duct, before the elbow or electrical heater, should be double of the outlet-diameter Figure Unit Outlets when the air flow direction change 6.2. Drain Connections The diameter of drain pipe should be equal the diameter of drain pipe on the unit. Drainage pipe and drain pan connections should be made by ripple and flange to be able to dismantle pipe connections easily in order to clean up the residue occurred on drain pan and pipes. The pipe coming out of the drain pan should be connected to a U or P shaped flusher pipe and should be filled with water in order to not to cause air suction as described left side / 34

13 6.3. Electrical Connections ALL ELECTRICAL CONNECTIONS SHALL BE DONE ACCORDING TO EN BY TRAINNED AND AUTHORIZED PERSONEL ALL HEAT RECOVERY UNITS HAVE ENERGY CABLE ON THEM. PLUG, PLUG FUSE AND CABLE CROSS SECTION HAVE TO BE CHOSEN PROPERLY. THE GROUND CONNECTION HAS TO BE DONE. UNIT GROUND CONNECTION HAS TO BE DONE ON ENERGY CABLE AND IT HAS TO BE DONE FROM GROUND CAPSCREW ON THE BODY. The electrical materials, cables and all relevant control and remote control equipment should be chosen and designed suitable to unit requirements. All the cables belong to equipment s has to set properly not to give any damage to the product. Puncture of product can cause water leakage or air leakage. Repairment of the inside insulation has to be done immediately if any damage occurs. The particles have to be removed if there is any inside the unit. These kind of products cause corrosion especially in the high humidity conditions. For unit electrical connections, put the safety fuse to the main supply board.(for capacity list, go to document APPENDIX-4 ) All the electrical connections have to be appropriate to given document APPENDIX SAFETY REQUIREMENTS 7.1. Warnings and Precautions All the safety precautions were taken for usage of these devices. However, the unit can be dangerous if the unit is not used or the service is given by non trained and unexperienced technicians, and indicated security precautions are not followed. For this reason, the necessity was felt to explain security rules of heat pump heat recovery units and explain possible dangers and precautions. Never expose the unit to moisture, strokes and external effects. Don t use your products in explosive and corrosive conditions. The unit should be maintained by trained technicians. Do not repair or adjust, while the unit is running. Turn the electrical switch off and wait for the motor blades stop, before open the unit. Wait for two minutes minimum Never expose fans, cables and connections to the water. If the outside temperature is less than -30 C, the unit must be stopped. The condense water can be frozen at the temperature less than -30 C, it can be damaged to the exchanger. Do not operate the unit, when the access doors are open and the duct connections are not completed / 34

14 7.2. Warning Labels Necessary warning labels are placed on to unit for the users or service personnel. When the unit is put into the operation, following stickers have to be controlled whether they are existing or not. Safety Labels: Figure Manuel Label Figure Electrical Warning Label Figure Temperature Warning Label Figure Repair Warning Label Figure Wiring Diagram Label Figure Ground Label Figure Fan(Spinning) Label Figure Electrical warning Label Figure Access door label Figure Filter Access door label Figure Drain label Figure Fresh Air label Figure Exhaust air label Figure Air flow direction label / 34

15 8. CONTROLS BEFORE START UP Please make sure that all electricity cables are made according to (EN ) standards and security and protection units belong to all elements. Please make sure that all parts of the unit are clean. There can be duct insulation residuals, bands etc Body Please check the inside of product, are there any particles which can damage the unit. Please check both inside and outside of product are there any damages were happened because of mechanical reasons. If yes, please note the main reason and apply the precautions not to go wider. If necessary please contact with VENCO Filters Maintenance of the filters should be done regularly. Dirty filters can decrease air flow and consequently the capacity. Synthetic or metal filters can be cleaned or washed. However it is advised to change synthetic filters every two years Heat Recovery Exchanger Is controlled before transportation. The plates of heat recovery exchanger should be checked, after transportation Fans and Motors Wiring shall be done, according to international standards. The turning way of fan-blades should be checked, according to the air-flow direction label on the fan / 34

16 9. SAFETY WARNINGS VENCO heat pump heat recovery units are produced in accordance with EN standards and to fulfill the requirements MD 98/37 of the European Directives. The products have CE mark. This user manual is prepared to provide correct usage and assembling of the heat recovery unit and warn the maintenance personnel for the possible dangers they may occur. Apart from instructions and warnings of the producers, legal rules and standards have to be taken into consideration as well. The moving parts inside the unit (fan, motor, etc.) and electrical components where regions are considered to be hazardous areas. Appropriate equipment and protective materials should be used in these areas to work Potential hazards related to heat recovery units evaluated in three groups..the hazards for operator The hazards for unit damages. The hazards for unit working efficiency 9.1. USING THE UNIT VENCO Heat Pump Heat Recovery Ventilation units, as well as providing energy savings, has been designed to achieve a high quality of indoor air. Use for other purposes is deemed as illegal. In such cases, the user will be completely responsible any possible damages that will arise. The unit cannot be used to ventilate flammable and combustible gases. Transportation, installation and operating instructions must be followed carefully in order to use the unit specified. Commissioning and installation procedures must comply with the standards in force in the country of the user. User is responsible to fulfill all requirements mentioned in this manual. Moreover the users have to hesitate any kind of working method which contains risks. Any changes on the device by the user or the operator are strictly prohibited. Warranty does not cover any type of damage will be caused by the changes Installation, start up, and maintenance works can only be done by authorized and trained technicians. The technician has to be informed by the owner of the unit or it s user about possible dangers. Electrical fuse must be off during the maintenance activities / 34

17 9.2. Warning Signs Warning labels are put on the unit for operating and maintenance persons. Check the location of labels when the devices are ready to start up, are they appeal or not. Repair and maintenance is ban label while unit is operating Power cut off warning label on the device before opening the door Electrical parts warning label 9.3. Training of Technicians Installation, start-up and maintenance works can only be done by authorized and trained technicians. The technician has to be informed by the owner of the unit or its user about possible dangers he/she may face during following phases: Electrical Connections Duct Connections Putting Into Operation Maintenance For the continuity of the warranty, control and maintenance responsibilities have to be accepted and followed strictly. You can apply to VENCO A.S. to train your authorized technicians General Hazards Prevention Heat recovery units service cover is screwed to the unit. Thus, with the danger of unauthorized persons are prevented to reach inside the unit. The most important potential hazards to human life and health are described below. Units are manufactured in accordance with the Machinery Directive 89/392/EEC. If the user wants to take further precautions to avoid possible damages the following table must be considered. Table General Hazards HAZARD TYPE HAZARD SOURCE HAZARD Don t touch moving parts Fan, electrical motors İnjury Risk Don t touch which is electrical Electrical parts electrical cables Vital Risk / 34

18 10. START-UP AND OPERATING Commissioning Instructions have to be followed before operating the unit for the first time (or after yearly maintenance). Additionally, following checks have to be done. Please make sure that all parts of the unit are clean. There can be duct insulation residuals, bands etc. Please make sure that all electrical cables are connected according to (EN ) standards and security and protection units belong to all elements CABINET; Make sure that the clean up all the parts of heat recovery unit. Check the service covers are installed at the correct places. FILTERS;. All filters must be put inside the unit. HEAT RECOVERY EXCHANGER;. Check the surface of battery if any pieces on it. Fill the pan with water to control the draining and make sure that the siphon is not obstructed. FAN and MOTOR GROUP; Before commissioning of unit, the fan and motor mounting screws should be checked carefully. After switching on the unit, the sound should be listened. Motor current values should be checked with label values whether it is appropriate Operating After maintenance and service manufacturer's instructions should be followed. In addition please check the below introductions. Check the fan and the motor spins freely. Check the fan at the entrance for any residual. Fan and motor connections. Check duct connections in accordance with manufacturer recommendations and check if they are designed in accordance with acceptable engineering practice. Check the service doors closed and the filters are installed. If the unit will start up while the service doors are open, the fans will take excessive current and fan motors may burn out. Check the following points carefully: Provide electricity and run the fan to operate in the highest speed. Check unexpected noise Motor current and voltage values Stop the operation immediately if any problem appears. Turn off the power. Please check the reason of the problem and, correct it. Check the motor current, and check whether it matches the value on the motor label / 34

19 WARNING: Check whether any changes at the fan. A more detailed explanation of the problems and the possible causes of these problems is given in "troubleshooting" section. For questions about the changes during periodic observations, you can contact VENCO or other competent adviser. Make the fan stop until to fix if any vibration appears at fan. The changes of sound level at fan can be a sign to fix a failure. Changes in current drawn by the motor indicate a problem with the system. Increase at the current, the system may indicate that large-scale changes / 34

20 11. ELECTRONIC CONTROLLER BOARD DX Controller VENCO DX heat recovery device used to control the fresh air fan FAN1 (5 step+auto), the exhaust air fan FAN2 (5 step+auto), the selection of mode (heating cooling and fan). İnformation on the control keys are given in the following template. Figure DX Controller Table DX Key Pads Controls Button Name Description ON / OFF Unit will be ON or OFF. MODE Select Running Status (Cooll, Heat or Fan ) FAN Fan1 and FAN2 stepped control button. Value Increase Increases of the set value. Increases the value of selected by fan button area. Value Decrease Decreases of the set value. Decreases the value of selected by fan button area / 34

21 Using the mode button, you can make the mode (Heat, cool and fan) selection. If the fan button is pressed, makes of the fresh air fan speed control (1 / 2 / 3 / 4 / 5-automatic). When the fan button is second pressed, makes of the exhaust fan speed control (1 / 2 / 3 / 4 / 5-automatic). If fans are running automatically, (A)icon appears on the screen. Fans automatically run in heating and cooling mode. Air quality and CO 2 sensors have to be connected for automatic run of the fans. While in fan mode, fans don t automatically run. If the fans automatically run in different modes, when switched to fan mode automatic run is stop. Steps manually set with controller. Electronical Controller Functions: Device ON / OFF Stage control of FAN1( fresh air fan) (OFF / 1 / 2 / 3 / 4 / 5 / AUTO) Stage control of FAN2( exhaust fan) (OFF / 1 / 2 / 3 / 4 / 5 / AUTO) Heat, cool and fan mode Note: When electrical heater is working, FAN1 or the device is shutdown; FAN1 will work at stage 5 for 30 seconds to cool electrical heater. Electrical heater will not work when FAN1 is OFF. Electrical heater only runs in the heat mode which runs automatically depends on the room temperature and set point. Electrical heater will not run when fresh air fan is off. In optionally, 0 ~ 10V (DC) output connected the air quality or CO2 sensors, If FAN1 or FAN2 AUTO speeds is selected, the fan speeds according to the data from the sensors will automatically change the step. FEC electronical controller can perform device ON / OFF from the dry contact information it gets from the building automation system or similar system (VRV, VRF controller, timer etc.). By a dry contact on the relay card connected to the BMS input; when dry contact is ON (short circuit) the device is activated and starts to work in the position where previous closed. In this case, by using the front panel interfering device ON /OFF equipment position change operations can be performed. When the dry contact is off, the device closes down and you can t interfere to the device from the front panel. (I-91 or I-81) terminal of electronic controller on relay card used for device location information. Building automation system and central controller helps to follow heat recovery unit position. (I) terminal has dry contact, it takes position on when the unit start and it takes position off when the unit turn off. Dry contact outputs are given from H terminal. The terminal is on mode ON when the unit gives failure and the terminal is on mode OFF if there is no troubleshoot. Note: For VHR 40 DX terminal I-91 Optionally, there is a system which prevents plated heat recovery from freezing under low temperature. When icing is determined in the plated heat exchanger, fresh air fan will stop and exhaust fan will run at maximum step for defrosting. After defrosting, the device will return to its normal run conditions. Under these circumstances AL 01 will be shown on screen. Commands from the front panel will not run. When power is on, press the button for 10s till to display hh:mm and hh flash, press or to adjust hour. Press, mm flash, press or to adjust minute. Press, week flash, press or to adjust Mon to Sun / 34

22 After adjusting the above settings, to adjust timer settings press till to display MON and ON, and also hh flash, press or to adjust hour, press till mm flashes, press or to adjust minute; Press till mm flashes,press or to adjust minute; Press till to display MON and OFF, andalso hh flash, press or to adjust hour, press, mm flash, press or to adjust minute. The setting method is same for other days. 12. MAINTENANCE Before all the periodic maintenance, the device is switched off and wait at least two minutes for the fan stop working completely. Drain Outlet once in 3 months, please check water flow from drain pipe. Air Filters; once in 3 months, please check the filters. Please wash it or change it when necessary. Otherwise ventilation will inefficient and energy consumption will raise. Fans and Motors; Once every-season, please check them by opening access door. It prevents imbalance and risk of breakdown. Wiring and Electrical Connections; Once a year, please check the ampere. Construction and Housing; Once a year, please check it for resistance to corrosion. Heat Recovery Exchanger; Once in two years, check it by taking it out for preventing creation of high pressure. Exchanger can be cleaned by using the warm water & light detergent. After cleaning, all plates surface of exchanger should be dried Cooling Circuit; should intervene only in cases of failure by an authorized service. 13. COMMISSIONING AND START UP Turn off the fan before check the fan and system. During maintenance, the electrical connection of the unit should be stopped completely. All switches and circuit breakers must be positioned to the OFF get locked as well Fault-finding method: a) See the finding fault tablet find problem b) If the reason of the problem cannot be found follow System Control List," according to the procedure. c) It is recommended that you contact the manufacturer whether the problem continues. System Control List Systematic control of items listed below will help you to identify the problem. a) Air passing surfaces at the fan (wings, body and fan inputs) clean. b) Fan blades and anybody damage c) Cleaning of filters and ducts d) Fan output connections are correctly designed and installed. e) Ducts and the units have no leakage / 34

23 f) If the reason of the problem is still not solved, contact the manufacturer. Try to prepare the following information will be needed for manufacturer. a) Unit model,type and serial number b) Location of the unit and usage type c) Duct details d) If available the measurements (airflow data, motor current etc.) / 34

24 13.1. Diagnosing and Fixing Table PROBLEMS INDICATIONS POSSIBLE REASON OTHER RESONS and REMEDIES No power Check the power supply NO AIR FLOW Motor is not working No current Control Panel Off Thermal protection is open Controller cable fault The cables are defected which contacts motor Contactors or terminal are not tight Check the controller cable and behind socket, it may work off or defected. Pressure loss in the ducts are higher than calculated Check and compare the external static pressure according to Table 3.1 Check the duct design LOW AIR FLOW Too much leakage at the pressure side of system Filters clogged or dirty Filter doors are not closed or duct connections are not completed Clean filter or change it if necessary Check the doors and duct connections. Duct resistance is very low than expected Check and compare the external static pressure according to Table 3.1 Check the duct design. HIGH AIR FLOW Too much leakage at the suction side of system Duct connections are not completed Check the duct connections Overcurrent of fan motors Supply voltage is low Grills are not installed Engine is over loaded. Measure the current taken by engine. Install the grills Filters are not installed Put the filters in Case of Insufficient Air Flow Be sure that fans working, check the filters and system LOW PRESSURE FAULT On the controller screen Low Pressure Others Contact with the manufacturer Case of Insufficient Air Flow Be sure that fans working, check the filters and system HIGH PRESSURE FAULT On the controller screen High Pressure Others Contact with the manufacturer / 34

25 14. SERVICE After Sales Service VENCO heat recovery units does not require any replacement or repair beyond the control eye control and cleaning done by the user. Users must contact with VENCO for the faults. They identify during the maintenance or commissioning operation. Contact the information s given below for your service requirements and other problems. VENCO A.Ş Sokak No:5 OSB Turgutlu / MANISA PBX: Fax: venco@venco.com.tr / 34

26 15. APPENDIX VHR 40 DX Electrical Wiring Diagram / 34

27 15.2 VHR 40 DX Appendix / 34

28 15.3 VHR 40 DX Appendix / 34

29 15.4 VHR 30 DX Electrical Wiring Diagram / 34

30 15.5 VHR 30 DX Appendix / 34

31 15.6 VHR 30 DX Appendix / 34

32 15.7 VHR DX Electrical Wiring Diagram / 34

33 15.8 VHR DX Appendix / 34

34 15.9 VHR DX Appendix / 34

35 16. Fuse and wiring selection Fuse MODEL ELECTRIC POWER VOLTAGE - HZ FUSES VHR 05 DX 1290W 230 volt 50 Hz 10A VHR 07 DX 1350W 230 volt 50 Hz 10A VHR 10 DX 2020W 230 volt 50 Hz 16A VHR 15 DX 3270W 230 volt 50 Hz 20A VHR 20 DX 3820W 230 volt 50 Hz 25A VHR 21 DX 3820W 230 volt 50 Hz 25A VHR 30 DX 5986W 400 volt 50 Hz 3X16A VHR 40 DX 8400W 400 volt 50 Hz 3X16A Wiring Cable section [mm²] MODEL 1,5 2, Cable length [m] VHR 05 DX VHR 07 DX VHR 10 DX VHR 15 DX VHR 20 DX VHR 21 DX VHR 30 DX VHR 40 DX / 34