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Instructions for operation and maintenance

www.koja.fi

Air handling unit

Future

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Страница 1: ...Instructions for operation and maintenance www koja fi Air handling unit Future...

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Страница 3: ...1 Operating conditions 12 3 2 Commissioning 12 3 3 Maintenance 12 4 Filter section FSTF 13 4 1 Construction 13 4 2 Operating conditions 13 4 3 Installation 13 4 4 Commissioning 13 4 5 Maintenance 14 4...

Страница 4: ...section motors and frequency converters 33 12 1 Short circuit motors 34 12 2 Connection of electric motor and frequency converter 36 12 3 PM motors 37 12 4 EC motors 39 12 5 Connection of the EBM Fl...

Страница 5: ...on Air handling unit Future complies with the CEN standard EN 1886 classification as follows L2 leakage class for casing T3 heat transfer coefficient for casing 1 3 Sound level For the unit s sound da...

Страница 6: ...east 10 mm2 Cu or 16 mm2 Al Alternatively the frequency converter supply can be equipped with an additional protective earth conductor of the same cross section than the actual protective earth conduc...

Страница 7: ...must be presented in order to retain the warranty If the motor has to be removed or the fan disassembled due to maintenance or repair work permission is needed from Koja Ltd s Warranty Handler Otherwi...

Страница 8: ...ure difference across the filter It indicates the pressure difference and or gives an alarm For the purpose of the filter indicator please refer to the section covering the filters 1 5 3 Fire thermost...

Страница 9: ...630 Serial number a conforms with the essential requirements of the directives listed below provided that the said products are installed in accordance with the instructions supplied with the unit Con...

Страница 10: ...e access doors In access doors without hinges the earthing conductor must be connected to a quick disconnect connector after attaching the door see picture Earthing of access doors CAUTION The motor o...

Страница 11: ...that all shut off and control devices instruments and the signal lamp are functioning The stated maintenance intervals are only guidelines The intervals are determined by the utilisation rate of the a...

Страница 12: ...is 40 80 C The maximum permissible pressure difference across the damper is 1 200 Pa 3 2 Commissioning Make sure that the dampers of the sections open and close fully and that the actuator works accor...

Страница 13: ...w direction is downwards only The air flow direction is marked on the filter section and on the filters If there are no markings the filter section must be installed so that the air must enter the fil...

Страница 14: ...that there are no leaks Check that the filters are clamped in place Check that the differential pressure gauge is intact and reset Check that the differential pressure hoses of the filter section are...

Страница 15: ...2 550 24 3627 3 790 2 870 6 24 3630 3 790 3 190 30 The thickness of the mounting frame is 25 1 mm 4 7 Replacement of gasket Dimensions of the mounting groove and filter cassette frame A new gasket is...

Страница 16: ...5 1 Operating conditions The maximum operating temperature is 150 C The maximum operating pressure is 1 0 MPa CAUTION The coils of large units have been split in two The condensation water drain of th...

Страница 17: ...connection and the left handed according to the figure Left handed connection the heat exchanger must be bled carefully in order to ensure proper fluid circulation in the piping The connection princi...

Страница 18: ...control valves to fill the coil with fluid Bleed the coil Make sure that the water side connections of the coil do not leak Check the rotation direction of the circulating pump do not run the pump dry...

Страница 19: ...on Check and clean the condensation water discharge system i e drip tray piping and water trap traps A damaged coil must be repaired in place sent to the manufacturer to be repaired or replaced CAUTIO...

Страница 20: ...he belt will have allowance for stretch with respect to the limit switch if necessary If necessary adjust the brush seals on the circumference of the rotor so that they touch the surface of the heat e...

Страница 21: ...a magnet Twice a year Check and clean the heat transfer surfaces Make sure that the brush seals lightly touch the surface of the heat exchanger Replace damaged brush seals Check the sectorised rotor p...

Страница 22: ...cuum cleaner compressed air or water CAUTION If you use a brush make sure not to damage the heat exchanger lamellas CAUTION If you use compressed air point the nozzle perpendicular to the lamellas and...

Страница 23: ...Protective casing A B Loosen the rotor mounting bolt Adjust the rotor position with the rotor adjust ment bolts located at the bottom part of the beam Check the rotor position by rotating the rotor by...

Страница 24: ...ent of drive belt Tighten the belt around the heat exchanger and pulley Cut the belt to a length that allows it to fit snugly over the pulley When fastened the belt expands automatically to the correc...

Страница 25: ...0 25 7 HEAT RECOVERY SECTION PLATE FRTL 7 1 Operating conditions The maximum operating temperature is 80 C The maximum permissible pressure difference between inlet and outlet air is 1 000 Pa 7 2 Inst...

Страница 26: ...Dimensioning instructions for water trap The same principles apply to the dimensioning of the water trap in the heat recovery section as to the water trap in the coil section Coil at the inlet side o...

Страница 27: ...drains the coil can be cleaned with water and a mild detergent NOTE Do not use pressure cleaning Check and if necessary clean the condensation water discharge system i e drip tray piping and wa ter tr...

Страница 28: ...the electrical connections and joints and the direction of air flow which must be according to the arrow marked on the section Give the coil a test run If the overheating protector trips during the te...

Страница 29: ...cessary Clean the coil gently with a brush compressed air or a vacuum cleaner If the unit has water drains the coil can be cleaned with water and a mild detergent NOTE Do not use pressure cleaning Che...

Страница 30: ...l up with water At the same time make sure that there are no leaks and che ck the operation of the overflow pipe If circulating water is used start the pump when the tray is full of water When the air...

Страница 31: ...ntly with a brush compressed air or a vacuum cleaner If the unit has water drains the coil can be cleaned with water and a mild detergent NOTE Do not use pressure cleaning Check and clean the condensa...

Страница 32: ...ding to the humidifier manufacturer s instructions 11 2 Commissioning Check the condensation water discharge system i e drip tray piping and water trap Flush the piping and fill the water trap CAUTION...

Страница 33: ...the maximum frequency is not exceeded WARNING The motor and or frequency converter supply cables must be equipped with a service switch If the service switch is installed between the motor and frequen...

Страница 34: ...manufacturer s instructions The motors are also available with separate therm istors or temperature switches The motors are suitable for frequency converter control Most motors have sealed bearings Mo...

Страница 35: ...ctions must be set to approx 10 Hz and maximum frequency instructions according to the fan dependent maximum frequency The current limit is set close to the rated current The frequency converter motor...

Страница 36: ...ions Check the electric motor connection from the link box and or the type plate of the motor The electric motor is connected to the electrical network with a shielded connector and equipped with a se...

Страница 37: ...he motor in question Parameterisation includes the motor plate values ramps speed and frequency limits as well as settings for starting and stopping The parameters related to the frequency convert er...

Страница 38: ...one the connection must be made according to the general EMC requirements The length of the motor cable must not exceed 10 meters The frequency converter supply cable must be equipped with a service...

Страница 39: ...er a malfunction This may happen for example if the set point is saved on the fan memory The EC motor control unit parameters and the operation of the control connectors can be changed via the Mod bus...

Страница 40: ...rdering the fan so that it can be included in the delivery The current limits are 10 mA for the 10 V output and 40 mA for the 20 V output Do not connect output con nections of various devices with eac...

Страница 41: ...limits are 10 mA for the 10 V output and 70 mA for the 24 V output Do not connect output con nections of various devices with each other 12 7 Maintenance spare parts and warranty WARNING The operatio...

Страница 42: ...tructions must be followed In case of a discrepancy between these instructions and the component manufacturer s instructions follow the component manufacturer s instructions For the detailed component...

Страница 43: ...sure that the inside of the fan section and the fan are free from loose parts debris etc that could get between the belts or the impeller Make sure that the flexible joint and the vibration dampers ar...

Страница 44: ...f the fan has grease fittings lubricate the bearings according to the enclosed instructions Replace worn V belt pulleys and V belts If the drive has several grooves all the belts must be replaced at t...

Страница 45: ...hoses are in place and intact That the hoses are not flattened out That there are no blockages in the hoses or pressure joints Indicator air flow meter that the air flow meter has been reset and the...

Страница 46: ...C fan The fan vibrates produces noise or resonates Check that the impeller is clean and has no external damage Clean the impeller with a vacuum cleaner that has a soft brush nozzle if necessary Contam...

Страница 47: ...ll new belts according to the instructions X X Hard particles in the grooves Check the guards replace the belts X X Belts unequally tensioned Follow the installation instructions X X X X X Belts are o...

Страница 48: ...and a mild detergent during the annual maintenance or when necessary Those parts of the unit that have water drains can be washed from the inside with running water CAUTION Make sure that the unit ba...

Страница 49: ...orption damper The lamellas must be in vertical position see the figure Make sure that the lamellas are intact and that the coating is not damaged 16 2 Maintenance Check that the sound attenuator lame...

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Страница 52: ...Tel 358 3 282 5111 koja koja fi www koja com...

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