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Translation from original instructions

Packaged Rooftop

We reserve the right to make changes without any prior notice.

UATYA

4P645202-1

7.4 Periodic checks

Carry out periodic checks to make sure the unit is working correctly:

OPERATION

RECOMMENDED

FREQUENCY

Check the operation of all the control and safety equipment as described previously.

Monthly

Check the tightness of the electrical terminals in the electrical control panel and in the terminal

boards of the compressors. The moving and fixed contacts of the contactors must be cleaned

periodically and should be replaced whenever they show signs of deterioration.

Monthly

Check the refrigerant charge through the liquid sight glass.

Monthly

Make sure there are no oil leaks from the compressor.

Monthly

Make sure there are no water or water/glycol mixture leaks in the hydraulic circuit.

Monthly

If the unit is to remain out of service for a long time, drain the water from the pipes and the

heat exchanger. This operation is necessary if ambient temperatures lower than the freezing

point of the fluid used are expected during the time it is to remain stopped.

Seasonal

Check the filling of the water circuit.

Monthly

Check that the differential water pressure switch, or the flow switch (where present), is working

correctly.

Monthly

Check the crankcase heaters of the compressors.

Monthly

Clean the finned coil by following the instructions in the “External cleaning” section according

to the type of coil installed

3 months

Clean the air filters

Monthly

Clean the ventilation filters of the electrical control panel.

Monthly

Carry out the defrosting test.

Monthly

Check the moisture indicator on the liquid sight glass (green = dry, yellow = wet). If the

indicator is not green, as indicated on the sight glass sticker, replace the filter.

4 months

Check the condition, fixing and balance of the fans.

4 months

Check that the noise emitted by the unit is normal.

4 months

Test performed to check correct operation of the refrigerant leak detection sensor and its safety

chain connected downline

Yearly

Check that the cable glands in the box of the electrical control panel are tightened.

Yearly

This planning refers to an average installation; there could be installations in which it may be

necessary to increase the frequency of some checks.

Current legislation may require considerably longer intervals on periodic checks than the

recommended ones, also in reference to the safety devices installed and to the refrigerant charge

present, without causing the warranty on the unit to be voided.

Содержание FC2

Страница 1: ...l Rooftop Packaged Unit R 32 rooftop series Base 2 3 and 4 damper versions Made To Stock models UATYA BBY1 UATYA BBC2Y1 UATYA BBC3Y1 Made To Order models BASE FC2 FC3 RS4 Installation use and maintenance manual Rooftop Packaged Unit English ...

Страница 2: ......

Страница 3: ...on 15 2 2 5 Warnings concerning flammable refrigerants 16 2 3 Noise 22 2 4 Residual risks 22 2 5 Safety information on the refrigerant fluid 23 2 5 1 Hazards and health consequences 23 3 Receiving the product and storage 24 3 1 Reception 24 3 2 Transport 24 3 3 Handling 25 4 Product description 27 4 1 Intended use 27 4 2 Unintended use 27 4 3 Control and safety devices 28 4 4 Principles of operati...

Страница 4: ... 3 Condensate drain of the external air coil 38 5 4 4 Connection to the humidifier 38 5 5 Electrical connections 39 5 6 Aeraulic connections 41 5 6 1 Return and supply ducts 41 5 6 2 Connection of the ducts 42 6 Commissioning 43 6 1 Preliminary operations 43 6 2 First starting 44 6 2 1 Preliminary checks 44 6 2 2 Functional tests 44 6 3 Calibration of safety components 45 6 4 Checks during operati...

Страница 5: ...Translation from original instructions Packaged Rooftop 5 We reserve the right to make changes without any prior notice UATYA 4P645202 1 8 Decommissioning 54 ...

Страница 6: ...nts of the European Machinery Safety Directive The quality level is constantly monitored and therefore our products are synonymous with Safety Quality and Reliability Changes considered necessary for product improvement may be made to the stated data at any time without any obligation to give prior notice Thank you again Read this manual carefully before installing testing or starting this unit Gi...

Страница 7: ...rectives see the declaration of conformity that is an integral part of the manual 1 2 Description 1 2 1 Symbols A description of the main symbols used in this manual and on the labels affixed to the unit is given below Danger symbol take extreme care Danger symbol moving mechanical parts Danger symbol live parts Warning symbol important information Note symbol suggestions and advice Danger sign fl...

Страница 8: ... and so on are shown on the labels affixed to the unit the following illustrations are shown only as an example The Manufacturer adopts a continuous development policy and in this perspective reserves the right to make changes and improvements to the documentation and to the units without prior notice The Technical Catalogue the labels placed directly on the unit and the various diagrams referred ...

Страница 9: ... legislations and with respect to europen standards by EN 378 4 and EN 13133 additionally they must have proper knowledge to perform all the activities required throughout the service life of the machine Access to the unit requires that the closing panels where fitted are removed On no account must unqualified personnel be allowed to enter the unit and no one should be allowed to enter before the ...

Страница 10: ...quirements and or national regulations lay down that the discharge of the safety valves must be routed to the outside The conveying must be done with a pipe whose diameter must be at least that of the valve outlet and the weight of the pipe must not be borne by the valve Always direct the discharge to areas where the jet cannot cause harm to anyone Risk of burns following contact with hot and cold...

Страница 11: ...e safety valves if the units are positioned in unprotected places which can easily be reached by unqualified persons suitable protection devices must be installed the user must consult the installation and use system manuals incorporated and attached to this manual there may be potential risks that are not obvious Warnings and signals are therefore displayed on the unit Do not remove the warnings ...

Страница 12: ... 2 Circuit 1 Circuit 2 UATYA25 7 20 7 8 3 24 4 UATYA30 10 29 6 11 3 33 5 UATYA40 12 35 5 13 7 40 6 UATYA50 15 44 4 17 50 4 UATYA60 18 53 3 21 62 UATYA70 18 53 3 21 62 UATYA80 23 68 1 26 9 79 6 UATYA90 24 71 1 28 83 UATYA100 28 82 9 32 3 95 7 UATYA110 30 88 8 34 7 102 8 UATYA120 36 106 6 41 2 122 1 UATYA140 19 19 56 3 23 1 23 1 68 4 UATYA150 19 19 56 3 23 1 23 1 68 4 UATYA160 23 23 68 1 27 9 27 9 8...

Страница 13: ...gerant detection system has reset Building fire and smoke systems may override this function If the leak detector detects a leak the above operations will be initiated even if the unit is turned OFF by button by BMS or by digital input In addition to what above another dedicated relay is present in the unit electrical cabinet and connected directly to the leak detector alarm This relay can be used...

Страница 14: ...and return if present fan control in order to set a constant airflow logic with a fix airflow value This in order to not let the airflow to go below Qmin as defined in the paragraph Limit to the use Minimum area required and maximum refrigerant charge The fans will operate continuously even if time tables are set in order to have always the minimum required airflow In the unlike event that the air...

Страница 15: ...tal hardness 2 0 6 0 f Langelier index 0 4 0 4 pH 7 5 8 5 Electrical conductivity 10 500 µS cm Organic elements Hydrogen carbonate HCO3 70 300 ppm Sulphates SO42 50 ppm Hydrogen carbonate Sulphates HCO3 SO42 1 Chlorides Cl 50 ppm Nitrates NO3 50 ppm Hydrogen sulphide H2S 0 05 ppm Ammonia NH3 0 05 ppm Sulphites SO3 free chlorine Cl2 1 ppm Carbon dioxide CO2 5 ppm Metal cations 0 2 ppm Manganese ion...

Страница 16: ...continuously operating ignition sources for example open flames an operating gas appliance or an operating electric heater Do not pierce or burn Be aware that refrigerants may not contain an odour Annex DD 3 3 Qualification of workers Any operation concerning the installation maintenance repair disassembly and dismantling of the unit shall be carried out by qualified personnel in accordance with A...

Страница 17: ...re of potentially toxic and flammable atmospheres Ensure that the refrigerant or leak detection equipment being used is suitable for use with the refrigerant applicable to the unit i e non sparking adequately sealed or intrinsically safe Annex DD 4 6 Presence of fire extinguisher If any hot work is to be conducted on the unit requiring an increase in the temperature of parts of the unit e g brazin...

Страница 18: ...erant containing components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded Annex DD 4 10 Checks to electrical components Repair and maintenance to electrical co...

Страница 19: ...k that cabling will not be subject to wear corrosion excessive pressure vibration sharp edges or any other adverse environmental effects The check shall also take into account the effects of ageing or continual vibration from sources such as compressors or fans Annex DD 8 Detection of flammable refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or ...

Страница 20: ...edures In addition to conventional charging procedures the following requirements shall be followed Ensure that contamination of different refrigerants does not occur when using charging equipment Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them Cylinders shall be kept in an appropriate position according to the instructions Ensure that the refri...

Страница 21: ...at the correct number of cylinders for holding the total system charge are available All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant i e special cylinders for the recovery of refrigerant Cylinders shall be complete with pressure relief valve and associated shut off valves in good working order Empty recovery cylinders are evacuated and if pos...

Страница 22: ...ate to the ON state and vice versa of the unit can be carried out remotely or through the display without having to enter areas at risk Access restriction is part of correct installation to eliminate residual risks during normal operation Removal of the restrictions gives access to cold parts hot parts and sharp edges When the electrical boxes and the electrical control panel are open live parts c...

Страница 23: ... In case of contact with the liquid defrost the various part with water remove clothing carefully rinse thoroughly with water Contaminated clothing and shoes should be washed before reuse High vapour concentrations can cause headaches dizziness drowsiness and nausea and may lead to unconsciousness and cardiac arrhythmia If inhaled move the victim to fresh air Artificial respiration and or oxygen m...

Страница 24: ...the factory using suitable vehicles with correct locking in order to prevent any possibility of movement whilst in transit by road that may damage it or cause accidents If there is to be trans shipment to other vehicles to continue the journey it is essential to adopt all necessary measures for ensuring the correct safety conditions with regard to the vehicles used and the anchorage in order to pr...

Страница 25: ...g points Make sure the machinery and lifting ropes are of suitable size and capacity and strictly follow their operating instructions Use only equipment that is in excellent working order Check that the lifting equipment is of suitable size and capacity and strictly follow its operating instructions Use only equipment that is in excellent working order All work on the unit including unpacking and ...

Страница 26: ...otice UATYA 4P645202 1 For lifting use all the brackets present in the unit Fig 3 Lifting with slings To prevent the slings from touching the unit suitable protective devices must be placed on the upper edges It is mandatory to use a lifting beam adjusted to the width of the unit in order to ensure lifting stability ...

Страница 27: ...ariability can be characterized by high latent loads and need to guarantee optimum conditions for occupants Their use is recommended within the operating limits indicated in the Technical Catalogue 4 2 Unintended use The unit must not be used in an explosive atmosphere in a flammable atmosphere in extremely dusty environments in an environment that is not compatible with the stated IP protection r...

Страница 28: ... recovery from expelled air thermodynamic recovery humidification additional heating by means of burner battery with hot water or electric heaters free cooling free heating 4 5 Structure Depending on the sizes the structure is made of galvanized sheet iron coated with epoxy polyester powder at 180 C which makes it highly resistant to weather conditions or of extruded aluminium alloy profiles conne...

Страница 29: ...rm signalling which includes thermal overload protection overcurrent undervoltage absence of one or more phases and seized rotor The EC fans are not provided with a contactor and are constantly live as soon as the main disconnect switch of the unit is closed 4 7 2 Flow rate sensor for fans Units with EC fans are provided with a differential pressure transducer that detects the pressure difference ...

Страница 30: ...the indication for access to the filters Cleaning or replacement is essential to ensure good operation of the unit and the correct air flow rate 4 7 5 Humidifier The units can be equipped with an immersed electrode humidifier according to the model version Before use make sure all electrical and hydraulic connections have been made Should it be necessary to carry out maintenance or replace the hum...

Страница 31: ...back by one level A click on this icon enables going back to the loop of the previous menu gaining access to it with the active credentials 4 8 1 Switch the unit on and off from the display Use the On Off icon on the main screen to go to the page where the buttons to start and stop the unit are featured The top area of the screen shows the status of the unit the On Off icon is provided in the cent...

Страница 32: ...age becomes active as soon as it is selected 4 8 6 Change date and time Select Date and Time in the Configurations menu and access the screen where it is possible to edit the date and time setpoints Select the write icon in the bottom right hand side to access the edit screen When a green value is tapped a virtual keypad appears use the keypad to set the new values After entering the new value tic...

Страница 33: ...ing winds Do not position the unit in a such way that prevailing winds can cause air recirculation at the condensing coil type of surface Do not position the unit on dark coloured surfaces e g tarred surfaces so as to avoid overtemperatures during use possible reflections resonances and acoustic interactions with elements outside the unit Pay attention to the presence of flues drains vents and to ...

Страница 34: ...ioning A solid base on which to position the unit must be created This base must be perfectly flat and horizontal Its dimensions must be adequate for those of the unit The slab must be made in a suitable foundation about 15 20 cm higher than the surrounding ground flat horizontal and able to bear at least 4 times the operating weight of the unit at least 30 cm longer and wider than the unit Althou...

Страница 35: ...screws provided repeat this operation for all the elements of the guard 5 3 3 Anti vibration mounts In order to reduce vibrations transmitted to the structure it is advisable to install the unit on rubber or spring anti vibration mounts supplied as an accessory and to be requested when placing the order The dimensional diagram with footprint shows the position and load of each anti vibration mount...

Страница 36: ...ny work done to soundproof the unit does not affect its correct installation or its correct operation That is why it is necessary not to restrict the service spaces and to avoid installing covers that create recirculation between air supply and intake 5 3 5 Minimum distances The service spaces to comply with are shown on the dimensional drawings attached to the documentation of the unit It is esse...

Страница 37: ...circuit when it is not being used If a water and glycol mixture is not used the hydraulic system must be emptied whenever it is to remain unused for a long time To make the circuit emptying operations easier there is a drain valve on the underside of the manifold that feeds the hot water coil This manifold also has an air valve at the top that can be used to eliminate any air pockets there may be ...

Страница 38: ...ay The condensate drain of the external air coil can be left free Any condensate pipework connected to the unit must be protected from freezing 5 4 4 Connection to the humidifier Where present the humidifier must be supplied with untreated mains water preferably filtered from impurities and or waste The diameters of the couplings are reported in the dimensional drawings We recommend that the drain...

Страница 39: ...nit voltage number of phases frequency stated on the plate on the unit The standard supply voltage see specific wiring diagram must not fluctuate by more than 10 and the unbalance between phases must always be less than 2 The control circuit power supply is taken from the power line via a transformer situated in the electrical control panel the control circuit is protected by fuses Make sure the p...

Страница 40: ...is wrong the relay is open The red led blinking quickly with a short pause togheter with the green led lighted means that the supply voltage is out of the limits the relay is closed The red led blinking slowly means that the alarm due to the low voltage is active the relay is open The red led continuous light means that the alarm due to the over voltage is active the relay is open Fig 11 Phase seq...

Страница 41: ...lable pressure provided by the fans for particular applications consult our Technical Department The ducts connected to the appliance shall not contain any potential ignition source as defined by IEC 60335 2 40 2018 5 6 1 Return and supply ducts The units have provision for various connections of both the return duct and the supply duct To identify these refer to the dimensional drawing present in...

Страница 42: ...e machine made in accordance with the rules of good practice the ducting must be connected to the unit by interposition of an anti vibration coupling in order to reduce transmission of vibrations from the unit to the ducting always seal the joints so as to prevent air escaping from the channels if the noise transmitted by the machine through the channels needs to be considerably reduced these must...

Страница 43: ...in the compressor crankcases are powered correctly The crankcase heaters are switched on when the main disconnect switch is closed and this must be done at least 12 hours before starting the unit To check that the heaters are working correctly check that the lower part of the compressors is hot and in any case at a temperature of 10 15 C above ambient temperature Check that any sensors supplied wi...

Страница 44: ...alue Higher values indicate an excessive air flow rate that if it continues can cause the electrical protection devices of the motors to cut in Check that the values measured by the sensors of the control temperatures pressures correspond to the real values The unit automatically controls the ventilation airflow check on the unit display that the desired setpoint has been reached Lower readings of...

Страница 45: ...rical absorption of the unit is close to the data shown in the wiring diagram Considerably different values may be due to the reduced capacity operation of the unit to working conditions very different from the nominal ones or to the malfunctioning of one or more components that the difference between the condensing temperature of each circuit and that of the air is less than 25 C If it is greater...

Страница 46: ...the auxiliary circuit are undamaged Reset the triggered protective device after eliminating the cause that triggered it The unit does not start the display is off the control is powered correctly The unit is switched off from the display and the display is disconnected or not working Restore the connection of the display or replace it The unit does not start the display is off the control is power...

Страница 47: ...the valve due to failure of the protective devices to operate Check that the high pressure switches are working and if necessary replace them The valve must be replaced Opening of the valve due to overtemperature Replace the valve and restore the charge Water leaks from the pump on first start up Bedding in the mechanical seal Pressurize the pump body 2 or 3 times by closing and opening the delive...

Страница 48: ...ary to turn the unit off by means of the control switch disconnect the power supply using the switch general switch of the unit drain the hydraulic system unless it uses glycol water empty and clean the condensation drip tray empty the humidifier cylinder if present Check that fresh and exhaust air dampers if present on the unit are completely closed This case record can in fact be traced back to ...

Страница 49: ...ot access moving parts without guards In units with capacitors and or inverters certain components can remain live for several minutes even after having turned off the main switch Wait 10 minutes before working on the electrical parts of the unit Circuits supplied from external sources made with orange cable can remain live even after the power supply to the unit has been turned off Work on the un...

Страница 50: ...For units installed in coastal or industrial areas or in areas where there are aggressive chemicals in the air periodic rinsing with clean water is considerably beneficial and helps counter corrosive effects Never clean the coils with chemicals water containing bleach or acid or basic detergents These detergents can be difficult to rinse off and could accelerate corrosion on the joint between pipe...

Страница 51: ...nstallation site clean and tidy for correct maintenance of the unit and to keep it in good working order 7 3 1 Cleaning the unit Keep the inside of the electrical control panel and where present the compressor compartment clean After working on the unit always clean the electrical control panel of any work remnants and extraneous components Restore the safety devices and protective devices that ha...

Страница 52: ... Monthly Check that the differential water pressure switch or the flow switch where present is working correctly Monthly Check the crankcase heaters of the compressors Monthly Clean the finned coil by following the instructions in the External cleaning section according to the type of coil installed 3 months Clean the air filters Monthly Clean the ventilation filters of the electrical control pane...

Страница 53: ...he unit on the pipes or on parts of the unit can be a sign of gas leaks Repair the leakage point and restore the charge of refrigerant gas In the case of small oil leaks clean the dirty parts with absorbent cloths otherwise recover the leaked oil with absorbent sheets In any case the material used must be disposed of in accordance with current rules and regulations Check whether it is necessary to...

Страница 54: ...ms as required by local regulations The owner can return EEE to the dealer at the end of its life when purchasing equivalent new equipment This EEE may contain hazardous substances such as refrigerant gases lubricating oils and accumulators or other materials and improper or incorrect disposal of them may have adverse effects on human health and the environment Incorrect disposal of them also enta...

Страница 55: ......

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