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Swegon BlueBox Geyser Sky Manual
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Swegon BlueBox Geyser Sky Manual

Swegon BlueBox Geyser Sky Manual

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Geyser Sky
EN
Installation, use and maintenance manual
18-10-2024

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Summary of Contents for Swegon BlueBox Geyser Sky

  • Page 1 Geyser Sky Installation, use and maintenance manual 18-10-2024...
  • Page 2 THANK YOU Thank you for choosing our product. It is the result of many years’ experience and careful design and has been built with first-class quality materials and advan- ced technologies. Declaration of conformity also guarantees that the equipment meets the requirements of the European Machinery Safety Directive.

  • Page 3: Table Of Contents

    Contents Introduction Conformity Description 1.2.1 Symbols 1.2.2 Labels Safety General safety precautions 2.1.1 Discharge of the safety valves present on the refrigeration circuit 2.1.2 Atex cable glands 2.1.3 Emergency stop 2.1.4 Double safety valve option Basic rules 2.2.1 Water flow rate at the heat exchangers 2.2.2 Water composition 2.2.3...
  • Page 4 Product description Intended use Unintended use Control and safety devices Principles of operation Structure Specifications Control panel 5.7.1 Home page and icons 5.7.2 Switch the unit on and off from the display. 5.7.3 Switch the unit on and off from external OK signal 5.7.4 Change of set points 5.7.5...
  • Page 5 7.2.3 Functional tests System testing 7.3.1 Flowzer VP 7.3.1 Flowzer DT 7.3.2 Flowzer DT 7.3.4 Flowzer VDE 7.3.5 Flowzer VD 7.3.6 Flowzer VFPP 7.3.7 Flowzer VPS 7.3.8 Starting a unit with DHW accessory 7.3.9 Start-up of unit featuring 3-way valve option for two-zone control Calibration of safety components Checks during operation Alarms and malfunctions...

  • Page 6: Introduction

    INTRODUCTION 1.1 Conformity With regard to relevant regulations and directives, 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;...

  • Page 7: Labels

    1.2.2 Labels For the constructional features, available models and technical data, please refer to the Technical Catalogue. The model, serial number, features, power supply voltage and so on are shown on the labels affixed to the unit (the following illustrations are shown only as an example). The unit model, serial number, specifications, power voltage etc.

  • Page 8: Safety

    SAFETY 2.1 General safety precautions Access to the area around the unit must be prevented by special guarding where this is positioned in a location that is not protected and can be reached by unqualified persons. The equipment operator is responsible for complying with regulatory obligations. The equipment operator is the person who has actual control over the technical operation and free access, which means the possibility of monitoring its components and their operation and the possibility of granting access to third parties.
  • Page 9 Before work is started on the unit: check for potentially flammable atmospheres; Make sure there are no possible ignition sources Adhere to the requirements set by the local legislation and by European standards EN378-4 and EN13313. In units with capacitors and/or inverters, certain components can remain live for several minutes even after having turned off the main switch.

  • Page 10: Discharge Of The Safety Valves Present On The Refrigeration Circuit

    2.1.1 Discharge of the safety valves present on the refrigeration circuit The refrigeration circuit is always equipped with a safety valve(s) which is/are conveyed flush with the machine. The exit point and connection characteristics are indicated on the dimensional diagram of the unit. Fig.

  • Page 11: Atex Cable Glands

    2.1.2 Atex cable glands Cables are run into the electrical cabinet and the junction boxes of the electrically-controlled actuators in the unit by means of Atex-certified cable glands. The installed cable glands are ingress protection IP65, including II 2GD marking, protection type Ex eb IIC Gb.

  • Page 12: Double Safety Valve Option

    2.1.4 Double safety valve option When they are released from the factory, the shut-off elements in the safety valves, if any, are open and protected by a tamper-proof seal. When the DSV (Double Safety Valve) option is featured, the shut-off elements in the safety valves are set up in the factory in such way that a safety valve is open and the corresponding backup valve is closed.

  • Page 13: Basic Rules

    2.2 Basic rules All units are designed and manufactured in accordance with the applicable European Directives that are referenced in the declaration of conformity. To ensure maximum safety, in order to prevent possible risks, follow the instructions below: - this product contains pressurised vessels, live components, moving mechanical parts and very hot and cold surfaces that, in certain situations, can pose a risk: all maintenance work must be carried out by skilled personnel equipped with the necessary qualifications in accordance with current regulations.

  • Page 14: Water Flow Rate At The Heat Exchangers

    2.2.1 Water flow rate at the heat exchangers It is necessary to ensure that the water flow rate during operation is no higher than 1.5 times and no lower than 0.5 times the nominal flow rate of the unit stated in the Technical Catalogue. In any case, refer to the specific Technical Catalogue for the allowed conditions for water flow in and out of the exchangers.

  • Page 15: Minimum Water Content In The System

    2.2.3 Minimum water content in the system For correct operation of the unit, it is necessary to ensure a buffering on the system such as to comply with the minimum operating time considering the greater between the minimum OFF time and the minimum ON time. In short, these contribute to limiting the number of times the compressors are switched on per hour and to preventing un- desired deviations from the set point of the delivered water temperature.

  • Page 16: Installing The Flow Switch

    2.2.4 Installing the flow switch The units are supplied with a differential pressure switch fitted between the inlet and the outlet of the water exchanger. A flow switch, that must be connected by the installer, can be supplied as accessory. The flow switch supplied has a 1” male fitting The unit must be installed following the arrow that shows the direction of flow.

  • Page 17: Operation With Water To The Exchanger At Low Temperature

    2.2.6 Operation with water to the exchanger at low temperature With temperatures below 5°C, it is mandatory to work with water and anti-freeze mixtures, and also change the safety devi- ces (anti-freeze, etc.), which must be carried out by qualified authorised personnel or by the manufacturer. The glycol percentage by weight is determined based on the desired temperature of the chilled water (see table). Minimum ambient temperature or liquid outlet temperature (°C) Freezing point (°C)

  • Page 18: Refrigerant Leak Detector

    2.2.8 Refrigerant leak detector A refrigerant leak detector with an IR sensor is installed on the units. This device is designed to immediately detect any refrigerant leakage. When 10% LFL is exceeded, the detector enables ventilation in the technical compartment and ventilation in the electrical panel (where it is not enabled yet); additionally, it closes one alarm potential free contact and finally it cuts out power to the electrical panel by means of a specific circuit breaker, except to the side where the detector power connectors are located.

  • Page 19: Safety Potential Free Contacts

    2.2.9 Safety potential free contacts The terminal board is fitted with safety potential free contacts, in addition to the lights installed on the door of the electric panel that warn about operation of the refrigerant leak detector. The contacts are activated to warn about the following alarm conditions: •...

  • Page 20: Noise

    2.3 Noise The starting of the unit, with activation of its components, emits a noise whose intensity varies depending on the operating level. The correct location choice and the correct installation prevent the unit causing annoying noise due to resonances, reflections and vibrations.
  • Page 21 Safe area when installed opposite a wall 0,3 m 1,5 m The unit must be installed at least 0.3 metres away from the wall on the exchanger side. Neither doors nor windows (“D” and “W” in the picture) must be present in Atex zone 2. In a “zone 2”: - installation of equipment unsuitable for use in such potentially explosive zones must be avoided (the minimum equip- ment requirements are: 3G IIA T2);...

  • Page 22: Safety Information On The Refrigerant Fluid

    2.5 Safety information on the refrigerant fluid This product is filled with a flammable natural gas (hydrocarbon), classified as A3 under ISO 817. Type of refrigerant: R290. GWP value: 3. Based on "IPCC Fifth Assessment Report". GWP is the global warming potential. The quantity of refrigerant fluid is indicated in the unit’s data label. Periodic inspections are necessary to check for refrige- rant fluid leaks in accordance with local and/or European regulations.

  • Page 23: Receiving The Product And Storage

    RECEIVING THE PRODUCT AND STORAGE 3.1 Reception On receiving the unit, check that it is undamaged, bearing in mind that it left the factory in perfect condition. Report any signs of damage immediately to the transporter and make a note of these on the Delivery Sheet before signing The relevant sales department or the manufacturer should be informed of the extent of the damage as soon as possible.

  • Page 24: Non Tradotto

    N.N **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** N **non tradotto** Translation from original instructions We reserve the right to make changes without any prior notice.

  • Page 25: Non Tradotto

    **non tradotto** **non tradotto** **non tradotto** N **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** N.N **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** **non tradotto** We reserve the right to make changes without any prior notice. Translation from original instructions...

  • Page 26: Ecodesign Conformity

    ECODESIGN CONFORMITY 4.1 Documentation supplied with the product Listed below are the documents supplied with the machine according to its type, with particular reference to conformity with Directive 2009/125/EC of the European Parliament and of the Council, of 21 October 2009, regarding the establishment of a framework for drafting specifications for the eco-friendly design of energy-related products, and relevant Regulations (hereinafter "Ecodesign").

  • Page 27: Partly Completed Machine

    4.1.3 Partly completed machine Units for which conformity with the Ecodesign Directive must be related to a 'partly completed machine plus remote heat exchanger' system. Otherwise, the unit conforms to all EC requirements. All the points described in the first paragraph apply, with the exceptions stated below. The EC Declaration is not accompanied by Attached Documents Conformity with the Ecodesign Directive depends on the combination of partly completed machine plus remote heat exchan- ger and is therefore the responsibility of the person who makes the selection and combination at the installation stage.

  • Page 28: Conformity Of The Application

    4.2 Conformity of the application The applications allowed as regards the documentation supplied with the unit are indicated below. This applies only in the case of units intended for installation and operation in the European Union. The customer is required to select the unit with regard to the expected operating condition and the Ecodesi- gn conformity required for that condition.

  • Page 29: Product Description

    PRODUCT DESCRIPTION 5.1 Intended use These units are made for heating/cooling the heat-carrying fluid and are generally used in air conditioning applications. There is a DHW accessory for the domestic hot water circuit. When the DHW accessory is present, operation on domestic hot water circuit has priority over that of the system. With reference to plant management, the unit can control two zones having different temperatures.

  • Page 30: Control And Safety Devices

    5.3 Control and safety devices The unit is integrally managed by an electronic microprocessor control that, through the various temperature and pressure sensors installed in the unit, keeps its operation within the safety limits. All the parameters involved with control of the unit are shown in the “Control Manual” that is an integral part of the docu- mentation of the unit.

  • Page 31: Control Panel

    5.7 Control panel The unit is fully managed by an electronic system with microprocessor that has a touch screen display as interface. By using the display, you can access all the unit’s functions, such as visualising the operating parameters, setting the para- meters, managing and analysing any problems.

  • Page 32: Switch The Unit On And Off From The Display

    Below is the list of the icons that are always featured in the Home page. The icon “User Menu” gives access to the screen where the following icons are always featured: “Alarms Hi- story”, “Video display”, “Network”, “File Management”, and “Refrigerant circuit”. The icons “Flowzer”, “DHW” and “2 Zones”...

  • Page 33: Time Band Setup Procedure

    5.7.5 Time band setup procedure The “User Menu” icon enables a drop-down menu where all the function icons are featured. When the “Time bands” icon is pressed, access is given to the screen where the time bands are enabled and set up. The right arrow icon “Set Schedule”...

  • Page 34: Installation

    INSTALLATION During installation or whenever work must be carried out on the unit, it is essential to strictly follow the instructions in this manual, comply with the directions on the unit and in any case take all necessary precautions. The high flammability of the refrigerant gas used, the pressures in the refrigerant circuit and the electrical components fitted can create risky situations during installation and maintenance work.
  • Page 35 The unit is filled with flammable refrigerant gas, classified as A3. The unit must be installed in an area from which any leaking refrigerant cannot flow into buildings or cannot harm persons or damage property. Similarly, should a refrigerant leak occur, the refrigerant must be prevented from flowing into fresh air inlets, doors or similar openings, and it must be prevented from building up under any walking surface and inside trap-doors.

  • Page 36: Installation

    6.3 Installation The units are shipped from the factory already tested and only need electrical and hydraulic connections for installation. 6.3.1 External positioning 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;...

  • Page 37: Noise Attenuation

    6.3.3 Noise attenuation The units are designed and built paying particular attention to keeping down noise emission during operation. Correct installation for both the place and the components, as shown in the relevant chapter, prevents resonances, reflections and vibrations that can be particularly bothersome. If, after following the instructions above, further attenuation is required, the use of acoustic barriers is a valid solution.

  • Page 38: Hydraulic Connections

    6.4 Hydraulic connections For the implementation of the hydraulic circuit (refer to the diagrams included in the manual) it is good practice to comply with the following instructions and, in any case, to follow national or local regulations. Fit the pipes to the unit using flexible couplings in order to prevent transmission of vibrations and compensate thermal expansion.
  • Page 39 If fitted, open type expansion vessels must be installed outside the unit. If they are already installed in the unit, they must be moved outside or they must be replaced with hermetic type vessels. Outdoor installation always requires the fitting of safety valves. It is mandatory to instal mechanical vents outdoor.

  • Page 40: Dhw Accessory

    6.4.1 DHW accessory Also, for units where the DHW accessory is present: - install the 3-way valve as shown in the recommended hydraulic diagram; - check that the domestic hot water storage tank has a pocket at the top for insertion of the relevant operation probe; - if the circulation pump is not installed on the unit, check that it is correctly installed as shown in the recommended hy- draulic diagram.

  • Page 41: 2-Zone Control With "Git Option

    6.4.2 2-zone control with “GIT option” The unit is designed to control two zones in the plant having different temperatures for the sake of comfort. The two zones can be controlled using either one or two 3-way modulating valves. When only one 3-way valve is used, the directly connected zone is fed with water at the temperature produced by the unit. As water is recycled, the area controlled using the 3-way valve can be fed with water at a different temperature.
  • Page 42 Below is a description of the reference acronyms used in the hydraulic diagrams. BT1 = Input water temperature probe BT2 = Output water temperature probe Bfc = Water temperature probe in fan coil system Bfh = Water temperature probe in floor-mounted system FC = Fan coil system FH = Floor-mounted system P1 = Pump installed in unit...

  • Page 43: Condensate Drain

    6.4.3 Condensate drain All the units are equipped with a condensate drip tray featuring an electric heater. Each tray has a 1” gas male connector that is used for drainage. If the drain is further extended for the purpose of conveying water, the pipes must be prevented from freezing. If refrigerant leaks from the condensing/evaporating coils, it may flow out through the condensate drain pipes.

  • Page 44: Oversized Anti-Freeze Heater For Condensate Drip Tray

    6.4.4 Oversized anti-freeze heater for condensate drip tray The condensate dip trays may be supplied, as option, with an oversized heater. The oversized heater is used to prevent the formation of ice at the base of the air exchanger in especially critical installations. The figure shows a section view of the condensate drip tray, including a standard heater (A) and an oversized heater (B).

  • Page 45: System Components

    6.5 System components 6.5.1 Installation of pressure sensors If the operating logic requires the installation of pressure sensors in the system, the Manufacturer supplies a kit of measu- ring devices to be assembled by the fitter. The kit consists of: - 2 pressure sensors;...

  • Page 46: Installation Of Temperature Sensor

    6.5.2 Installation of temperature sensor If the operating logic requires the installation of a temperature sensor in the system, the Manufacturer supplies the neces- sary kit to be assembled by the fitter. The kit consists of: - 1 threaded probe pocket G1/2"; - 1 temperature sensor.

  • Page 47: Electrical Connections

    6.6 Electrical connections All electrical operations must be carried out by personnel having the necessary legal requirements, and trained and infor- med on the risks connected with these operations. The sizing and characteristics of the power lines and relevant components must be determined by staff qualified to design electrical systems, following the international and national regulations of the place of installation of the units in conformity with the regulations in force at the time of installation.
  • Page 48 Any cable must be run from outside the electrical control panel inside it only using cable glands that are suitable with the cable diameter. Any free cable glands provided in the electrical control panel are suitable for use. Each cable gland must be used for one cable only. Do not use sheaths in the cable glands. If you use a residual current device to protect the power line, in units with inverter, use type "B"...

  • Page 49: Commissioning

    COMMISSIONING 7.1 Preliminary operations Make sure the main disconnect switch is in the OFF position. In units fitted with anti freeze heaters, their power supply is mechanically locked. Operating conditions must be restored exclusively after the machine is totally filled with water. In units with pumps, their power supply is mechanically locked.

  • Page 50: Checking The Pre-Charge Of The Expansion Vessel

    The heaters in the compressor crankcase are switched on when the master disconnect switch is closed: 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.

  • Page 51: Checking The Volume Of The Expansion Vessel

    7.1.2 Checking the volume of the expansion vessel As the pre-charge pressure increases, the maximum volume of the system supported by the expansion vessel supplied as standard, decreases. where - VI: volume of the system supported by the expansion vessel [l] - VVE: volume of the expansion vessel [l] - Ce: expansion coefficient of water - pVE: pre-charge pressure of the expansion vessel [barg]...

  • Page 52: First Starting

    7.2 First starting When the unit is started for the first time, some important tests and checks must be done. The unit must be started up for the first time by trained personnel from authorised service centres. The electrical cabinet must be opened exclusively after checking for refrigerant in the air with the help of a gas detector.

  • Page 53: Functional Tests

    7.2.3 Functional tests With the starting of the unit, a few seconds after the starting of the pump, if managed by the control, the compressors will start according to the request of the thermoregulation. Check that bubbles do not appear at the liquid sight glass. The continuous passage of bubbles can indicate there is insuffi- cient refrigerant and it needs to be topped up.

  • Page 54: System Testing

    7.3 System testing Specific logics have been developed according to which the controller manages the hydraulic systems connected to the unit. The management logics are intended to increase system efficiency and save energy for water circulation at the same time. With the help of these logics, the circulating water fulfils the demands of the system, without exceeding the design flow rate limits and without jeopardising correct operation of the cooling unit.

  • Page 55: Flowzer Dt

    7.3.1 Flowzer DT 7.3.2 Flowzer DT The “DT” function is designed to change the pump speed in order to have a constant temperature difference between the unit inlet and outlet. The resulting effect is that the temperature of water supplied to the system is constant. When the load is reduced, the water flow rate is reduced accordingly, which results in consumption saving.
  • Page 56 7.3.3.2 Setting the operating setpoint difference The units are shipped from the factory with a setpoint difference value of 5°C. Editing of the operating parameters requires entry of the Service credentials for access. The operating conditions are in any case visible also when access is gained from the “User menu”. The steps below must be performed to edit the factory value.
  • Page 57 - U1, U2 .. Un = points of use present in the system/plant - Y2V = 2-way valve servo controls - Y3V = 3-way valve servo controls - Vmin = minimum water volume in the system/plant - UL = limit of the supply. If the operating logic of the secondary circuit includes stopping of the water flow rate, the capacity of the buffer tank must be sized against the min.
  • Page 58 The abbreviations present in the diagram indicate: - A2 = cooling unit controller - BT1 = unit input temperature sensor - BT2 = unit output temperature sensor - EU = heat exchanger in cooling unit - BP41= differential pressure sensor; - ΔPex = pressure difference at the ends of the unit;...

  • Page 59: Flowzer Vde

    7.3.4 Flowzer VDE The “VDE” function is used to set the speed of the pump to such level that the pressure difference between the unit inlet and outlet is kept constant and the water flow rate is consequently kept constant. The speed of the pump is set automatically to preserve the desired flow through the heat exchanger in the unit. This function is useful when the head of the pump aboard the unit is greater than the system requires, which would result in a higher water flow circulating.

  • Page 60: Flowzer Vd

    7.3.4.1 Editing the operating pressure difference in the unit Editing of the operating parameters requires entry of the Service credentials for access. The operating conditions are in any case visible also when access is gained from the “User menu”. The steps below must be performed to edit the factory value. - select the “Access”...
  • Page 61 - U1, U2 .. Un = points of use present in the system/plant - Y2V = 2-way valve servo controls - Y3V = 3-way valve servo controls - Vmin = minimum water volume in the system/plant - UL = limit of the supply. This type of system requires that the min.

  • Page 62: Flowzer Vfpp

    7.3.6 Flowzer VFPP The “VFPP” function is designed to control variable flow systems to the primary circuit. The system keeps stable the difference in the water pressure and temperature in the system delivery line as the demand changes. The water flow rate and temperature are independent variables and not directly connected. Control of the “single pump in the system”...
  • Page 63 - Y3V = 3-way valve servo controls - Vmin = minimum water volume in the system/plant - UL = limit of the supply. When making the hydraulic circuit as shown in the diagram, attention must be paid to the following: - The two-way bypass valve supplied by the manufacturer must be installed between the delivery line and the return line of the system on a pipe having the same diameter as the connections of the unit.
  • Page 64 3. The ΔPp value reaches the required setpoint within the set differential, but the ΔPex value is lower than the value stored in parameter “PA22”. This means the water flow rate calculated by the system is lower than the required rated flow, as a result of which the ΔPp setpoint must be increased until the ΔPex parameter falls within the value range set in parameters “PA22”...

  • Page 65: Flowzer Vps

    7.3.7 Flowzer VPS The “VPS” function modulates the flow rate to the primary circuit following the flow of the secondary circuit, taking as re- ference the difference in the water temperature measured between the outlet of the primary circuit and the bypass pipe. Water flow rate control in the primary circuit always takes place within the limits set for correct operation of the refrigerant unit.
  • Page 66 7.3.7.1 Setting the operating setpoint difference The value stored in the operating temperature difference parameter, as set at the factory, is the result of our experience with different systems. An incorrect value will eventually reduce the setting efficiency. Editing of the operating parameters requires entry of the Service credentials for access. The operating conditions are in any case visible also when access is gained from the “User menu”.
  • Page 67 Letter “L” appears in the first screen of the Flowzer menu to indicate that the value ΔPex is lower than the setpoint stored in parameter “PA22”. If the value ΔPex is higher than the setpoint stored in parameter “PA55”, letter “H” appears in this position, instead of “L”. Flowzer VPS Status Regulation 7.1 °...

  • Page 68: Starting A Unit With Dhw Accessory

    7.3.8 Starting a unit with DHW accessory The above description regards the starting of water production for the air conditioning system. After making sure the position of the 3-way valve allows correct water circulation, start the operation of the domestic hot water circuit. Start domestic hot water production by acting on the user interface of the control. Operation starts only if there is a domestic hot water temperature regulation request for hot water production.

  • Page 69: Calibration Of Safety Components

    7.4 Calibration of safety components Any work on the unit must be carried out by qualified authorised personnel. Incorrect calibration values can cause serious damage to the unit and harm people. The control and safety equipment is calibrated and tested in the factory before the unit is shipped. However, after the unit has been started, the safety devices must be checked (only the high pressure switches).

  • Page 70: Checks During Operation

    7.5 Checks during operation With the circuit operating at 100% and stable at working conditions near the nominal ones, check: - that the electrical 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, at working conditions very different from nominal ones, or to the malfunctioning of one or more components.

  • Page 71: Alarms And Malfunctions

    7.6 Alarms and malfunctions Possible malfunctions will trigger the protective devices and safety devices of the unit before serious faults occur. All the “warnings” and “alarms” are recorded in the memory of the control and displayed on the display of the unit. Before resetting an alarm, the cause that triggered it must be found and eliminated.
  • Page 72 SYMPTOM LIKELY CAUSE POSSIBLE SOLUTION Check that the air valves are not shut Abnormal noises on the hydraulic Presence of air in the system. off by valves. pipes. Vent the system. Check that the high pressure switches Opening of the valve due to failure of are working and, if necessary, replace Presence of oil on the discharge of the the protective devices to operate.

  • Page 73: Temporary Stop

    7.7 Temporary stop The stopping of the unit for a few hours in the day “during non-working hours” or for a few days “over the weekend” is con- sidered temporary. The unit must be stopped using the display of the control, the external OK signal or via serial if included. During the temporary stop, the unit must be powered correctly.

  • Page 74: Maintenance

    MAINTENANCE Unit filled with refrigerant classified as A3 (flammable) A refrigerant leak alarm identifies the potential forma- tion of flammable atmospheres. The electrical cabinet must be opened exclusively after checking for refrigerant in the air with the help of a gas detector.

  • Page 75: External Cleaning

    8.2 External cleaning The component of the unit that needs most care is the finned pack heat exchanger. It is essential to keep it clean and free of dirt and/or deposits that can hinder or prevent air flow. Regular cleaning of the surface of the coil is essential for the unit to work correctly and also increases the operating life of the exchanger and the unit.

  • Page 76: Internal Cleaning

    8.3 Internal cleaning It is essential to keep the installation site clean and tidy for correct maintenance of the unit and to keep it in good working order. 8.3.1 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.

  • Page 77: Cleaning The Plate Heat Exchangers

    8.3.2 Cleaning the plate heat exchangers Thanks to the generally very high level of turbulence, in plate heat exchangers, a self-cleaning effect takes place in the channels. However, in some applications the tendency to scaling and/or the formation of deposits in the heat exchanger can be very high (e.g.

  • Page 78: Periodic Checks

    8.4 Periodic checks Carry out periodic checks to make sure the unit is working correctly: Work on the unit must be performed exclusively after checking for refrigerant in the air, as a result of which a potentially flammable atmosphere may form. Unit filled with refrigerant classified as mildly flammable A2L or with flammable refrigerant A3, pursuant to ISO 817.
  • Page 79 These operations do not include work or adjustments on the refrigerant system and they do not require any specific know- ledge. They can be performed by adequately trained staff following the instructions given in this manual and the correct procedures defined by the existing regulations.
  • Page 80 The operations contemplated below must always be performed by qualified and authorised staff, pursuant to the provisions laid down in Directive EN378-4 and Directive EN22712; staff shall be duly trained on the test procedures, in compliance with all the required safety precautions. RECOMMEN- OPERATION DED FRE-...
  • Page 81 RECOMMEN- OPERATION DED FRE- QUENCY Check for abnormal vibration/noise or mechani- Visual and noise level inspection. Fix any malfunctioning part. cal malfunctions in the refrigerant circuit and its components, including pipes, valves, compressors, Contact the After-Sales Service dept. if you en- counter difficulties.
  • Page 82 RECOMMEN- OPERATION DED FRE- QUENCY Remove the filters from the unit and clean them If the unit features metal filters on the coils, clean with compressed air blown in the opposite direction 6(*) them. to the air flow during unit operation. Use a jet of water if they are completely clogged.
  • Page 83 RECOMMEN- OPERATION DED FRE- QUENCY Refrigerant leak detector reading test. Contact the After-Sales Service dept. Check that the cable glands in the unit are correctly Refer to the chapter “Atex cable glands”. tightened. Replacement of sensing element in refrigerant leak Contact the After-Sales Service dept.

  • Page 84: Logbook

    8.4.1 Logbook When the refrigerant charge exceeds 3 kg, a logbook shall be prepared upon installation of the system by the installer. In the logbook, at least the following information shall be recorded: - a) the details of the maintenance and repair works; - b) the quantities, kind of (new, reused, recycled, reclaimed) refrigerant which have been charged on each occasion, the quantities of refrigerant which have been transferred from the system on each occasion ( see also EN 378-4);...

  • Page 85: Unscheduled Maintenance

    8.5 Unscheduled maintenance After correctly starting-up and carrying out the relevant checks, the units normally do not need any intervention by the cu- stomer service in order to check the charge of the refrigerant gas. 8.5.1 Special work With use of the unit, particular situations may occur that require work to be carried out promptly. Even in an emergency, work on the unit must be carried out by skilled personnel in safe conditions.

  • Page 86: Decommissioning

    DECOMMISSIONING With reference to the European waste management directive, we inform you of the following: - The owner of electrical and electronic equipment (EEE) is obliged not to dispose of it as non-separated municipal waste, and must dispose of it via separate collection through public or private waste collection systems as required by local regulations.
  • Page 87 Page intentionally blank We reserve the right to make changes without any prior notice. Translation from original instructions...
  • Page 88 Via Valletta, 5 - 30010 Cantarana di Cona, (VE) Italy - T. +39 0426 921111 - F. +39 0426 302222 www.blueboxcooling.com - info@swegon.it Swegon Operations s.r.l. with sole shareholder - VAT no. 02481290282 Company directed and coordinated by Investment Latour (Sweden)