Alfa Laval AlfaNova 14-76, AXP AN, Instruction Manual

Page 1: ...Instruction Manual Fusion bonded plate heat exchangers AlfaNova 14 76 AXP AN EN 34566980 01 EN 2018 01 Original manual ...

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Page 7: ...B This document and its contents is owned by Alfa Laval Corporate AB and protected by laws governing intellectual property and thereto related rights It is the responsibility of the user of this document to comply with all applicable intellectual property laws Without limiting any rights related to this document no part of this document may be copied reproduced or transmitted in any form or by any...

Page 8: ...heat exchanger must be used in accordance with the specified configuration of material media temperatures and pressure for the specific plate heat exchangers Prior knowledge The plate heat exchanger must be operated by individuals who have studied the instructions in this manual and have knowledge of the process This includes knowledge of the precautions regarding media pressures the temperatures ...

Page 9: ...anty applies Storage of the plate heat exchangers Alfa Laval delivers the plate heat exchanger ready for operation unless agreed otherwise Keep the plate heat exchanger in the packing box until it is ready to be installed If there is any uncertainty with regard to the storage of the plate heat exchanger please consult an Alfa Laval Representative For longer storage periods keep the heat exchanger ...

Page 10: ... be mounted on demand Unpacking Packing material consists of wood plastics cardboard boxes and in some cases metal straps Packing materials can be reused recycled or used for energy recovery according to local legislations Disposal Heat exchangers must be recycled according to relevant local regulations Any hazardous residues from the process liquid must be considered and dealt with in a properly ...

Page 11: ... 3 and ports 4 Warning The heat exchanger must not be opened Name plates Warning The mechanical design pressures and temperatures are marked on the name plate These must not be exceeded The unit type manufacturing number and year along with the pressure vessel details in accordance with applicable pressure vessel code can be found on the name plate The name plate is fixed to the cover plate usuall...

Page 12: ...ions Lifting Warning Never lift only by the connections or anyb of the studs Use straps when lifting and place them according to the figure below Figure 2 Examples of lifting Note When using lifting lugs keep the angle of the straps as close as possible to 90 but never less than 60 Warning Be careful and keep clear of the heat exchanger during lifting to avoid personal injuries Document ID Languag...

Page 13: ...te Unless otherwise specified product data for normal refrigerants i e HFC and HCFC are applicable to refrigeration applications The manufacturer must be consulted before the heat exchanger is used for flammable toxic or dangerous liquids e g hydrocarbons Relevant safety rules must be followed for handling such liquids For further information please refer to the supplier s website Protection again...

Page 14: ...m lbf ft Fs kN lbf Mt Nm lbf ft 15 28 0 6 1 1 2 4 539 14 10 3 0 7 157 38 28 0 29 35 1 1 1 4 4 0 899 45 33 2 1 2 269 120 88 5 36 45 1 4 1 8 6 5 1461 110 81 1 2 5 562 240 177 0 46 55 1 8 2 2 7 0 1573 120 88 5 4 8 1079 440 324 5 56 76 2 2 3 0 12 0 2697 250 184 4 5 2 1169 600 442 5 77 99 3 0 3 9 13 0 2922 310 228 6 5 8 1303 1200 885 0 100 3 9 28 0 6294 800 590 5 8 1303 2500 1843 1 Shear force Fs is ca...

Page 15: ...e loads at installation Maximum tightening torques for the mounting bolts according to table below Bolt dimension Torque Nm lbf ft M5 2 3 1 7 M6 3 8 2 8 M8 9 5 7 0 M8 Extra small units 8 0 5 9 M10 19 0 14 0 M12 33 0 24 3 UNC 1 4 3 8 2 8 UNC 5 16 8 6 6 4 UNC 3 8 15 6 11 5 In a rigid pipe system small heat exchangers can be suspended directly in the pipework To avoid vibrations use anti vibration mo...

Page 16: ...me plate For vibration risks install anti vibration mountings as shown in picture for rigid pipe system in section Mounting at page 15 Normally the plate heat exchanger is connected so that the media flows through the plate heat exchanger in opposite directions in counter current flow and in most cases this provides the best heat transfer performance S4 S1 S3 S2 Take into account the risk of fire ...

Page 17: ...nside and outside of the pipe and if bevelled also the bevelled edge at least 25 mm from the pipe edge and inward Note Before connecting the heat exchanger to the system consider valve set up and access points for example to be prepared to perform cleaning Note Protect the heat exchanger from overheating by wrapping a piece of wet cloth around the connection while soldering or welding Installation...

Page 18: ...eat exchanger can pass the flow switch The low pressure switch should assure a minimum pressure drop of 5 10 kPa 0 73 1 45 PSI Heat exchanger with a refrigerant distribution system should be mounted with the distributor at the bottom Typical installation of single circuit S4 S1 S3 S2 S4 S1 S3 S2 A B 3 4 2 1 4 3 1 2 Figure 5 Single circuit A evaporator B condensor 1 Refrigerant inlet 2 Refrigerant ...

Page 19: ...as a wave at the speed of sound This can cause considerable damage to the equipment Step 1 Check that the inlet valve 2 is closed between the pump and the unit controlling the system flow rate Inlet valve 2 3 for both fluids should be closed the outlet valves 1 4 opened and the vent valve 5 6 closed 1 3 2 4 6 5 Step 2 If there is a outlet valve 4 make sure that it is fully open Step 3 Open the ven...

Page 20: ...ize connection loads during operation Protection against freezing Bear in mind the risk of freezing at low temperatures Plate heat exchangers that are not in operation should be emptied and blown dry whenever there is a risk of freezing Note To avoid damage due to freezing the medium used must include an anti freeze agent when operating conditions are below 5 C 41 F and or when the evaporating tem...

Page 21: ...ed so that the amplitude and frequency of the pressure variation are as low as possible Recommended limits for Chloride ions Cl at pH 7 5 1 2 Alloy 316 at 25 C 77 F 1000 ppm at 65 C 149 F 200 ppm at 80 C 176 F 100 ppm 1 Lower levels of chloride ions may cause corrosion due to other factors 2 Halogens e g bromides and flourides may also cause corrosion All components in contact with media are manuf...

Page 22: ...1 2 for the other medium media 4 If the plate heat exchanger is shut down for a long period it should be drained Also drain the heat exchanger if the process is shut down and the ambient temperature is below the freezing temperature of the media Depending on the media processed rinse and dry the heat exchanger and its connections Document ID Language Edition 22 Instruction Manual Fusion bonded pla...

Page 23: ...osure time and concentration of chlorine In every case where the chlorination of the plate heat exchanger cannot be avoided consult an Alfa Laval Representative for advice Cleaning In Place Cleaning In Place CIP equipment permits cleaning of the plate heat exchanger CIP performs By regular CIP the dissolution of fouling helps to restore the original thermal performance of the unit The passivating ...

Page 24: ...rosive cleaning liquids can cause serious injuries to skin and eyes For detailed information regarding Cleaning liquids and procedure refer to the CIP manual Rinse well with fresh water after cleaning Caution Make sure that the handling of residuals after using cleaning liquids follows the local environmental regulations Document ID Language Edition 24 Instruction Manual Fusion bonded plate heat e...

Page 25: ... see step 3 NO If the pressure drop corresponds to the specifications there is no need for action If the pressure drop is lower than specified the pump capacity is probably too small or the observation may be wrong See pump instruction manual Action 3 Check the thermometer readings Do the readings correspond to those specified Correction YES The heat transfer surface is probably clean enough but t...

Page 26: ...nt of heat energy corresponds to the specifications If great precision is important it will be necessary to use laboratory thermometers with an accuracy of 0 1 C and also to use the best equipment available for flow measurement Has the heat transfer capacity of the unit dropped below specified values Correction YES Clean the heat transfer surface Use the Cleaning In Place CIP system NO Document ID...