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Armfield FT74XA Instruction Manual

Htst/uht heat exchanger processing unit
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Instruction Manual
FT74XA HTST/UHT Heat
Exchanger Processing Unit
Issue 18
March 2024
:
PC-0071422

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Summary of Contents for Armfield FT74XA

  • Page 1 Instruction Manual FT74XA HTST/UHT Heat Exchanger Processing Unit Issue 18 March 2024 PC-0071422...

  • Page 2: Introduction

    Instruction Manual FT74XA 1 Introduction This manual contains instructions for the correct use and maintenance of the FT74XA manufactured by Armfield Limited. The information contained in this manual is intended for the user who is required to read it carefully and to ensure that he has fully understood it before operating the machine.
  • Page 3 Armfield Ltd Instruction Manual FT74XA The following harmonised standards were also consulted for the design and construction of the equipment: BS EN 61010-1:2010 Safety requirements for electrical equipment for measurement, control, and laboratory use BS EN 61000-6-1:2007 Electromagnetic compatibility (EMC). Generic standards.

  • Page 4: Table Of Contents

    6.13 Protective clothing....................15 6.14 Machine maintenance ................... 16 General Overview ......................18 Equipment Diagrams ....................19 FT74XA valve and sensor Idents ................22 Electrical diagram ....................23 Certificate of conformity – Pressure Equipment Regulations ........24 10 Description ........................25 10.1 Overview .......................
  • Page 5 Aseptic processing (FT74XA-45 and FT83) ............48 10.19 Product Divert for Tubular Heat Exchanger (FT74-22) ........50 10.20 Suction feed (FT74XA-41) and Suction feed with water supply (FT74-53) ..50 10.21 Controllable cooling (FT74-51) ................51 10.22 pH sensor ......................51 10.23...
  • Page 6 Instruction Manual FT74XA ............................64 11.7 Controllable cooling (FT74-51) ................65 11.8 FT74XA-45 Sterilisation link installation with Tubular and plate heat exchangers . 65 11.9 FT74XA-46 Controllable Preheat option ..............69 11.10 Connecting the homogeniser to FT74XA ............70 11.10.1 Electrical Connections ................
  • Page 7 Armfield Ltd Instruction Manual FT74XA 13.8 Homogeniser interconnection plates (FT31/32) ............. 86 13.9 Two stage cooling option (FT74-33) ..............86 13.10 Additional heating plates option (FT74-34) ............86 13.11 Variable holding tube option (FT74-65) ............. 86 13.12 Sterilisation Link (FT74-45) ................86 13.13...

  • Page 8: Disclaimer

    Armfield Limited. Should you have any queries or comments, please contact the Armfield Customer Support helpdesk (Monday to Thursday: 0830 - 1730 and Friday: 0830 - 1300 UK time).

  • Page 9: Symbols

    Armfield Ltd Instruction Manual FT74XA 5 Symbols General warning indicating the potential risk of personal injury Danger warning Caution: Explosion Risk Electrical hazard Cold Burn hazard High Voltage hazard Caution: Flammable Rotating parts hazard Caution: Biohazard Caution: corrosive material Do not remove safety guards from...

  • Page 10: Safety

    Armfield Ltd Instruction Manual FT74XA 6 Safety 6.1 Failure to comply with safety standards Failure to comply with the safety standards described in this manual and those relating to common sense can cause danger to people and the environment and damage the Equipment.

  • Page 11: Intended Conditions Of Use

    Changes or modifications to the machine, within the limits that do not go beyond extraordinary maintenance, are only permitted if agreed on beforehand with the manufacturer. Only original spare parts or parts specifically declared as compatible by Armfield Limited must be used for regular maintenance operations.

  • Page 12: Noise

    Armfield Ltd Instruction Manual FT74XA 6.6 Noise The A-weighted sound power level emitted by the machine does not exceed 85dB(A). This value is guaranteed if the Equipment is installed correctly, that is, in stable conditions with appropriate fastenings and measured at a distance of 1 metre from the Equipment.
  • Page 13 You are also required to introduce suitable procedures for handling these substances and keep appropriate records. Since the equipment supplied by Armfield Limited may involve the use of substances which can be hazardous (for example, cleaning fluids used for maintenance or chemicals used for particular demonstrations) it is essential that the responsible person in authority implements the COSHH regulations or local equivalent.

  • Page 14: Water Borne Hazards

    Armfield Ltd Instruction Manual FT74XA 6.9 Water Borne Hazards The equipment described in this instruction manual involves the use of water/fluid, which under certain conditions can create a health hazard due to infection by harmful micro- organisms. For example, the microscopic bacterium called Legionella pneumophila will feed on any scale, rust, algae or sludge in water and will breed rapidly if the temperature of water is between 20 and 45°C.

  • Page 15: Leakage Of Hazardous Fluids

    Armfield Ltd Instruction Manual FT74XA This unit is designed to operate with a maximum liquid temperature of 165°C and minimum liquid temperature of -5°C. There is also a potential risk of scalding from hot liquids or vapours (e.g. steam). Before disconnecting any of the pipes or tubing: •...

  • Page 16: Machine Maintenance

    Armfield Ltd Instruction Manual FT74XA Wear suitable eye protection to protect your eyes from various types of possible hazards: mechanical debris, chemicals and hot water/steam. Ear Protection Wear suitable ear protection to protect your ears from excessive noise. Breathing Protection Wear suitable breathing protection to protect your respiratory system from fumes.
  • Page 17 Armfield Ltd Instruction Manual FT74XA PC-0071422 Issue 18 March 2024...

  • Page 18: General Overview

    The FT74XA may be sited in most production environments and is well suited to operation in the laboratory. Typical product throughput is 10-20 L/h but, depending on processing temperature, a wide range of flow rates may be used.

  • Page 19: Equipment Diagrams

    Instruction Manual FT74XA 8 Equipment Diagrams Figure 1 Process flow diagram of FT74XA fitted with tubular heat exchanger (FT74-20) T = temperature sensor, P = pressure sensor, F2 = cooling water flowmeter, L = level sensor PC-0071422 Issue 18 March 2024...
  • Page 20 Armfield Ltd Instruction Manual FT74XA Figure 2 Process flow diagram of FT74XA fitted with plate heat exchanger (FT74-30) T = temperature sensor, P = pressure sensor, F = flowmeter, L = level sensor. Initial heating and cooling employs heat regeneration. PC-0071422...
  • Page 21 Instruction Manual FT74XA Figure 3 Process flow diagram of FT74XA fitted with options for controllable pre-heat, secondary cooling (FT74- 24) and the sterilisation system (FT74-45), product divert *FT74-22), pneumatic pinch valve (FT74-42, alternative to V2 to handle products with suspended solids), suction feed (FT74-41 or FT74-53 – allows feeding from an external tank), CIP pump cleaning (FT74-52).

  • Page 22: Ft74Xa Valve And Sensor Idents

    Armfield Ltd Instruction Manual FT74XA 8.1 FT74XA valve and sensor Idents Product pressure relief valve Product backpressure valve Suction feed water supply valve HWC divert valve (main heat) HWC pressure relief valve (main heat) Cooling water isolation valve HWC divert valve (pre heat – twin boiler version) HWC pressure relief valve (pre-heat –...

  • Page 23: Electrical Diagram

    8.2 Electrical diagram...

  • Page 24: Certificate Of Conformity - Pressure Equipment Regulations

    Product Code: Pressurised Hot Water Circulator Declaration: We certify that the boiler vessel and pipework installed on the above Armfield product has been designed, manufactured and hydraulically pressure tested in accordance with the Pressure Equipment Regulations 1999 (Statutory Instruments, 1999 No 2001) Category 1.

  • Page 25: Description

    10.1.4 Product cooling system The FT74XA has two quick release connections on the side of the unit, at the bottom, for attachment of a cooling medium supply to feed the primary cooling section of the heat exchanger.

  • Page 26: Product Processing

    (T1) and an optional electromagnetic flowmeter (F1, FT74-40) to the heat exchanger. The FT74XA provides services for two heat exchangers, plate and tubular, to cater for a wide range of product viscosities. In the plate heat exchanger (-46 option not specified) product is first heated by hot product in the interchange section before entering the heating section where it is further heated by pressured hot water to the desired holding temperature.

  • Page 27: Feed Pump

    Armfield Ltd Instruction Manual FT74XA the feed tank before adding the new liquid. This may be achieved by activating the LEVEL OVERRIDE function on the pop up window on the touch screen control panel. A valve is situated directly below the feed tank to allow drainage and also for clean in place (CIP) recirculation.

  • Page 28: Touch Screen Control Panel And Operation Modes

    10.5 Touch screen control panel and Operation Modes The FT74XA unit is controlled via a touch screen panel on the front of the unit. The touch screen panel is activated whenever power is applied to the unit. The introduction screen is shown below: Figure 4 Introductory screen.
  • Page 29 Armfield Ltd Instruction Manual FT74XA Figure 5 From the Standby screen the mode of operation, Process, Clean in place (CIP) and Sterilisation in place (SIP) can be selected. Figure 6 Process mode with controllable pre-heat (-46), Suction feed with change over valve to switch between product and water (-53), homogeniser (FT91-74XA).
  • Page 30 Armfield Ltd Instruction Manual FT74XA Figure 7 Recipe screen: There are 10 recipes for which processing parameters for a particular product can be saved. Processing parameters include the PID tuning parameters for pre-heat (-46 option only) and main heat which may need to be changed depending on flow rate and temperature of operation. Recipe 1 and 2 are reserved and contain the PID settings for the tubular heat exchanger with 2s and 15s holding tubes respectively.
  • Page 31 Figure 9 SIP. Pressing the SIP button from the Standby screen brings up the SIP intro screen where a list of instructions must be completed and confirmed before SIP can begin. SIP mode enables the FT74XA, FT83 Sterile filler and connecting pipework to be sterilised prior to processing product for sterile packaging. Once the SIP process is complete and operator can progress to Process mode by pressing the Go to Process button.

  • Page 32: Armbus Operation

    Armfield Ltd Instruction Manual FT74XA Figure 10 Selecting CIP (clean in place) from the Standby screen brings up the CIP intro screen where a list of instructions must be completed and confirmed before CIP can begin. CIP allows the system to be cleaned by recirculating a cleaning solution, usually caustic or acid 10.6 Armbus operation...
  • Page 33 Armfield Ltd Instruction Manual FT74XA Standard elements: • Navigate to a storage location, enter a filename for the export file. Save as • Click Save. • When in Manual mode, every time user clicks Manual Data Entry (4) a row of sensor data will be added with Auto / Manual Sampling time stamp.
  • Page 34 Armfield Ltd Instruction Manual FT74XA Click to select sensor(s) data to display Unselected sensors display a red X; • Selected sensors display a green ✓. Sensor Selection Window Selected sensor names appear above the chart: names are colour-coded to correspond with chart plot.

  • Page 35: Shutting Down

    Armfield Ltd Instruction Manual FT74XA Shutting Down If the unit is to be shut down completely the operator should first shut down the software. This is performed from the home screen and the button pressed and the software allowed to shut down completely before power is turned off.

  • Page 36: Armbus™ Results Viewer

    The armBUS™ Results Viewer supports Microsoft Windows™ versions 7, 8 and 10. On a suitable Windows-based PC, install the viewer provided on the Armfield USB key supplied with your Equipment: in the armBUS Results Viewer folder, double click setup.exe and follow the installation process.

  • Page 37: Application Screen

    Armfield Ltd Instruction Manual FT74XA 10.6.5 Application Screen Upon launch, the software displays the screen shown in the figure below. Figure 14 armBUS™ Result Viewer (Screen) PC-0071422 Issue 18 March 2024...
  • Page 38 Armfield Ltd Instruction Manual FT74XA (10) (11) (12) (13) (14) (15) (16) Figure 15 Data Log Screen Elements Contact screen elements are defined as: Number Title Description Screen area displaying list of recorded Start / Stop periods Stop / Stop (Pane) stored in the opened Data Log file.

  • Page 39: Opening A Data Log File

    Armfield Ltd Instruction Manual FT74XA Select to select hour view of chart: notice the time-shift (10) Hours beneath the chart. Select to select day view of chart: notice the time-shift (11) Days beneath the chart. With Chart (9) unchecked: check Ordered box to order...

  • Page 40: Cooling Medium System

    Primary coolant for reducing product temperature after heat processing is connected to the FT74XA via quick release connectors on the side of the unit at the bottom see below. The electronic flowmeter inside the cabinet indicates flow rate in litres per minute and is displayed on the touchscreen.
  • Page 41 FT74XA Figure 17 Primary coolant connections Both the plate and tubular heat exchangers used with FT74XA may be used with a secondary coolant when low product outlet temperatures are required. In this case coolant pipework is attached directly to the heat exchanger. Option FT74-24 (tubular) FT74-33 (plate) provide an additional 2o cooling stage.

  • Page 42: Electrical Tray

    Armfield Ltd Instruction Manual FT74XA 2o refrigerant IN 2o refrigerant OUT Figure 18 FT74-24 with connections for secondary refrigerant 10.9 Electrical tray The electrical cabinet is IP65-rated and locked with by a standard key. An Earth Leakage Circuit Breaker or Residual Current Device shuts off power in the event of a short to earth, protecting personnel.

  • Page 43: Tubular Heat Exchanger (Ft74-20-Mkiii)

    Armfield Ltd Instruction Manual FT74XA Inside the electrical cabinet 10.10 Tubular heat exchanger (FT74-20-MkIII) The tubular heat exchanger comprises of 5 sections of dual concentric tubes. In all cases product flows through the centre whilst the service liquid (heating or cooling water) flows through the outer tube.

  • Page 44: Turbulence Promoters - Static Mixers (Ft74Xa-21)

    10.11 Turbulence promoters – static mixers (FT74XA-21) With more viscous materials it can be difficult to reach high holding temperatures due to heat transfer area limitation. This can lead to large temperature differentials between the heating medium and the product which in turn leads to fouling.

  • Page 45: Plate Heat Exchanger (Ft74-30-Mkiii)

    Armfield Ltd Instruction Manual FT74XA Static mixer element (1 of 4 elements per heat exchanger tube) 10.12 Plate heat exchanger (FT74-30-MkIII) In standard format the heat exchanger is configured as a conventional three stage design mounted in a single framework. Section (A) is the interchange or regeneration section, section (B) is the heating section and section (C) is the cooling section –...

  • Page 46: Homogeniser Plate

    20, 30 and 55 seconds when operated at a product flow rate of 10 L/h. 10.15 Product divert for tubular heat exchanger (FT74XA-22) The product divert option enables product that is below an operator-defined temperature to be diverted away from the process.

  • Page 47: Pneumatic Pinch Valve Operation (Ft74Xa-42)

    The homogeniser is rated up to 30 L/h and has a maximum operating pressure of 600 bar. The flow rate of the homogeniser is controlled automatically by the FT74XA to match the flow rate to the feed pump flow rate. PC-0071422...

  • Page 48: Aseptic Processing (Ft74Xa-45 And Ft83)

    Although the FT74XA is capable of process temperatures suitable for producing an aseptic product, the product itself is not likely to be aseptic since the FT74XA itself is not pre-sterilised. To achieve this the FT74-45 sterile link option and Sterile Filler (FT83) are required. The FT74- 45 provides addition heat exchanger surface area so that sufficiently hot water for sterilisation can be passed from the FT74XA to the sterile filler.
  • Page 49 Armfield Ltd Instruction Manual FT74XA Figure 21 Process schematic for tubular heat exchanger fitted with FT74-45 sterilisation option PC-0071422 Issue 18 March 2024...

  • Page 50: Product Divert For Tubular Heat Exchanger (Ft74-22)

    This option replaces the feed vessel with a feed assembly for attachment to a supply vessel such as Armfield’s FT140. The suction feed can be either with or without a water supply. The benefit of the water supply is that if the product feed goes low level then the system will automatically supply water to the feed pump until the product feed supply is restored.

  • Page 51: Controllable Cooling (Ft74-51)

    CW Supply Non-return valve Product IN Figure 23 FT74XA feed pump fitted with -53 suction feed option with water supply (via solenoid valve) 10.21 Controllable cooling (FT74-51) Secondary cooling inlet flow regulating valve can be controlled using software PID control, therefore precisely controlling product temperature after secondary cooling T5.

  • Page 52: Cleaning In Place (Cip)

    Armfield Ltd Instruction Manual FT74XA 10.23 Cleaning in Place (CIP) 10.23.1 Chemicals The types and concentrations of cleaning agents and detergents, the recirculation times and temperatures required will depend on the product being processed and the degree of fouling. Some experimentation will be required by users to determine the optimum CIP regime for their equipment and processes.

  • Page 53: Installation

    Primary coolant for reducing product temperature after heat processing is connected to the FT74XA via quick release connectors on the side of the unit near to the floor (Figure 24). The coolant flowrate (F2) is shown on the touchscreen. Coolant is delivered to the cooling section of the heat exchanger to reduce the temperature of the heat treated product.

  • Page 54: Secondary Cooling Systems (Options Ft74-33, Ft74-24)

    FT74XA Figure 24 Primary cooling connections Both the plate and tubular heat exchangers used with FT74XA may be used with a secondary coolant (options required) when low product outlet temperatures are required. In this case coolant pipework is attached directly to the heat exchanger.
  • Page 55 Armfield Ltd Instruction Manual FT74XA Coolant IN Coolant OUT Coolant IN Coolant OUT Figure 25 Primary and Secondary coolant connections for the tubular heat exchanger (FT74-24 option) PC-0071422 Issue 18 March 2024...
  • Page 56 Armfield Ltd Instruction Manual FT74XA Glycol Figure 26 FT74-30-33- Plan view Figure 27 FT74-30-33 End view PC-0071422 Issue 18 March 2024...

  • Page 57: Filling The Hot Water Circulator

    Armfield Ltd Instruction Manual FT74XA 11.5 Filling the hot water circulator The hot water circulator must be filled with softened or demineralised water to which a small quantity of a conductive salt is added (e.g. 1g of potassium hydrogen carbonate KHCO ).

  • Page 58: Installing The Equipment

    11.6 Installing the Equipment 11.6.1 Fitting heat exchangers and holding tubes The FT74XA is normally delivered with a heat exchanger already mounted and connected to services. However, if a heat exchanger is removed for cleaning or to fit a different heat exchanger then it is essential to reconnect to the services correctly.

  • Page 59: Tubular Heat Exchanger And Holding Tubes

    With these two variants of the tubular heat exchanger there are two additional cooling tubes. The service connections are triclamp type and are on the heat exchanger tubes directly. Armfield’s FT63 recirculating chiller can be attached directly to these connections. Ensure that the flow is counter-current to the product flow for maximum heat transfer.

  • Page 60: Fitting The Variable Holding Tube Ft74Xa-65

    FT74XA Figure 28 Tubular heat exchanger fitted with 15s holding tube (shown in green) 11.6.4 Fitting the variable holding tube FT74XA-65 The variable holding tube allows product hold times between 30 and 120 seconds to be used. The unit is compatible with both the plate and tubular heat exchangers. Figures below show how the holding tube is configured and connected to the heat exchangers.
  • Page 61 Inlet Return Return time (s) for coils used (mL) link tube link tube link tube temperature hose hose temperature sensor (T3) (s) sensor (T8) (s) 20+30 20+55 30+55 20+30+55 Figure 29 FT74XA-65 variable holding tube PC-0071422 Issue 18 March 2024...

  • Page 62: Fitting The Static Mixers (Ft74-21) To The Tubular Heat Exchanger

    Instruction Manual FT74XA Figure 30 Tubular heat exchanger fitted with FT74XA-65 variable holding tube (feed hopper removed for clarity) Figure 31 Plate heat exchanger fitted with FT74XA-65 variable holding tube (feed hopper removed for clarity) 11.6.5 Fitting the static mixers (FT74-21) to the tubular heat exchanger The FT74-21 option contains sufficient number of static mixers for one heat exchanger tubes with four mixer elements being fitted to each tube.

  • Page 63: Connecting Flow Meter Option (Ft74-40)

    The flow meter option (FT74-40) is fitted between the outlet of the feed pump system and the inlet of the heat exchanger. When no flow meter is fitted to the FT74XA then the outlet from the feed system is connected directly to the inlet of the heat exchanger using a flexible hose.
  • Page 64 The outlet from flow meter to the heat exchanger, connected to the side marked with the ‘+’ symbol Figure 33 The four configuration options for the feed pump depending on the presence or absence of the flowmeter (FT74XA-40) and CIP (FT74XA-52). PC-0071422 Issue 18 March 2024...

  • Page 65: Controllable Cooling (Ft74-51)

    When the chiller is on, set the pressure regulator to 3bar. 11.8 FT74XA-45 Sterilisation link installation with Tubular and plate heat exchangers High temp/pressure flexible pipes are used to connect the heat exchangers to the FT74XA- 45. Arrangements are shown below: PC-0071422 Issue 18 March 2024...
  • Page 66 Armfield Ltd Instruction Manual FT74XA Figure 35 Connections between FT74XA-45 sterilisation link and the tubulare heat exchanger PC-0071422 Issue 18 March 2024...
  • Page 67 Armfield Ltd Instruction Manual FT74XA Figure 36 Connections between FT74XA-45 sterilisation link and the tubulare heat exchanger PC-0071422 Issue 18 March 2024...
  • Page 68 Armfield Ltd Instruction Manual FT74XA Figure 37 When both tubular and plate heat exchangers have been ordered then the PHE may be connected to the FT74XA-45, as shown. PC-0071422 Issue 18 March 2024...

  • Page 69: Ft74Xa-46 Controllable Preheat Option

    Armfield Ltd Instruction Manual FT74XA 11.9 FT74XA-46 Controllable Preheat option To prime the controllable preheat circuit with water. Fully open the red-handled valve. Disconnect the flexible from the pre-heat return at the point where it attaches to the bulkhead fitting on the cabinet top. Attach a cold water supply to the bulkhead fitting. The flexible should be placed into a container to catch any water that escapes.

  • Page 70: Connecting The Homogeniser To Ft74Xa

    11.10.1 Electrical Connections There are two electrical connections that come from the homogeniser and connect to the FT74: 1. Armbus connection from the homogeniser that connects to the FT74XA 2. Cable for speed control. Product divert Sterilisation solenoid valves (2 sockets)

  • Page 71: Process Connections

    Note: homogenizer should not be used with demineralised / deionised / RO water, as this will lead to premature damage to homogenizer valves. All process connections between the FT74XA and the FT91 should be made with the braided stainless steel flexibles provided with the FT91.
  • Page 72 Armfield Ltd Instruction Manual FT74XA Homogeniser UPSTREAM HOMOGENISATION DOWNSTREAM HOMOGENISATION Homogeniser Figure 42 Positioning of the FT91 when connecting to the tubular heat exchanger The plate heat exchanger can be fitted with intermediate plates to allow product to be taken out either upstream (FT74-31) or downstream (FT74-32) of the heat treatment section.

  • Page 73: Electrical Wiring Diagram

    Armfield Ltd Instruction Manual FT74XA Figure 44 FT74-32 Downstream homogeniser plate showing connections to the homogeniser 11.11 Electrical Wiring Diagram Please see the following wiring diagrams attached at the rear of this manual. If you are viewing this manual electronically please see accompanying pdf.

  • Page 74: Operation

    CIP procedure implemented. 12.2 Product Limitations • Particulates The FT74XA is limited to use with products containing particles no larger than 0.8mm and fibres no longer than 25 mm. PC-0071422 Issue 18 March 2024...

  • Page 75: Product Processing (Non-Sterile)

    The addition of static mixers (FT74-21) 12.3 Product Processing (non-sterile) The FT74XA is controlled from the touch screen. The FT74XA powers up to the Introductory screen. From this screen the Standby button is pressed and from the next screen Process is...
  • Page 76 Armfield Ltd Instruction Manual FT74XA Figure 46 Process screen 1. At the start of operations, the feed tank should be full of clean water and the product outlet hose should be returning to the feed tank. Press the recipe hen return to the Processing screen.

  • Page 77: Product Processing (Sterile)

    Derivative 5. Enter SIP mode and complete the task list. Once SIP cycle has completed another set of instructions will request that cooling is turned on for the FT74XA. Once relevant downstream temperatures have dropped bellowed the defined cooling temperature then the operator will be requested to transfer backpressure from the FT83 to the FT74XA.

  • Page 78: Operation With The Homogeniser (Ft91)

    (CIP) 12.5 Operation with the homogeniser (FT91) If the homogeniser is connected to the FT74XA then additional screen information will be displayed: Figure 48 Process screen with homogeniser controls displayed...

  • Page 79: Operation Method (Upstream Homogenisation)

    Armfield Ltd Instruction Manual FT74XA Note: As well as this manual always read the homogeniser manufacturer’s Operation and Service manual before using the equipment. Note: Both homogenisation valves should be fully open before starting the pump. Note: Always start the homogeniser in Manual mode and match the flow rate accurately to the feed pump before switching to Auto mode.

  • Page 80: Clean In Place (Cip)

    3. Once the boiler temperature (T11) has dropped below 75 C the heater can be turned off. 4. Turn off the cooling supply to the FT74XA 5. Return to the Standby screen and then enter CIP mode. 6. Ensure the backpressure valve is fully open 7.
  • Page 81 CIP PUMP Figure 53 FT74XA-53 (suction feed) connections with CIP (-52 option). For cleaning the FT74XA feed hopper is attached to the inlet of the CIP pump. The outlet of the CIP pump is attached to the suction feed inlet (-53). The level sensor used to control the process must be changed from the -53 level sensor to the feed hopper level sensor.

  • Page 82: Aseptic Operation (Ft74-45 And Ft83, Ft74-91 Not Fitted)

    4. Turn on the feed pump and set the speed to about 7% (10L/hour) 5. Turn OFF the cooling to the FT74XA and turn ON the cooling to the FT83. The cooling drain pipe to the FT74XA MUST be connected so that any pressure build-up during sterilisation can relieve to drain.

  • Page 83: Key System Features

    Instruction Manual FT74XA 6. Adjust the FT74XA backpressure valve to give a pressure at P1 of 4.5 bar. Then adjust the FT83 backpressure valve sufficiently to give a pressure at P1 of 5.0 bar. 7. Turn on the hot water circulator and allow the system to heat up. Once all key temperature sensors exceed the defined sterilisation temperature then the cycle timer will begin counting down.

  • Page 84: Equipment Specifications

    Armfield Ltd Instruction Manual FT74XA • Over Pressure: If during processing the pressure in the boiler rises above the safety cut out level then the over-pressure LED will show red. The feed pump and hot water circulator pump will continue to operate but the heater elements will turn off and the system will cool to reduce the pressure in the boiler.

  • Page 85: Ft74-20 Tubular Heat Exchanger

    Armfield Ltd Instruction Manual FT74XA Orifice diameter: 3 mm 13.5 FT74-20 tubular heat exchanger Number of tubes: 5 (1 preheat, 2 heating, 2 cooling) Tube diameter (product side): 8.1 mm Overall tube diameter: 15.8 mm Length (heated): 0.8 m Material: 316 stainless steel...

  • Page 86: Homogeniser Interconnection Plates (Ft31/32)

    Armfield Ltd Instruction Manual FT74XA 13.8 Homogeniser interconnection plates (FT31/32) An additional interconnecting plate that allows product to be taken from the regeneration stage and fed to an homogeniser prior to return to the remainder of the regeneration stage of the plate heat exchanger.

  • Page 87: Product Temperature Controller Settings

    Armfield Ltd Instruction Manual FT74XA 13.14 Product temperature controller settings The product temperature T3 is controlled to the desired temperature using a three term PID controller. Settings for each of the three terms (Proportional, Integral and Differential), may need to be adjusted to suit particular equipment configurations and processing parameters.

  • Page 88: Routine Maintenance

    Armfield Ltd Instruction Manual FT74XA 14 Routine Maintenance 14.1 Responsibility To preserve the life and efficient operation of the equipment it is important that the equipment is properly maintained. Regular maintenance of the equipment is the responsibility of the end user and must be performed by qualified personnel who understand the operation of the equipment.

  • Page 89: Backpressure Valve Assembly/Disassembly For Cleaning

    Armfield Ltd Instruction Manual FT74XA 14.6 Backpressure valve assembly/disassembly for cleaning At regular intervals the backpressure valve should be disassembled for cleaning. The procedure for assembly/disassembly is given below: • Turn off the feed pump. • Fully open the back pressure valve and allow all pressure to dissipate.

  • Page 90: Pid Temperature Controller Settings

    Torque nuts to 60 inch pounds (6.7N/m) when reassembling • Re-fit to the FT74XA and then turn on the feed pump. Tighten the valve handwheel until P1 reads approximately 9 bar. There should be no leaks from the valve body. If leaking occurs then tighten each nut, a little at a time until the leaking stops.

  • Page 91: Electromagnetic Flow Meter Settings (Ft74-40)

    25mm. Care should be taken in preparation of both water and products for use with the FT74XA in order to prevent particles entering the system. If the flowmeter becomes blocked or partially blocked there will be a rapid rise in system pressure which may activate the pressure relief valve.
  • Page 92 Armfield Ltd Instruction Manual FT74XA mode is active. When in programming mode the key is used to retrieve or write various function codes and function data. • The up/down keys are used in programming mode to change the function code or data setting.

  • Page 93: Dismantling And Re-Assembly Of The Plate Heat Exchanger

    Armfield Ltd Instruction Manual FT74XA Motor 1 (No-load current) Set by Autotune when hot Motor 1 (%R1 setting) using P04=1 Set by Autotune when hot Motor 1 (%X setting) using P04=1 Initial Frequency Setting 14.10 Dismantling and re-assembly of the plate heat exchanger It is essential that the clean in place (CIP) procedure is carried out after every use as described in ‘Cleaning in place...
  • Page 94 Armfield Ltd Instruction Manual FT74XA • The final tightening dimension is based on the distance between the inside edge of both end plates and this is set in the factory. This dimension is best measured using a digital vernier gauge and must be identical on both sides of the heat exchanger near the studs.
  • Page 95 Armfield Ltd Instruction Manual FT74XA Tightening dimensions for FT74-30-32 and FT74-30-33. Note: 14.4mm should be added to the tightening dimension if the option FT74-34 is specified PC-0071422 Issue 18 March 2024...

  • Page 96: Checking For Correct Operation After Reassembly

    Armfield Ltd Instruction Manual FT74XA Tightening dimensions for FT74-30-31-33 and FT74-30-32-33. Note: 14.4mm should be added to the tightening dimension if the option FT74-34 is specified 14.10.1 Checking for correct operation after reassembly Reconnect the triclamp fittings for the product side but leave all service connections unmade.

  • Page 97: Dismantling And Re-Assembly Of The Tubular Heat Exchanger

    Armfield Ltd Instruction Manual FT74XA 14.11 Dismantling and re-assembly of the tubular heat exchanger It is essential that the clean in place (CIP) procedure is carried out after every use as described in the Operation section.. With properly developed CIP procedures the number of manual cleanings through heat exchanger dismantling can be minimised.
  • Page 98 Armfield Ltd Instruction Manual FT74XA After that, click ‘Cal’ and you will be prompted to insert the probe to buffer 1 and insert the pH the value of the buffer. After the probe reading has stabilised, you will be asked to repeat the same for the buffer number 2.

  • Page 99: Storage

    Armfield Ltd Instruction Manual FT74XA For the sensor to show up in the software, adjust the setting via the maintenance screen. 14.14 Storage The unit should be disconnected from the electricity supply when not in use. Always cover the unit with a dust cloth or plastic sheet if not used for long periods.

  • Page 100: Contact Details For Further Information

    Armfield Ltd Instruction Manual FT74XA 15 Contact Details for Further Information Main Office: Armfield Limited 10 Headlands Business Park Salisbury Road Ringwood Hampshire England BH24 3PB Tel: +44 (0)1425 478781 Fax: +44 (0)1425 470916 Email: sales@armfield.co.uk support@armfield.co.uk Web: http://www.armfield.co.uk US Office: Armfield Inc.

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