testo 550 · Digital manifold
Contents
1. Change parameter select unit Adjustable parameters Representation Explanation Cr Set temperature unit bar kPa MPa psi Set unit of pressure Pabs Prel or psia Depending on the selected unit of pressure psig Switch between absolute and relative pressure display 29 92 inHg Set current absolute pressure see table 1 013 bar TEJAS Select measuring mode see Selecting the measuring mode page 13 Settings will be applied following the final selection Operating valve positioner The digital manifold acts like a conventional two way manifold with regard to the refrigerant path The passages are opened by opening the valves The adjacent pressure is measured with valves closed as well as with them open gt Open valve Turn valve positioner anticlockwise gt Close valve Turn valve positioner clockwise 6 1 6 1 1 6 Using the product Only tighten valve positioner with your hand Do not use any tools when tightening as otherwise the thread may be damaged Using the product Preparing for measurement Connecting the temperature sensor O Sensors must be connected before the measuring 1 instrument is switched on so that they are recognised by the instrument Surface temperature sensor An NTC temperature sensor accessory must be connected for measuring the pipe temperature and for automatic calculation of superheating and subcooling Deactivating the surface compensation factor for insert2. w testo 550 Digital manifold Instruction manual 1 Contents Contents Concili 3 Safety and the environment ss 4 2 1 About this document 4 2 2 Ensure SAM at 5 2 3 Protecting the environment 5 Specifications iii iaia 6 cli Velica 6 2 NG CMMMIGAL ala ccoo 6 Product GEOSCHID Muscari esse cen cannes sente es s que 8 4 1 CONC is 8 FIS ESTOS cimas a e aaa 9 Using the produci 11 6 1 Preparing for measurement 11 6 1 1 Connecting the temperature sensor 11 6 1 2 Switching the Insirumentoni lle 12 6 1 3 Selecting the measuring mode 13 6 2 Performing the measurement 14 Maintaining the PrOQUECE nsninnmiainaan andina la nheenesesmeaienne 16 Tips and assistance sssssissinrenrrennrnennnnns 18 8 1 Questions and answers 18 8 2 Measurement parameters 18 0 9 TFOT NODOMS iii 19 8 4 Accessories and spare parts 19 2 Safety and the environment Safety and the environment About this document Use gt Please read this documentation through carefully and familiarize yourself with the product before putting it to use Pay particular attention to the safety instructions and warning advice in order to prevent injuries and damage to the products gt Keep this document to hand so that you can refer to it when necessary gt Hand this documentation on to any subsequent users of the product Symbols
3. R407C R408A R409A R410A R411A R413A R414B R416A R417A R420A R421A R421B R422A R422B R422D R424A R427a R434A R437A R438A R502 R503 R507 R600 R600a R718 H20 R744 only in permissible measuring range up to 50 bar R1234yf Display T8 Measurable media All media that are stored in the testo 550 Not measurable Ammonia R717 and other refrigerants which contain ammonia Operating temperature 10 to 50 C 14 to 122 F Storage temperature 20 to 60 C 4 to 140 F Material ABS PA TPU Dimensions 265 x 135 x 75 mm Weight approx 1000 g without batteries Current source Rechargeable batteries batteries 4x 1 5 V type AA mignon LR6 Battery life approx 150 h display light off Type Illuminated LCD Updating of readings 1s Response time 0 5 s EC Directive 2004 108 EC Duration 2 years Warranty conditions see website www testo com warranty 4 Product description 4 4 1 Product description Overview Display and control elements 1 Mini DIN probe socket for NTC temperature probe with socket cover 2 Foldable suspension device on rear 3 Display Instrument status icons Select measuring mode see Pay 4 Battery compartment It is not possible to charge rechargeable batteries in the instrument 5 First steps 5 Control keys Key Function Set Set units R Start Stop Select refrigerant Start stop Tightness test Mode Switching measur
4. and writing standards Representation Explanation A Warning advice risk level according to the signal word Warning Serious physical injury may occur Caution Slight physical injury or damage to the equipment may occur gt Implement the specified precautionary measures Note Basic or further information alee Action more steps the sequence must be followed gt db Action a step or an optional step oa Result of an action Menu Elements of the instrument the instrument display or the program interface OK Control keys of the instrument or buttons of the program interface sala Functions paths within a menu Example entries 2 2 2 3 2 Safety and the environment Ensure safety gt Do not operate the instrument if there are signs of damage at the housing mains unit or feed lines Do not perform contact measurements on non insulated live parts Do not store the product together with solvents Do not use any desiccants Carry out only the maintenance and repair work on this instrument that is described in the documentation Follow the prescribed steps exactly Use only original spare parts from Testo The objects to be measured or the measurement environment may also pose risks Note the safety regulations valid in your area when performing the measurements If the measuring instrument falls or another comparable mechanical load occurs the pipe sections of the refrigerant hos
5. e 1 to Ev is displayed after the complete evaporation the condensation temperature tc Co is displayed after the complete condensation The measured temperature must be assigned to the superheating or the subcooling side ton lt gt tcu Depending on this assignment ton T1 or Aton SH or tu T2 or Atcu SC is shown depending on the selected display 14 6 Using the product Reading and display illumination flash e 1 bar before reaching the critical pressure of the refrigerant e upon exceeding the max permissible pressure of 50 bar Key functions gt A or W Change the reading display Possible display combinations Evaporation pressure Condensation pressure Refrigerant evaporation Refrigerant condensation temperature to Ev temperature tc Co or only with connected temperature probe Evaporation pressure Condensation pressure Measured temperature tn T1 Measured temperature t T2 or only with connected temperature probe Evaporation pressure Condensation pressure Superheating Atcr SH Subcooling At SC With two connected NTC probes At is also shown gt Mean Min Max Record readings display min max readings mean values since switching on Tightness test pressure drop test Systems can be tested for tightness with the 1 temperature compensated tightness test The system pressure and the ambient temperature are measured over a defined period for this A temperature probe can be connected t
6. er damage inside the measuring instrument which may not be detectable from outside gt For your own safety you should return the measuring instrument to the Testo Service for technical inspection You should therefore always replace the refrigerant hoses with new ones after the measuring instrument has dropped down or after any comparable mechanical loading Setting the refrigerant 1 Press R Start Stop This opens the refrigerant menu and the currently selected refrigerant flashes 2 Setting the refrigerant 12 6 1 3 6 Using the product Key functions Representation Explanation A or V Changing the refrigerant R Start Stop Confirm the setting and exit the refrigerant menu Available refrigerants Representation Explanation R Refrigerant number of refrigerant acc to ISO 817 i per Special Testo designation for certain refrigerants T8 T1234yf 7 no refrigerant selected Example Setting refrigerant R401B 1 Press A or V several times until R401B flashes 2 Press R Start Stop to confirm the setting Quitting the refrigerant selection gt Press R Start Stop or automatically after 30 s if no other key has been pressed Selecting the measuring mode 1 Press Set several times 2 Select function with A or V 3 Save setting press Sef Measuring mode is dsplayed Display Mode Function Refrigeration Normal functionality of the digital manifold sy
7. es may break The valve positioners may also be damaged whereby further damage to the interior of the measuring instrument may occur that cannot be identified from the outside The refrigerant hoses must therefore be replaced with new undamaged refrigerant hoses every time the measuring instrument falls or following any other comparable mechanical load Send the measuring instrument to Testo Customer Service for a technical check for your own safety Electrostatic charging can destroy the device Integrate all the components system manifold s valve block refrigerant bottle etc into the potential equalisation earthing Please see the safety instructions for the system and the refrigerant used Protecting the environment gt gt Dispose of faulty rechargeable batteries spent batteries in accordance with the valid legal specifications At the end of its useful life send the product to the separate collection for electric and electronic devices observe local regulations or return the product to Testo for disposal Refrigerant gases can harm the environment Please note the applicable environmental regulations 3 Specifications 3 2 Specifications Use The testo 550 is a digital manifold for maintenance and servicing work at refrigeration systems and heat pumps It must only be used by qualified authorized personnel The testo 550 replaces mechanical manifolds thermometers and pressure temperature tables by mea
8. hat measures the ambient temperature for this recommendation NTC air probe art no 0613 1712 Information about the temperature compensated differential pressure and about the temperature at the beginning end of the test exists as a result If no temperature probe is connected the tightness test can be performed without temperature compensation Y The steps described in the chapter Preparing for measurement have been completed 1 Press Mode leakage test view Leakage test view is opened AP is displayed 2 Start the leakage test Press R Start Stop 3 End the leakage test Press R Start Stop 15 7 Maintaining the product 16 Result is displayed 4 Confirm message Press Mode You automatically jump to the evacuation vacuum display menu Evacuation vacuum display The measurement is performed on the low pressure i Side 5 Press Mode Result is displayed on the low pressure side 6 Press Mode The measuring mode is displayed Maintaining the product Cleaning the instrument gt Ifthe housing of the instrument is dirty clean it with a damp cloth Do not use any aggressive cleaning agents or solvents Weak household cleaning agents and soap suds may be used Keeping connections clean gt Keep screw connections clean and free of grease and other deposits clean with a moist cloth as required Removing oil residues gt Carefully blow out oil residues in valve bl
9. ing mode Min Max Mean Display min max mean values A Up key Change display view p 0 Pressure zeroing xt Light key Switch display light on off V Down key Change display view 10 Switching the instrument on off 6 Sight glass for refrigerant flow 7 2x valve positioner 8 3 x hose parkers for refrigerant hoses 9 3 x connections 7 16 UNF brass Left right Low pressure high pressure for refrigerant hoses with quick connect fitting passage can be locked via valve positioner Centre for refrigerant bottles for example with sealing cap First steps Inserting batteries rechargeable batteries 1 Fold out the suspension device and open the battery compartment clip lock 2 Insert batteries included in delivery or rechargeable batteries 4x 1 5 V type AA Mignon LR6 in the battery compartment Observe the polarity Close the battery compartment When not in use for long period Remove batteries rechargeable batteries Completely charge rechargeable batteries before using the instrument mie me 5 First steps 10 Switching the instrument on gt Press 0 Initialization phase e All display segments are lit length of time 2 s Measurement view is opened Performing settings 1 Press Set The configuration menu is opened and the adjustable parameter flashes 2 Set parameters Key functions Representation A or VI Set Select units parameters Explanation
10. ion and air temperature sensor A surface compensation factor has been set in the measuring instrument to reduce the measuring errors in the main field of applications This reduces measuring errors when using surface temperature sensors If the measuring instrument testo 550 is used in combination with insertion or air temperature sensors accessories this factor must be deactivated gt Press and hold the keys SET MODE together and switch on the measuring instrument 0 The instrument shows the message Fact off The surface compensation factor becomes active every 1 time the measuring instrument is switched on 11 6 Using the product 6 1 2 Switching the instrument on gt Press 0 Zeroing the pressure sensors Zero the pressure sensors before every measurement Y All connections must be pressureless ambient pressure gt Press key P 0 and execute Zeroing Connecting the refrigerant hoses Before each measurement check whether the refrigerant 1 hoses are in flawless condition The valve actuators are closed 1 Connect the refrigerant hoses for low pressure side blue and high pressure side red to the measuring instrument 2 Connect the refrigerant hoses to the system The measuring instrument dropping down or any other comparable mechanical load can cause breakage of the pipe pieces in the refrigerant hoses The valve actuators may also suffer damage which in turn could result in furth
11. ns of its functions Pressures and temperatures can be loaded adjusted tested and monitored The testo 550 is compatible with most non corrosive refrigerants water and glycol The testo 550 is not compatible with refrigerants that contain ammonia The product must not be used in areas at risk of explosion Technical data Characteristic Values Parameters Pressure kPa MPa bar psi Temperature C F K Sensor Pressure 2 x pressure sensor temperature 2xNTC Meas cycle 0 75 S Measurement Quantity 4 channels Interfaces Pressure connections 3 x 7 16 UNF NTC measurement Measuring ranges Pressure measuring range HP LP 1 to 50 bar rel 14 7 to 725 psi rel 100 to 5000 kPa rel 0 1 to 5 MPa rel Temperature measuring range 50 to 150 C 58 to 302 F Humidity application 10 to 90 RH range Overload 60 bar 6000 kPa 6 MPa 870 psi Resolution Pressure resolution 0 01 bar 0 1 psi 1 kPa 0 001 MPa Temperature resolution 0 1 C 0 1 F Characteristic Accuracy nominal temperature 22 C 71 6 F No of refrigerants Selectable refrigerants Measurable media Ambient conditions Housing Power supply Display Directives standards and tests Warranty 3 Specifications Values Pressure 0 75 of final value 1 digit Temperature 40 150 C 0 5 K 1 digit 40 No refrigerant R12 R22 R123 R134a R290 R401A R401B R402A R402B R404A R406A R407A
12. ock using compressed air Ensuring the measuring accuracy Testo Customer Service would be glad to further assist you if you so wish gt Check instrument regularly for leaks recommended annually Keep to the permissible pressure range gt Calibrate instrument regularly recommended annually 7 Maintaining the product Changing batteries rechargeable batteries Y Instrument is switched off 1 Fold out the suspension device loosen the clip and remove the cover of the battery compartment 2 Remove empty batteries rechargeable batteries and insert new batteries rechargeable batteries 4x 1 5 V type AA Mignon LR6 in the battery compartment Observe the polarity 3 Seton and close cover of the battery compartment clip must engage 4 Switch the instrument on Changing the valve or valve positioner handle Change of the valve positioners and valves by the customer is not permissible gt Send the measuring instrument to the Testo Customer Service 17 8 Tips and assistance Possible causes solution 8 Tips and assistance 8 1 Questions and answers Question laes The instrument switches off automatically uuuu lights up instead of the parameter display 0000 lights up instead of the parameter display 8 2 Name tcu 12 18 Batteries are almost empty gt Change batteries Residual capacity of the batteries is too low gt Change batteries The permissible measu
13. ring range has been undershot gt Keep to the permitted measuring range The permissible measuring range has been exceeded gt Keep to the permitted measuring range Measurement parameters Description Superheating evaporation pressure Subcooling condensation pressure Refrigerant evaporation temperature Refrigerant condensation temperature Measured temperature evaporation Measured temperature condensation 8 3 8 4 8 Tips and assistance Error reports Question Possible causes solution iS lit up instead of Sensor or cable defective measurement parameter gt Please contact your dealer or display Testo Customer Service Display EEP FAIL Eeprom defective gt Please contact your dealer or Testo Customer Service Accessories and spare parts Description Article no Clamp probe for temperature measurement 0613 5505 at pipes Pipe wrap probe with Velcro tape for pipe 0613 4611 diameters of up to max 75 mm Tmax 75 C NTC Watertight NTC surface probe 0613 1912 Precise robust NTC air probe 0613 1712 Transport case for measuring instrument 0516 5505 probe and hoses For a complete list of all accessories and spare parts please refer to the product catalogues and brochures or look up our website at www testo com If you have any questions please contact your dealer or Testo Customer Service The contact details can be found on the back of this document or on the Internet at w
14. stem Y Heat pump Normal functionality of the digital manifold VES Automatic If the automatic mode is activated the mode testo 550 digital manifold automatically changes the display of the high and low pressure This automatic change occurs when the pressure on the low pressure side is 1 bar higher than the pressure on the high pressure side During the change Load 2 s is shown in the 13 6 Using the product Function display Display This mode is especially suited to air conditioning systems which cool and heat 6 2 Performing the measurement Risk of injury caused by refrigerant that is at high pressure hot cold or poisonous Wear safety goggles and protective gloves Before pressurizing the measuring instrument Always fasten the measuring instrument at the suspension device in order to prevent it from falling risk of breakage Check if the refrigerant hoses are intact and connected correctly before each measurement Do not use a tool to connect the hoses Only tighten the hoses by hand max torque 5 0 Nm 3 7 ft lb Maintain permissible measuring range 0 to 50 bar Pay particular attention with systems with refrigerant R744 as these are often operated with higher pressures Measuring Y The steps described in the chapter Preparing for measurement have been completed Pressurize the measuring instrument Read off readings 2 With zeotropic refrigerants the evaporation temperatur
15. ww testo com service contact 19 0970 5501 en 06 V01 16
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