Liquid Level Sensor AKS 4100U

Transcription

1 MAKING MODERN LIVING POSSIBLE Technical brochure Liquid Level Sensor U

2 Liquid Level Sensor, U Contents Page Introduction...3 Features...3 Product concept...3 Cable Version Coaxial Version...3 Display interface (HMI)...5 Measuring principle...6 Material specification Approvals and certifications....6 Measuring range and installation information CABLE version...7 Measuring range and installation information COAXIAL version...8 Ordering U...9 Dimensions and weights Technical data Quick setup guide for CABLE version Quick setup guide for COAXIAL version Forcing ma output How to change the language setting Reset to factory setting Appendix1: Entering refrigerant dielectric gas constant Refrigerant saturated vapour dielectric constant DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

3 Liquid Level Sensor, U Introduction U liquid level sensor can be used to measure the liquid level of many different refrigerants in vessels, accumulators, receivers, level columns, etc. Cable Version Coaxial Version The U liquid level sensor is based on a proven techhology called Time Domain Reflectometry (TDR) or Guided Micro Wave. The electrical output is a 2-wired, loop powered 4-20 ma output signal, which is proportional to the refrigerant liquid level. Dust, foam, vapour, agitated surfaces, boiling surfaces, changes in density or in the dielectric constant, εr, for the liquid have no influence on the U performance. Oil accumulated in the bottom of a level column will not disturb the liquid level signal and it is not necessary to remove U for cleaning after oil has been drained out of the level column. Features One part number in the cable version is used for any probe length in the range of 31.5 in. to 197 in. (800 mm to 5000 mm) Cable version requires less top-end clearance for installation and service Proven operation with all refrigerants in combination with oil. No need to clean cable version when fully covered by oil. The cable version is very compact and easy to handle, ship, install and use with different lengths and refrigerants 2-wire loop powered Display interface units can be in mm, cm, m, ft, in. For further details regarding mechanical and electrical installation please refer to the product instructions PI.SC0.D (CABLE version) and PI.SC0.E (COAXIAL version). Product concept U is available in two different versions: Cable version Coaxial version The cable version is used for lengths from 31.5 in. (800 mm) and up to 197 in. (5000 mm) and is suitable for HCFC, Non flammable HFC and R717 (Ammonia). The U cable version should NOT be used for CO 2 or marine applications. The coaxial version of U is designed for use with R744 (CO 2 ), HCFC, Non flammable HFC and R717 (Ammonia). The U coaxial version should always be used for marine applications for all refrigerant types. Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H5916 3

4 Liquid Level Sensor, U Product concept (continued) Cable version U cable version must ALWAYS be installed in a level column. Danfoss M84H0001_1 Cable version The cable version consists of: Signal converter Mechanical process connection with 5 m (197 in.) ø2 mm (0.08 in.) stainless cable Counterweight Accessory bag comprising: 3 mm set screws Red cover to protect mechanical process connection prior to mounting signal converter. Setting label. Note: If the level column is not within 2" to 4" in size, the coaxial version should be used. Coaxial version Coaxial version can be installed in a level column (a) or directly in a vessel (b). a b Coaxial version The Coaxial version consists of: Signal Converter Mechanical process connection with 5 m (197 in.) Ø2 mm (0.08 in.) stainless steel wire Tube(s) depending on required length Accessory bag comprising: End Connector (incl. 3 mm (0.12 in.) set screws.) 3 mm (0.12 in.) set crews (1 set screw pr. tube) Red cover to protect mechanical process connection, before Signal Converter is mounted. Setting label. 4 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

5 Liquid Level Sensor, U Display interface (HMI) The HMI Service/Display unit is used for commissioning and quick on-site setup and is easily mounted on the U. The service unit supports mulitple languages in both SI and US units. * 4-20 ma output displayed as bar graph and in percentage [%] Measurement name (in this example, DISTANCE) Device tag name Measurement reading and unit Device status (markers) Marker 1, 2 and 3 (Error) Hardware problem; the Signal Converter hardware is defective. Contact Danfoss. Marker 4 and 5 (Notification) Depending on the level, the marker is ON or OFF. Used for Danfoss service information only. Keypad buttons Flashing star indicating unit in operation. Enter menu system Enter QUICK SETUP Unit change at distance/level readout: m, cm, mm, in, ft Change between: Distance* Level** Output (%)*** Output (ma)**** * If the display is set to DISTANCE then the value displayed will be the distance from the reference point (see diagram on p. 7 and 8) to the top surface of the liquid refrigerant. ** If the display is set to LEVEL then the value displayed will be the length of the probe length that is covered by the refrigerant (distance from bottom of level probe to the surface of the liquid refrigerant). See diagram on p. 7 and 8. *** If the display is set to OUTPUT (%) then the value displayed will be the % refrigerant level according to the 4 ma (0%) and 20 ma (100%) scale settings entered during setup. See diagram on p. 7 and 8. **** If the display is set to OUTPUT (ma) then the value displayed will be the ma output of the probe based on the refrigerant level and the 4 ma (0%) and 20 ma (100%) scale settings entered during setup. See diagram on p. 7 and 8. Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H5916 5

6 Liquid Level Sensor, U Measuring principle (Cable and Coaxial) 1. An electromagnetic (EM) pulse is transmitted by the signal converter 2. The pulse goes down the probe at the speed of light in air, V1 3. The pulse is reflected 4. The pulse goes up the probe at speed, V1 5. The converter receives the pulse and records the signal 6. The EM pulse moves at speed, V1 7. Transmitted EM pulse 8. Half of this time is equivalent to the distance from the reference point of the device (the flange facing) to the surface of the product 9. Received EM pulse The U electronic converter emits lowintensity, high frequency electromagnetic pulses with a width of approximately 1 nanosecond, which travel at the speed of light along the probe (wire or coaxial cable) down to the liquid surface. The pulses are reflected by the liquid surface, guided back along the probe, and received and analysed by the U electronic converter and then converted into a liquid level reading. This method is called time domain reflectometry (TDR) or guided microwave. The dielectric constant, εr, of the liquid is a key parameter and has a direct impact on the degree of reflection of the high frequency electromagnetic pulses. Liquids with high εr values, such as ammonia, produce strong reflections, while liquids with low εr values, such as CO2, produce weak reflections. As long as the εr value of the liquid refrigerant is higher than 1.2, U can detect the liquid level and level measurement accuracy is not affected. If the temperature condition in the level culomn/ vessel is known, a dielectric constant of the refrigerant gas can be entered in U (parameter GAS EPS.R), in order to improve the Dead Zone of probe. Refer to pages 7 to 8 for Measuring range of AKS 4100U - CABLE version and COAXIAL version. For details of gas constant values for different temperatures and refrigerants plus the procedure for entering these via the HMI, refer to pages 18 to 19. Material specification Housing Aluminium Coaxial (segmented) Standard: Stainless steel ( / 316L) Single cable Standard: Stainless steel ( / 316) Process fitting Standard: Stainless steel ( / 316L) Gaskets EPDM ( C / F) Cable gland Plastic (black) Approvals and certifications CE EMC LVD NAMUR This device fufills the statutory requirements of the EMC directives. The manufacturer certifies successful testing of the product by applying the CE mark. EMC Directives 2004 / 108 / EC and 93 / 68 / EEC in conjunction with EN (2006) and EN (2006). The device conforms to these standards if : - the device has a coaxial probe or - the device has a single probe that is installed in a metallic tank. Low-Voltage Directives 2006 / 95 / EC and 93 / 68 / EEC in conjunction with EN (2001) NAMUR NE 21 Electromagnetic Compatibility (EMC) of Industrial Process and Laboratory Control Equipment NAMUR NE 43 Standardization of the Signal Level for the Failure Information of Digital Transmitters 6 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

7 Liquid Level Sensor, U Measuring range and installation information CABLE version Because the cable version can be trimmed to the desired length during installation, it is required to record the following values on the setting label (included with probe) and stick the label on the signal converter for later use when programming: Probe length. The probe length can be trimmed to the desired length within the range of 31.5 in. and 197 in., but must allow a minimum clearance of 0.8 inches/20 mm from the bottom of the level column. Length to 4 ma setting. For a max. measuring range this length = Probe length bottom dead zone (given in tables) 1.3 inches/33 mm (counterweight height) Length to 20 ma setting. For the max. measuring range this length will be 4.7 inches/120 mm Note: The above lengths must be programmed into the U for the sensor to work. For most applications the bottom dead zone value can be taken from the table that is based on the factory setting for the dielectric constant, but if the refrigerant temperature is known, the dielectric constant can be changed to improve the measuring range (see appendix1 and table with improved bottom dead zone value). Bottom deadzone values based on the factory setting of dielectric constant Refrigerant Probe length range Bottom dead zone Ammonia, HFC, HCFC [in.] [mm] [in.] [mm] Improved Bottom dead zone value after the adjustment of dielectric constant Refrigerant Probe length range Bottom dead zone Ammonia, HFC, HCFC [in.] [mm] [in.] [mm] Top dead zones 4.7 in. (120 mm) Measuring range Standpipe diameter: 2-4 in. Reference point Probe length* 20 ma (100 %)* Surface level Distance 4 ma (0 %)* Inner length of the standpipe Bottom dead zone (see tables) Counterweight: 1.3 in. (33 mm) Min: 0.8 in. (20 mm) * Values to be entered into HMI Quick Setup menu and recorded on the setting label. Stick the setting label onto the Signal Converter either inside or outside. Danfoss M84H0063_1 Steel wire insertion length: 0.5 in. (12 mm) Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H5916 7

8 Liquid Level Sensor, U Measuring range and installation information COAXIAL version The coaxial version can be ordered in various predefined probe lengths but can be cut to a desired length during installation. Therefore, it is best to record the following values on the setting label (included with probe) and stick the label on the signal converter for later use when programming: Probe length. The probe length can be cut to the desired length but must be a min. length of 19.2 in./488 mm and allow a minimum clearance of 1.2 inches (30 mm) from the bottom of the level column. Dielectric constant only needs to be changed for CO 2 applications (see appendix1). For other refrigerants, the bottom dead zone can be taken from the table that is based on the factory setting of the dielectric constant. Length to 4 ma setting. For a max measuring range this length = Probe length bottom dead zone (given in the tables). Length to 20 ma setting. For the max measuring range this length will be 4.7 inches/ 120 mm. Note: The above lengths must be programmed into the U for the sensor to work. Please note: It is mandatory to input dielectric constant for CO 2 applications. U Dielectric Constant εr always set during Quick Setup Refrigerant Probe Length Bottom Bottom Dead Dead Zone Zone [in.] [in.] [mm] 19.2 CO * Values to be entered into HMI Quick Setup menu and recorded on the setting label. Stick the setting label onto the Signal Converter either inside or outside. Top dead zone 4.7 in. (120 mm) Reference point 20 ma (100 %)* Bottom dead zone values based on the factory setting of dielectric constant Refrigerant Probe Length Bottom Dead Zone Bottom Dead Zone [in.] [in.] [mm] Ammonia Bottom dead zone values based on the factory setting of dielectric constant Refrigerant Probe Length Bottom Dead Zone Bottom Dead Zone [in.] [in.] [mm] HCFC,HFC Measuring range Probe length* Surface level Distance 4 ma (0 %)* Inner length of the stand pipe Improved Bottom dead zone values after the adjustment of dielectric constant Refrigerant Probe Length Bottom Dead Zone Bottom Dead Zone [in.] [in.] [mm] 19.2 Ammonia Improved Bottom dead zone values after the adjustment of dielectric constant Refrigerant Probe Length Bottom Dead Zone Bottom Dead Zone [in.] [in.] [mm] 19.2 HCFC,HFC Bottom dead zone (see tables) Danfoss M84H0064_1 Min: 1.2 in. (30 mm) Ø0.08 in. (2 mm) stainless wire 8 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

9 Liquid Level Sensor, U Ordering U Cable verion: Standard version used for common refrigerants including R717 (ammonia), HCFC and HFC. Not for use with CO 2 or in marine applications. Description U with 196 in. insertion cable length which can be trimmed to desired length during installation within the range of 31.5 in. to 196 in. during installation. 3/4" NPT process connection. Code number With HMI Display 084H4521 Coaxial version: used for common refrigerants including R717 (ammonia), HCFC, HFC and CO 2. Can be used for marine applications Description Probe length Code number in. mm With HMI Display U - Coaxial version with 3/4" NPT process connection H4530 U - Coaxial version with 3/4" NPT process connection H4533 U - Coaxial version with 3/4" NPT process connection H4535 Spare parts and accessories Description U HMI Display Interface Code number 084H4548 Description U Signal Converter without HMI Display, excluding cable gland Code number 084H4541 Description Content Code number Cable and counterweight for U - CABLE version End connector incl screws for U - COAXIAL version Cable in. (5 m) Ø0.08 in. (Ø2 mm) Crimp Counterweight End connector (incl in. (3 mm) set screws) 084H H4549 Process connection, counterweight and 197 in. (5 m) Ø0.08 in. (Ø2 mm) cable for U - CABLE and COAXIAL version 3/4 in. NPT process connection Counterweight 084H4546 Description U Coaxial tube. Tube length : 26.8 in. (680 mm) U blank top cover for signal converter Code number 084H H4544 Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H5916 9

10 Liquid Level Sensor, U Dimensions and weights CABLE version Ø0.9 in. (Ø22 mm) Ø4.1 in. (Ø104 mm) Ø0.08 in. (Ø2 mm) 1.3 in. (33 mm) Ø3.6 in. (Ø92 mm) 5.6 in. (141.3 mm) 1.4 in. (34.2 mm) Probe length Weight: approx. 4.4 lbs (2.0 kg) COAXIAL version Ø4.1 in. (Ø104 mm) Ø0.6 in. (Ø14 mm) Ø0.8 in. (Ø21 mm) 5.6 in. (141.3 mm) 1.4 in. (34.2 mm) Probe length Weight: approx. 7.7 lbs (3.5 kg) 10 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

11 Liquid Level Sensor, U Technical data Measuring system Measuring principle 2-wire loop-powered level transmitter; Time Domain Reflectometry (TDR ) Refrigerants Primary measured value Secondary measured value Max. measuring range Level measurement of liquid refrigerants. Approved refrigerants: Halogen Free / Environmently friendly: R717 / NH3, R744 / CO2 HCFC: R22 HFC: R404A, R410A, R134A Time between the emitted and received signal Distance or level Coaxial version U: 19.2 in. to 85 in. Cable version U: 31.5 in to 197 in.) Dead zone This depends on the type of probe. (see pages 7 and 8) Liquid dielectric constant (εr) Enclosure IP66/67 ( NEMA type 4x) Cable version to be used in R717 / NH3, HCFC and HFC εr, liquid > 5.6 Coaxial version is mandatory for R744 / CO2 and marine applications εr, liquid > 1.3 Display and User interface (HMI) Display Interface languages Ambient temperature Storage temperature Refrigerant temperature ure Max. working pressure Other conditions Vibration resistance Protection category Process connections Single cable Ø2 mm / 0.08 Coaxial Integrated LCD display pixels in 8-step greyscale with 4-button keypad English (default), German, French, Spanish 40 F / +175 F ( 40 C / +80 C) without HMI display 4 F / +140 F ( 20 C / +60 C) with HMI display F / C The refrigerant temperature can be in the range of -76 F/ 212 F (-60 C/ 100 C), however, the accuracy may be affected if the temperature is not within the below temperature ranges based on the refrigerant. R717 / NH 3 40 F / +122 F ( 40 C / +50 C) R744 / CO 2 58 F / +59 F ( 50 C / +15 C) HCFC: R22 58 F / +118 F ( 50 C / +48 C) HFC: R404A 58 F / +59 F ( 50 C/ +15 C) R410A 58 F / +59 F ( 50 C /+15 C) R134A 40 F /+122 F ( 40 C /+50 C) 14.5 psig / 1450 psig ( 1 barg / 100 barg) EN (1...9 Hz: 3 mm / Hz:1g; 10g shock half-wave sinusoidal: 11 ms) IP 66/67 equivalent to NEMA type 4X (housing) and type 6P (probe) U: ¾ in. NPT U: ¾ in. NPT Electrical connections Power supply Current output load Cable gland Terminals output: V d.c. Min./Max. Value for an output of 22 ma at the terminal. Ambient temperature limitations: 40 F / +176 F ( 40 C/+80 C) : V d.c. 4 F / +176 F ( 20 C/+80 C) : V d.c. RL [Ω] ((Uext -14 V)/20 ma). Default (Error output set to 3.6 ma) RL [Ω] ((Uext -14 V)/22 ma). (Error output set to 22 ma) U: ½ in. NPT Cable entry capacity (terminal) ~20-15 AWG ( mm 2 ) Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H

12 Liquid Level Sensor, U Technical data (continued) Current output Output signal 4 20 ma or ma acc. to NAMUR NE 43 Resolution drift Error signal ±3 μa Typically 75 ppm/k High: 22 ma; Low: 3.6 ma acc. to NAMUR NE 43; Hold (frozen value - not available with NAMURNE 43 compliant output. Minimum power supply voltage Use this graph to find the minimum power supply voltage for a given current output load: Current output load R L [Ω] Power supply U [VDC] Minimum power supply voltage for an output of 22mA at the terminal U connected to PLC 24 V d.c. or 24 V a.c. 50/60 Hz EKC 347 /4100U + PLC Active Analog Input 4-20 ma V d.c. 1st generation ICAD motor for ICM p/n 027H12xx (discontinued Dec. 2009) 2nd generation ICAD motor for ICM p/n 027H9xxx. Introduced Jan Orange White Danfoss M84H0020_1 AKS 41U level probe (previous version) + Alarm relays U connected to EKC V d.c. power supply (customer supplied) (+) ( ) U ma Danfoss M84H0052_1 ICM/ICAD valve position feedback AKV, AKVA or solenoid for on-off control Controller powers the 24V a.c., Max. 20W coil Can also be a 24V a.c. relay to control a solenoid valve. 12 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

13 Technical brochure Liquid Level Sensor, U Quick setup guide for CABLE version Prior to programming the U the below values will be needed which should have been recorded on the setting label during installation and placed on U converter. For more information on these values, please see the measuring range and installation information on p. 7. Probe length Length to 4 ma setting Length to 20 ma setting Note: The signal converter can be programmed with or without mechanical process connector assembled. Steps for quick setup (all values below are only examples) 1. Make sure the power supply is connected to the U. The AKS 4100U can be programmed with or without the signal converter attached to the mechanical process connector. 2. The units in the display can be changed to any of the following: mm, in, ft, m, cm. If the current units do not match the recorded units, press as many times as needed to change to the desired units. For more information about the displayed values, please see display interface on p.5 3. Start quick setup for cable version 5. Enter length to 4 ma scale setting to enter the store/save screen SCALE 4 ma STORE NO in mm to change of SCALE 4 ma. to change the cursor position. to decrease the value or to to confirm and save setting. values to select STORE YES to confirm and store/save The quick setup is now complete and the default screen will be displayed. 6. Enter length to 20 ma scale setting SCALE 20 ma 8. Optional check of setting To check the settings, press mm in times. to change of SCALE 20 ma. to change the cursor position. to decrease the value or to to confirm and save setting. QUICK SETUP? YES NO to enter quick setup PROBE TYPE SINGLE CABLE twice. SINGLE CABLE (0%) 4 ma (100%) 20 ma default screen. 196mm in mm in in mm to return to 7. Store/Save entered values to select single cable version. The following should now be displayed after about 8 seconds: AKS QUICK QUICKSTART SETUP? 4. Enter probe length PROBE LENGTH mm in YES NO to change the PROBE LENGTH. to change the position of the cursor. to decrease the value or to to confirm and save setting Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H

14 Technical brochure Liquid Level Sensor, U Quick setup guide for COAXIAL version Prior to programming the U the below values will be needed which should have been recorded on the setting label during installation and placed on U converter. For more information on these values, please see the measuring range and installation information on p. 8. The units in the display can be changed to any of the following: mm, in, ft, m, cm. If the current units do not match the recorded units, press as many times as needed to change to the desired units. For more information about the displayed valves, please see display interface on p.5 Probe length Length to 4 ma setting Length to 20 ma setting Make sure the power supply is connected to the U. The U can be programmed with or without the signal converter attached to the mechanical process connector. Note: The signal converter can be programmed with or without mechanical process connector assembled. Quick Setup (all values below are only examples) When CO2 is used: Connect the device to the power supply (see the product instruction for detail on electrical installation/connection). 3 times. to change the PROBE LENGTH. to change the position of the cursor. to decrease the value or to QUICK SETUP? YES NO to enter quick setup. PROBE TYPE SINGLE CABLE PROBE LENGTH mm QUICK SETUP COMPLETED IN 8 Wait for QUICK SETUP to complete. Count down from 8 sec. AKS QUICK QUICKSTART SETUP? YES SCALE 4 ma mm to change of SCALE 4 ma. to change the cursor position. to decrease the value or to LIQUID CO2? YES NO (YES) to confirm or to select between STORE NO or STORE YES. Default screen appears: DISTANCE 5000 mm SCALE 20 ma GAS EPS R? mm to change GAS EPS.R. (Select the correct value from the tables on page 16) to change cursorposition. to decrease the value or to to change of SCALE 20 ma. to change the cursor position. to decrease the value or to Quick Setup completed You have the possibility of checking your settings by pressing twice. COAXIAL 2200 mm (0 %) 4 ma 1900 mm (100 %) 20 ma 70 mm 14 DKRCI.PD.SC0.C5.22 / 520H STORE NO to select COAXIAL. and press NO to return to default screen. Danfoss A/S (AC-SMC / MWA),

15 Liquid Level Sensor, U COAXIAL version (continued) Quick Setup (all values below are only examples) For all other refrigerants: Connect the device to the power supply press YES PROBE TYPE SINGLE CABLE 3 times. QUICK SETUP? NO to enter quick setup. to select COAXIAL and LIQUID CO2? YES (NO) to confirm PROBE LENGTH mm NO to change the PROBE LENGTH. to change the position of the cursor. to decrease the value or to SCALE 4 ma mm to change of SCALE 4 ma. to change the cursor position. to decrease the value or to SCALE 20 ma mm to change of SCALE 20 ma. to change the cursor position. to decrease the value or to Wait for QUICK SETUP to complete. Count down from 8 sec. QUICK SETUP COMPLETED IN STORE NO or to select between STORE NO or STORE YES. Default screen appears: DISTANCE QUICK START SETUP 5000 mm Quick Setup completed Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H

16 Liquid Level Sensor, U CABLE and COAXIAL version Forcing ma output (all values below are only examples) Default screen DISTANCE 5000 mm TESTS 4 times to return to default screen. Default screen appears: QUICK SETUP START SET OUTPUT DISTANCE 5000 mm Force ma completed and disabled SUPERVISOR SET OUTPUT 3.5 ma Enter password by pressing the following buttons: to decrease the value or to SET OUTPUT 8 ma INFORMATION 16 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

17 Technical brochure Liquid Level Sensor, U How to change the language setting (Default: English, others: German, French, Spanish) Default screen Enter password by pressing the following buttons: DISTANCE 5000 mm or to see the language possibilities INFORMATION AKS QUICK SETUP START? YES 6 times DISPLAY NO LANGUAGE STORE NO SUPERVISOR LANGUAGE times or to select between STORE NO or STORE YES. Select STORE YES by pressing Default screen appears: LANGUAGE ENGLISH DISTANCE 5000 mm Language setup completed Reset to factory setting Default screen Enter password by pressing the following buttons: RESET FACTORY NO DISTANCE 5000 mm once and SENSOR twice SERVICE twice CONFIG/RESET and confirm 3 times to return to default screen. Default screen appears: DISTANCE 5000 mm RESET FACTORY Danfoss A/S (AC-SMC / MWA), Select YES by pressing with DKRCI.PD.SC0.C4.22 / 520H5916 Factory reset completed 17

18 Liquid Level Sensor, U Appendix1: Dielectric constant (default factory setting = 1.066) The dielectric constant of the refrigerant gas will change based on the temperature in the level column. If the refrigerant temperature is known the corresponding dielectric constant from the tables on p. 19 can be entered into the AKS 4100U to improve the measuring range (see the measuring range and installation information on p. 7 and 8 for more info). For CO 2 (R744) this setting is mandatory in the quick setup procedure. It is optional for refrigerants other than CO 2 (R744). Entering refrigerant dielectric gas constant (all values below are only examples) Default screen DISTANCE inmm 4 times APLICATION GAS EPS. R QUICK START SETUP TRACING VEL. 3 times STORE NO SUPERVISOR Enter password by pressing the following buttons: INFORMATION 2 times GAS EPS. R to change GAS EPS.R. (Select the correct value from the tables on the next page) to change cursorposition. to decrease the value or to GAS EPS. R or to select between STORE NO or STORE YES. Select STORE YES by pressing Default screen appears: DISTANCE in mm Entering the dielectric constant of refrigerant gas completed 18 DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),

19 Liquid Level Sensor, U Appendix1 (continued) Saturated vapour dielectric constant (default value: 1.066) R717 (NH 3 ) range: 76 F +122 F ( 60 C +50 C) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R R22 range: 76 F +118 F ( 60 C +48 C) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R R410A range: 85 F +59 F ( 65 C +15 C ) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R R744 (CO 2 ) range: 56 C +15 C ( 69 F +59 F) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R R134a range: 76 F +122 F( 60 C +50 C) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R R404A range: 76 F +59 F ( 60 C +15 C) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R Danfoss A/S (AC-SMC / MWA), DKRCI.PD.SC0.C4.22 / 520H

20 Liquid Level Sensor, U Appendix1 (continued) R507 range: 76 F +59 F ( 60 C +15 C) [ F] [ C] Dielectric constant of refrigerant gas Parameter GAS EPS.R DKRCI.PD.SC0.C5.22 / 520H5916 Danfoss A/S (AC-SMC / MWA),