Superheat Controller RWR462.10
Contents
1. 06a R407a R407b R407c R408a R409a R410a R410b R417a_ R502 R507 R600 R600a R717 R723 R744 R1270 R290 und R1270 Can only be used for explosion proof valves R717 NH3 Requires the use of valves suited for ammonia e g MVF661 25 If the wrong type of refrigerant is selected the plant can be damaged The temperature can be displayed in C K or F and the pressure in Bar or Psi Configurable are also refer to pages 3 and 4 e Default simple superheat control e External capacity control e Internal capacity control e Two superheat circuits if circuit 2 is enabled Refer to page 11 Parameter mode Parameter list Before switching the refrigeration plant on the peripheral devices should be checked e Temperature and pressure sensors The suction gas temperature TOH the evaporation pressure PO the evaporation temperature TO and in accordance with the configuration the medium temperature TM are displayed in the control mode e Electronic injection valve In the simulation mode the degree of opening MAN EIV of the electronic injection valve can be preset Also it is possible to check whether the valve s actual position EIV agrees with the manually preset position MAN EIV e When the wiring of the plant and all peripheral devices are in order the plant can be switched on The factory set parameters for superheat control XP TN and D the MOP function and the capacity control XP and TN are values gain2. 25 Terminal Assignments X1 24 VDC X2 GND X3 X4 GND X5 GND D1 M D2 M Q14 Q13 Q24 Q13 Y1 Y2 Evaporation pressure Suction gas temperature EIV position feedback signal For configured capacity control External signal DC 0 10 V 4 20 mA Medium temperature For two circuits evaporation pressure For configured internal capacity control Medium temperature For two circuits suction gas temperature Enable for circuit 1 Enable for circuit 2 Compressor 1 circuit 1 Compressor 2 circuit 2 Positioning signal EIV DC 0 10 V Positioning signal EIV DC 0 10 V Power supply AC DC 24 V DC 5 V supply DC 24 V supply Usable range 0 5 10 5 V 3 5 20 5 mA Outside this range the controller locks out 13 22 Building Technologies CE1N3372en_01 15 11 2007 Data sheet HVAC Products Superheat Controller RWR462 10 Connection diagram Connection diagram Commissioning notes Required documentation Refrigeration data Checking installation of peripheral devices 14 22 Building Technologies HVAC Products Pressure sensor with DC 0 10 V signal X1 The following diagram shows example for the wiring of pressure sensor QBE2001 DC 0 10 V signal with 3 wire connection analogue input X1 AG DC 24 V DT JENO X2 XS ENO XS XS ENO BV 240 Active temperature sensors X4 The following diagrams show examples for the wiring of active tempe
3. 4a R406a R407a R40 7b R407c R410b R417a R502 R507 R600 R600a R1270 R290 und R1270 Can only be used for explosion proof valves R401b R401c R408a R409a R717 R723 R717 NH3 Requires the use of valves suited for ammonia e g MVF661 25 The temperature can be displayed in C K or F and the pressure in Bar or Psi EIV opening can be displayed in V or It is possible to configure the following three different applications EN P Y1 PO TOH AL X aia K Superheat Control RWR462 10 pEN N Elv L111 7K A LN Synco i 12 0 10V Saphir P t lt 4 20mA_ and other AL X Y1 POTOH KP third party E controller External Capacity Control RWR462 10 Data sheet Superheat Controller RWR462 10 3 22 CE1N3372en_01 15 11 2007 Internal capacity control Two superheat circuits Note 4 22 Building Technologies HVAC Products TM Medium temperature sensor Ni1000 or temperature sensor with DC 0 10 V 4 20 mA measuring signal 0 10 V7 4 20 mA POTOH KP 7 EN AL X Y1 xI Internal Capacity Control 1 RWR462 10 oN EIV Dx TM lt ll ZPS mes VA l a gt P lt Ni1000 7 EN 7 AL
4. 6 Switch J1 ON OFF To wire the terminals with different types of sensors configure the DIP Switches as follows nC Bit 5 of J1 C EAE Bit7ofJ2 Bit 8 of J2 i of J1 Bit4ofJ2 BitSofJ2 Bit6 of J2 4 20 mA Off 0 10 V Ni1000 Bit1ofJ2 Bit2ofJ2 Bit3 of J2 To meet the plant specific requirements the controller must be configured by author ized staff who must also set the relevant parameters e The project specific data must be transferred to the controller The Installation and User Manual contains the step by step procedure which must be followed e During commissioning fault messages can occur don t pay attention to them On completion of commissioning fault messages must no longer be present e The values and settings entered on the controller are saved in non volatile memory even in the event of a power failure 15 22 i i Data sheet CE1N3372en_01 Building Technologies HVAC Products Superheat Controller RWR462 10 15 11 2007 Selection of refrigerant AN Important Selection of units Selection of application A Icing Checking the peripheral devices 16 22 Building Technologies HVAC Products When starting up the controller for the first time the configuration mode appears First the correct type of refrigerant and the units must be selected The types of refrigerant that can be selected are R22 R23 R134a R152a R170 R290 R401a R401b R401c R402a R402b R404a R4
5. C DC 0 10 V 1 4 11 4 V 10 mV 0 078 V 0 98 mA gt 10 kQ DC 4 20 mA 3 24 MA 0 02 mA 0 3 mA 24 mA 240 Q 50 80 C 60 110 C lt 0 23 K bei 0 C 0 5 K bei 20 C max DC 5 0 V 1 84 2 36 MA potential free gt 8 mA DC 0 10 V DC 1 4 11 4 V 39 mV max 10 mA 300 m also refer to specification of connected unit 300 m 100m total line resistance of 5 5 Q corresponds to an error of approx 1 C 19 22 CE1N3372en_01 15 11 2007 Relay outputs Q14 Q24 Weight excl Packing Dimensions 20 22 Building Technologies HVAC Products Switching capacity of relay contact Q14 Q24 Alternating current AC 24 230 V 3 A res 2 A ind Direct current max DC 30 V max 5A Min contact rating At mains voltage AC 230 V 5 mA At low voltage DC 24 V 10 mA Max starting current T 5A 1s External fuse on input side max 10 A Min Load 100 mA at DC 5 V Initial contact resistance 100 MQ at 1 A 6 VDC Max Switching Rate 300 ops min no load 20 ops min rated load Life of relay contacts AC at0 1 Ares 2 x 10 cycles at 0 5 A res 4 x 10 cycles at 3 A res 1 x 10 cycles Red factor with ind loads 0 85 cos phi 0 8 DC 1 x 10 cycles Expected mechanical life 5 million ops no load Expected electrical life 100 000 ops rated load Insulating strength Between relay outputs and low voltage SELV AC 3750 V to EN 60 730 1 Between relay outputs and adjacent r
6. Mounting and Installation notes 12 O Operating and display elements 8 Operating buttons cece eee cece eee 9 Operating Safety cccccssccsseeeeeeeees 6 Operation ccccceceeeeceeeeeeeeeeeeeaeeees 9 P Parameter mode PARA 6 11 Peripheral devices ccceceeeeeeeeees 2 Pressure SENSO cccceeeeeceeeeeaeeeeees 2 Protective functions compressor 6 R Refrigerant valve ccseceeseeeeeeeeeeees 2 Relay ee 7 Relay outputs Q14 Q24 oo 20 S Selection of application 08 3 Selection of Circuit cccccceeeeeeeees 9 Selection of refrigerant 3 16 Selection of UNItS ccceecceeeeeee eens 3 Simulation mode S MU 00 12 Standard functions ccccseeeeee eens 6 Suction gas temperature TOH 6 Superheat Control cccceceseeeeeeees 5 7 Technical AUS vesctaiticmidicicaniahaortecracs 18 U WS Sie tic ah ve Gial aie Ginna Gah aati an we diahaaeee 1 21 22 CE1N3372en_01 15 11 2007 2006 Siemens Building Technologies 22 22 Subject to alteration Building Technologies Data sheet CE1N3372en_01 HVAC Products Superheat Controller RWR462 10 15 11 2007
7. N OFF Forcircuit2 ON OFF 2 ON OFF sor and Fb EIV EIV feed ON OFF only for Circuit back signal feedback Selection NO simple superheat of applica CAP see Page 3 EXT external capacity control tion INT internal capacity control QBE9101 P10U P30U P60U with X1 4 20 mA output signal QBE9101 Be y P10U P25U P60U with P10U 10 V output signal Ni1000 Ni1000 For ae internal capacity Circ 1 NO 0 10 V 4 20 mA For configured external capacity Circ 1 0 10 V 4 20 mA Types of sensors SENSOR X4 Only for enabled Circuit 2 QBE2001 P10U P25U P60U with 0 10 V output signal or QBE9101 P10U P30U P60U with 4 20 mA output signal LO low limit 90 0 90 0 C 0 1 C Measure RANGE XA OE 22 2 0 1 F ment range HI high limit 90 0 90 0 C 0 1 C 35 0 C 130 0 194 0 F 0 1 F 95 0 F T tempera 3 i of units EIV valve V at i 1 The compressor of Circuit 1 is the default working unit and cannot be disabled EIV feedback signal is only available for Circuit 1 2 Can be parameterized only if external or internal capacity control has been selected in the configu ration mode 3 The range limit RANGE can be configured only if internal capacity control application 3 and X4 have been selected If the wrong type of refrigerant is selected the plant can be damaged Data sheet CE1N3372en_01 Superheat Controll
8. SIEMENS Use CE1N3372en_01 15 11 2007 rele Pep Lie IS Lie ty pt orf 02 03 m m 04 05 xm Digitol isputs A 4 d AC OC 24V SIEMENS _ Poly Cool RWR462 10 PolyCool Superheat Controller RWR462 10 for chillers air conditioning units etc Standalone electronic superheat controller RWR462 10 for use with any type of dry expansion evaporator in refrigeration plants The MOP Maximum Operating Pressure function and the monitoring of sensors and minimum superheat are integrated The controller can be included in the chiller s safety circuit Optionally control of the cooling capacity can be configured It operates on AC DC 24 V All required data are entered on the controller No tools needed The PolyCool superheat controller with its associated components ensures optimum operation of the refrigeration unit j EN a AL X Y1 PO TOH x3 Y1 Superheat Control RWR462 10 Building Technologies HVAC Products Field of use Auxiliary functions Type reference Customized controllers Peripheral devices Siemens HVAC Products AN Important Note 2 22 Building Technologies HVAC Products The controller ensures optimum filling of the evaporator under all load conditions re sulting in low energy consumption Various monitoring functions enhance operating safety and extend the plant s life The cont
9. When feeding an AC DC 24 V signal i e operational status signal from the compres sor to the digital input D1 D2 for circuit 2 the control of the evaporator and the safety functions for the compressor will be activated To ensure the reliability of the refrigeration plant and to prolong the life of the compres sor the following protective functions have been integrated e Minimum limitation of superheat To protect the compressor from shocks caused by liquid refrigerant the valve will be closed in modulating mode when the minimum superheat falls below the selected parameter value MI i e 2 K 3 6 F e MOP function MOP Limitation of the maximum evaporation pressure is another protective function pro vided for the compressor It operates in PI mode and overrides the normal control function to maintain the maximum evaporation temperature When power is supplied to the controller relay Q14 Q24 for circuit 2 will be energized The following actions protect automatic control operation against faults at the universal inputs X_ e Measurement of pressure PO A measured value of lt 0 V or 10 V lt 4 mA or 20 mA produces the following ef fects The alarm icon 30 flashes and the LCD displays ERR in place of the actual value of superheat At and the respective range limit indicator low LO or high HI will flash The controller s output Y1 Y2 for circuit 2 switches to 0 V Relay Q14 Q24 for circuit 2 w
10. XY is KP OO VW WT VV Internal Capacity Control 2 RWR462 10 EN L Y2 7 TIA Y2 Two Superheat Circuits RWR462 10 This controller can be applied to two pure superheat control circuits but only one EIV feedback can be input terminal X3 The simulation mode is possible for one circuit only for simulation mode refer to pages 7 and 12 CE1N3372en_01 Data sheet 15 11 2007 Superheat Controller RWR462 10 Superheat control External capacity control Internal capacity control Building Technologies HVAC Products The superheat controller monitors the temperature differential between the suction gas temperature and the calculated evaporation temperature TOH TO to maintain the adjusted setpoint AT The electronic injection valve is controlled via analogue output Y1 Y2 for Circuit 2 Y EIV A 100 3372D02E 0 AT TOH TO AT SP Setpoint of superheat External capacity control only for one single circuit The capacity of the refrigeration unit drops as the superheat increases Using a DC 0 10 V 4 20 mA signal the setpoint of superheat control can be increased via input X4 The signal is calculated and delivered by an external controller i e Synco Saphir and other third party controller based on the measured medium temperature The setpoint of superheat is increased proportionally as a functi
11. eat Controller RWR462 10 15 11 2007 Technical data A Power supply Power consumption Interrogation rate Display LCD Environmental conditions Degree of contamination Degree of protection Product standards Quality assurance C conformity Standards Connection terminals 18 22 Building Technologies HVAC Products Operating voltage Safety extra low voltage SELV to Frequency RWR462 10 Cycle time Y1 Cycle time Y1 and Y2 together Actual values and setpoints Resolution Analog outputs DC 0 10 V AC 24 V 20 DC 24 V 10 EN 60 730 50 Hz 60 Hz approx 10 VA with full configuration 0 58s 0 58s 4 digits 0 1 2 digits resolution 0 1 V 1 Digital switching outputs off on Transport IEC 60721 3 2 Class 2K3 Temperature range 25 C 70 C Humidity lt 95 r h Mechanical conditions Class 2M2 Operation IEC 60721 3 3 Class 3K5 Temperature 5 C 50 C Humidity lt 95 r h non condensing Storage temperature 20 C 70 C Normal contamination EN 60 730 Casing Front Automatic electrical controls for household and similar use Energy management equipment Production and customer service IP 20 to EN 60 529 IP 40 to EN 60 529 EN 60 730 1 UL 916 to ISO 9001 According to the directives of the European Union Low voltage directive EMC directive Electromagnetic compatibility Immunity Emission Plug in screw terminals for Wires Number of wires
12. ed from practical experience The Installation and User Manual contains detailed information about how the controller can be fine tuned to achieve optimum performance Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Fault status signals Building Technologies HVAC Products AZ Should faults or malfunctions on the controller valve or sensors occur the alarm Ls icon will flash and the LCD displays ERR or FAIL in place of the corresponding parame ter The following list shows the possible causes and how the faults can be rectified Passive temperature Measured value flashes Sensor cable with an open circuit not con sensor Ni1000 Display FAIL nected or a short circuit Measured value flashes Measured value lt TL Display ERR LO Measured value flashes Measured value gt 80 C Display ERR HI Active temperature Measured value flashes Measured value lt 0 5 V or 3 5 mA in exter sensor with DC Display ERR LO t trol 0 10 V 4 20 mA nal capacity control oi Measured value lt 0 V or 4 mA in internal other DC 0 10 V capacity control with active temperature 4 20 mA signal sensor transmitters Synco Measured value flashes Measured value gt 10 5 V or 20 5 mA in Saphir and other Display ERR HI external capacity control third party controller Measured value gt 10 V or 20 mA in internal capacity control with active temperature sensor Pressure sensor Measured val
13. elays AC 3750 V to EN 60 730 1 Controller excl terminals 0 334 kg incl terminals 0 396 kg easaes Outputs RS 4 Rude i Yi KAN Jat B E hed e Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Index Building Technologies HVAC Products A Analog inputs X1 X5 eeseeeeeeeees 19 Analog outputs Y1 Y2 cc6 19 Auxiliary fUNCtIONS ccceeeeeeeeeees 2 C Cable Temperature Sensor 2 CASING era ia E 8 Checking the peripheral devices 16 Commissioning notes c 00000 14 Config and parameter settings 15 Configurable functions c008 3 Configuration mode CONF 10 Configuration of DIP Switches 15 Connection diagram 0ccccseeeees 13 D IGM DUE senate ret are ieee 6 Digital inputs D1 D2 ee 19 DIMENSIONS ccssccseeeceeeeseeeeeeeess 20 E Electrical installation 000 12 Electronic Injection Valve EIV 2 ENADIG aura nectilie Mirte trast etal 6 Evaporation pressure PO 06 6 External capacity control 05 5 F Fault status signals ccscccseeees 17 Forced opening of the valve 7 l ICID eoon 11 Internal capacity control 0006 5 Data sheet Superheat Controller RWR462 10 M Mechanical design c ceseeeseeeeeees 8 Medium temperature TM 06 7
14. er RWR462 10 15 11 2007 Parameter mode Adjustment of all setpoint and parameters such as proportional band integral action PARA time etc for the operation safety controls superheat capacity controller and the MOP function The setpoint of the MOP function must be adjusted as specified by the supplier of the compressor or as demanded by the application Parameter list Function Adjustable Range 6 0 K 0 16 0K 0 1K eeu arenes 10 8 F 0 28 8 F 0 1 F AT 2 160K 1K Superheat P band 5 3 PID 288 F 1 F sequence Integral action time 0 600 s 10 min 1s o Maximum setpoint SMX 18 K 0 50 0 K 0 1K change with superheat 32 4 F 0 90 0 F 0 1 F _Extemal signal direcion so am pas Setpoint of medium 6 0 C 45 0 90 0 C 0 1 C Capacity temperature TM 42 8 F 49 0 194 0 F 0 1 F ee 35K 2 160K 1K 63 F 3 288 F 1 F Integral action time TN s 0 600 s 10 min 1s Nae imitation 15 0 C 45 0 35 0 C 0 1 C 59 0 F 49 0 95 0 F 0 1 F 2 160K 1K 3 288 F 1 F Integral action time 0 600 s 10 min 1s Valve startup delay time 0 30s 18 Valve startup opening limit 0 50 1 SAFETY Pressure sensor alarm ignoring 55 0 30s 15 Operation time when controller startup safety Low limit for d meas 40 C 50 40 C 1 C pote urement 40 F 58 40 F 1 F Minimum superheat AT EE 3 gt Notes 1 Can be
15. g to EN 60 742 They must be designed for 100 duty When using several trans formers in the system terminals GO must be galvanically interconnected e f voltages of more than AC 24 V 20 DC 24V 10 are fed to the low voltage terminals the controller or other connected devices can be damaged beyond repair Also voltages exceeding 42 V represent an electric shock hazard e Mains voltages up to AC 250 V may only be fed to the potential free contact Q13 Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Connection diagram A Please do not connect M with GND Wiring must be made in compliance with the following connection diagram Digital Inputs PolyCool Superheat 3372A02 Universal Input RWR462 10 Analog Outputs fy tly AC DC 24 V l M1 M2 G Y G Y G0 U G0 U Y1 Y2 GO l e L N e Pressure sensor e g QBE9101 P10U Temperature sensor QAZ21 682 101 Only if capacity control is configured Active temperature sensor Signal transmitter DC 0 10 V 4 20 mA For two circuits Pressure sensor e g QBE9101 P10U Temperature sensor QAZ21 682 101 only required for capacity control and two cir cuits Enable circuit 1 Enable circuit 2 Compressor 1 circuit 1 Compressor 2 circuit 2 Electronic injection valve EIV e g MVL661 or MVF661 25 For two circuits 2 Electronic injection valve EIV e g MVL661 or MVF661
16. he operational status signal D1 is present For safety reasons the normal control mode is automatically re sumed after 15 minutes At this mode a variable opening of the electronic injection valve can be enforced The default value is 5 V which complies with a valve opening degree of 50 and allows a manual entering of any value between 0 and 10 V increment 0 1 V In this mode all current input and output variables of the superheat and capacity con trol can be displayed Mounting and Installation notes Controller Electrical installation A 12 22 Building Technologies HVAC Products For mounting and electrical installation the following notes should be observed A Mounting on DIN rail ni No additional parts are required H B Wall mounting b r L With four ellipse screws for holes with diameter of al 4 4mmx6 mm C Flush panel mounting With HVAC Products ARG462 10 mounting kit Mounting Instruction M 3351 1 The wiring can be made with standard cables Shielded cables are recommended only if the controller is exposed to strong electromagnetic fields EMC e The PolyCool RWR462 10 controller operates on AC DC 24 V max 10 VA extra low voltage and is short circuit proof e The operating voltage must satisfy the requirements for safety extra low voltage SELV conforming to EN 60 730 e The transformers used must be safety transformers with double insulation conformin
17. ignal Replacement sensor for service QBE2101 P10U P30U P60U QBE2001 P10U 1 9 bar DC 0 10 V output signal QBE2001 P25U 1 24 bar DC 0 10 V output signal gt 1907 QBE2001 P60U 1 59 bar DC 0 10 V output signal Type QBE2001 P60U available on request Refrigerant valve PN 40 Electronic Injection Valve EIV MVL661 MVF661 25 DC 0 10 V input signal 4714 4716 The controller and the above mentioned peripheral devices have been matched to the application covered by this data sheet Therefore valve and sensors may not be re placed by products of other manufacture Safety transformer 25 VA to EN 60 742 is not included in the delivery Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Configurable functions Selection of refrigerant A Important Selection of units Selection of application For the default Pure superheat control External capacity control Building Technologies HVAC Products The controller s functions are preconfigured By changing the parameters the functions can be matched to the type of plant Control of the evaporator is based on true superheat control For this purpose pressure PO acquired at the evaporator output is converted to the respective temperature of the refrigerant used The controller contains the polynomials of the following types of refrigerants R22 R402a R410a R744 R23 R134a R152a R170 R290 R401a R402b R40
18. ill be de energized When returning to the normal operational values relay Q14 Q24 will automatically be energized again e Measurement of suction gas temperature TOH For any short circuit or open circuit detected The alarm icon 0 flashes and the LCD displays FAIL in place of the actual value of superheat At e A measured value of lt TL or 80 C will produce the following effects The alarm icon amp S flashes and the LCD displays ERR in place of the actual value of superheat At and the respective range limit indicator low LO or high HI will flash e When any of the alarms above is detected The controller s output Y1 Y2 for circuit 2 switches to 0 V Relay Q14 Q24 for circuit 2 will be de energized Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Medium temperature TM Relay Q14 Q24 Alarm relay Forced opening of the valve A Important Building Technologies HVAC Products e External capacity control DC 0 10 V 4 20 mA signal from an external controller Synco Saphir and other third party controller based on the measured medium temperature A measured value of lt 0 5 V or 10 5 V lt 3 5 or 20 5 mA produces the following effects The alarm icon amp flashes and the LCD displays ERR in place of the actual value of superheat At and the respective range limit indicator low LO or high HI will flash The controller s output Y1 switche
19. on of the voltage at input X4 The maximum increase SMX corresponds to DC 10 V 20 mAor0 V 4 mA based on the configuration of external signal direction SD and can be entered in the parameter mode The setpoint used for superheat control represents the sum of the setpoint of overheat AT SP entered in the parameter mode plus the increase Internal capacity control only for one single circuit The temperature of the medium is acquired via an input Depending on the configura tion of input it is possible to choose a passive Ni1000 sensor X5 or an active DC 0 10 V 4 20 mA sensor X4 The measurement range of the active sensor can be set between 99 9 C and 99 9 C Internal capacity control controls the medium temperature TM according to the setpoint CAP SP entered in the parameter mode in that it reduces the capacity of the refrig eration unit by increasing the setpoint of superheat control The maximum increase SMX is entered in the parameter mode SMX ar cap sp M Setpoint medium temperature 5 22 Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Standard functions Enable Digital input D1 D2 Protective functions for the compressor Operating safety Evaporation pressure PO Suction gas temperature TOH 6 22 Building Technologies HVAC Products In general the control and monitoring functions are enabled by an operational status signal received from the plant
20. parameterized only if external or internal capacity control has been selected in the configu ration mode 2 SD can be parameterized only if external capacity control has been selected in the configuration mode SD 1 means that 0 V 4 mA corresponds to max cooling capacity SD 1 means that 0 V 4 mA corresponds to min cooling capacity 3 Can be parameterized only if internal capacity control has been configured 4 Operation safety control 5 An alarm will display if the measured temperature value is over this limit Valve Opening Degree VO Control Mode ZN Icing Capacity control is accomplished by increasing the superheat For this reason a reduc tion in capacity is always associated with a drop in the evaporation temperature In the case of chillers with no frost protection additives or direct expansion air coolers there is thus a risk of icing under part load conditions 11 22 Building Technologies Data sheet CE1N3372en_01 HVAC Products Superheat Controller RWR462 10 15 11 2007 Simulation mode SIMU Parameter list A Important Regulation mode In simulation mode the valve can be opened for service purposes The position feed back signal and the values of pressure and temperature can be displayed Function Factory Selectable Function Parameter Code setting Range step Valve manuallly valve opening MAN EIV OV 0 10V 0 1V In simulation mode the supervisory functions are active only if t
21. r REFRIG CONF agm meot N dd CAP SIMU 0K c1 i Ta mj C FK SENSOR Operational i RANGE 7 MOP C FK 2 PO i Bar Psi SAFETY 5 Ev VSec MAN EIV ESC Digital Outputs AC24 230V Analog Outputs ee a a LEDs 2 2 e 2 2 2 e Magde telee er LCD The LCD displays e The current operational data e The function code and the icons SAL Icons ALS Alarm indicates any fault detected when flashing continuously Okay indicates that the system works well when lit Compressor indicates the compressor is disabled when flashing e oaen indicates the controller is communicating with others when lit not active in this version Status of LEDs LED red above and LED green below indicates the controllers operating status Status Bedeutung LED green ON Power on LED red flashing every 1 second and Alarm LED green ON 8 22 Building Technologies Data sheet CE1N3372en_01 HVAC Products Superheat Controller RWR462 10 15 11 2007 Operating buttons 64 30 Operation Selection of operation mode A Important Exception Selection of Circuit Enabling Disabling the Circuit Building Technologies HVAC Products To operate the controller use the operating buttons on the controller front The operat ing buttons provide the following functions e Use the ox button to enable changes or confirm a change e Use the buttons to change flashing data or select the information sc
22. rature sensors with 3 wire and 2 wire connections analogue input X4 Active temperature sensor with DC 0 10 Active temperature sensor with 4 20 mA V or 4 20 mA signal 3 wire connection signal 2 wire connection AC DC 24V AC DC 24 V X1 GND X2 X3 GND X4 X5 GND SV 24V _ pc YY To commission the controller the following pieces of documentation are required e The Installation and User Manual CE1U3372XX H 74 319 0555 0 supplied with the controller e The plant connection diagram and all other control documentation kept in the control panel or by the plant operator To configure the PolyCool RWR462 10 control loops and to set the relevant parame ters the following plant data are required e Type of refrigerant used R22 R134a etc e Design data of evaporator superheat max evaporation temperature MOP Before applying power to the controller AC DC 24 V the installation must be checked to make certain it is wired according to the connection diagrams Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Configuration of DIP Switches For X1 For X2 For X3 For X4 For X5 Configuration and parameter settings Notes Configuration of DIP Switches for analogue inputs X The default factory settings of DIP switches at the rear top of the controller are pre sented as follows Bit 1 of J2 is used for factory calibration ON DIP 12345
23. reen e Press the lt ESc gt to exit out of the current level and back to the previous one A flashing display indicates adjustable data For the configuration and fine tuning of the superheat controller there are different operating levels and operating modes available In normal operation PolyCool is in the regulation mode Follow procedures below to access the operation mode as appropriate Operating modes Procedures In regulation mode simultaneously press down the and buttons for at least five seconds Press lt OK gt to confirm when C1 is flashing Select the mode with and press lt OK gt to proceed Or press lt ESC gt to exit out of the current operation level Configuration mode Parameter mode Simulation mode The circuit can only be enabled or disabled in the configuration mode The simulation mode SIMU is only applicable to Circuit 1 If the controller has already been configured the regulation mode will automatically be activated when switching on From any other mode the controller will automatically return to the Regulation mode after 15 minutes Before accessing the specific operation mode users are required to specify the circuit By default circuit 1 is selected and cannot be disabled If settings in the configuration mode are changed while the controller is in operation does not apply to units controller output Y1 Y2 for circuit 2 will switch to O V In that case the con
24. roller has been designed for use with all standard types of dry expansion evaporators such as plate tube and fin heat exchangers and is therefore especially suited for integration in chillers air handling units etc Auxiliary functions enhance efficiency and supervision of the refrigeration plant e Enabling operation via a digital input e g by any operational status signal from the compressor e Selection of different types of refrigerants e Conversion of pressure to the respective temperature of the selected refrigerant e Display of all measuring variables and of the valve s manipulated variable e Integrated cooling capacity control e Two superheat circuits e Sensor monitoring e Compressor safety controls Analog Digital Digital Siemens HVAC Products also supplies customer specific controllers that differ from the standard products in terms of refrigerant selection and or outer appearance Please contact us if you require customized products Outputs Digital Type reference RWR462 10 The PolyCool superheat controller uses two types of sensors and one valve made by Siemens HVAC Products Field devices Data sheet no e Cable Temperature Sensor QAZ21 682 101 LG Ni 1000 measurement range 50 80 C 1848 e Pressure Sensorr QBE9101 P10U 1 9 bar DC 4 20 mA output signal QBE9101 P30U 1 29 bar DC 4 20 mA output signal gt 1908 OEM QBE9101 P60U 1 59 bar DC 4 20 mA output s
25. s to 0 V Relay Q14 will be de energized Internal capacity control with active sensor DC 0 10 V 4 20 mA signal from an external controller Synco Saphir and other third party controller based on the measured medium temperature A measured value of lt 0 5 V or 10 5 V lt 3 5 or 20 5 mA produces the following effects The alarm icon 0 flashes and the LCD displays ERR in place of the actual value of superheat At and the respective range limit indicator low LO or high HI will flash The controller s output Y1 switches to 0 V Relay Q14 will be de energized Internal capacity control with passive sensor or two circuits with passive sensor Signal from a passive temperature sensor Ni1000 For any short circuit or open circuit detected The alarm icon 0 flashes and the LCD displays FAIL in place of the actual value of superheat At A measured value of lt TL or gt 80 C will produce the following effects The alarm icon LS flashes and the LCD displays ERR in place of the actual value of superheat At with the respective range limit indicator low LO or high HI will flash When any of the alarms above is detected The controller s output Y1 Y2 for circuit 2 switches to 0 V Relay Q14 Q24 for circuit 2 will be de energized Relay contact Q14 Q24 for circuit 2 is controlled by the safety functions Depending on the circuitry this changeover contact can be used either for act
26. trol will be released again only after all following parameters have been enabled by pressing the lt ESC gt button on the right controller must be brought into the Regulation mode Before configuring the controller you need first specify and enable if needed the cir cuit C1 or C2 as appropriate By default C1 is the working system and cannot be disabled After selecting the circuit go to the configuration mode CONF and select the lt ENABLE gt lt COMP gt parameter Set the parameter value as ON or OFF by pressing ENABLE CONF R 9 22 Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Configuration mode CONF Notes Parameter list LN Important 10 22 Building Technologies HVAC Products Following the initial power up the controller automatically enters the configuration mode In this mode the type of refrigerant is selected and the unit of temperature C or F and pressure Bar or Psi determined Optionally control of the cooling capacity can be configured To reconfigure the controller refer to Selection of operation mode above Parameter z Default R23 R134a R152a R170 R290 R401a R401b R401c R402a R402b Selection of R404a R406a R407a R407b R407c eiceta R408a R409a R410a R410b R417a g R502 R507 R600 R600a R717 R723 R744 R1270 Enable For circuit 1 ON EN disable compres compres ENABLE sor Forcircuit2 O
27. uating a separate alarm horn or for integration in the compressor s safety circuit In the simulation mode the required valve opening default value 0 can be entered on the user interface This is very helpful when filling the plant with refrigerant for short time emergency operation service work etc In this operating mode the minimum superheat is monitored In the simulation mode the supervisory functions are active only if the operational sta tus signal D1 D2 for circuit 2 is present For safety reasons the normal control mode is automatically resumed after 15 minutes 7 22 Data sheet CE1N3372en_01 Superheat Controller RWR462 10 15 11 2007 Mechanical design Casing The RWR462 10 is a compact controller conforming to DIN 43 880 Gr 1 housed in a closed plastic casing Mounting choices The superheat controller can be mounted in the control panel in one of the following ways e In a standard control panel conforming to DIN 43 880 e Wall mounting on top hat rails which are already fitted EN 60715 TH 35 7 5 e Wall mounting with two fixing screws e Flush panel mounting with the help of the ARG462 10 mounting kit Connection terminals Plug in screw terminals Operating and The RWR462 10 is operated with the operating elements located on the unit front No display elements aids such as a PC tool are required Jeee G aelel elo eaeoe ojejo pea pr eeren keene e ACIDC24V Digital Inputs Universal Inputs AT w
28. ue flashes Measured value lt 0 V or 4 mA depending on Display ERR LO the type of pressure sensor Measured value flashes Measured value gt 10 V or 20 mA depending Display ERR HI on the type of pressure sensor Electronic injection No position feedback signal Connecting cable for feedback signal with an valve EIV 0V open circuit not connected Valve does not open Connecting cable not connected In the simulation mode the valve can be checked by manually entering the degree of opening and by comparing it with the position check back signal Valve faulty Position feedback signal Cable for feedback signal not connected for does not match the manu connection terminals refer to data sheet ally entered degree of Open circuit or valve faulty opening Icing of evaporator when Valve faulty valve is closed Electronic calibration of valve not correct Valve does not fully close possibility of dirt inside the valve Controller No display Check power supply AC DC 24 V Manipulated variable Short circuit sensor with open circuit always 0 V Y1 No enabling via D1 D2 for circuit2 Controller faulty Icing of evaporator with no Controller output Y1 is not 0 V Controller enabling via D1 D2 for faulty circuit 2 External noise voltage on the signal line to the EIV For any faults about the enabling signal D1 D2 the compressor icon will flash simultaneously 17 22 Data sheet CE1N3372en_01 Superh
29. x wire gage Data sheet Superheat Controller RWR462 10 73 23 EEC 89 336 EEC EN 61 000 6 2 2001 EN 61 000 6 3 2001 min 0 75 mm 2x 1 5 mm oder 1 x 2 5 mm CE1N3372en_01 15 11 2007 Analog inputs X1 X5 Signal 0 10 V Signal 4 20 mA Temperature signal Digital inputs D1 D2 Analog outputs Y1 Y2 Cable length Analog signals Digital signals Temperature signals Building Technologies HVAC Products Measurement values X1 Pressure sensor X2 Temperature sensor LG Ni 1000 X3 Position feedback signal valve X4 Medium temperature X4 External signal X4 Pressure sensor for circuit 2 X5 Temperature sensor LG Ni 1000 X4 According to the configuration Range Under and over range Resolution Accuracy of RWR462 10 Max current drawn Internal resistance R Range Under and over range Resolution Accuracy of RWR462 10 Max current drawn Internal resistance R Range Under and over range Resolution Accuracy of RWR462 10 Measuring voltage Measuring current Switching contacts Current from the controller Voltage modulated VM range Under and over range Resolution Current Max permissible cable length For 0 75 mm Max permissible cable length For 0 75 mm Max permissible cable length For 0 75 mm Data sheet Superheat Controller RWR462 10 DC 0 10 V 4 20 mA C DC 0 10 V 4 20 mA DC 0 10 V 4 20 mA DC 0 10 V 4 20 mA DC 0 10 V 4 20 mA
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