User manual
Contents
1. Address SWI SW2 Selection 0 0 0 reserved 1 1 0 Address 1 2 2 0 Address 2 9 9 0 Address 9 10 A 0 Address 10 11 B 0 Address 11 12 C 0 Address 12 13 D 0 Address 13 14 E 0 Address 14 15 E 0 Address 15 16 0 1 Address 16 17 1 1 Address 17 246 6 F Address 246 247 7 F Address 247 248 8 F reserved 249 9 F reserved 250 A F reserved 254 E F 9600 Baud 255 F F 19200 Baud Tab 5 a ADDRESS 254 14 15 X16 Fig 5 a As an example address 254 is reserved for setting the Baud rate to 9 600 bits per second To choose a baud rate select the address and reset the gas detector by shorting jumper J4 or by cycling the power ON and OFF The desired Modbus address 1 247 can subsequently be selected During a setting Baud rate leds will blinking green 9600 e red 19200 Address SWI SW2 254 F Selects 9 600 Baud bits per second 255 E Selects 19 200 Baud bits per second Tab 5 b Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 20 Specifications Baud Rate 9600 19200 bits per second selectable using the address rotary switches Start 1 1 bit Data 8 8 bits Parity 0 0 bit Stop 2 2 bits Retry 500 500 milliseconds minimum time between retries End of message 3 5 3 5 characters a silent of 3 5 characters indi cates the end of a message a new message can begin after this interval Tab 5 c Function Codes Function c2. Vs ejP3 EN J7 J8 J9 J10 a O EN BR o 10 5 10 a 44 4 Max load AC e N ES GND o ce 2 1A 24V mopgus TX TR CN2 CN3 LETER GNX V I N O COM N C 24Vac transformer 230Vac line Fig 2 0 15 Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL 3 CHECK AND CALIBRATION PROCEDURE 3 1 General warnings The frequency and nature of testing or calibration may be determined by local regulation or standards EN378 and the FGAS Regulation require an annual check in accordance with the manufacturer s recommendation Carel recommends annual checks by bump test and gas calibration on site at two yearly intervals or as required by test in the case of semiconductor SC sensors and infrared IR sensors with element sensor replacement every five years or as required This should eliminate end of life concerns and constantly renew the detection system If the Detector is exposed to a large leak it should be tested to ensure correct functionality by electrically resetting the zero setting and carrying out a bump test see procedures below Important The testing and or calibration of the unit must be carried out by a suitably qualified technician and must be done e in accordance with this manual e in compliance with locally applicable guidelines and regulations Suitably qualified operators of the unit should be aware of the regulations and standards set down by the industry country for t
3. Gas Leakage Detector C AR 5 Electronic fixed gas leak detectors with LED indicators for Power and Alarm En User manual E PA READ AND SAVE THESE INSTRUCTIONS READ CAREFULLY IN THE TEXT High Efficiency Solutions CAREL IMPORTANT CAREL bases the development of its products on decades of experience in HVAC on the continuous investments in technological innovations to products procedures and strict quality processes with in circuit and functional testing on 100 of its products and on the most innovative production technology available on the market CAREL and its subYESdiaries nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the final application despite the product being developed according to start of the art techniques The customer manufacturer developer or installer of the final equipment accepts all liability and risk relating to the configuration of the product in order to reach the expected results in relation to the specific final installation and or equipment CAREL may based on specific agreements act as a consultant for the poYEStive commisYESoning of the final unit application however in no case does it accept liability for the correct operation of the final equipment system The CAREL product is a state of the art product whose operation is specified in the technical documentation supplied with the product o
4. version version R407c R410a NH3 CO R134A Ethylene R404a R407a R410a Power supply 12 24V 20 dc ac 50 60 Hz Power consumption at 12V 153mA 136mA Monitoring active Green LED Alarm display Red LED Audible alarm enabled disabled Fault during monitoring Red LED ON Green OFF Fault status 1V 2mA 1V 2MA Analogue output 0 5V 1 5V 0 10V 2 10V 4 20mA Serial communication Modbus RS485 Digital output 1 relay rated at 1 A 24 Vdc ac Selectable delay 0 1 5 10min IP protection IP41 built in version IP66 IP66 built in and remote remote sensor version sensor Typical operating range 0 1 000 ppm 0 10 000 ppm Operating conditions 201502C 40T50 C 20T50 C Non condensing humidity 0 to 95 Estimated sensor life 5 8 years Alarm threshold 100 ppm 1500 ppm 100 ppm Reset time 600 s 2105 Linearity on calibration field Operating range lt HCFC 10 to 1 000 ppm semiconductor vers e HFCs 10 to 1 000 ppm semiconductor vers lt Carbon Dioxide 0 to 10 000 ppm infrared vers Tab 1 c Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 1 6 Dimensions and mounting Version IP44 Mounting 5 mm Max 103 50 8 0 td y e 120 120 25 00 _ 36 00 25 00 Fig 1 a Dimensions Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 120 mm CAREL Version IP66 Mounting and Dimensions 122 mm mounting measurements 123 mm 144 mm moun
5. Gas Detector must have been powered up and allowed to stabilize 2 10 Trouble Shooting All Carel Gas Detector units are checked and calibrated before shipment Symptom Green Red light on sensor is not lit Possible cause power supply Possible wiring fault Check power supply check your wiring Carel Gas Detector possibly damaged in transit Check by installing another Carel Gas Detector to confirm fault If you experience spurious alarms in the absence of a leak contact us for instructions and support During operation record any alarms Establish the cause or likely cause if no leak has occurred Report these occurrences to your supplier or Carel and we will advise on corrective measures ES ES J Max 300 mm i Max 1500 mm USG sui Per gas NH3 ETHYLENE h max 300mm from ceiling CAREL 2 11 Electrical connection diagram examples TN 000 000 Lt A digital output G PANG T UN FL 000 000 A ys Fig 2 9 Fig 2 h Access Point RS485 Modbus other third party devices ui ev 000 000 nc 11 Note check compatibility with the application on th
6. NO Output is closed fault detected l 303 Red LED 0 1 11 Red LED is on Alarm Indication or Fault Indica Ifthe gas level exceeds the Normal Alarm Threshold Register 200 tion if green LED is off De energise relay NO Output is open 0 Red LED is off No alarm or fault condition exists 304 Green LED 0 1 1 Green LED is on Power indicator detector powered on 0 Green LED is off No power or fault condition if the red LED is on from revision 2 025 305 Reserved reserved for future use 306 Reserved reserved for future use 307 Warning 0 1 This is only operations if registred 403 is set to 1 Threshold 1 gas concentration is greater than or equal to Exceeded the Warning Threshold 0 gas concentration is less than the Warning Threshold Tab 5 g Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 24 CAREL 5 4 Variable list Analogue Input Registers read only Function Code 04 Register Description Range Unit 100 Concentration gas level of full scale 0 100 101 Concentration gas level in ppm 065 535 ppm 103 Full scale sensor level in pom 0 65 535 ppm 104 Alarm set point of Full Scale 0 100 105 Sensor timer 0 65 535 hours 106 Detector address 1 247 107 Software version 10 108 Detector Code 270 109 Order Number 300 Tab 5 i Analogue Output Holding Registers readable amp writable read Function Code 03 write Func
7. Output Status Flags read Function Code 01 Output Status Flags are readable write Function Code 05 amp writable Register Description Range Details 400 Sounder Flag 10 1 1 Sounder is on Monitor Gas Concentration 0 Sounder is off 401 Test Flag 0 1 1 Sensor on operating for more than 1 year and requires testing 0 Sensor does not require testing yet from revision 2 025 Warning 402 failsafe relay 0 1 1 Failsafe relay operation see table for Threshold Enabled Enable relay logic Register 403 1 0 Standard relay operation default 403 Warning 0 1 1 Warning threshold operation is Enabled enabled YES 0 Warning threshold operation is disabled default 404 Warning 0 1 1 gas concentrations in excess of the Read Warning Threshold register 203 Activates Relay Warning Threshold Register 203 will activate the relay 0 gas concentrations in excess of the Alarm Threshold Register 200 will activate the relay default Tab 5 h NO Concentration gt Warning Threshold Failsafe Relay Enabled Register 402 and Warning Activates Relay Register 404 The operation of the relay is dependent on the following e Failsafe Relay Enabled Register 402 e Warning Activates Relay Register 404 e Gas level Register 100 or Register 103 e Warning alarm threshold Register 203 e Alarm set point Register 104 or Register 200 If Failsafe Relay Operation is disabled Register 402 0 defau
8. The device powered at low voltage features low power consumption and can be confi gured with 16 different signals 8 sounds with light on steady and 8 sounds with flashing light The signal can be confi gured during installation using two switches SWA and SWB Operation should be tested at least once a year For more information see technical leaflet 4050001415 19 Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL 5 MODBUS RTU PROTOCOL 5 1 Modbus RTU Remote Terminal Unit Protocol Connector CN4 labelled and GNX is an RS 485 port for communicating with the CAREL gas detectors in Modbus RTU protocol is the noninverting data signal is the inverted data signal and GND is the board ground plane 5 2 Address There are 256 selections and the addresses are numbered O to 255 inclusive Addresses are selected by rotating the hexadecimal dial switches SW1 and SW2 Values 1 to 247 are valid usable addresses providing a unique identity for each gas detector Addresses 248 to 255 and address O are reserved for implementing specific features Modbus data with a zero in the address field is received by all detectors irrespective of the address selected by the dial switches to enable the master device to broadcast simultaneously to all the detectors Switch SW selects addresses 0 to 15 and switch SW2 multiplies the address by a factor of 16
9. detected concentration in parts per million CAREL Full Scale Sensor Level in ppm Register 103 The full scale sensor level is the maximum detectable gas concentration for the detector This maximum rating is stored in register 103 so for the example register 103 holds the value 1000 to represent 1000 parts per million ppm Gas concentration ppm Full scale 100 Wo 1000ppm _____ Alarm ON Alarm Set point 200 ppm 20 Wo lA Alarm OFF Fig 5 b P GO AS A ENER eno Set alarm Alarm Alarm delay l Fig 5 C Alarm Set Point of Full Scale Register 104 The Alarm Set Point is the threshold at which the gas concentration has reached a level to warrant the activation of the Alarm flag by setting a 1 in register 300 the red LED alarm visual indicator and the relay and sounder If a delay period is set in registers 201 the relay and the sounder will not be immediately activated but the red LED be illuminated and the Alarm Flag will be set The duration of the delay will be measured from this instance that the gas concentration exceeds the alarm set point The Alarm Set Point can be controlled using the detector hardware by adjusting the potentiometer P1 and monitoring the voltage on test point TP1 with respect to test point TP3 0 Volts Alternatively a software value can be written into register 200 and the hardware potentiometer setting is disregarded until the software value is reset back to zero so although r
10. e Make sure that pits stairwells and trenches are monitored since they may fill with stagnant pockets of gas e If a pressure relief vent pipe is fitted to the system it may be a requirement to mount a sensor to monitor this vent pipe It should be positioned about 2 m above the pressure relief vent to allow gas clouds to form e With racks or chillers pre fitted with refrigerant sensors these should be mounted so as to monitor the compressors or if extract ducts are fitted the airflow in the duct may be monitored 2 6 Refrigerated Spaces In refrigerated spaces sensors should be located in the return airflow to the evaporators on a sidewall below head high preferred or on the ceiling not directly in front of an evaporator In large rooms with multiple evaporators sensors should be mounted on the central line between 2 adjacent evaporators as turbulence will result in airflows mixing 2 7 Chillers It is difficult to monitor reliably for leaks outdoors At a minimum you should monitor the compressors as the general consensus is that most leaks occur in that area Many chiller manufacturers regard this as meeting the requirement 1 Install a standard sensor in enclosed machinery sections in the compressors enclosures or behind protective baffles such as acoustic panels 2 Lastly you may wish to consider an airflow sensor in a start up fan section especially where slow speed fans or variable speed drives are used as they are
11. likely to draw any leaked refrigerant through the sensor Purchasers of chillers would prefer the detection system to be already fitted If not they can purchase fixed refrigerant monitors which are also used for retrofit Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 2 8 Air Conditioning Direct systems VRF VRV EN378 states that at least one detector shall be installed in each occupied space being considered and the location of detectors shall be chosen in relation to the refrigerant and they shall be located where the refrigerant from the leak will collect In this case refrigerants are heavier than air and detectors should have their sensors mounted low e g at less than bed height in the case of an hotel or other similar Category Class A spaces Ceiling or other voids if not sealed are part of the occupied space In a hotel room monitoring in ceiling voids would not strictly comply with EN378 Dos e mount the in room sensor at less than the normal heights of the occupants e g in a hotel room this is less than bed height between 200 500mm off the floor e away from draughts and heat sources like radiators etc e avoid sources of steam Don ts Do not mount sensors under mirrors at vanity units in or near bathrooms Tab 2 a For further detailed Installation tips covering most installations and equipment types chillers air cooled chillers etc see our web site www carel com 2 9 T
12. per million ppm If the operation of the Warning Threshold is enabled register 403 is set and the gas concentration exceeds this threshold then the Warning Threshold Exceeded register 307 flag will be set to 1 If the above conditions have been met and the Warning Activates Relay flag register 404 is set then the relay will also be activated Note Relay operation is dependent on the value of the Failsafe Relay Enabled flag register 402 See below for further details The Warning Threshold must be less than or equal to Normal Alarm Threshold If the Warning Threshold is attempted to be programmed to a value greater than the Normal Alarm Threshold then it will remain at the previous setting IF the Warning Threshold has been programmed and then the Normal Alarm Threshold is changed to a level less than the Warning Threshold then the Warning Threshold will be set equal to the Normal Alarm Threshold and this value stored in memory If the Normal Alarm Threshold is then increased again the Warning Threshold will not be changed and will remain at the lower level This is required as the alarm potentiometer could be adjusted after programming the Warning Threshold or the Normal Alarm Level reprogrammed by Modbus If Register 403 Warning Threshold Enabled is cleared set to zero then the Warning Threshold will also be set to zero and this value stored Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL
13. the alarm This is a non quantified test Bump Test Using Gas Cylinders Remove the enclosure lid of the gas detector not in an Ex area Connect voltmeter to monitor sensor response monitor 0 10V Jumper J8 on response on CON 2 between pins OV amp V Expose the sensor to gas from the cylinder You may add some blu tack or similar material to allow the hood to adhere to the PCB You can place the entire unit into a plastic bag or use a plastic hose hood to direct gas to the sensor head A response of above 80 is acceptable Calibration KIT Codice Code DPWLKO0000 Flow regulator typical flow 0 3L Min Flexible non absorbant tubing Vented Calibration Hood f Cylinder __ Fig 3 a Note gas cylinder and flow regulation are not supplied 3 3 Calibration This consists of exposing the sensor to a calibration gas setting the zero or Standby voltage the span range and checking adjusting all the outputs to ensure that they are activated at the specified gas concentration The infrared versions R134a R404a R407a R410a used a specific element sensor that does not need any calibration This is the adjustment of the gas detector s accuracy or recalibrating after sensor element exchange using calibration gas Carel offers a calibration kit hood with non absorbant plastic tubing to be used with a Calibration gas cylinder a flow regulation valve not supplied with flexible non absorbant tubi
14. 00 DPWLB27000 DPWLC27000 DPWLD27000 DPWLE27000 HCFC HFC and ETHYLENE DPWL417000 DPWL427000 Calibration Cup Assy HCFC SC Type Cup Inner Diameter 23 4mm Tubing Inner Diameter 5mm Usage IP41 units with TGS832F sensor CAREL code DPWLA07000 DPWLB07000 DPWLC07000 DPWLDO7000 DPWLEO7000 DPWLQ07000 DPWLRO7000 Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 6133017AXX HCFC HFC and ETHYLENE refrigerant gas sensor for semiconductor version cable 5m 6133018AXX CO2 refrigerant gas sensor for infrared version cable 5 m 6133016AXX CO2 refrigerant gas sensor for infrared version Calibration Cup Assy Combustible SC Type Cup Inner Diameter 16 6mm Tubing Inner Diameter 5mm Usage IP41 units with TGS813 sensor CAREL code DPWLG07000 18 6133019AXX PWLKITOTO NH3 refrigerant gas sensor for semiconductor version Calibration adapter hose and 4 hoods Calibration Cup Assy IR RS Cup Inner Diameter 42 8mm Tubing Inner Diameter Smm Note The cup has four equal cuts to allow it to fit over the IR RS sensor as shown below Usage IP41 units with IR RS sensor CAREL code DPWLJO7000 DPWLKO7000 DPWLLO7000 DPWLMO7000 DPWLNO7000 CAREL DPWLKIT200 Red electronic audible and visual alarm 12 24 Vac dc IP65 The Carel audible and visual alarm device is useful for signalling local or remote alarms that need continuous monitoring
15. TP LD 2 GREEN LD 2 RED ZERO SW1 swa P2 lo P4 TP2 4 20mA Vs O 2 SPAN J7 J8 J9 J10 3 CN4 oV 5 10 5 10 AC 0012 5 JI GND VOLTS CN1 mobBus TX TR 5 00 906 CN2 CN3 6 OV V 666 006 GNX V I N O COMN C I ADMI 31 32 25 26 ea F Kamin GND G GO RELAY fa i l 24Vac transformer 230Vac line Fig 2 m Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 14 CAREL pCO5 PVPRO PWPRO RS485 Modbus connection Sensor Controller ala ene Ti 7 gode o Ea VI 229 299 ii x GND TYR GND Tx GND pLA 25 BMS2 J26 FBus SENSOR na Alarm u TP1 LD 2 LD 2 GREEN RED Supervisor E el e a pe e SW2 ZERO E eS SM 42 TP2 OISPAN Vs P3 4 20mA J7 J8 J9 J10 31 10 Gnd CN1 mopgus TX TR up to 247 devices Not connec N the transformer to ground 230Vac line imput 24W 50 60 Hz 28 36 V max power 45 VA 20 W gt seriale RS485 Modbus G GO 24Vac transformer E NB connect just one Master device to sensor network 230Vac line Fig 2 n Stand alone operation Sensor A O wi SENSOR Aa o O TP1 LD 2 RED LD 2 GREEN ZERO i PI
16. assed the annual test Detector Address 106 The detector address is the value of address set by the hexadecimal switches Software Version 107 The software version is the revision of firmware operating on the processor of the detector Detector Code 108 The detector code is a proprietary machine number for identifying the classification of detector Order Number 109 The order number is a proprietary number associated to the detector to distinguish the concentration range and gas type New Tested sensor Sensor Timer Register 105 TestFlag Register 401 0 0 Timer 1 every hour Timer gt 8760 hours Write 0 to Register 401 to Clear Test Flag 0 Fig 5 e Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 22 CAREL Analogue Output Holding Registers read Function Code 03 Output Holding Registers are readable write Function Code 06 8 writable Register Description Range Details 200 Alarm Set Point ppm 0 65 535 Alarm set point threshold in parts per million 201 Alarm Delay 0 59 The Alarm Delay is the time in minutes after the gas concen tration exceeds the alarm level and the Alarm Flag Register 300 is set to 1 202 Sounder Delay 0 59 The Sounder Delay is the time in minutes the sounder is deactivated for during the alarm phase when the gas concentration exceeds the alarm set point from revision 2 025 203 Warning Thresh
17. ay Connector N O mm COM n N C mm CAREL Infrared sensor CO2 version Infrared IR RS Sensor PC board Addressing GREEN 6 a Se LED A A SW1 TP2 Vs e TP3 OV e CN1 a al set OV V 12 24 Vdc min OG Output uu Fig 2 J4 Reset Jumper J4 On Halts unit operation JA Off Factory default Normal operation J5 and J6 Delay Jumper for Audible Alarm and Relay These jumpers determine the delay time between the unit detecting a gas concentration above the alarm set point and the activation of the Relay and Sounder J5 Off J6 Off No delay on sounder or alarm relay activation Factory Default J5 On J6 Off 1 minute delay on sounder and alarm relay activation J1 and J2 Power Supply Selection Jumper AC Power DC Power Selected Selected Normall N O gt Open ON OFF JM JUL COM Common OFF ill ON i J2 J2 N C Ea CN1 CN1 12 24 Vac OV V 12 24 Vdc CN3 CAREL Infrared R134a R404a R407a R410a version Infrared IR RS Sensor PC board TP1 Alarm Addressing 6 SWI GREEN LED TP2 Vs e 4 El Volts i J7 J8 J9 J10 TP3 OV e AC Select J1 DO CN1 Modbus Jean n suz 12 24 Vdc E an a a a Output en 9 B J3 M J2 Fig 2 k J5 Off J6 On 5 minute delay on sounder and alarm relay activation J5 On J6 On 10 minute delay on sounder and alarm relay activation If the unit is conn
18. e controller Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 2 12 Electrical connections and configuration Semiconductor sensor R22 R134a R404a R407a R407c R410a version lo Delay Alarm DO TP DE Audible Alarm and Relay Set Point PC board Voltage Test Point GREEN RED 6 LED Vi LED SWI de Sensor TP2 4 20mA Voltage Vs Test Point e P3 Ground Plane TP3 SPAN CN4 RIRIRIB Test Point 0 0 1 2 u 000 14 44 AC Select Ji e EE i 5 10 CN1 Modbus Volts 2 lg nio NER en OG j a a a Output Tae 9 Semiconductor SC Sensor Fig 2 Table of Jumper functions J1 and J2 Power Supply Selection Jumper J1 On J2 Off Unit is set for AC power supply Factory default J1 Off J2 On Unit is set for DC power supply J3 Audible Alarm Jumper J3 On Sounder enabled Audible alarm if setpoint reached Factory Default J3 Off Sounder disabled No alarms audible If the unit is connected to a control system the sounder may also be disabled by using the software However removing J3 will always disable the sounder SW1 and SW2 Modbus Addressing J4 Reset Jumper J3 Audible Alarm Jumper ON ADDR SWI SW2 OFE Then DEC LSB MSB OFF Reserved Je ce H D00 0 0 Address DO1 1 0 Normal Reset D02 0 1 Operation 9 Valid D17 1 1 Addresses A 7 7 E a f Reserved 255 F Addresses d y Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CN3 Rel
19. e to set the delay at 0 min then the normalisation period is about 5 min this is indicated by the green LED flashing and then you can begin the testing or calibration If detectors have been in long term storage or the detectors have been turned off for a long time normalisation would be much slower However within 1 2 hours the detector should have dropped below the alarm setting and be operational You can monitor normalisation progress exactly by monitoring the sensor output on CON 2 between pins OV amp V Bump Test every year Ideally bump tests are conducted on site in a clean air atmosphere Prior to carrying out a bump test check and adjust the zero setting as described in the Calibration section Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 16 Semiconductor Cylinders of gas at known concentrations are available for quantified tests This consists of exposing the sensor to the gas and checking that alarm lights and relays are activated If this is not available for a non quantified test you can use a gas cigarette lighter By cracking open the valve without igniting the gas you release the gas onto the sensor and force it into alarm Check that alarm light sounder and relay are activated Infrared sensor for CO2 We offer cylinders of calibration gas at known concentrations These are a quantified test If these are not available then you can breathe on the sensor Human breath has enough CO2 to trigger
20. e vicinity Each model is calibrated for a specific gas and is typically installed in new or existing buildings that require continuous monitoring of gas leaks Installation of the device ensures compliance with European standards F GAS and EN378 as well as ASHRAE 15 Available in semiconductor or infrared version with enclosure IP41 and IP66 built in and with remote sensor 1 2 Codes The Gas Detector is available in two sensor versions Semiconductor SC for refrigerants and infrared IR for CO2 e con sensore remoto e cavo 5m Semiconductor Semiconductor with 5 m Descrizione IP41 remote sensor IP66 DPWLA07000 DPWLA27000 R22 gas leak detector DPWLB07000 DPWLB27000 R134a gas leak detector DPWLC07000 DPWLC27000 R404a gas leak detector DPWLRO7000 R407a gas leak detector DPWLDO7000 DPWLD27000 R407c gas leak detector DPWLE07000 DPWLE27000 R410a gas leak detector DPWLG07000 NH3 gas leak detector DPWLQ07000 ETHYLENE gas leak detector Infrared IP41 Infrared IP66 Infrared with 5m Descrizione remote sensor IP66 DPWLK07000 R134a gas leak detector DPWLLO7000 R404a gas leak detector DPWLMO7000 R407a gas leak detector DPWLNO7000 R410a gas leak detector DPWL417000 DPWL427000 CO2 gas leak detector Options 6133015AXX HCFC HFC and ETHYLENE refrigerant gas sensor for semiconductor version 6133017AXX HCFC HFC and ETHYLENE refrigerant gas sensor for semicond
21. ected to a control system the delays may be set by software up to 60 minutes If there is a Jumper on J5 or J6 or both J5 and J6 have jumpers the software value is cleared following a restart whereby the power to the detector is turned off and then turned on again Following this restart the delay period is determined by the hardware so that the Jumpers J5 and J6 set the delay period If there are no jumpers on both J5 and J6 the delay period set by the software is memorised and retained following a power cycle power off power on P1 P4 Adjustment Pots J5 and J6 Delay Jumper for Audible Alarm and Relay Adjusts Alarm Setpoint J5 H 0 Minutes P1 for Audible Alarm No Delay and Relay J6 H J5 M J6 JI J5 4 Adjusts Zero Level Voltage for Output Signal I N Mi P3 Adjusts Output Signal Span ra Jo W y Adjusts 4 20 mA J5 a 10 Minutes P4 Current Output Delay never be adjusted by the user Be ee ES Jo W 1 1 Minutes Delay Po 5 13 Enclosure Access To open the standard sensor IP41 housing turn the cable clamp 1 2 turn counter clockwise to loosen the internal nut depress the clip on top of the enclosure and open Reverse to close For IP66 use the 4 hex bolts on the cover J7 J10 Output Jumper or CN2 Output Signal Connector This determines which voltage output range is selected Only one voltage output may be selected at any time so only one jumper may be on The lowest value in the range corre
22. egister 104 can only be read its value can be modified by writing to register 200 The Alarm Set Point is measured as a percentage of the full scale so for example 1 0 Volts on TP with respect to TP3 corresponds to a 20 Alarm Set Point given that the maximum voltage is 5 0 Volts The Alarm Set Point register 104 will contain 20 to represent 20 and this corresponds to a 200 ppm alarm threshold Note from revision 2 025 lt Relay operation is dependent on the value of the Failsafe Relay Enabled flag register 402 21 Monitor Gas concentration DEACTIVATE Red LED Relay Sounder and Concentration gt Set point Alarm Flag 0 Turn on Red LED Alarm Indicator Set Alarm Flag register 300 1 Any delay YES Read software Alarm Delay register 201 NO DELAY Any delay Register 201 0 y Read hardware Delay Jumpers J5 and J6 Y Wait for delay to expire Activate red led Relay Sounder Alarm flag Fig 5 d Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 Sensor Timer Register 105 The sensor timer register keeps a count of the number of hours the sensor is on The register is incremented every hour and after one year the register will exceed 8760 hours and the Test Flag will be set to 1 to indicate that the detector requires testing The Test Flag Register is located at address 401 and can be cleared to indicate that the sensor and detector have p
23. en test points TP3 negative and TP1 positive on the voltmeter Adjust Alarm Pot P1 until the desired alarm test point voltage is displayed by the voltmeter Itis also possible to set the setpoint byserial comunication line CN4 Modbus Connector J7 J10 Output Jumper or CN2 Output Signal Connector maa G Ground Isolated from OV Ge F Non inverting Modbus Signal TxD RxD ja A Modbus Non inverting Modbus Signal TxD RxD GNX 0 Volt Ground J7 J8 Jo J10 maa 0 5 V Output po 0 10 V Output GNXV I V ESVO i FEE upt de E W Output 2 10VOutput E FF 1 Signal Current Output 4 20 mA Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL Esempio schemi di collegamento pRack pCO3 4 to 20 mA analogue input connection Sensor JFR osv SENSOR Mar Alarm TP1 LD 2 LD 2 GREEN RED ra o e le e e e 88 eg PE pe ZERO SW1 swa P2 lo P4 Controller 1P2 4 20mA FS SPAN a P3 E E al AC MES J Gnd CN1 mobsus TX TR 5 00 006 CN2 CN3 6 OV V a GNX V I N O COM N C input 24W 50 to 60 Hz max power 40 VA 15W fi e d ca rd G GO G GO Noe 24Vac transformer 24Vac transformer the transformer to ground 230Vac line 230Vac line Fig 2 1 ir33 universal 4 to 20 mA analogue input connection Controller Sensor EE IS er er ED Gir3Zon BEE Over Po SENSOR Alan o
24. est Function instructions The Carel Gas Detector is calibrated in the factory and does not require to be calibrated on installation After installation the units should be bump tested Expose the sensors to test gas using a cigarette lighter only for Semiconductor units without igniting it and hold it over the vent holes on the upper right side of the Carel Gas Detector The gas is heavier than airand should fall into the Carel Gas Detector This will put the system into alarm The red LED will light showing the system is in alarm The delay will prevent the siren sounding or relay switching for the preset delay if delay is set In the case of CO2 breathing on the sensor will generate a response as your breath is mostly CO2 Per gas R22 R134a R404a R407a R407c R410A h max 300 mm Note to be installed close the cooler unit Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 Per gas C02 h max 1500 mm CAREL With a bump test you can see the functions of the sensor the red led will light the relay and sounder will function the output selected say 0 10V will show the gas level To test the siren and or relay function check the delay is set at zero using the header as shown on the installation diagram and expose to gas as above You can mute the siren by removing the jumper J3 After the gas has cleared the red led siren and relay will automatically reset Before testing the sensors on site the Carel
25. he testing or calibration of this unit This manual is only intended as a guide and insofar as permitted by law the manufacturer accepts no responsibility for the calibration testing or operation of this unit The frequency and nature of testing or calibration may be determined by local regulation or standards EN378 and the F GAS Regulation require an annual check in accordance with the manufacturer s recommendation There are two concepts that need to be differentiated 1 bump test 2 calibration 3 2 Bump Test This consists of exposing the sensor to a gas and observing its response to the gas The objective is to establish if the sensor is reacting to the gas and all the sensor outputs are working correctly There are two types of bump test e Quantified where a known concentration of gas is used or e Non Quantified where a gas of unknown concentration is used A Before you carry out the test or calibration 1 Advise occupants plant operators and supervisors 2 Check if the detector is connected to external systems such as sprinkler systems plant shut down external sirens and beacons ventilation etc and disconnect as instructed by the customer 3 Deactivate alarm delays if selected at JP5 JP6 as per instructions in previous paragraph 4 For Bump Test or Calibration the detector should be powered up overnight If the unit has been installed and running for about 24 hrs and you need to power it off for a short tim
26. lement Sensors mnmmmmmmeenesssrsseersserseeesserssesssesssesssessesesees 18 42 Calibration Cup Datasheet n nmeeseseeemmeeervssssssevrseee 18 5 MODBUS RTU PROTOCOL 20 5 1 Modbus RTU Remote Terminal Unit Protocol 20 EE lla 20 gt Ribelle 20 Alia 23 Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL 1 INTRODUCTION 1 1 Description DPWL represent a range of electronic fixed gas leak detectors with LED indicators for Power and Alarm They have direct output relays as well as voltage and current outputs and Modbus communication They are designed for detection of refrigerant leaks to the atmosphere in Coldrooms Freezer rooms Plantrooms plant enclosures and other areas where refrigeration plant is likely to be located The refrigerant gas leak sensor is a device that signals leakages of common gases R22 R134a R404a R407a R407c R410a NH3 Ethylene and CO2 It can be used in stand alone applications or integrated into Carel controllers or third party devices Connection to Carel controllers is made using an analogue or digital output or Modbus RS485 serial connection When leaks are detected exceeding a certain concentration the sensor sends an alarm signal to the controller activating a local audible and visual warning and a relay SPDT This allows prompt identification of gas leaks avoiding having to shut the unit down and at the same time guaranteeing the safety of any people in th
27. lt lt On power up De energise relay NO Output is open lt On sensor fault Energise relay NO Output is closed lt If Warning Activates Relay Register 404 1 and the gas level exceeds the Warning Threshold Register 203 Energise relay NO Output is closed Mete Ral lt If Warning Activates Relay Register 404 0 and the gas level exceeds the Warning Threshold Register 203 De energise relay NO Output is open e If the gas level exceeds the Normal Alarm Threshold Register 200 Energise relay NO Output is closed Warning Activates Relay Register 404 1 Fig 5 h niput status Fags neon Cone 0a If Failsafe Relay Operation is enabled Register 402 1 Failsafe Status Flags are read only lt On power up Register Description Range Details Energise relay NO Output is closed 300 Alarm Flag 0 1 1 Gas concentration is greater or equal to alarm e On sensor fault set point Da De energise relay NO Output is open i AN o die If Warning Activates Relay Register 404 1 and the gas level exceeds a he Warning Threshold Register 203 30 Relay 0 1 1 Relay is energised sau a e 0 Relay is de energised De energise relay NO Output is open 302 Sensor Fault 0 1 1 Sensor absence or open circuit sensor fault is e If Warning Activates Relay Register 404 0 and the gas level exceeds detected the Warning Threshold Register 203 0 Sensor present in circuit and no open circuit Energise relay
28. n the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately 5 in the event of illegal disposal of electrical and electronic waste the penalties are specified by local waste disposal legislation Warranty on the materials 2 years from the date of production excluding consumables Approval the quality and safety of CAREL INDUSTRIES Has products are guaranteed by the ISO 9001 certified design and production system Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL Content 1 INTRODUCTION 7 II Ei 7 o A ME E OE OE A a ada 7 1 3 Calibration F RT TN Sasa 7 js eden 7 1 5 Technical specification S sasies 7 1 6 Dimensions and Mountain iti 3 2 INTRODUCTION 9 Zi Display APS 9 22 Modbus CONE CUI OI NG aida 9 2 3 Setting the communications Baud Rat6 oceoooccc mm 9 ZA 16 TONO SENSE mir 9 25 MANS TOOTS rai dato 9 EE 6 6 150 0 EE isan aha andadeken 9 27 GE SEN 9 28 Air Conditioning Direct systems VRF VRV mms 10 DE es Ge Sion 10 210 Trouble SEDOT RE nn 10 2 11 Electrical connection diagram examples kl 2 12 Electrical connections and configuration 12 3 CHECK AND CALIBRATION PROCEDURE 16 General WNO eee 16 ET cicca 16 i ii 16 34 Additional recommendations e0sessesseeae sen ese eea ewa an anna en nawan wn nana 17 4 ACCESSORIES 18 4 1 E
29. ng and vented calibration hood Tools required 1 Gas can with the appropriate gas and concentration 2 Avoltmeter crocodile clips recommended 3 Estimate 30 min per sensor The unit has two element sensor PCB versions SC and IR Calibration and alarm relay set point is done on a 0 5V scale CAREL Adjusting the alarm relay This process is the same for all versions See fig 2 g and 2 h for location of pot P1 and test points OV TP3 and Alarm TP1 The first step to setting the alarm relay at the desired levels e Pot P1 is used to adjust the set point at which the relay activates Monitor the output between test points OV negative and Alarm positive See example below Example For a range of 0 1000ppm relay amp 100ppm Relay 100ppmx 5 sothat Alarm relay 0 5 Volts 1000 while the 0 5V output sensor signal corresponds to 0 1000 ppm range Element sensor PCB adjusting the detection range 1 Semiconductor Sensor SC for refrigerants There are two adjustments required the zero and the span They are monitored at OV and VS on a 0 5V scale If the target range is 0 1000ppm and the gas used is 1000 ppm then 5V 1000ppm Pot P2 is used to adjust the zero of the range span Monitor the output between OV negative and VS positive and adjust the Pot to OV or slightly positive 0 01 V is acceptable Pot P3 is used to calibrate the range span of the sensor Monitor the output between OV negative and VS posi
30. o use the product even if CAREL or its subYESdiaries are warned of the posYESbility of such damage IMPORTANT A NO POWER g amp SIGNAL NG mi CABLES V TOGETHER READ CAREFULLY IN THE TEXT WARNING separate as much as possible the probe and digital input signal cables from the cables carrying inductive loads and power cables to avoid possible electromagnetic disturbance Never run power cables including the electrical panel wiring and signal cables in the same conduits L CD Er The product must be installed with the earthconnected using the special yellow green terminal on the terminal block Do not use the neutral for the earth connection DISPOSAL INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT WEEE In reference to European Community directive 2002 96 EC issued on 27 January 2003 and the related national legislation please note that 1 WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of separately 2 the public or private waste collection systems defined by local legislation must be used In addition the equipment can be returned to the distributor at the end of its working life when buying new equipment 3 the equipment may contain hazardous substances the improper use or incorrect disposal of such may have negative effects on human health and on the environment 4 the symbol crossed out wheeled bin shown o
31. odes specify the action to be performed on the data in the registers of the gas detector Function Code Action Registers 01 Read Output Digital Status flags 400 read writable 02 Read Input Digital Status flags 300 read only 03 Read Output Analogue Holding Registers 200 read writable 04 Read Input Analogue Input Registers 100 read only 05 Write to Output Digital Status flags 400 writable 06 Write to Output Analogue Holding Registers 200 writable Tab 5 d 5 3 Register Map The Register Map specifies the details of storage locations registers and flags within the detectors Analogue Input Registers Function Code 04 Input Registers are read only Register Description Range Unit 100 Concentration gas level of full scale 0 100 101 Concentration gas level in ppm 0 65 535 ppm 103 Full scale sensor level in ppm 0 65 535 ppm 104 Alarm set point of Full Scale 0 100 105 Sensor timer 0 65 535 hours 106 Detector address 1 247 107 Software version 10 108 Detector Code 270 from revision 2 025 109 Order Number 300 Tab 5 e Concentration Registers 100 101 The real time gas concentration is available in different formats register 100 keeps track of the percentage concentration for example a value of 33 represents 33 of the maximum detectable gas concentration Register 101 maintains the
32. old 0 65 535 Warning Threshold alarm level in parts per million Tab 5 f Alarm Set Point in ppm Register 200 The Alarm Set Point register 200 stores the software setting for the alarm set point in parts per million ppm Writing the value zero into this register will enable the hardware potentiometer P1 to determine the Alarm Set Point If a value greater than zero and less then the full scale sensor limit in ppm is written into register 200 then the hardware potentiometer setting is ignored and effectively overrides the hardware alarm set point Note from revision 2 025 Relay operation is dependent on the value of the Failsafe Relay Enabled flag register 402 Monitor Gas concentration Read software Alarm Limit register 200 NO Alarm Limit Register 200 0 Read hardware Alarm Potentiometer P1 Concentration gt Set Point CAREL Alarm Delay Register 201 The Alarm Delay Register 201 stores the software alarm delay period up to 59 minutes and the jumpers J5 and J6 set the hardware alarm delay period The alarm delay is the duration between the unit detecting a gas concentration above the alarm set point and the activation of the red LED alarm indicator the relay the sounder and setting the Alarm Flag register 300 with the value 1 If there is a jumper on J5 or J6 or both J5 and J6 have jumpers on and connecting the pins the software value is cleared following a restart whereby the powe
33. or by removing jumper J4 or by cycling the power on and off Address 254 SW1 E SW2 F Baud rate 9600 Factory Default Address 255 SW1 F SW2 F Baud rate 19200 After the unit has been powered up the desired Modbus address 1 247 can be selected For more information see paragraph 4 2 2 4 Location of Sensors Sensors must be located within the appropriate wire lengths from the central control unit if used In all cases the sensor supplied is designed for maximum sensitivity to a particular gas However in certain circumstances false alarms may be caused by the occasional presence of sufficiently high concentrations of other gaseous impurities Examples of situations where such abnormalities may arise include e Plant room maintenance activity involving solvent or paint fumes or refrigerant leaks lt Plant rooms in fruit ripening storage facilities because of accidental gas migration bananas ethylene apples carbon dioxide lt Heavy localised exhaust fumes carbon monoxide dioxide propane from engine driven forklifts in confined spaces or close to sensors A response delay may be selected to minimise any problems that might arise or change the alarm set point 2 5 Machinery rooms There is NO ABSOLUTE RULE in determining the number of sensors and their location However a number of simple guidelines will help to make a decision Sensors monitor a point as opposed to an area If the gas leak does not reach the
34. r can be downloaded even prior to purchase from the webYESte www CAREL com Each CAREL product in relation to its advanced level of technology requires setup configuration programming commisYESoning to be able to operate in the best possible way for the specific application The failure to complete such operations which are required indicated in the user manual may cause the final product to malfunction CAREL accepts no liability in such cases Only qualified personnel may install or carry out technical service on the product The customer must only use the product in the manner described in the documentation relating to the product In addition to observing any further warnings described in this manual the following warnings must be heeded for all CAREL products Prevent the electronic circuits from getting wet Rain humidity and all types of liquids or condensate contain corroYESve minerals that may damage the electronic circuits In any case the product should be used or stored in environments that comply with the temperature and humidity limits specihed in the manual Do not install the device in particularly hot environments Too high temperatures may reduce the life of electronic devices damage them and deform or melt the plastic parts In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual Do not attempt to open the device in any way o
35. r to the detector is turned off and then turned on again Following this restart the delay period is determined by the hardware so that the Jumpers J5 and J6 set the delay period If there are no jumpers on both J5 and J6 the delay period written into the alarm delay register 201 is used as the delay and is memorised and reused after a power cycle when the power is turned OFF and back ON Note from revision 2 025 Relay operation is dependent on the value of the Failsafe Relay Enabled flag register 402 DEACTIVATE Red LED Relay Alarm Flag and Sounder Flag 0 Monitor Gas concentration Concentration gt Set point ALARM PHASE Concentration gt Alarm Set Point Red Led Relay amp Sounder ON Alarm Sounder amp Relay FLAG SET 1 NO Sounder Flag 1 Sounder Active Clear Sounder Flag 0 write 0 to register 400 DEACTIVATE Sounder Sounder Flag register 400 0 NO Wait for the delay to expire Sounder Delay Period expired YES REACTIVATE Sounder Sounder Flag register 400 1 Fig 5 9 23 Ah important If variables HR200 and HR201 are changed make sure the new value assigned is within the operating range If these variables are set with values outside of the range the values will be set to 0 and the device will read the hardware setting if available trimmer P1 and jumpers J5 and J6 When switching off and on again the variables will automatically return to the las
36. sensor then no alarm will be raised Therefore it is extremely important to carefully select the sensor location Also consider ease of access for maintenance The size and nature of the site will help to decide which method is the most appropriate to use Locations requiring the most protection in a machinery or plant room would be around compressors pressurised storage vessels refrigerant cylinders or storage rooms or pipelines Most vulnerable are valves gauges flanges joints brazed or mechanical filling or draining connections etc When mechanical or natural ventilation is present mount a sensor in the airflow In machinery rooms where there is no discernable or strong airflow then options are e Point Detection where sensors are located as near as possible to the most likely sources of leakage such as the compressor expansion valves mechanical joints or cable duct trenches e Perimeter Detection where sensors completely surround the area or equipment e With heavier than air gases such as halocarbon and hydrocarbon refrigerants such as R404A propane and butane sensors should be located near ground level e With similar density or miscible gases such as CO2 sensors should be mounted about head high say 1 5m e Sensors should be positioned a little way back from any high pressure parts to allow gas clouds to form Otherwise any leakage of gas is likely to pass by in a high speed jet and not be detected by the sensor
37. sponds with zero level of gas the highest value in the range selected corresponds with the gas detector range 1000ppm for refrigerants 10 000ppm for CO2 J7 On 0 5V output enabled Factory Default J8 On 0 10V output enabled J9 On 1 5V output enabled J10 On 2 10V output enabled Adjusting the alarm setpoint This process is the same for all versions See fig 2 9 2 h for location of Alarm Potentiometer P1 and test points OV TP3 and Alarm Test Point TP1 This process requires a volt meter connecting the negative DC lead to TP3 and the positive DC Lead to TP1 The first step is to determine the required setting for activation of alarm relay and sounder Factory Defaults are lt 100ppm for Refrigerants R22 R134a R407A R407C R410A semicond lt 200ppm for refrigerant NH3 Ethylene semiconductor lt 100ppm for Refrigerants R134a R40A R407C R410A Infrared lt 1500ppm for Carbon Dioxide CO2 infrared Then calculate the alarm relay voltage at the desired levels The maximum voltage is 5V so this corresponds with the detectors full scale range as shown on the rating label Determine the alarm voltage by dividing the setpoint level by the full range scale and multiplying by the voltage 5V Example for a full scale range of 0 1000ppm and relay required at 200ppm Alarm test Point Voltage 200ppm 1000ppm x 5V 1 0 Volts Alarm Pot P1 is used to adjust the set point at which the relay activates Monitor the output betwe
38. t valid value set via Modbus When used together with Carel supervisors PWPRO and PVPRO this situation does not occur Sounder Delay Register 202 The Sounder Delay is the time in minutes the sounder is deactivated for during the alarm phase when the gas concentration exceeds the alarm set point The alarm condition will activate the red LED alarm indicator the relay the sounder and the associated flags will be set to the value 1 The alarm flag in register 300 the relay flag in register 301 and the sounder flag in register 400 are set with the value 1 to indicate the active alarm state Clearing the Sounder Flag by writing the value zero into register 400 will deactivate the sounder for the period defined by the sounder delay register 202 The sounder delay is in minutes and the maximum value is 59 so for example if the value in register 202 is 25 then the sounder will be disabled for 25 minutes during an alarm condition After this 25 minute mute period the sounder will be reactivated if the detector is still detecting gas concentrations in excess of the alarm set point otherwise the sounder will not be reactivated if the gas concentration has gone below the alarm set point Note from revision 2 025 Relay operation is dependent on the value of the Failsafe Relay Enabled flag register 402 Warning Threshold in ppm Register 203 The Warning Threshold register 203 stores the software setting for the Warning Alarm set point in parts
39. ther than described in the manual Do not drop hit or shake the device as the internal circuits and mechanisms may be irreparably damaged Do not use corroYESve chemicals solvents or aggressive detergents to clean the device Do not use the product for applications other than those specified in the technical manual All of the above suggestions likewise apply to the controllers serial boards programming keys or any other accessory in the CAREL product portfolio CAREL adopts a policy of continual development Consequently CAREL reserves the right to make changes and improvements to any product described in this document without prior warning The technical specifications shown in the manual may be changed without prior warning The liability of CAREL in relation to its products is specified in the CAREL general contract conditions available on the webYESte www CAREL com and or by specific agreements with customers specifically to the extent where allowed by applicable legislation in no case will CAREL its employees or subYESdiaries be liable for any lost earnings or sales losses of data and information costs of replacement goods or services damage to things or people downtime or any direct indirect incidental actual punitive exemplary special or consequential damage of any kind whatsoever whether contractual extra contractual or due to negligence or any other liabilities deriving from the installation use or imposYESbility t
40. ting slots 9mm long x6mm wide 417 7 use 5mm 6mm screws y 146 mm x 122 mm mounting l 85 mm measurements I E E m N E mounting slots 9mm long x 6mm wide lt o in use 5mm 6mm screws Y CAREL 2 INTRODUCTION 2 1 Display functions On powering up it will sense for the presence of gas after an initial warm up delay of 5 minutes In alarm condition the green LED stays on e the red LED will be on the siren operates if it has not been disabled and after a delay if this option has been selected e the relay output activates after a delay if this option has been selected e the voltage or current output changes proportional to gas concentration Fault condition the green LED will be go off e the red LED will be on the siren does not operates e the relay does not activates lt a voltage or current fault output will activate e 2mA on the 4 20mA output e 0 5Von the 1 5V output e 1Vonthe 2 10V output 2 2 Modbus connections Connector CN4 is the RS 485 communications port providing access to the Modbus RTU protocol for communicating with the Carel DPWL gas detectors A is the non inverting data signal B is the inverted data signal and OV is the board ground plane See Cap 3 2 3 Setting the communications Baud Rate To choose a communications baud rate select either address 254 or 255 and reset the gas detect
41. tion Code 06 Register Description Range Details 200 Alarm Set Point ppm 0 65 535 Alarm set point threshold in parts per million 201 Alarm Delay 0 59 The Alarm Delay is the time in mi nutes after the gas concentration exceeds the alarm level and the Alarm Flag Register 300 is set to 1 202 Sounder Delay 0 59 The Sounder Delay is the time in minutes the sounder is deactiva ted for during the alarm phase when the gas concentration exceeds the alarm set point 203 Warning Threshold 0 65 535 Warning threshold alarm level in ppm parts per million Tab 5 Input Status Flags read only Function Code 02 Register Description Range Details 300 Alarm Flag 0 1 1 Gas concentration is greater or equal to alarm set point 0 Gas concentration is less than the alarm set point 301 Relay 0 1 1 Relay is energised 0 Relay is de energised 302 Sensor Fault 0 1 1 Sensor absence or open circuit sensor fault is detected 0 Sensor present in circuit and no open circuit fault detected 303 Red LED 0 1 1 Red LED is on Alarm Indication or Fault Indication if green LED is off 0 Red LED is off No alarm or fault condi tion exists 304 Green LED 0 1 1 Green LED is on Power indicator detec tor powered on 0 Green LED is off No power or fault condition if the red LED is on 305 Reserved Reserved for future use 306 Reserved Reserved for fu
42. tive Expose the sensor to calibration gas and allow to stabilise and adjust pot P3 to 5V 2 Infrared CO Pot P2 is used to adjust the zero of the range span Monitor the output between OV negative and VS positive and expose the sensor to Nitrogen or zero air and once stable adjust the Pot to OV or slightly positive 0 01 V is acceptable Pot P3 is used to calibrate the range span of the sensor Monitor the output between OV negative and VS positive Expose the sensor to calibration gas and allow to stabilise and adjust pot P3 to 5V NOTE Sensors outputs are linear thus as long as you have a gas canister of known concentration you can calibrate to any desired range Example For a range of 0 1000ppm and a canister of the target gas at 800ppm The 0 5V signal corresponds to 0 1000 thus if using the above canister Voltage 800 ppm x _5__ 4V and so the output voltage signal should 1000 be adjusted to AV Fig 3 b 17 Fig 3 C 3 4 Additional recommendations False alarms If false alarms are being triggered by background gases paint fumes etc extreme humidity or temperature conditions you will find that the zero has moved to a value you can adjust the zero setting back to zero to compensate You may also increase the response time delay to help eliminate false alarms Normalisation Period below we show typical time to normalize for various sensor types The units are powered up and the ou
43. tput voltage monitored on the 0 10V output The approximate time to drop to near OV is shown Sensor Type Stabilised OV Semi Conductor 1 3 Minute Infrared 2 Minutes Semiconductors output over the max scale i e gt 5V Both move towards zero as they stabilise Infra red output will be approximately zero volt for 60 to 120 seconds and after stabalisation will read room content of CO2 If sensors have been in long term storage or the detectors have been turned off for a long period normalisation would be much slower However within 1 2 hours sensors should have dropped below the alarm level and be operational You can monitor progress exactly by monitoring the 0 10V output when the output settles around zero the sensor is normalised In exceptional circumstances the process can take up to 24 hours or more to get to OV again monitor the 0 10V output and you can see what is happening Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL 4 ACCESSORIES 4 1 Element sensors 6133015AXX refrigerant gas sensor for semiconductor version NN 1 _ 75mm 50mm DPWLKIT100 Water spray protection for IP66 version On the IP66 version the sensor can be protected by screwing a cap onto the sensor 4 2 Calibration Cup Datasheet Calibration Cup Assy IP66 Cup Inner Diameter 42 8 mm Tubing Inner Diameter 5 mm Usage all IP66 and IP66 Remote Heads CAREL code DPWLA270
44. ture use 307 Warning 0 1 This is only operational if Register 403 is Threshold set to 1 Exceeded Tab 5 k Output Status Flags readable amp writable read Function Code 01 write Function Code 05 Register Description Range Details 400 Sounder Flag 10 1 1 Sounder is on 0 Sounder is off 401 Test Flag 0 1 1 Sensor on operating for more than 1 year and requires testing 0 Sensor does not require testing yet 402 Failsafe Relay 0 1 1 Failsafe relay operation see table for Enabled relay logic 0 Standard relay operation default 403 Warning 031 1 Warning threshold operation is enabled Enabled 0 Warning threshold operation is disabled default 404 Warning 0 1 1 Gas concentrations in excess ofthe Activates Relay Warning Threshold Register 203 will activate the relay Tab 5 1 25 Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 CAREL Note Gas Leakage Detector 0300035EN rel 1 3 06 12 2013 26 CAREL CAREL INDUSTRIES HQs Via dell Industria 11 35020 Brugine Padova Italy Tel 39 0499 716611 Fax 39 0499 716600 carel carel com www carel com Agency Gas Leakage Detector 0300035EN rel 1 3 06 12 2013
45. uctor version cable 5m 6133019AXX NH3 refrigerant gas sensor for semiconductor version 6133016AXX CO2 refrigerant gas sensor for infrared version 6133018AXX CO2 refrigerant gas sensor for infrared version cable 5m DPWLKITOOO Calibration adapter hose and hood DPWLKITO10 Calibration adapter hose and 4 hoods DPWLKIT100 Protection against water spray for IP66 version Tab 1 a 1 3 Calibration requirements Local standards may require control procedures for sensor calibration The main relevant standards require testing and calibration at least once a year The semiconductor sensors are calibrated for a specific gas The first calibration is performed by the manufacturer subsequent calibrations are performed by the installer 1 4 Maintenance Annual testing Tests must be performed annually to meet EN378 and F GAS standards Every 3 years Calibration recommended Every 5 6 years Gas sensor replacement and calibration recommended GETE ab 1 A check local regulations on calibration or testing requirements After exposure to a substantial gas leak element sensor should be checked and replaced if necessary Note following a significant gas leak with extended exposure check and if necessary replace the sensor 1 5 Technical specifications Semiconductor version Infrared Infrared R22 R134a R404a
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