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Summary of Contents for Danfoss DGS-SC
- Page 1 Installation and Operation Guide Danfoss Gas Sensor Type DGS-SC and DGS-IR with MODBUS ADAP-KOOL® Refrigeration Control System...
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Page 2: Table Of Contents
6.7 Calibration of alarm setpoint ..........16 6.8 Calibration of 4-20mA output ..........16 6.9 Issue Test certificate ..............16 7. Installation ................17 8. Accessories ................21 9. Troubleshooting ..............22 Appendix A.................23 Appendix B .................24 Appendix C .................25 2 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 3: Overview
BMS systems including Danfoss AK-SM 720/ AK-SM 350 and the AK-SM 800 series. The DGS Modbus can be used: • in new buildings/areas that require continuous monitoring. -
Page 4: General Placement Guidelines
Weatherproof sensors should be used for unprotected outdoor applications. 4 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 5: Air Conditioning (Direct Systems Vrf/Vrv)
Ensure the sensor is mounted away from drafts and heat sources like radiators etc. and avoid sources of steam. Avoid mounting it under mirrors, at vanity units and in or near bed bathrooms. RS8HJ102 | 5 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 6: Dimensions And Mounting
5mm - 6mm screws Splashguard IP66 Airflow Duct Mount Housing IP66 Housing with Remote Sensor Head mounting slots = 9mm long x 6mm wide use 5mm - 6mm screws M42 thread 6 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 7: Installation And Wiring
The controller wiring is the same for all controllers. There is a 5-minute power-up delay to allow the sensor to stabi- lise. Also see section 5. Refer to Figure 1 for internal components and wiring. RS8HJ102 | 7 © Danfoss | ADAP-KOOL® | 2016.12... - Page 8 J7 J8 J9 J10 Board Ground Span Plane Test Point Audible AC Select 5 10 5 10 Alarm VOLTS MODBUS Relay Select 0V V+ 0V V Power Supply Output Signal 8 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12...
- Page 9 Reverse to close. With DGS-SC a retention strap fixates the sensor element during transportation. Remove it after open- ing the sensor enclosure by pulling the tap of the retention strap.
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Page 10: Jumper Configurations
DC Output Decide which DC voltage output range is required for the DC out- Selection put signal on connector CN2. See Figure 1 for jumper locations. (J7-J10) 10 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 11: Adjusting The Alarm Setpoint
NOTE: A Modbus setting takes priority over the hardware setting. If needed set the Modbus value to zero to re-activate the hard- ware setting. For R449A the maximum allowed alarm setpoint is 500 ppm. RS8HJ102 | 11 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 12: System Integration
TxD-/Rxd- Modbus Address To establish Modbus communication to Danfoss front end, configure the address using SW1 and SW2 and perform a network scan from the front end. The Baud rate may need changing. It must be set to 19,200 baud when used with AK-SM 720/AK-SM 350 and when AK-SM 800 is configured in SLV-mode (see manual for AK-SM 800 for further details). -
Page 13: Operation And Stabilisation
0.5V on the 1-5V output 1.0V on the 2-10V output Manual control It is possible to perform a manually control to verify the buzzer, LED's and alarm relay, see Section 7. RS8HJ102 | 13 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 14: Functional Tests And Calibration
There are two these components while lid is removed and when replacing it. types of bump test. IMPORTANT: If the DGS-SC is exposed to a large leak it should be Quantified: A known concentration of gas is used. -
Page 15: Bump Testing
NOTE: Gas ampoules are not valid for calibration or accuracy checks of the sensor. These require actual gas calibration, not bump testing with ampoules. Figure 7. Gas Ampoules for Bump Testing RS8HJ102 | 15 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 16: Calibration Overview
Adjust P3 until the voltmeter equals the voltage calcu- • Screwdriver (depending on housing). lated in section 6.4 Danfoss offers calibration gasses and a kit that consists of a flow 6.7 Calibration of alarm setpoint regulation valve with flexible non-absorbent tubing and vented See section 4.3... -
Page 17: Installation
The value is used both as delay for limit alarm and warning. Reset alarm in DGS unit Reset alarm Will mute the buzzer and reset the alarm relay. The alarm remains active (LED and Modbus) until the alarm condition disappears. RS8HJ102 | 17 © Danfoss | ADAP-KOOL® | 2016.12... - Page 18 Status of the green LED Green LED Displays the status of the green LED (unit powered ON). Can be operated in Manual Control mode 0 = off 1 = on 18 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12...
- Page 19 Warning Enable The communication system can only handle integer values in the range -32000 to 32000 and decimal values in the range -3200.0 to 3200.0. Value equals fullscale range of specific product RS8HJ102 | 19 © Danfoss | ADAP-KOOL® | 2016.12...
- Page 20 Installation and Operation Guide | DGS Modbus Service Read out of refrigerant (Gas) for the DGS is used for Refrigerant Value according to "Danfoss standard list". Gas Full scale in ppm 32000 Fullscale ppm Hours since last calibration 32000 hours...
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Page 21: Accessories
Accessories for calibration Code no Calibration kit 080Z2296 (excl. gas) 110l cylinder with 080Z2297 10.000 ppm CO 2 110l cylinder with 080Z2298 100% N 2 110l cylinder with 080Z2299 5.000 ppm CO 2 RS8HJ102 | 21 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 22: Troubleshooting
P1. To changing re-enable the setpoint adjustment via P1, set the Modbus parameter to '0' (zero). 22 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 23: Appendix A
4400 3911 2803 9000 9000 4500 4000 2866 9400 9400 4700 4178 2994 9800 9800 4900 4356 3121 10000 10000 5000 4444 2500 3185 * CFM = Cubic Foot per Minute RS8HJ102 | 23 © Danfoss | ADAP-KOOL® | 2016.12... -
Page 24: Appendix B
Installation and Operation Guide | DGS Modbus Appendix B DGS Modbus addressing 1-120 24 | RS8HJ102 | © Danfoss | ADAP-KOOL® | 2016.12... -
Page 25: Appendix C
Installation and Operation Guide | DGS Modbus Appendix C DGS Test Certificate (Example) (Download original from our web site www.danfoss.com. Use in Conjunction with the Danfoss Check Calibration Procedure) Product Description: DGS Serial Number: 12345 Date of First Calibration: (see Rating Label) 25/10/05... - Page 26 Installation and Operation Guide | DGS Modbus Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
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