Bacharach HFO1233ZD, Installation And Operation Manual

Page 1: ...Detector Installation and Operation Manual Instruction 6490 9000 September 2016 Revision 4 Product Leadership x x Training x Service x Reliability www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 2: ...UT NOTICE THE INFORMATION CONTAINED HEREIN IS BASED ON DATA CONSIDERED ACCURATE HOWEVER NO WARRANTY IS EXPRESSED OR IMPLIED REGARDING THE ACCURACY OF THIS DATA ALL GOODS MUST BE SHIPPED TO THE MANUFACTURER BY PREPAID FREIGHT ALL RETURNED GOODS MUST BE PRE AUTHORIZED BY OBTAINING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER CONTACT THE MANUFACTURER FOR A NUMBER AND PROCEDURES REQUIRED FOR PRODUCT ...

Page 3: ...S AND OR DISTRIBUTES HOLDS A PROPRIETARY INTEREST AND IS ALSO SUBJECT TO COPYRIGHT PROTECTION AND ALL RIGHTS ARE RESERVED NO PARTY MAY USE OR COPY SUCH SOFTWARE IN ANY MANNER OR FORMAT EXCEPT TO THE EXTENT THAT BACHARACH GRANTS THEM A LICENSE TO DO SO IF THIS SOFTWARE IS BEING LOADED ONTO MORE THAN ONE COMPUTER EXTRA SOFTWARE LICENSES MUST BE PURCHASED TECHNICIAN USE ONLY THIS UNIT MUST BE INSTALL...

Page 4: ...MGS 250 Manual 4 6490 9000 Revision 4 www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 5: ...igerated Spaces 18 2 2 4 Chillers 19 2 3 Mounting Procedure 19 SECTION 3 WIRING AND CONFIGURATION 22 3 1 Overview 22 3 2 Wiring Supply Power 24VAC or 24VDC 23 3 3 Wiring Alarm Output Analog Signal 25 3 4 Wiring the Digital Alarm Output Relay 26 3 5 Modbus Network Configuration 27 3 6 Conclusion 29 SECTION 4 OPERATION AND STABILIZATION 30 4 1 Power Up and Warmup 30 4 2 Stabilization 30 4 3 Perform ...

Page 6: ...tion Gas 46 SECTION 7 MODBUS COMMUNICATIONS 49 7 1 Introduction 49 7 2 Communications Settings 49 7 3 Analog Input Registers 50 7 4 Analog Output Registers 51 7 5 Input Status Flags 52 7 6 Output Status Flags 52 SECTION 8 TROUBLESHOOTING 53 8 1 Fault Codes 53 8 2 Diagnostics Attributes P 18 55 8 3 Resetting MGS 250 to Default Values 56 8 4 Other Symptoms 57 SECTION 9 REPLACEMENT PARTS AND ACCESSOR...

Page 7: ...ND CONFIGURATION 22 Figure 7 Terminal Blocks and Cable Glands 22 Figure 8 Supply Power Wiring Options 23 Figure 9 Maintaining Neutral Polarity 24 Figure 10 Analog Output Wiring 25 Figure 11 Sample Relay Output Wiring 26 Figure 12 Modbus Network Wiring 27 Figure 13 Setting Network Termination Resistors 29 SECTION 5 CONFIGURE THE GAS DETECTOR 33 Figure 14 The User Interface of the MGS 250 33 Figure ...

Page 8: ...Table 9 MGS 250 Behavior during Alarm Conditions 31 Table 10 MGS 250 Behavior during a Non Critical Fault 32 Table 11 MGS 250 Behavior during a Critical Fault 32 SECTION 5 CONFIGURE THE GAS DETECTOR 33 Table 12 Button Functions 33 Table 13 Parameter Numbers Names and Descriptions 34 SECTION 7 MODBUS COMMUNICATIONS 49 Table 14 Analog Input Registers 50 Table 15 Analog Output Registers 51 Table 16 I...

Page 9: ... basis or integrated into controls or a Building Management System BMS The MGS 250 can be used in locations that require continuous monitoring and to add gas detection solutions to an existing system Figure 1 MGS 250 Components 1 2 Detection Options 1 2 1 Broadband vs Gas Specific The MGS 250 NDIR refrigerant gas detectors are available in two versions broadband and gas specific www calcert com sa...

Page 10: ...ent performance is based on an average response profile for all of the gases within the group NOTE Greater accuracy may be achieved through the use of calibration gas and the adjustment procedure detailed in Section 6 Table 1 Broadband Gas Groups and Performance P N 6401 0500 Group Value for Param 11 1 Refrigerant As Shipped Accuracy 1 P 11 1 R123 35 R134a 25 R404a 35 R407a 25 R407c r20 R407f 20 R...

Page 11: ... Groups 1 3 1 2 3 Detecting Specific Gases Each gas specific gas detector PNs 6401 0501 to 6401 0520 is shipped factory calibrated to its specific target refrigerant Refer to Figure 3 and Table 2 www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 12: ...MGS 250 Manual 12 6490 9000 Revision 4 Figure 3 Gas Specific MGS 250 Gas Detectors www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 13: ...YF 5 6401 0514 HFO1234Ze 5 6401 0515 HFO1233ZD 5 6401 0516 R32 5 6401 0517 R448A 5 6401 0518 R449A 5 6401 0519 R513A 5 6401 0520 R452A 5 1 See Section 5 for information on Parameter 11 and other configuration instructions NOTE Gas specific detectors can be re calibrated in the field to new target gases Use optional calibration instructions in Chapter 6 for increased accuracy when detecting a new t...

Page 14: ...tector will have a lower accuracy for the target refrigerant without calibration In this example that accuracy is r16 of reading Optional Recalibration For Improved Accuracy By applying calibration gas containing the new target refrigerant and via the routine described in Section 6 4 the gas detector may then be adjusted to respond with the calibrated accuracy of r5 of reading as shown in Table 2 ...

Page 15: ...401 0500 MGS 250 Broadband 6401 0501 MGS 250 R22 6401 0502 MGS 250 R123 6401 0503 MGS 250 R134a 6401 0504 MGS 250 R404a 6401 0505 MGS 250 R407a 6401 0506 MGS 250 R407c 6401 0507 MGS 250 R407f 6401 0508 MGS 250 R410a 6401 0509 MGS 250 R422a 6401 0510 MGS 250 R422d 6401 0511 MGS 250 R427a 6401 0512 MGS 250 R507 6401 0513 MGS 250 HFO1234YF 6401 0514 MGS 250 HFO1234ZE 6401 0515 MGS 250 HFO1233ZD 6401 ...

Page 16: ...bits 1 Data bits 8 Parity None odd even programmable Stop bits 1 or 2 programmable Retry time 500 ms min time between retries End of msg Silent 3 5 characters Alarm Delay Selectable 0 to 15 minutes IP Rating Not IP rated An accessory splash shield is available for areas requiring additional protection from wash down Response Time T90 5 minutes Temperature Rating 22q to 104q F 30q to 40q C Humidity...

Page 17: ...nd easily reached switch or circuit breaker as means of disconnection NOTE Connect monitor power and signaling terminals using wiring that complies with local electrical codes or regulations for the intended application CAUTION Do NOT mount the MGS 250 directly to vibrating machinery as the vibrations may degrade the gas detector s performance 2 2 Mounting Locations 2 2 1 General Placement Guideli...

Page 18: ...kely sources of leakage such as the compressor expansion valves mechanical joints or cable duct trenches o Perimeter Detection where gas detectors completely surround the area or equipment x Halocarbon and hydrocarbon refrigerants are heavier than air gases and as such the gas detectors should be located near ground level 6 to 18 inches from the floor NOTE Gas detectors should be positioned just f...

Page 19: ...asp the back edge of the housing near the latch and pull the back away When mounted the housing is simply opened by pressing the top latch with a suitable screwdriver or other flat blade With the top latch depressed pull the housing apart by grasping the sides and pulling straight out With the housing separated the mounting base with terminal blocks will be visible See Figure 5 IMPORTANT Do not ap...

Page 20: ...mounting holes on the base Junction Box Mount Attach the MGS 250 base to the junction box using mounting hardware provided with your junction box through the two junction box holes Refer to Figure 6 for the locations of the two junction box mounting holes on the base 4 Unless you are ready to wire the device see section 3 carefully snap the cover onto the base unit Figure 5 Initial Housing Separat...

Page 21: ...MGS 250 Manual 6490 9000 Revision 4 21 Figure 6 Front and Back Views of MGS 250 Base www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 22: ...the top latch with a suitable screwdriver or other flat blade With the top latch depressed pull the housing apart by grasping the sides and pulling straight out Align and press together to close Figure 7 Terminal Blocks and Cable Glands NOTE The pre installed cable gland left and optional cable gland right have a cable capacity each NOTE Install the optional cable gland on the right side of the ba...

Page 23: ...wer the MGS 250 Connect wiring to the appropriate terminal locations see Table 5 Use 2 wires between 14 and 22 AWG Refer to Figure 8 for AC wiring left or DC wiring right Figure 8 Supply Power Wiring Options Table 5 Power Options and Terminal Block Connections Power Option Pin Label Wiring Termination 24 VAC 1 L 24V AC line 2 N 24V AC neutral 24 VDC 3 24V DC positive 4 GND 24V DC ground www calcer...

Page 24: ...olated from line voltage by double insulation or x an appropriately rated UL listed CSA Class 2 transformer Failure to comply can result in personal injury or death WARNING Neutral polarity must be maintained across units Refer to Figure 9 Figure 9 Maintaining Neutral Polarity www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 25: ...l display Connect two 18 to 20 AWG wires to terminal block positions 5 and 6 see Figure 10 noting ground and signal polarity per Table 6 Figure 10 Analog Output Wiring Table 6 Alarm Output Terminal Block Connections Function Pin Wiring Termination Analog Output 5 Analog output ground 6 Analog output signal The type of output signal on pins 5 and 6 is programmable using the analog output type param...

Page 26: ...ple Relay Output Wiring NOTE The relay can be programed to be failsafe normally energized By default the relay is set to be normally de energized This can be set using parameter P 06 Make relay connections NO NC or both using 18 to 20 AWG wires to terminal block positions 10 11 and 12 see Figure 11 noting normally open normally closed and common connectors per Table 7 Table 7 Relay Output Terminal...

Page 27: ...see Figure 12 noting inverted B and non inverted A signal connectors per Table 8 Figure 12 Modbus Network Wiring Table 8 Modbus Network Communications Connections Function Pin Wiring Termination Modbus Network Communications 7 RS 485 B inverted 8 RS 485 A non inverted 9 RS 485 shield IMPORTANT For Modbus network communications wiring use only 18 24 AWG shielded twisted pair wire with 120 ohm chara...

Page 28: ...ly If the MGS 250 is at the end of the RS 485 network then be sure to set the RS 485 terminator on the printed circuit board PCB to IN This applies a terminating resistor to the end of the wires per the requirements of the RS 485 protocol The terminator should be set to OUT for all other installation conditions IMPORTANT Be sure to enable the termination resistor on the device at each end of the n...

Page 29: ...ure the top and bottom snap locks are engaged IMPORTANT If the right cable gland was not needed during installation and wiring be sure to install the blanking plug IMPORTANT Do not apply caulking or other material around the gas detector base The gas detector relies on air exchange through the spaces between the base and the gas detector housing Do not obstruct the small gap around the housing and...

Page 30: ...s for freezer applications To manually zero the gas detector press and hold the UP and DOWN buttons simultaneously for 5 seconds The gas detector will beep and the display will show zEro when zeroing is complete The display will show fAiL if the temperature is changing too quickly or there is an active alarm condition Additionally certain system faults F 08 F 10 through 14 and or F 16 will prevent...

Page 31: ...ludes a 20 dead band to prevent alarm chatter if the concentration hovers near the alarm setpoint Once the alarm has been triggered it will remain latched until the concentration drops below 80 of the alarm setpoint 4 5 Gas Detector Faults 4 5 1 Overview There are two levels of fault monitoring built into the gas detector x Non critical x Critical 4 5 2 Non Critical Faults Non critical faults typi...

Page 32: ...recoverable condition Please refer to Section 8 for more information The following occurs when a critical fault condition exists Table 11 MGS 250 Behavior during a Critical Fault Item Behavior During Critical Fault State Green LED Off indicating the gas detector is off line Display Shows the appropriate fault code Analog Output 4 20 mA output Changes to 2 mA 1 5 V output Changes to 0 5 V 2 10 V ou...

Page 33: ...ke the display for 10 seconds Buttons functions are listed in Table 12 Table 12 Button Functions Button Description Used to access the parameter list Used to back up one level without writing to memory when the parameter list is active Used to mute the audible alarm for the time period configured in parameter P 12 Used to increment the value or parameter displayed Used to decrement the value or pa...

Page 34: ...Parameters Table 13 Parameter Numbers Names and Descriptions Parameter Description Maintenance Mode Sets gas detector to offline mode for 30 minutes 00 Gas detector is online with normal response to its surroundings default 01 Gas detector is offline and suppresses all outputs Display reads oFFL offline during 30 minute timeout Alarm Setpoint Sets desired PPM value range 75 to 3500 ppm above which...

Page 35: ...curs default to energizing at power up Failsafe In both cases the relay changes state when an alarm occurs failsafe is simply inverted This allows power failures to be detected as alarms 00 NO default mode 01 Failsafe mode Relay Latching Controls the relay latching behavior 00 OFF default Relay does not latch and resets once the alarm condition is removed 01 ON Relay remains latched reset by BMS c...

Page 36: ...peration or specific gas name for gas specific mode Broadband Select from 4 groups of gases 1 R134a R404a R407a R407c R407f R427a R507 HFO1233ZD R448a R449a 2 R422a R422d HFO1234YF and HFO1234Ze R513a R452a 3 R22 by itself 4 R32 by itself Specific Gas The actual refrigerant name is shown Select the appropriate refrigerant NOTE Gas specific detectors are factory calibrated to a single refrigerant u...

Page 37: ... to 0 Baud Rate Sets the baud rate for Modbus RS 485 communications 00 9 600 baud default 01 19 200 baud Stop Bits Sets the number of stop bits required to match the controlling communications equipment e g building management system etc 01 1 stop bit default 02 2 stop bits Parity Sets Modbus parity option 00 None default 01 Odd parity 02 Even parity www calcert com sales calcert com 1 888 610 766...

Page 38: ... the ppm level is greater than the programmed analog output Full Scale ppm P 16 the analog output will go to a 10 over range state indicating that the concentration is too high for the analog output to achieve For example for a 1 5 V setting the analog output would go to 5 5 V for 4 20 mA it would go to 22 mA and so on NOTE The analog output signal range is from 100 ppm to the default value of 350...

Page 39: ...MGS 250 Manual 6490 9000 Revision 4 39 Figure 15 Analog Output Scaling Options www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 40: ...ncentration replaces the four dashes See section 6 4 if using Gas Test Mode to initiate the calibration procedure NOTE To prevent false alarms all outputs are suspended while Test Mode is active The only live indication is the 4 digit display Once the gas test mode is enabled to perform a gas test or calibration the unit will automatically go offline for a ten minute period after the parameter lis...

Page 41: ... in troubleshooting the operator may choose to reset the gas detector to its default state by holding both the UP and DOWN buttons for 5 seconds while in the Diagnostics Menu All settings including the alarm setpoint gas adjustments the selected gas curve calibration data the Modbus address etc revert to specific default values after a reset IMPORTANT Calibrations on either gas specific or broadba...

Page 42: ...rminals NOTE The detector display is OFF when filtering is OFF P 09 is disabled NOTE Whenever filtering is OFF the detector display will turn ON for 10 minutes if the detector is re zeroed see Section 4 3 This is intended to aid maintenance testing The analog outputs continue to transmit the full unfiltered range and the alarm setpoint remains active NOTE If filtering is turned off 00 Analog Outpu...

Page 43: ...ut should never exceed 2 years CAUTION In applications where life safety is critical calibration gas adjustment should be done quarterly every 3 months or on a more frequent basis Bacharach is not responsible for setting safety practices and policies Safe work procedures including calibration policies are best determined by company policy industry standards and local codes CAUTION Failure to test ...

Page 44: ... 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 6 2 Bump Testing vs Adjusting Detector Response There are two concepts that need to be differentiated x bump test x gas detector response adjustment A bump test exposes the gas detector to a gas The operator then observes the ga...

Page 45: ...thers that testing is underway During bump testing the alarm outputs are active and will trigger whatever response is intended It is the operator s responsibility to ensure that such actions are acceptable and can be performed safely After installation and parameter setup see Section 5 the units should be bump tested Expose the gas detector to test gas The gas selected should be a high enough conc...

Page 46: ...nder Monitor the LED display reading Refer to the specifications section for acceptance criteria Figure 16 Using Calibration Gas 6 4 Adjustment Using Calibration Gas Adjustment Using Calibration Gas requires a gas cylinder with the appropriate gas and concentration Note that Bacharach offers a calibration kit that consists of a calibration gas cylinder and a flow regulation valve with flexible non...

Page 47: ...our dashes NOTE The analog outputs relay activity and RS 485 ppm reporting are suspended in Gas Test Mode to prevent false alarms 3 Expose the gas detector to gas from the cylinder Monitor the 4 digit LED display reading 4 Wait for the ppm reading to stabilize This should take approximately 4 6 minutes Minor changes less than 5 ppm in 10 seconds are considered stable readings Compare the response ...

Page 48: ...the gas detector will enter offline mode for a period of 10 minutes This allows time for the calibration gas to dissipate after testing During offline mode the gas detector suppresses all outputs The display reads oFFL offline during 10 minute timeout NOTE All calibration gas mixtures have a blend tolerance The tolerance will limit the actual adjustment accuracy that is achievable www calcert com ...

Page 49: ...ception of some of the communications parameters parameters you can access and or configure from the front panel of the MGS 250 can also be accessed and or configured via a Building Management System for example on the same Modbus network 7 2 Communications Settings There are 255 selections available to be set electronically from addresses 1 to 255 inclusive Modbus data with a zero in the address ...

Page 50: ... level 0 100 FS 1001 Concentration gas level 0 65 535 ppm 1002 Reserved 1003 Full scale detector level 0 65 535 ppm 1004 Alarm set point full scale 0 100 1005 Gas detector timer 0 65 535 hours 1006 Node address 1 247 none P 10 1007 Software version none 1008 Reserved 1009 Reserved 1010 Reserved 1011 Reserved 1012 16 bit fault code 0 65535 none www calcert com sales calcert com 1 888 610 7664 0 5 1...

Page 51: ... 15 min P 05 2004 Relay action 0 NO 1 Failsafe none P 06 2005 Relay latching enable 0 Disable 1 Enable none P 07 2006 Buzzer enable 0 Disable 1 Enable none P 08 2007 Display mode 0 Off 1 On none P 09 2008 Analog output type 0 0 5 V 1 1 5 V 2 0 10 V 3 2 10 V 4 4 20 ma none P 03 2009 Baud rate 0 9600 1 19200 none P 13 2010 Stop bits 1 or 2 none P 14 2011 Gas curve number 1 to 4 broadband unit or gas...

Page 52: ... or 1 ON 0 1 3004 Green LED state 0 or 1 powered on 0 1 3005 Reserved 3006 Start up 0 normal operation 1 warming up 0 1 3007 Reserved 3008 Reserved 7 6 Output Status Flags Output Status Flags are readable using function code 01 and writable using function code 05 Table 17 Output Status Flags Reg Description Range P 4000 Buzzer flag 0 or 1 ON 0 Off 1 On 4001 Test required If operating for 1 year 1 ...

Page 53: ...for the environmental conditions to return to a more typical condition correcting wiring mistakes or in some cases relocating the gas detector For example placing the gas detector near a forced air heater may cause temperature faults The non critical fault range is F 01 to F 08 Critical faults indicate a functional problem that results in the gas detector no longer monitoring its surroundings for ...

Page 54: ...g connection and or termination issue exists When analog output type is 4 20ma and loop is open use 18 24AWG shielded twisted pair with 120 ohm characteristic impedance for Modbus connections Modbus Fault 0x0020 Modbus message was truncated or timed out early PPM Over range Fault 0x0040 PPM exceeds 9999 This may indicate a very large gross leak If no leak is present it indicates a gas detector err...

Page 55: ...ist see Section 5 and select P 18 Press the Enter button to access the diagnostics and then use the UP or DOWN button to select each attribute The following information is available Table 19 Diagnostic Attributes Attribute Description Displays the current fault condition code in hex format 0000 no faults are active XXXX HEX number See Table 18 for the HEX format cross reference Displays a hex form...

Page 56: ...Resetting MGS 250 to Default Values The gas detector may be reset to its default state if needed to aid in troubleshooting All settings including alarm setpoint gas adjustments selected gas curve calibration data Modbus address etc revert to specific default values after a reset The broadband sensor option P N 6401 0500 resets to gas group 1 Gas specific products P Ns 6401 0501 through 6401 0520 a...

Page 57: ... seconds the user is returned to the parameter list at parameter P 18 4 The gas detector may now be re programmed for further troubleshooting if needed 8 4 Other Symptoms Other common wiring problems can also cause the gas detector to malfunction Check below for additional conditions that will cause gas detector issues Table 20 Other Symptoms and Possible Causes Symptom Possible Cause s Green powe...

Page 58: ... 6400 0025 Gas Detector Module R422d Calibrated 1 6400 0026 Gas Detector Module R427a Calibrated 1 6400 0027 Gas Detector Module R507 Calibrated 1 6400 0028 Gas Detector Module HFO1234YF Calibrated 1 6400 0029 Gas Detector Module HFO1234ZE Calibrated 1 6400 0030 Gas Detector Module HFO1233ZD Calibrated 1 6400 0031 Gas Detector Module R32 Calibrated 1 6400 0032 Gas Detector Module R448A Calibrated ...

Page 59: ...uarters of Bacharach Inc NOTE The Directives or Harmonized Standards to which this product has been evaluated may have changed Bacharach Inc however continues to market this product under a presumption of conformity even though the Standards may no longer be harmonized www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...