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Gasmaster Issue 4

1. Detector Oscr Olov sIG g PwR L m Am supply Earth MTL 5041 Detector i a he NN Bette tee t te etetepeeeeseeey Oscr 7 Olov 8 Q sic PwR H2t 20 35 V dc L f supply Earth E Pepperl amp Fuchs KFD2 CR Ex1 30200 Figure 2 8 Typical connections for 2 wire I S detector with Galvanic Isolator Set channel link to SRCE see figure 2 5 and configuration to DET4 20 SRCE see Menu System Overview section page 21 and 29 8 gt CROWCON Gas Detection You Can Trust GasMaster Detector Type Link Protection Link FIRE SINK SRCE Fire detector 321 O SCR r lov Q sic ee Neda g pwR CHASSIS EARTH Figure 2 10 Connections for smoke heat detector Detector Type Link Protection Link FIRE SINK SRCE 321 Manual alarm call points 1K8 470R ess Figure 2 11 Connections for manual alarm call points Chassis earth 2 8 4 Environmental Sampling Unit ESU Figure 2 13 shows the wiring configuration for monitoring the ESU sampling device Gas detec ors fitted to the ESU should be cabled separately o the appropriate input channels on the Gasmaster or other control panel For connec ions details are shown on the instructions pro vided with t
2. View Menu Relay com stat Relay chan stat Output status Input status Supply status Configuration Note Menu items are hidden for unused channels t Visible only for 4 20 mA Sink SRC t Visible only for Fire conv type ANot present for Alarm 2 z View View Configuration Configuration Channels 1 to 4 Relays common Type Alarm L1 common Name Alarm L2 common Location Common Fault Units Ranget Zero suppression Interpret 2 mA Stab time Fire reset time Alarm 1 See Supervisor Alarm 2 configuration Figure 3 4 Overview of Gasmaster Menu system gt CROWCON Gas Detection You Can Trust r Action Menu Display contrast Control panel Audio visual Supervisor Menu Password Inhibit Zero Calibrate Test nl All Supervisor Menu options are password protected see page 19 for details of this menu Configure section e ee ee Us jl i Supervisor Supervisor Test Configuration Relays common System Channels 1 to 4 Language AV drive Relay common Channels 1 to 4 ena Supervisor Configuration Relay common Alarm L1 common Supervisor Alarm L2 common Configuration Common Fault Channels 1 to 4 iayy Type r z gt Name Supervisor Location Configuration Unitst Channels 1 to 4 Range Alarm 1 amp Alarm 2 Zero suppressiont Direction Interpret 2 mA On thresh
3. 0 66 Figure 3 2 User display Gasmaster 1 Display panel LEDs The LEDs on the Gasmaster Display Panel indicate the following Yellow Fault LED Lights when any detector or system fault is detected see page 20 for a list of fault mes sages The fault LED operates with the com mon fault relay and can be set as latched or non latched dependant on the system config uration Yellow Warning LED Lights when a warning condition is present see page 22 for a list of warning messages The warning LED will automatically reset when the cause is cleared Green Power LED Is normally on when power is present and will switch off briefly once every five seconds to indicate that the system is operational The LED will flash on and off every second when Gasmaster is operating from its batteries due to power failure Red Alarm Bar Will flash when an alarm from any channel is triggered and will remain in a steady on 16 GasMaster state when the accept reset button is pressed The LED bar will flash again if a new alarm is triggered Operator Panel Buttons Use the five operator buttons to respond to alarm conditions examine the status of system settings and configure Gasmaster S ACCEPTIRESET Press the Accept Reset button to mute the internal sounder and external alarms When alarm or fault conditions have cleared press Accept Reset again to reset the system
4. Batteries Beeb gt 2e gt gt t Sese 5 Battery connection diagram E 2a 3 29 23 23 ikaso ifie Haze ifie OSE Figure 4 1 Battery replacement Batteries should be checked regularly on units operating over 40 C 34 GasMaster Warning When replacing batteries care should be taken to ensure cables are re fitted as shown on the battery connection diagram Incorrect fitment of battery cables may result in a fire and or harm to personnel 4 5 Module Replacement In the unlikely event of a Gasmaster component failure Crowcon recommend that repair should not be undertaken by anyone other than Crowcon approved personnel Please contact Crowcon for details of your nearest service centre 4 6 Event logging Gasmaster records alarms faults and display panel button activities in an Event Log A maxi mum of 300 events are logged after which data is over written on a first in first out basis This function provides a record of all system activities which can be uploaded using Gasmaster PC soft ware at any time The event log is held in RAM volatile memory so in the event of a complete power failure all data will be lost 4 7 Service card A card is fitted to the inside of the front cover for logging service activity It is recommended that this card be filled in with the dates of services and details
5. Power supply Gasmaster comes fitted with an auto ranging power supply suitable for 100 240 V ac 50 60 Hz operation This provides a nominal 24 V dc supply with a maximum power of 60 W Alternatively Gasmaster can be powered from an external 24 V dc supply a maximum 60 W supply is required Gasmaster must never be connected to ac and dc supplies at the same time Installation The Gasmaster power supply contains no user replaceable fuses Short circuit protection Each detector input is short circuit protected Self resetting polyfuses are fitted to the 24 V power supply which will cut power in the event of a cabling fault and automatically reset when the fault is corrected Detectors with a maximum con sumption of 500 mA may be connected Circuit breaker If the equipment is permanently connected to a mains supply then a dedicated circuit breaker must be included in the installation to comply with EN 61010 1 The circuit breaker must be close to Gasmaster in easy reach of the operator It must be marked as the disconnecting device for the Gasmaster system and the ON and OFF posi tions must be clearly marked The circuit breaker must comply with the relevant requirements of IEC60947 1 and IEC60947 3 The protective earth must not be disconnected even when the breaker is activated p Batteries P Battery connection diagram z
6. K 22 2 No 152 Caution Read amp understand manual before operating Mount outside hazardous area See manual for relay contact ratings 2 Blacklands Way Abingdon Business Park Abingdon Oxon 0X14 1DY England Telephone 01235 557700 Fax 01235 557749 www crowcon com All rights are reserved No part of the document may be photocopied reproduced or translated to another lan guage without the prior written consent of Crowcon Detection Instruments Ltd Publication number M07624 Fourth edition January 2007 The Canadian Standards Authority CSA have only assessed the combustible gas portion of this instrument for performance GasMaster Contents Introduction 0 eee ee 1 1 1 About Gasmaster 1 1 2 About this manual 1 Installation eonia ene unak 2 2 1 Before installation 3 2 2 GON lalossp ies ype dasiieg les 24 3 2 3 Mounting 4 2 4 Cabling requirements 4 2 5 Installing gas and fire detectors 5 2 6 Installing output devices 5 2 7 Connecting mains power 5 2 8 Connecting input devices 6 2 9 Connecting output devices 10 2 10 Applying power 12 2 11 Battery back up times 12 2 12 Commissioning 13 Operation lt ocito crese Pewee eas 15 3 1 Gasmaster Operator Panel 15 3 2 Gasmaster start up sequence 17 3 3 How to adjust display contr
7. Test mode Chan 1 relay forced Channel alarm relay is being forced in 14 15 22 23 Test mode 30 31 38 39 1 denotes the channel number and therefore may read 2 3 or 4 on Gasmaster 24 gt CROWCON Gas Detection You Can Trust GasMaster Operation View menu shows system status and configuration but does not allow changes to be made Menu Item Values as shown on display Description Relay com stat Alarm L1 common L1 Level 1 Values No alarm L2 Level 2 n alarm Alarm L2 common Values No alarm n alarm Fault common Values No alarm The values show the current state of each relay relays may be normally energised or de energised dependant on configuration No alarm means the relay is in its normal state In alarm means the relay is in its alarm or fault state n alarm Relay chan stat Alarm L1 1 1 refers to the input channel use the Down button Values No alarm to scroll to channels 2 3 4 if appropriate n alarm L1 Level 1 Alarm L2 1 L2 Level 2 use the down key to view level 2 Values No alarm The values show the current state of each relay n alarm relays may be normally energised or de energised dependant on configuration No alarm means the relay is in its normal state In alarm means the relay is in its alarm state Output status Output 1 Values 0 0 to 25 5 mA 1 refers to the input channel us
8. Double click the Accept Reset button to exit the menu system and return to mes sage display UP and DOWN Use the Up and Down buttons to scroll through menu items Press and hold the Up or Down button to move quickly through the menu items Double click the Up or Down button to move directly to the top or bottom of the alpha numeric characters when configur ing text or entering the Supervisor pass word In Supervisor Mode see section 3 7 use the Up and Down buttons to change values or settings In normal non alarm conditions press and hold the Up and Down buttons to adjust the message display area brightness CONTINUE Use the Continue button to display avail able menus The menu system can be accessed during normal channel monitor ing alarm or fault condition Gasmaster has four standard menus plus one advanced menu See figure 3 4 on page 21 for an overview of Gasmaster s Menu System The standard and advanced menus are as follows gt CROWCON Gas Detection You Can Trust GasMaster E Faults Lists the fault conditions present m Warnings Lists the warning conditions present m View View current status of relays outputs detector inputs power supply and con iguration m Action Perform routine operations tests of con rol panel or audio visual alarms E Supervisor Perform password protected supervisor unctions inhibit channels calibration esting and configuration Use
9. Figure 2 2 Gasmaster chassis plate with display PCB board and batteries 2 3 Mounting All Gasmaster systems should be installed in a safe area Consider location cabling and earthing requirements Figure 2 3 provides a dimensional view of Gasmaster To access the mounting points first remove the front cover by unscrewing the fixings labelled in figure 2 1 Carefully remove the GasMaster sounder connector from the display PCB The cover should be placed in a secure location It is recommended that Gasmaster is positioned by hand in the desired location and a pencil used to mark the mounting hole positions Gasmaster should be removed before drilling the mounting holes gt 110 Ns gt fh 8 mi i Ik Js T v D qe Mounting holes Figure 2 3 Dimensional view of Gasmaster with mounting holes shown 2 4 Cabling requirements Cabling to Gasmaster and detectors must be in accordance with the recognised standards of the appropriate authority in the country concerned and must meet the electrical requirements of the detector Explosion proof Exd devices Crowcon recommends the use of steel wire armoured SWA cable Suitable explosion proof glands must be used m Intrinsically Safe I S devices Crowcon recommends the use of twisted pair cable with overall screen and sheath Suitable weatherproof glands mus
10. fault will be indicated Connection details are shown in sec tion 2 8 1 and 2 8 2 Conventional fire detectors A loop of up to 20 conventional smoke heat detectors for example Apollo series 60 devices can be connected to each Gasmaster input chan nel A fire loop can also comprise switched devices such as manual alarm call points or flame gt CROWCON Gas Detection You Can Trust GasMaster detectors and devices can be mixed on the same loop provided electrical characteristics are com patible and fire regulations allow Switched devices require a 470 Q series resistor Each fire loop must be terminated with a 1K8 end of line resistor which is monitored to provide indication of open circuit or short circuit faults Connection details are shown in section 2 8 3 Environmental Sampling Unit ESU Each Gasmaster input can monitor a Crowcon Environmental Sampling Unit ESU which enables detection of flammable or toxic gases over a wide area using a sample draw technique It is essential that the sampling device on the ESU is operating correctly and Gasmaster provides this monitoring function to ensure a sample is being drawn Gasmaster provides a 2 wire 24 V dc sup ply to the sampling device Separate Gasmaster input channels are required to monitor the gas detector or detectors fitted to the ESU Connection details are shown in section 2 8 4 mV bridge pellistor detectors Some flammable gas detectors manufac
11. 9 provides detailed information on connections to output devices 2 7 Connecting mains power Connect the external power supply using the two part screw terminals refer to figures 2 4 and 2 5 Gasmaster must be earthed either at the power connector earth terminal see Figure 2 4 or using he stud on top of the enclosure Live Neutral Earth ENL g s m on E Figure 2 4 Mains connection terminals on termi nal PCB Installation GasMaster MAINS CHANNEL COMMON INPUT ada z RELAY TERMINALS JENL tel 7 P A zay a am Day ES Fre ies ET T SINK m ov d amp A ee RL aA id PWRO z H H lg x CH2 SCR R lt Ln oy F ei EF L 18 ga 9 ig my ce 3 amp A L 3558S SCRQ R z Jz IZN S lt ad 3z mAH Ama epee ov w o fo Ye bon tHe aU LD es o5 5 i 23 5 3 33 pur K Lo ae E Pe al ov ix lt ov av OV wW Tr i isIG ina zE I amp PWR OG al Fa GASHASTER TERMINAL BOARD a ku RELAY 2 DISPLAY eaaet TA so ser Sows yee TERMINALS CONNECTOR 5 o Fouin
12. Instrument serial number and system iden tity The system identity and instrument serial number can be displayed during normal channel monitor ing alarm or fault conditions To display the system identity and instrument seri al number press and hold the Back button 17 Operation First the Local Service telephone number is dis played followed by the customer identity display After 10 seconds the serial number will automat ically be displayed on the next screen for approx imately 4 seconds The Continue button can be used to advance to he next screen Use the Back button to return o the previous screen The display will return to the normal operating display when finished 3 5 Using the menu system To enter the menu system press the Continue button The menu system can be accessed during normal channel monitoring alarm or fault condi tion The message area will display the following screen MENU Faults Note if the menu system has been accessed pre viously the menu item displayed will be the last actioned menu item For example if you were using Supervisor mode the last time the menu display will show this MENU Supervisor Use the Up and Down buttons to scroll through the menu list To exit the menu press and hold the Accept Reset button or press Back button as many times as necessary Menu display The top line of the message area displays the cur rent menu level S
13. Non latched means that the relay will stay active when the Accept Reset key is pressed but will reset automatically when the alarm has cleared Latch accept means that in an alarm condition the relay will reset when the Accept Reset button is pressed De energised means that the relay coil is not ener gised in a non alarm state normally de energised Energised means that the relay coil is energised in a non alarm state normally energised or fail safe Visible means that an alarm will trigger the alarm LED bar internal sounder external audible visual alarms and display the alarm message Hidden means that an alarm will only cause the alarm icon in the channel display to show No other audible or visual alarms will activate used for ventilation control applications A similar menu i Indication options are not available s available for Level 2 alarm relays with the exception that the Off Threshold and Alarm L2 1 Direction Threshold Relay type Relay drive 1 denotes the channel number and therefore may read 2 3 or 4 on Gasmaster 32 gt CROWCON Gas Detection You Can Trust GasMaster IV Maintenance Maintenance It is essential that any safety system such as Gasmaster is routinely checked Crowcon offer service contracts to ensure that this equipment is fully operational at all times As a minimum Crowcon recommend that sys tems are calibrated and tes
14. RS 485 terminals on Gasmaster systems ordered with the optional local communications connector will be used for terminating the con nector leads These leads must be removed if a remote RS 485 serial link is required 485A 485B SCR U2 RS485 TERM Figure 2 19 Gasmaster RS 485 terminals 2 10 Applying power Before applying power ensure that any con trol or shutdown systems to which the Gasmaster is connected are inhibited Once all field cables have been installed the bat teries can be connected as per the diagram attached to the chassis plate Refer to section 4 4 Gasmaster will not power up until an exter nal power supply is applied Apply power to Gasmaster from either the AC or 24 V dc external supplies Outputs are inhibited for a preset time after power up and the system will perform a start up sequence testing alarm indicators and the internal sounder If after a set tling period faults are reported check the sensor connections again or refer to Faults Menu on page 20 When power is applied the green Power LED will illuminate and flash every 5 seconds to indicate that the system is operational If the external supply fails Gasmaster will contin ue to operate from its internal batteries and the Power LED will flash every second The internal sounder will also beep once every 5 seconds Gasmaster should display all channels being mon itored Allow sensors to settle before commenc ing calibra
15. be shown for conventional fire channels only gt CROWCON Gas Detection You Can Trust 31 Operation GasMaster Supervisor menu allows system tests to be performed and configurations to be changed A pass word is required to enter this mode see section 3 7 for details cont Menu Item Values as shown on display Description Config channel Submenu Alarm L1 1 Level 1 alarm relay configuration or each channel Press the Up and Down but ons to cycle hrough con iguration for channels 2 3 4 Direction Values Rising Falling On threshold Values 0 1 to Range full scale Off threshold Values 0 1 to L1 On threshold rising alarms L1 threshold to full scale 0 1 Falling alarms Relay type Values Latched Non latched Latch accept Relay drive Values De energised Energised Indication Values Visible Hidden Rising alarms required where there is normally no gas Falling alarms required where gas should normally be present e g oxygen Level at which the relay will activate Level at which the Level 1 relay will reset Allows hys teresis for applications such as ventilation control where the fan should continue to run until the gas reaches a low level Latched means that in an alarm state the relay will stay active when the Accept Reset button is pressed and will only reset when the alarm or fault has cleared and the Accept Reset key is pressed again
16. is provided for wo wire transfer of all data to industry standard control systems Gasmaster logs all alarm and fault events so that hey can be investigated at a later stage using Gasmaster PC software There are two versions of Gasmaster MM Gasmaster 1 single channel unit for one gas detector fire zone or ESU sampling device Hi Gasmaster 4 four channel unit for one to four gas detectors fire zones or ESU sampling devices Gasmaster 1 is identifiable from Gasmaster 4 by having only a single channel display see figure 3 2 page 16 and a de populated terminal PCB All operating functions are identical to Gasmater 4 Gasmaster is designed for simple operation and all day to day functions can be performed from the front panel Please refer to section 3 for details on display operation 1 2 About this manual The manual is divided into sections which detail procedures for installing operating and maintain ing Gasmaster Gasmaster is a safety system and it is essential that all instructions are correctly fol lowed Details of the types of device that can be con nected to Gasmaster are shown in section 2 along with typical connection diagrams Section 3 gt CROWCON Gas Detection You Can Trust provides instructions for day to day operation of Gasmaster as well as detailed information on sys em configuration Warning Regular maintenance of any safety system is essential and failure to main
17. mode is active the Warning LED on the control panel will illuminate How to select values from a list 1 With the menu item selected use the Up and Down buttons to scroll through the available list items When the value you require is displayed press the Continue button For example when configuring the Units of a channel the possible settings are none FIRE PPB PPM LEL and VOL as you scroll through the list the unit symbol will appear on the display Press Continue to make a selection The menu screen will return to the next menu item in the list How to edit values of parameters 1 With the menu item selected press the Continue button Use the Up and Down buttons to change the parameter value Press Continue to accept new value The menu screen will return to the next menu item in the list How to edit text string values 1 With the menu item selected press the Continue button A flashing cursor will appear below the first character of 19 Operation the text string you are now in edit mode Use the Up and Down buttons to scroll through the character values See Appendix D for more information Note Double click the Up or Down button to move to the top or bottom of the alphabet list To enter numbers or ower case characters continue press ing the Up or Down button When you have selected the correct character press Continue the cursor will
18. of any parts replaced 4 8 Cleaning If required the outside of the Gasmaster case can be cleaned by gently wiping with a damp cloth using a mild soap solution only gt CROWCON Gas Detection You Can Trust GasMaster Appendix A Specifications Appendix A Specifications Gasmaster 1 Gasmaster 4 Size 288h x 278w x 110d mm 288h x 278w x 110d mm Weight 4 5 kg 4 5 kg Enclosure material Back box Painted steel Front cover fire retardant ABS plastic Back box Painted steel Front cover fire retardant ABS plastic Ingress protection IP54 IP54 Power 100 240 V ac 50 60 Hz 1 3 A or 20 30 V dc 60 W max 100 240 V ac 50 60 Hz 1 3 A or 20 30 V dc 60 W max Battery back up 1 2 Ah batteries fitted internally 1 2 Ah batteries fitted internally Operating temperature 10 C to 50 C 14 to 122 F 10 C to 50 C 14 to 122 F Humidity 0 to 95 RH non condensing 0 to 95 RH non condensing Input Gas One 2 or 3 wire 4 20 mA gas detec One to four 2 or 3 wire 4 20 mA gas tor sink or source Adaptor for mV detectors sink or source Adaptor for bridge type detectors available mV bridge type detectors available Maximum detector current 500 mA Maximum detector current 500 mA Fire One loop of up to 20 conventional One to four loops of up to 20 conven smoke heat detectors or manual call points or one flame detector 4 20 mA or digital
19. or accidental changes From the operator panel you can select menu items and associated values to configure relays and field devices All the menu items are explained in section 3 10 page 25 You can modify settings by Selecting values from a list Editing numeric values Editing text strings How to enter Supervisor mode 1 Press the Continue button to enter the menu system 2 Use the Up and Down buttons as necessary to select Supervisor and press Continue 3 You will be asked to enter a password press Continue Use the Up and Down buttons to enter the first char acter of the password The default pass word is ZZZ Note Double click the Up or Down button to move to the top or bottom gt CROWCON Gas Detection You Can Trust Operation of the alphabet list To enter numbers or lower case characters continue press ing the Up or Down button For convenience after the first charac ter has been entered the next character will start from the same point in the alpha numeric list To enter ZZZ use the Up and Down buttons to enter the first letter then simply press Down then Continue Down then Continue When you have selected the correct char acter press Continue the cursor will move to the next character position Continue entering the rest of the pass word When you have finished press the Continue button twice Note When the Supervisor
20. the Continue button and the Up and Down buttons to navigate through he menu system Use the Continue but on to select and action menu items sub menus and wizard menus During editing and configuration of Gasmaster use the Continue button to accept changes made to settings Ww BACK Use the Back button to exit the menu system or cancel actions Double click the Back button to cancel text edits or return to the main menu 3 2 Gasmaster start up sequence At power up during Gasmaster installation or when Gasmaster is restarted Gasmaster will ini tialise the system by performing a self test The start up sequence is shown below Display and AV test gt CROWCON Gas Detection You Can Trust Operation GASMASTERIT Software version number gt CROWCON Gas detection you scrolling text 1 CH4 2 02 3 H2S 4 FIRE 3 3 How to adjust display con trast To edit the display contrast press and hold the Up button to increase contrast and Down to decrease contrast The contrast level will be dis played Menu contrast The menu display contrast is altered independent ly from the channel display area Press the Continue button whilst still in the Menu Contrast screen use the Up or Down but ton to choose Menu Display or Channel Display Press Continue to select Adjust the display contrast as described above Press the Back button to finish 3 4 How to display
21. A Calibrate Calibration Wizard Select channel Values 1 name 2 name 3 name 4 name Cal 1 level Values 25 100 of range Select channel Inhibit Values Inhibit on Inhibit off User action Apply gas User confirmation Continue when reading is stable Use Down button to select the required channel to calibrate then follow wizard instructions Refers to the calibration gas concentration Calibration is only possible with a gas concentration that is at least 25 of the full range of the sensor Use the UP and Down buttons to enter the concentration of the calibration gas e g 50 LEL 10 ppm etc Gasmaster will store the gas value entered so that it does not need to be adjusted next time the sensor is calibrated Inhibit option will not be displayed if channels have already been set to inhibit using the Inhibit menu Apply gas and calibrate the detector Press Continue when the detector has been calibrated and is providing the correct output signal gt CROWCON Gas Detection You Can Trust 27 Operation GasMaster Supervisor menu allows system tests to be performed and configurations to be changed A pass cont word is required to enter this mode see section 3 7 for details Menu Item Values as shown on display Description Calibrate Calibration Wizard cont Result Value Pass Channel has correctly calibrated Fail Input signal was out of acceptable range re cali
22. M07624 Issue 4 January 2007 Gasmaster GASMASTER y cROWCON Installation Operation and Maintenance Manual B CROWCON Gas Detection You Can Trust The equipment described in this manual may have mains voltages applied to it Ensure correct safety procedures are adopted before working on the equipment The equipment described in this manual is designed for the detection of flammable and or toxic gases Detectors may be sited in hazardous areas Ensure local safety procedures are adopted before carrying out any maintenance or calibration work The equipment described in this manual may be connected to remote alarms and or shutdown systems Ensure that local operating procedures are adopted before carrying out any maintenance or calibration work C This product has been tested and found to comply with the European Directive 89 336 EEC and the EMC requirements of EN50270 It also complies with the Council Directive 73 23 EEC relating to electrical safety and the Low Voltage Directive It conforms to the CE Marking Directive 93 68 EEC D CROWCON MODEL GASMASTER Crowcon Detection Instruments Ltd 2 Blacklands Way Abingdon OX14 1DY UK Passed inspection by Date Tel 44 0 1235 557700 Fax 44 0 1235 557749 Wwww crowcon com Tested for electrical safety by Email sales crowcon com Date Copyright Crowcon Detection Instruments Ltd 2005
23. RDOUS AREA SAFE AREA _ Detector Type Link Protection Link Figure 2 12 Connections for conventional fire detectors for hazardous area 7 321 O O SCR TEL G jov fe z2 f alsi y O PWR Smoke or Heat Detectors LS Earth P amp F Z722 Zener Barrier Crowcon Part Number C03335 gt CROWCON Gas Detection You Can Trust Installation Remote ACCEPT RESET Close the contact momentarily to accept alarms and cancel audible alarms Close the contact again when the hazard is cleared to reset alarms Remote INHIBIT Closing the contact will inhibit alarms on all input channels Channels will remain inhibited until the contact is opened the Gasmaster will then return to its original state any channels that have been set to inhibit using the Supervisor menu will remain inhibited Figure 2 15 shows wiring con figurations for remote inputs Crowcon recommends screened cables for con necting remote switches The screen should be terminated at the appropriate SCR terminal Remote Accept Reset Global Inhibit Vv g Q ov a Q NEE Q INH A o wr arg L o o o Figure 2 15 Connections for remote inhibit accept reset inputs 2 9 Connecting output devices WARNING After accounting for internal power consumption the maximum power available for input and output devices is 48 W 2 9 1 Audi
24. V bridge type flammable gas detectors to Gasmaster 4 Comes with the connector for Gasmaster E07636 Accessory enclosure connector Connector for fitment to Gasmaster to enable an Accessory Enclosure to be connected Comes complete with wiring loom S011750 Front cover assembly for Gasmaster 1 Complete with labels sounder and seals S011555 Front cover assembly for Gasmaster 4 Complete with labels sounder and seals M01861 2 Flush mounting brackets For mounting Gasmaster into a panel 36 gt CROWCON Gas Detection You Can Trust GasMaster Appendix C Display characters Appendix C Display characters Message display area characters When editing strings of text for passwords detec tor location or system identity the following char acters are available Group1 lt space gt Group2 amp Group3 Group4 0123456789 Group5 a Group6 2 Group7 ABCDEFGHIJKLMN OPQRSTUVWXYZ Groups Group9 abcdefghijklmno pqrstuvwzyz Use the Up and Down buttons as described in sec tion 3 7 to select the required characters For some string types the available characters may be restricted only the applicable characters will be shown For example the detector name e g gas type is restricted to groups 4 and 7 numer als and upper case only single clicking or holding the Up button will advance forward through the avail able groups of characters ABCD XYZ012 789ABC etc single clicking or h
25. a In normal non alarm condition the message area displays the channel numbers and detector types e g CH4 refers to methane detector see follow ing example The symbol represents the channel number i e 1 is channel 1 gt CROWCON Gas Detection You Can Trust 1 CH4 2 02 3 H2S 4 FIRE In the event of an alarm this message area will display the channels in alarm and their location See section 3 8 for more information on alarm conditions ALARM 1 CH4 Boiler room If more then one channel is in alarm the alarm message will cycle through all mes sages In the case of a fault or warning brief details of the fault will be displayed See section 3 9 for more information on fault conditions Detailed fault and warning messages can be found in sec tion 3 10 FAULT 30 Chan 3 over range Note User messages longer then sixteen char acters are displayed as scrolling text If fault and alarm conditions are present at the same time alarm messages take priority Channel display area Gasmaster 4 has a large clear display which shows all gas levels simultaneously Gasmaster 1 has a display for one gas level only see figure 3 2 The image below shows details of the channel display area and icons that are used on Gasmaster 15 Operation Gas Channel reading number Fault ue Warning A g 1i 2 PPB Units Channel PPM Inhibit a LEL VN Alarms
26. accuracy of the cal ibration of the unit or the cosmetic finish of the prod uct The unit must be maintained in accordance with the Operating and Maintenance Instructions The warranty on replacement consumable items such as sensors supplied under warranty to replace faulty items will be limited to the unexpired warran ty of the original supplied item Crowcon reserves the right to determine a reduced warranty period or decline a warranty period for any sensor supplied for use in an environment or for an application known to carry risk of degradation or damage to the sensor Our liability in respect of defective equipment shall be limited to the obligations set out in the guarantee and any extended warranty condition or statement express or implied statutory or otherwise as to the merchantable quality of our equipment or its fitness for any particular purpose is excluded except as pro hibited by statute This guarantee shall not affect a customer s statutory rights Crowcon reserves the right to apply a handling and carriage charge whereby units returned as faulty are found to require only normal calibration or servicing which the customer then declines to proceed with For warranty and technical support enquiries please contact Customer Support Tel 44 0 1235 557711 Fax 44 0 1235 557722 Email warranty crowcon com gt CROWCON Gas Detection You Can Trust GasMaster Regional addresses UK Off
27. ach affected chan nel m lluminate the yellow Warning LED In the event of an alarm on an inhibited channel Gasmaster will m illuminate the Alarm symbol on the channel display for the affected channel E lluminate the red alarm LED bar m Display the alarm text message for the affected channel Gasmaster will not Operate any relays associated with the affected channel Drive external audible visual alarms Activate the internal sounder gt CROWCON Gas Detection You Can Trust GasMaster If it is necessary to permanently disable a channel enter Supervisor Mode and set the relevant detec tor Type to Unused see page 29 section 3 10 The channel display will then blank and the power supply will be removed from the detector Warning Crowcon strongly recommends that remote inhibit switches be key operated only and that access to the key should be restricted to authorised personnel A Gasmaster system that has been inhibited without other safety precautions being in place may not provide the protection for which it was designed Steps should be taken to ensure that all appropriate personnel are aware when a Gasmaster system is inhibited 3 7 Using the Control Panel in Supervisor Mode Supervisor mode provides all the functions required for trained personnel to perform system installation and configuration of field devices This area is a password protected to prevent mis use
28. arm settings to suit your requirements or adjust detector values carry out calibration and other confidence checks Your Gasmaster system can be configured using the Operator Panel and Menu System You will find details of the menu structure and configuration options over the next few pages refer to figure 3 4 for an overview of the menu structure To edit your systems configuration you must enter the Supervisor mode which is password protected to prevent miss use or accidental change Refer to section 3 7 for details on entering Supervisor mode For more information on testing your Gasmaster system please go to the Maintenance section on page 32 Gasmaster PC software is available which enables full system configuration from a PC An optional communications port is required if Gasmaster PC is to be used contact Crowcon for details 3 10 2 Re configuring a channel Your Gasmaster system is supplied pre config ured but you may require to re configure when a detector is changed or a new detector is added This section provides details on configuring chan nels refer to page 29 Channels 1 to 4 from the Supervisor configuration menu 3 10 3 Limitations If Gasmaster is used in a manner not specified in this manual the protection provided may be impaired gt CROWCON Gas Detection You Can Trust Operation 21 Operation Menu system overview GasMaster Over the next few pages you will find a de
29. ased a non configured Gasmaster 4 Please follow the installation instructions for a pre configured Gasmaster 4 Additional informa tion on setting up your Gasmaster system can be found in section IlI Operation Step by step instructions The installation and commissioning of your Gasmaster system is presented in easy to follow instructions A summary table of contents detail ing a typical sequence of installation steps is shown below Depending on your configuration some or part of each step may be omitted GasMaster Warning Gasmaster is not certified for use in hazardous areas but may be connected to detectors and or alarm devices which are installed in a hazardous area Instructions for field devices must be closely observed when installing a Gasmaster system 2 1 Before installation 2 2 General 2 3 Mounting 2 4 Cabling requirements 2 5 Installing gas and fire detectors 2 6 Installing output devices 2 7 Connecting mains power 2 8 Connecting input devices 2 8 1 Two wire devices 2 8 2 Three wire devices 2 8 3 Heat smoke detectors 2 8 4 Environmental Sampling Unit ESU 2 8 5 Flame detectors 2 8 6 Remote inhibit and accept reset inputs 2 9 Connecting output devices 2 9 1 Audible visual alarms 2 9 2 Common relay connections 2 9 3 Channel relay connections 2 9 4 Analogue outputs 2 9 5 RS485 communications 2 10 Applying power 2 11 Battery back up time power calculations 2 12 Commissioning 2 12 1 Ze
30. ast 17 3 4 How to display Instrument serial number and system identity 17 3 5 Using the menu system 18 3 6 Inhibiting channels 18 3 7 Using the Control Panel in Supervisor Mode 19 3 8 Inthe event of analarm 20 3 9 In the event of a fault 20 3 10 System Configuration 20 Maintenance 020 33 4 1 Functional Testing 33 4 2 System Inhibit 33 4 3 Detector Calibration 34 4 4 Changing Batteries 34 4 5 Module Replacement 34 CROWCON Gas Detection You Can Trust Contents 4 6 Eventlogging 34 4 7 Service card 2 34 4 8 Cleaning 34 Appendix A Specifications 35 Appendix B Spare Parts and Accessories 36 Appendix C Display characters 37 Warranty Statement 38 Regional addresses 39 GasMaster I Introduction Introduction 1 1 About Gasmaster Gasmaster is a gas and fire control panel designed to monitor remote gas and fire detec tors Gasmaster can also monitor flame detectors as well as Crowcon s ESU product The status of each input is displayed on a large clear LCD dis play and alarms or faults are indicated by clear LEDs and an integral sounder Relay outputs are provided for alarms and faults as well as dedicated outputs for audible visual alarms An RS 485 Modbus output
31. ate c s a in awg given in brackets Cable lengths should be calculated according to the equations defined in the detector instructions sheet and the cable and Gasmaster characteristics specified above There are a number of suitable ways of terminat ing cables and glands to Gasmaster dependant on the cable and gland type Steel wire armoured SWA cable and glands with electrical termination of the armour to the enclosure via the gland Screened cable with the screen terminated inside the enclosure via a metal tag attached to the gland Screened cable using an EMC gland where the screen is terminated to the enclosure via the gland gt CROWCON Gas Detection You Can Trust Installation For detectors 4 20 mA outputs and RS 485 terminations screened cable where the screen is connected to the SCR terminal on the appropriate terminal strip 2 5 Installing gas and fire detectors Install gas and fire detectors as per instrument installation manuals paying attention to location and cabling requirements For ESU devices please refer to installation manual provided 2 6 Installing output devices Gasmaster can drive 24 V dc audible visual alarms directly via the Audible Visual drive terminals on the terminal PCB Relays are provided for switch ing additional outputs and 24 V dc 200 mA aux iliary supplies are available adjacent to each block of relay terminals for switching low power devices Section 2
32. av3 fo aw AV2 0 Loop all connections S AVI 0 to a second audible zvo visual alarm if re quired Figure 2 16 Connections for AV drive Common Alarm and Fault relay configurations can be set using the User Control Panel and Menu System See section i Operation on page 14 for details NO Contacts shown LU de energised non inverted POL zZ p Pld Lt Contacts shown energised inverted O POLE 2 NO Figure 2 17 Gasmaster contacts for all relays are identified on the terminal PCB gt CROWCON Gas Detection You Can Trust GasMaster 2 9 3 Channel relay connections Gasmaster 4 provides Double Pole Change Over DPCO relays for each channel The relays provide a contact rating of 250 V ac 8 A non inductive 5 A inductive for Alarm 1 and Alarm 2 Each relay can be set in its non active state as energised Fail safe or de energised Refer to figure 2 5 for location of Channel Relay terminals and figure 2 17 for contact definitions Terminals are fitted adjacent to all relay blocks to provide 24 V dc 200 mA supplies for switching low power devices Channel Alarm thresholds and configurations can be set using the User Control Panel and Menu System See section Operation on page 14 for details Fire Channels Conventional fire channels will activate both Alarm 1 and Alarm 2 relays on the affected channel in the event of an alarm The Common Alarm 2 relay only will a
33. ble visual alarms Figure 2 16 shows a typical wiring configuration for 24 V dc audible visual alarms The Audible Visual drive output from Gasmaster is capable of providing up to 650 mA which equates to two general purpose audible visual alarm devices Two separate sounder outputs are provided to acti vate on level 1 and level 2 alarms respectively ter minal AV2 becomes active on alarm level 1 AV3 becomes active on alarm level 2 Figure 2 16 shows connections to an audible visual alarm device that can produce different tones for level 1 and 2 alarms If a single tone device is used con nections to the sounder should be made to termi nals AV2 and 0 V only Terminal AV1 is intended to drive a visual alarm and activates on a level 1 alarm 10 GasMaster 2 9 2 Common relay connections Double Pole Change Over DPCO relays with contact rating of 250 V ac 8 A non inductive 5 A inductive are provided for Alarm 1 Alarm 2 and Fault Each relay can be set in its non active state as energised Fail safe or de energised It is common practice to set the Fault relay as Fail Safe so in the event of power loss the fault relay will change state See figure 2 5 for Common Relay terminal location and figure 2 17 for contact def initions Terminals are fitted adjacent to all relay blocks to provide 24 V dc 200 mA supplies for switching low power devices AUDIBLE VISUAL BEACON SOUNDER ov 1 S2 YL
34. brate the detector and check that its output current is proportional to the gas level User action Reminds the user to remove the calibration gas and Purge gas re expose the detector to clean air Test Relay common Forces common level 1 2 or Fault relays Use to simulate Relay alarm L1 Alarm L1 common L1 Level 1 L2 Level 2 inputs and Values No alarm The values show the current state of each relay outputs for n alarm rela b ised or de energised testing and ys may be normally energised or de energise commissioning Relay alarm L2 dependant on configuration Ea purposes Alarm L2 common No alarm or No fault means the relay is in its Values No alarm normal state n alarm In alarm or In fault means the relay is in its alarm Fault or fault state Fault common Use the Up and Down buttons to change the relay Values No fault state press Back to exit the relay will return to its n fault normal state Channel 1 2 3 4 Use the Up and Down buttons to select the desired channel The channel warning symbol A will show Channel alarm relays can be tested as described above Sim Input 1 When selected displays the input signal level for the Values 0 0 25 5mA selected channel e g 4 1 mA 0 0 66 7 mA The channel warning symbol A will show for fire detectors Use the Up and Down buttons to force the input to the required level The reading on the channel display will change a
35. ccordingly and alarms will activate at the preset points Use the Accept Reset button to silence alarms if nec essary Press Back to exit the input will return to its normal state Force output 1 When selected displays the analogue output signal Values 0 0 25 5mA level for the selected channel e g 4 1 mA The channel warning symbol Awill show Use the Up and Down buttons to force the output to the required level No alarms will be activated on Gasmaster Use to test remote displays Press Back to exit the input will return to its normal state 28 gt CROWCON Gas Detection You Can Trust GasMaster Operation Supervisor menu allows system tests to be performed and configurations to be changed A pass cont word is required to enter this mode see section 3 7 for details Menu Item Values as shown on display Description Relay alarm L1 Forces level 1 2 relays for the selected channel Values No alarm The channel warning symbol A will show In alarm Contact orientation will depend on whether the relay Relay alarm L2 is configured as normally energised or de energised Values No alarm Press Back to exit the relay will return to its normal In alarm state Configure Select from config sub menus Use to change system settings below System ModBus addr Required for RS 485 digital communications only Values 1 to 254 any address in the range can be chosen If multiple units are connected on a
36. contact signal tional smoke heat detectors or manual call points or one to four flame detec tors 4 20 mA or digital contact signal Environmental Sampling Unit control For use with one Crowcon ESU sam pling device For use with one Crowcon ESU sam pling device Remote inhibit Via normally open contact Via normally open contact Remote reset Via normally open contact Via normally open contact Outputs Relays Low alarm High alarm Fault DPCO contacts rated at 250 V ac 30 V dc 8 A non inductive load 5 A inductive load Low alarm and High alarm per chan nel plus Common Low High and Fault DPCO contacts rated at 250 V ac 30 V dc 8 A non inductive load 5 A induc tive load Audible visual 24 V dc 650 mA maximum drive typi 24 V dc 650 mA maximum drive typi alarm drive cally 2 devices max cally 2 devices max Analogue 4 20 mA current source max loop 4 20 mA for each channel current resistance 700 Q or source max loop resistance 700 Q 1 5 V dc min load 50 KO or 1 5 V dc min load 50 KO Digital RS 485 Modbus RTU RS 485 Modbus TRU communications 9600 Baud 8 Data bits No parity 2 Stop bits 9600 Baud 8 Data bits No parity 2 Stop bits Communications port Optional 3 way connector for PC con figuration and event log upload Optional 3 way connector for PC con figuration and event log upload Event logging Time
37. ctivate 4 20 mA flame detectors will activate two levels of alarm as per a gas detector ESU Channels If the ESU sampling device slows significantly causing reduced sample flow the Alarm 1 relay for that channel will activate If the sampling device stops the Alarm 2 relay will activate The Common Alarm relays will not activate if the sampling device slows or stops If the cable to the sampling device is open or short circuited the Common Fault relay will activate 2 9 4 Analogue outputs Gasmaster provides an analogue output for each channel which can be set as either 4 20 mA or 1 5 V dc by fitting a link see Figure 2 18 These signals can be used to drive PLC DCS SCADA sys tems or remote displays 4 20 mA outputs are current source resolution 0 1 mA and can drive a maximum load of 700 Q 1 5 V outputs require a minimum load of 50 KQ Analogue outputs will function in the following way 4 20 mA gas detectors the output will track the input from 3 to 21 5 mA the signal will drop to O mA if the input rises above 21 5 mA to signal a fault A sensor signal that is greater than 110 of gt CROWCON Gas Detection You Can Trust Installation range is designated by Gasmaster as a fault con dition The signal will be set to 2 mA to indicate when a channel is inhibited and O0 mA when a channel is in fault Fire channels a signal of between 4 and 12 mA indicates a no fire condition 12 20 mA indicates a fire OmA in
38. dicates a fault open or short circuit A 2 mA signal indicates that a channel is inhibited ESU channels a signal of between 4 and 12 mA indicates the sampling device is operating correct y 12 20 mA indicates a sampling device failure O mA indicates a fault open or short circuit A 2 mA signal indicates that a channel is inhibited SCR Qs LK7 5 ovi 9 Link 1 5v o SIG INo Link 4 20mA SCR 5 o Q5 LK8 5 ovj O S Link 1 5v SIG QINo Link 4 20mA 5 SCR Qs t LK9 3 ov Link 1 5V SIG Q No Link 4 20mA 4 SCR Qe E j 1kK1 3 oy Link 1 5V SIG QINo Link 4 20mA Figure 2 18 Gasmaster analogue output connec ion terminals 2 9 5 RS 485 communications Gasmaster can provide alarm and system infor mation to PLC DCS SCADA systems via a two wire link using the Modbus RTU protocol 9600 baud 8 data bits no parity 1 or 2 stop bits Up to 16 Gasmaster systems can be multi dropped on a single two wire link with a maximum cable length of 1 Km two core twisted pair cable is rec ommended Single Gasmaster systems that are to communicate via the RS 485 link should have the RS485 TERM link made which connects a termi nating resistor For multi dropped systems the RS485 TERM link should be removed from all Gasmasters except the last unit on the line A Modbus specification document is available from Crowcon on request 11 Installation The
39. e 17 and the Menu System Overview on page 20 in the Operation chapter for details of this function If it is necessary to permanently disable a channel enter Supervisor mode and set the relevant detec gt CROWCON Gas Detection You Can Trust tor Type to Unused see page 29 The channel display will be no longer shown and the power supply will be removed from the detector Warning Crowcon strongly recommends that remote inhibit switches be key operated only and that access to the key should be restricted to autho rised personnel A Gasmaster system that has been inhibited without other safety precau ions being in place may not provide the pro ection for which it was designed Steps should be taken to ensure that all appropriate person nel are aware when a Gasmaster system is inhibited How to perform Inhibit 1 From the normal operating display press the Continue button to enter the menu system 2 Use the Up and Down buttons as necessary to select Supervisor and press Continue 3 Enter the password the default pass word is ZZZ press Continue See section 3 7 in Operation for details on entering Supervisor mode 4 How to set global inhibit From the Supervisor menu scroll down to Inhibit and press Continue Select All and press Continue Use the Up or Down button to set inhibit to NHIBIT ON press Continue to accept Use the Back button to return to
40. e calibration ensure the channels are inhibited prior to apply ing gas Channels can be inhibited glob ally or individually Follow the instructions given in step 4 in Zero Adjustment 3 From Supervisor menu scroll down and select Calibrate 4 Select the channel to calibrate Press the Continue button to step through the Calibrate Wizard Ensure the channels are inhibited prior to applying gas 5 The next wizard screen displays the default calibration gas concentration as 50 of range If necessary this calibra tion figure must be adjusted to match the concentration of the calibration gas used Adjust the value using the Up and Down buttons as necessary and press Continue 6 When Apply Gas is displayed apply gas to the detector and press Continue allow readings to settle 7 Press Continue when the reading on the appropriate channel is stable and the detector has been calibrated accord ing to Its instructions Gasmaster will display Pass when successful or Fail if the detector sig nal is out of range 8 Calibration is complete when Purge is displayed remove the gas from the detector 14 GasMaster Use the Continue button to calibrate another channel or Back button to exit Supervisor mode and return to the main display 9 Ensure that all channel inhibits are removed after calibration is complete 2 12 2 Testing fire channels To test smoke detectors
41. e the Down button to scroll to channels 2 3 4 if appropriate The values show the current analogue output level for a channel Input status Input 1 Values 0 0 to 66 7 mA 1 refers to the input channel use the Down button to scroll to channels 2 3 4 if appropriate The values show the current signal input level for a channel Supply status Configuration Supply Value 19 8 to 40 V See table Supervisor menu Indicates the DC supply level from either the internal PSU or an external DC supply 1 denotes the channel number and therefore may read 2 3 or 4 on Gasmaster gt CROWCON Gas Detection You Can Trust 25 Operation GasMaster Actions menu allows basic tests and adjustments Menu Item Values as shown on display Description Audio visual Audio Visual Test alarm Values Testing beacon Testing alarm L1 Testing alarm L2 Test complete Drives Audible Visual alarm terminals to test external audible visual alarms Beacon output becomes active for 3 seconds followed by Sounder level 1 output becomes active for 3 seconds followed by Sounder level 2 output becomes active for 3 seconds followed by Outputs de activate and display returns to the Audio Visual menu Control panel Control Panel Start test Test complete Press Continue to test LCD display LED s and internal sounder for 3 seconds Displa
42. ero Wizard offers temporary Inhibit but you may wish to Inhibit all channels during the calibration process How to set global inhibit From the Supervisor menu scroll down to Inhibit and press Continue Select All and press Continue Use the Up or Down button to set inhibit to INHIBIT ON press Continue to accept Use the Back button to return to the Supervisor menu The Inhibit icons will appear on the channel display How to set channel inhibit Channel inhibit can be selected from the Inhibit menu or within the Zero or Calibrate menu Follow the instructions provided above selecting the Channel n where n represents the channel num ber in place of All From the Supervisor menu use the Up and Down buttons to select Zero by pressing the Continue button Select the channel to apply zero Press the Continue button to step through the Zero Wizard Press Continue when Only con 13 Installation tinue if in clean air isdis played ensure the detector has been cor rectly zeroed first i e 4 mA Press Continue to apply Zero now Gasmaster will display Pass when zero is successful or Fail if the detector zero is out of range 8 Use the Continue button to Zero other channels or Back button to the Supervisor menu to continue calibration Calibration 1 Follow points 1 to 3 above in Zero adjustment to enter Supervisor mode 2 Before you commenc
43. front cover removed the chassis plate is accessible which supports the display PCB and batteries Below the chassis plate is the terminal PCB which contains all the input and output terminals and power terminals The display PCB is con nected to the terminal PCB via a 50 way ribbon connector and is hinged on the left side so that it can be moved to provide access to the detector input terminals Most terminals are accessible once the display PCB is moved and the batteries are removed however if necessary the chassis plate can be removed for easier terminal access by carefully disconnecting the display PCB ribbon connector from the terminal PCB and unscrewing the four fixings Care should be taken when re gt CROWCON Gas Detection You Can Trust Installation Front cover Gland Terminal PCB knock outs 0 Optional comms port Figure 2 1 Exploded view of Gasmaster fitting the display PCB so as not to damage the connector or ribbon cable Six punched cable gland knock outs are provided on the top and bottom of the enclosure The knock outs are suitable for M20 Y2 NPT or PG13 5 cable glands To remove Knock outs tap around the edge of the recessed flange using a small ham mer and a screwdriver The knocks outs should then come away from the enclosure Knock outs should be removed prior to mounting Gasmaster and great care must be taken to avoid damaging internal components
44. gure 2 9 shows a typical wiring configuration for a 3 wire detector Set the link for the appropriate channel to S NK for a current sink detector or SRCE for a current source detector the protection ink should short 1 amp 2 refer to figure 2 5 Detector Type Link Protection Link FIRE FIRE SINK fam OR SINK L sa SRCE SRCE CHASSIS EARTH m SCR ov SIG PWR Figure 2 9 Connections for 3 wire detector 2 8 3 Heat smoke detectors Conventional fire detectors for safe area use should be setup according to figure 2 10 and 2 11 Conventional fire detectors for hazardous area use should be setup according to figure 2 12 Figure 2 11 shows connections for manual alarm call points Installation GasMaster Detector Type Link Protection Link HAZARDOUS AREA SAFE AREA iN 321 Gas Detector pag A Pcr F D e fe ob Y y PWR 4 20mA Current Sink l S Earth P amp F Z722 Zener Barrier Crowcon Part Number C03335 Figure 2 7 Typical connections for 2 wire I S detector with Zener barrier Set channel link to SINK see figure 2 5 and configuration to DET4 20 SINK see Menu System Overview section page 21 and 29 Detector Type Link Protection Link SAFE AREA FIRE SINK L 321 HAZARDOUS AREA
45. he ESU Detector Type Link Protection Link FIRE SINK j 321 SRCE m ESU sampling CHASSIS device terminal EARTH box l lscR Olov ey Q sIG Lg pwR Figure 2 13 Connections for ESU sampling device Installation 2 8 5 Flame detectors Figure 2 14 shows a typical wiring configuration or a 4 20 mA 3 wire Flame detector Set the detector type link appropriate for the type of lame detector refer to figure 2 5 Do not set link to FIRE Detector Type Link Protection Link OR SRU ay SRCE a CHASSIS EARTH SINK jamm 4 20 mA Flame detector scr ov SIG g PwR Figure 2 14 Connections for 4 20 mA 3 wire Flame detector 2 8 6 Remote inhibit and accept reset inputs Gasmaster has inputs for the connection of remote switches to inhibit alarm outputs or accept and reset alarms Inputs are activated when pulled down to 0 V the open circuit voltage is 5 V de Warning Crowcon strongly recommends that remote inhibit switches be key operated only and that access to the key should be restricted to autho rised personnel A Gasmaster system that has been inhibited without other safety precautions being in place may not provide the protection for which it was designed Steps should be taken to ensure that all appropriate personnel are aware when a Gasmaster system is inhibited HAZA
46. ice Crowcon Detection Instruments Ltd 2 Blacklands Way Abingdon Business Park Abingdon Oxfordshire 0X14 1DY Tel 44 0 1235 557700 Fax 44 0 1235 557749 Email crowcon crowcon com Website http Awww crowcon com USA Office Crowcon Detection Instruments Ltd 21 Kenton Lands Road Erlanger Kentucky 41018 1845 USA Tel 1 859 957 1039 or 1 800 5 CROWCON Fax 1 859 957 1044 Email salesusa crowcon com Website http Awww crowcon com Rotterdam Office Crowcon Detection Instruments Ltd Vlambloem 129 3068JG Rotterdam Netherlands Tel 31 10 421 1232 Fax 31 10 421 0542 Email eu crowcon com Website http Awww crowcon com Singapore Office Crowcon Detection Instruments Ltd Block 192 Pandan Loop 05 01 Pantech Industrial Complex Singapore 128381 Tel 65 6745 2936 Fax 65 6745 0467 Email sales crowcon com sg Website http Awww crowcon com gt CROWCON Gas Detection You Can Trust 39 Crowcon Detection Instruments Ltd 2 Blacklands Way Abingdon Business Park Abingdon Oxfordshire OX14 1DY Tel 44 0 1235 557700 Fax 44 0 1235 557749 Email crowcon crowcon com Website http Awww crowcon com
47. inhibit the relevant FIRE channel and use a smoke test aerosol to test each detector on a loop in turn The channel display will indicate FirE when the detector activates Each detector on a loop should be reset before testing the next to ensure that all detectors acti vate the alarm Heat detectors can be tested with a heat gun using the same method as described above Flame detectors can either provide a signal using contacts or a 4 20 mA signal A contact type detector will be connected as a con ventional fire loop using 470 Q series resistors and a 1K8 end of line resistor and will only indicate FIRE or FAULT A 4 20 mA detector will be connected directly as a 4 20 input and may have various alarm levels to indicate UV or IR activation please refer to the instructions supplied with the device for details Flame detectors require a UV or IR torch depending on detector type to simulate alarms Inhibit the relevant channel shine the torch at the detector and check that FirE is shown on the Gasmaster display For 4 20 mA detectors also check that the appropriate alarm level is displayed 2 12 3 Testing ESU channels To test a channel monitoring an ESU sampling device inhibit the channel and manually slow the device check that Alarm Level 1 is activated Manually stop the device and check that Alarm Level 2 is activated If the alarms do not activate the thresholds may need changing refer to section 3 10 for details on how t
48. kst 5v oy IN i sIc No Link 4 2 mAii ov T 39 n sar TE ov 4 Sal at g 5 ov Ei ink 1 5v z fa A a 55 3 Sio No Link 4 20mA 2 g LINK TO n e ser f wai f We CHASSIS BAT QV OV 28V 5 ov Liink 1 5v MNu ae ON NON Ow RD BK BK OR 19 fo an No Link 4 20mA x aR a m S SYSTEM lu RE oe aml ewes me a H H HL 3 fo Link 4 20 wz z L d a25 J I LINK TO Ys rc 2l ht tg Wane 4 m chassis O wee Trem jw CH elf ON LS x z a ov ov SYSTEM h ov ov ONLY ANALOGUE RS 485 MODBUS EXTERNAL OUTPUT COMMUNICATIONS E ee 24V DC TERMINALS TERMINALS AUDIBLE VISUAL INPUT ALARM TERMINALS Figure 2 5 Terminal PCB layout 2 8 Connecting input devices Gasmaster provides connectivity to a range of gas and fire detectors using two part connectors with screw terminals Each channel input can accept 4 20 mA or conventional fire loop Note Gasmaster 1 has one channel only This channel can be used to detect one gas detector fire zone or ESU Details of hardware configurations and link set tings can be found in section 2 8 1 to 2 8 6 4 20 mA Inputs Gasmaster provides analogue 4 20 mA inputs with a sensor supply voltage of 19 to 28 V dc and measures the signal across a 98 Q sense resistor Inputs can be gas detectors or flame detectors in 4 20 mA 2 wire sink or 3 wire sink or source con figurations Gasmaster will track inputs from 3 to 21 5 mA at which point an over range
49. lay will stay active when the Accept Reset button is pressed but will reset automatically when the alarm has cleared Latch accept means that in an alarm or fault condi tion the relay will reset when the Accept Reset button is pressed De energised means that the relay coil is not energised in a non alarm state normally de energised Energised means that the relay coil is energised in a non alarm state normally energised or fail safe Channels 1 to 4 Config Channel 1 Sets the input type for each channel links on the terminal PCB must also be set to the appropriate positions see section 2 8 for details Press the Up Type and Down Values Unused No detector connected buttons to cycle DET 4 20 SRCE 4 20mA current source gas detector through DET 4 20 SINK 4 20mA current sink gas detector configuration FIRE 4 20 SRCE 4 20mA current source flame detector for channels FIRE 4 20 SINK 4 20mA current sink flame detector 2 3 and 4 FIRE CONV Conventional smoke heat or call points ESU ESU sampling device 30 gt CROWCON Gas Detection You Can Trust GasMaster Operation Supervisor menu allows system tests to be performed and configurations to be changed A pass cont word is required to enter this mode see section 3 7 for details Menu Item Values as shown on display Description Channels 1 to 4 Cont Name Detector name e g CH4 for methane O2 for Values 4 character s
50. lied with each detector Ensure at all times the local legislation and codes of practice are complied with Allow detectors to stabilise for at least one hour before commencing calibration Refer to detector manual for more information Gasmaster provides Zero and Calibration Wizards to enable you to carry out calibration easily These are accessed through the Operator Display Panel and Menu System Section Operation provides detailed information on the menu structure and operator buttons Zero adjustment 1 From the normal operating display press the Continue button to enter the menu system 2 Use the Up and Down buttons as necessary to select Supervisor and press Continue gt CROWCON Gas Detection You Can Trust Installation You will be asked to enter a password press Continue The default password is ZZZ upper case use the Up and Down but tons to enter the first character of the password Note Double click the Up or Down button to move to the top or bottom of the alphabet list To enter numbers or lower case characters continue pressing the Up or Down button When you have selected the correct character press Continue the cursor will move to the next character position Continue entering the rest of the pass word When you have finished press the Continue button twice See 3 7 in section Operation for details of entering text strings The Z
51. ly stop sounding when the alarm is cleared and the Accept Reset button is pressed again Non latched means that the sounder will continue to operate when the Accept Reset button is pressed but will silence automatically when the alarm has cleared gt CROWCON Gas Detection You Can Trust 29 Operation GasMaster Supervisor menu allows system tests to be performed and configurations to be changed A pass word is required to enter this mode see section 3 7 for details cont Menu Item Values as shown on display Description AV drive cont Latch accept means that in an alarm condition the sounder will silence when the Accept Reset button is pressed Relay common Alarm L1 common Type Alarm 1 type Values Latched Non latched Latch accept Drive Alarm 1 drive Values De energised Energised Alarm L2 common Type Alarm 2 type Values Latched Non latched Latch accept Drive Alarm 2 drive Values De energised Energised Fault common Type Fault type Values Latched Non latched Drive Fault drive Values De energised Energised Determines the operation of the common alarm and fault relays L1 Level 1 L2 Level 2 Latched means that in an alarm state the relay will stay active when the Accept Reset button is pressed and will only reset when the alarm or fault has cleared and the Accept Reset button is pressed again Non latched means that the re
52. move to the next character position Note The next character will start from he last one selected If you are editing a current text string press Continue to accept a character you wish to keep To delete characters press the Back button all characters will be deleted to the right of the cursor If a text string is deleted in error dou ble click the Back button to exit the menu item The original text string will be retained Continue entering the rest of the text string To finish press the Continue button once more 3 8 In the event of an alarm In the event of an alarm the message display area will display the channel in alarm and the detectors location if this information has been pre set in the configuration the Alarm LED will flash the internal sounder and any dedicated audible visual alarms will activate and any external alarm appa ratus connected through the channel relays will operate If more then one channel goes into alarm the display will cycle through the channels in alarm Channel display area in the Figure 3 3 shows channel 2 CH4 methane in alarm con dition The gas reading will cycle back and forth between the channel type and the gas reading Gas detectors The channel or channels in alarm will display an alarm symbol and flash alternately with the type of 20 GasMaster the detector in the channel display Gasmaster pro vides low and high alarm levels these levels are
53. n addressable loop to a Master controller each Gasmaster must have a dif ferent address Serial comms Describes the required RS 485 communications Values 9600 8 N 1 parameters Gasmaster is factory set to 2 stop bit 9600 8 N 2 Identity Allows a system name to be entered which will be Values 16 character shown on the Gasmaster display when the appropri string ate mode is selected see section 3 4 Use the Up and Down buttons to enter required alpha numeric characters and press Continue to accept Language Language The default display language is English A second Values English UK language may be available depending on system configurable configuration AV drive Beacon type Determines the operation of beacons connected to Latched Non latched Values Sounder type Values Latched Non latched Latch accept the AV1 Drive terminal Latched means that in an alarm state the beacon will continue flashing when the Accept Reset button is pressed and will only stop flashing when the alarm is cleared and the Accept Reset button is pressed again Non latched means that the beacon will continue flashing when the Accept Reset button is pressed but stop automatically when non latching alarms have reset Determines the operation of sounders connected to the AV2 3 Drive terminals Latched means that in an alarm state the sounder will continue to operate when the Accept Reset but ton is pressed and will on
54. nd quantity of goods being returned including any accessories Instrument serial number s Reason for return Obtain a Returns form for identification and trace ability purpose This form may be downloaded from our website crowconsupport com along with a returns label alternatively we can email you a copy Instruments will not be accepted for warranty without a Crowcon Returns Number CRN It is essential that the address label is securely attached to the outer packaging of the returned goods The guarantee will be rendered invalid if the instru ment is found to have been altered modified dis mantled or tampered with The warranty does not cover misuse or abuse of the unit Any warranty on batteries may be rendered invalid if the use of an unauthorized charger is proven Non rechargeable batteries are excluded from this war ranty Warranties on sensors assume normal usage and will be rendered invalid if the sensors have been exposed to excessive concentrations of gas extended periods of exposure to gas or have been exposed to poisons that can damage the sensor such as those emitted by aerosol sprays Warranty Disclaimer Crowcon accept no liability for consequential or indi rect loss or damage howsoever arising including any loss or damage arising out of the use of the instru ment and all liability in respect of any third party is expressly excluded 38 This warranty does not cover the
55. nu Common relay fail Coil fault detected Contact Crowcon 9 10 11 Chan 1 relay fail Channel relay coil fault detected 12 to 19 Contact Crowcon ESU 1 stalled ESU sampling device has stopped 20 to 23 ESU 1 slow ESU sampling device has slowed 24 to 27 Chan 1 over range Detector input signal is over 21 5 mA 28 to 31 nvestigate cause at detector taking necessary precautions as high gas levels may be present Chan 1 under range Detector input signal is under 3 mA 32 to 35 Check detector If the Interpret 2 mA command is set to Warning or Inhibit in the channel configuration his fault message will display when he input signal drops below 1mA 1 denotes the channel number and therefore may read 2 3 or 4 on Gasmaster The fault codes are numbered to relate to a particular channel where appropriate e g fault code 19 means there is a fault on Channel 4 Level 2 alarm relay 22 gt CROWCON Gas Detection You Can Trust GasMaster Press CONTINUE Warnings View Action Supervisor Faults Operation 5 Faults Menu List of faults present List of warnings present Warnings Menu View Relay com stat Alarm L1 common Alarm L2 common Fault common View Relay chan stat Alarm L1 Channels 1 to 4 Alarm L2 Channels 1 to 4 View Configuration System Language AV drive Relay common Channels 1 to 4
56. o change alarm levels When commissioning is complete ensure that the system is left fully functional with no faults present and no channels inhibited gt CROWCON Gas Detection You Can Trust GasMaster i Operation Operation Every Gasmaster system is pre configured by Crowcon please refer to the Specification and Inspection Certificate provided with the product for configuration details This section describes the operation of pre configured units and includes procedures for altering settings 3 1 Gasmaster Operator Panel The Operator Panel allows you to communicate with Gasmaster Use it to monitor the status of all attached field devices determine system settings and configuration of field devices Figure 3 1 shows the Operator Panel and typical display under normal non alarm monitoring conditions Power LED J Alarm LED Fault LED A Warning LED N ri Message and Accept channel remind Reset SS display area ri con OQ 0 0 w hee Figure 3 1 Operator Display Panel and buttons Back Continue o io Chaneli display area 7 Gasmaster Display The User display provides continuous readings for up to 4 field devices plus a display area for user messages and channel number summary Gasmaster 1 provides display for one field device plus the message area Message display are
57. old Stab time Off threshold Fire reset time Relay type m Alarm 1 Relay drive Alarm 2 Indication o 23 Operation GasMaster Warnings menu lists warnings present on the system Menu Item Values Description Codes as shown on display No warnings end of list No warnings are present Warnings Supervisor mode System configurations may be changed 1 Global inhibit All input channels are inhibited 2 Testing audio visual alarm Audible visual outputs will be driven 3 Service calibration due Service or calibration interval has expired 4 Common relay forced Common alarm or fault relays are being forced 5 6 7 to their alarm state Detector 1 stabilising Detector is currently in its stabilisation or reset 8 16 24 32 period see page 30 Detector 1 input low Detector input signal is between 1 and 3 mA 9 17 25 33 Only applies when the Interpret 2 mA command is set to Warning in the channel configuration Detector 1 initiated A 2 mA inhibit signal has been received from a 10 18 26 34 inhibit detector Only applies when the Interpret 2 mA command is set to Inhibit in the channel configuration Chan 1 inhibited Input channel is in an inhibit state 11 19 27 35 Chan 1 input simulated Channel input is being forced in Test mode 12 20 28 36 Chan 1 output forced Channel analogue output is being forced in 13 21 29 37
58. olding the Down but ton will advance backwards through the available groups of characters ZYXW CBA987 210ZYX etc double clicking the Up button will jump forwards to the end of the current group then on to the start of the following one etc ZO9AZ double clicking the Down button will jump backwards to the start of the cur rent group then on to the end of the fol lowing one et AQ OZA gt CROWCON Gas Detection You Can Trust Channel display characters NB The following characters represent those which can be shown on the channel display area to represent detector types The following characters cannot be closely repre sented K M V W X EE 10 MLI w N o z w o o TT E oO m 2 a underscore LUI t 4 blank LO O OA E AUU mM Lo TO OT g ar EEEE 37 Warranty Statement Warranty Statement GasMaster This equipment leaves our factory fully tested and calibrated If within the warranty period of one year from Despatch the equipment is proved to be defec tive by reason of faulty workmanship or material we undertake at our discretion either to repair or replace it free of charge subject to the conditions below Warranty Procedure To facilitate efficient processing of any claim contact our customer support team on 44 0 1235 557711 with the following information Your contact name phone number fax number and email address Description a
59. ome menu levels have sub menus and wizards that guide you through con figuration The lower line displays the menu item value or setting Use the Up and Down buttons to scroll through the menu list press Continue to select the menu item Refer to figure 3 4 on page 21 for an overview of the menu system 18 GasMaster Menu wizards Wizards are an extension of the menu system to guide the user through a process such as calibra tion A wizard menu will consist of selections user prompts and display status conditions during the process The Back button can be used to return to the previous screen or abort the wizard The Down and Up buttons are used to alter a selection The Continue button accepts the current selection and continues to the next step of the wizard Wizards are available for Zero and Calibration menus in Supervisor menu 3 6 Inhibiting channels Inputs can be temporarily inhibited so as not to cause alarms This may be necessary when cali brating detectors or when operations are carried out close to a sensor which may trigger an alarm for example soldering near a smoke detector Input channels can be inhibited individually or all at once The inhibit option is available in the Supervisor Menu see the Menu System Overview on page 20 for details on how to access this func tion When inhibited Gasmaster will m Display the inhibit symbol on the channel display for e
60. ro adjustment and calibration 2 12 2 Testing fire channels 2 12 3 Testing ESU channels gt CROWCON Gas Detection You Can Trust GasMaster 2 1 Before installation Before carrying out any installation work ensure that local regulations and site proce dures are followed Further advice is avail able from Crowcon if required Gasmaster is intended for use in non hazardous areas Gas and fire detectors may be mounted in potentially flammable atmospheres using appro priate barrier devices where necessary Check the equipment to be installed is suitable for the area classification Please refer to instrument installa tion manuals for information on location Crowcon recommends the installation of Gasmaster be carried out by people with experi ence of installing electrical equipment in poten tially hazardous areas 2 2 General This section describes how to get started with a Gasmaster 4 or Gasmaster 7 system that has been pre configured for the detectors supplied Figures 2 1 2 2 and 2 5 show the internal structure of Gasmaster See the Specification and Inspection Certificate provided with your system for full details of its configuration Figure 2 1 shows the internal arrangement of a Gasmaster system The front cover is removed by unscrewing the four screws and carefully disconnecting the two pole sounder connector from the display PCB The front cover should then be placed in a safe location With the
61. ssage when the battery voltage drops to 22 V When the voltage drops to approx imately 20 V the batteries will be automatically disconnected The batteries will only be re con nected when the external power supply is re instated and will take approximately 18 hours to fully re charge Note The internal batteries may not be charged efficiently when Gasmaster is powered from an gt CROWCON Gas Detection You Can Trust GasMaster external dc supply and therefore the back up function may not work if the external supply fails Please contact Crowcon for further advice 2 12 Commissioning Note it is strongly recommended that persons intending to commission a Gasmaster system first read and understand the Operating instructions provided in section Operation When all field devices have been connected and powered up commissioning can commence Gas detectors should be calibrated according to their instructions fire detectors should be tested using appropriate tools Alarms should be simulated and actions noted to ensure that the system operates as intended All warning devices should be checked and inter faces with auxiliary equipment should also be ver ified The test and View menu s are provided for this purpose see page 23 and 26 2 12 1 Zero adjustment and calibration Calibration must be carried out separately on indi vidual gas detectors on Gasmaster Follow calibra tion instructions supp
62. stamped log of up to 300 alarm fault or system intervention activities Time stamped log of up to 300 alarm fault or system intervention activities Panel indication LCD back lit display shows gas level in ppb ppm volume or LEL units and scrolling alphanumeric status indi cation LEDs for Alarm Fault Power and Warning status indication Integral 85 dB sounder LCD back lit display shows gas level in ppb ppm volume or LEL units for all channels and scrolling alphanu meric status indication LEDs for Alarm Fault Power and Warning status indica tion Integral 85 dB sounder Approvals EN 50270 EMC EN 61010 1 Low voltage directive CSA standards C22 2 NO 152 and C22 2 No 142 EN 50270 EMC EN 61010 1 Low voltage directive CSA standards C22 2 NO 152 and C22 2 No 142 TEvent log access requires Gasmaster PC software and communication port Event log data is held in non volatile memory data will be lost in the event of a complete system power failure gt CROWCON Gas Detection You Can Trust 35 Appendix B Spare parts and Accessories GasMaster Appendix B Spare Parts and Accessories Part No Description Comment 01875 12V 1 2Ah battery 2 required E07534 Battery fuse assembly Assembly with fuse fuse holder and loom M05897 Service card Replacement service cards minimum quantit
63. t be used l S devices must be used with a suitable Zener Barrier or Galvanic Isolator when used in a hazardous area m Fire detectors Crowcon recommends cable screened with he use of twisted pair an overall protective sheath that is fireproof for example Pirelli FP200 or similar A 1K8 end of line resistor must be fitted to the conventional smoke or ast detector on each heat detector loop gt CROWCON Gas Detection You Can Trust GasMaster Alternative cabling techniques such as steel con duit may be acceptable provided that appropriate standards are met The minimum acceptable supply voltage meas ured at the detector and the maximum current drawn by that detector is different for each device Please refer to the relevant Installation Operating and Maintenance Instructions provided with each detector to calculate the maximum cable distances allowed for different cable types The maximum cable distance allowed is depend ent upon the installation for example whether Zener Barriers or Galvanic Isolators are required for I S devices or not When calculating maximum cable distances for detectors assume a minimum supply of 19 V and a sense resistance of 98 Q 39 Q for convential fire channels Table 1 Typical cable characteristics c s a Resistance Q per km mm2 Cable Loop 0 5 20 39 0 78 0 1 0 17 18 1 36 2 1 5 15 12 1 24 2 2 5 13 8 0 16 0 Approxim
64. tailed description of the menu system Use figure 3 4 as an overall guide to locate menu items Gasmaster has five standard menus Faults Warnings View Actions and Supervisor Only the Supervisor menu allows you to configure Gasmaster This section contains tables that list the menu items for each menu and the available values Faults menu ists faults present on the system See 3 7 Using the Control Panel in Supervisor Mode on page 17 for instructions on how to alter settings Note The display only shows two lines of infor mation at a time Use the Up and Down buttons to see additional menu items or values Use Continue to select choices and Back to exit menu Menu Item Values as shown on display Description Fault codes No faults end of list No faults are present Faults Measurement system failure Fatal fault contact Crowcon lor2 Battery fail shutting down Input supply has failed and internal 3 battery supply has dropped to 20 volts System will shut down to prevent battery damage Warning Battery low Input supply has failed and internal 4 battery supply has dropped to 22 volts Relay power supply fail Power rail to the relays has failed and 5 relays will no longer operate Contact Crowcon NVM hardware fail Fatal fault contact Crowcon 7 Loaded default settings System has returned to standard 8 configuration settings Re configure using the Supervisor me
65. tain the system according to these instructions could result in failures which could lead to harm to plant and or personnel or even death Details of the requirements for Gasmaster systems are provided in section 4 There are separate appendices for systems specifi cation and spare parts identification Installation Installation Please read this first Before commencing the installation and commi sioning of your Gasmaster system please read through the following information which will guide you through the whole process The installation instructions contained in this sec tion are for a pre configured Gasmaster For instructions on installing and commissioning gas and fire detectors please follow the user manual instructions supplied with the detectors Alternatively contact Crowcon for advice To complete the installation of your Gasmaster system you will need to use the Operator panel and Menu Full instructions can be found in sec tion Ill Operation you are advised be familiarise yourself with the operator buttons on the front panel and the menu structure see page 21 Some configuration steps may require you to enter Supervisor mode Crowcon advises that personnel familiar with installing and commisioning gas and fire detection systems carry out this part If you have purchased a Gasmaster 1 Please follow the instructions in this section but ignore the reference to additional channels If you have purch
66. ted on a six monthly basis Sensors should be changed as advised in the detector manual Note a calibration due warning message may be flagged six months after the last service The warning LED A will light and the message will be shown in the Warnings Menu see page 22 This message can be reset using Gasmaster PC which also allows the period after which the message is displayed to be adjusted Or when the system was last powered up 4 1 Functional Testing Gasmaster allows you to test relays force inputs into alarm state and force analogue outputs to verify the correct operation of the Gasmaster sys em and its interfaces with external equipment These functions are available in the Supervisor menu under Test Please note that using this function will activate he appropriate relays audible visual alarm drives and analogue outputs Ensure necessary precau ions are taken prior to using test functions The options available in Test can be found in sec ion 3 10 page 26 along with a description of each function 4 2 System Inhibit Inputs can be temporarily inhibited so as not to cause alarms This may be necessary when cali brating detectors or when operations are carried out close to a sensor which may trigger an alarm for example soldering near a smoke detector Input channels can be inhibited individually or all at once The inhibit option is available in the Supervisor menu see section 3 6 on pag
67. the Supervisor menu The Inhibit icons will appear on the channel display How to set channel inhibit Channel inhibit can be selected from the Inhibit menu or within the Zero or Calibrate menu Follow the instructions provided above selecting the Channel n where n represents the channel number in place of All Ensure all inhibits are removed when maintenance activities are complete 33 Maintenance 4 3 Detector Calibration Crowcon recommends that you check detectors routinely to ensure correct calibration and operation Gas detectors require recalibration at least every 3 o 6 months Fire detectors should be tested with he same frequency Site procedures may require more frequent testing See section 2 12 1 page 12 for calibration instructions For detailed instructions on the routine functional testing of detectors please refer to the relevant nstallation Operating and Maintenance Instruc ions provided with each detector 4 4 Changing Batteries During routine servicing it is recommended that he power be isolated form Gasmaster temporar ily to ensure that the back up batteries are opera tional Crowcon recommend that batteries are changed every two years and replaced as a pair Replacement batteries should be Yuasa UCEL Y1 2 12 12 v 1 2 Ah C20 lead acid type cells A 10 A fuse is fitted to the batteries for replace ment part number see Spare Parts and Acces sories section
68. tion refer to sensor instructions sup plied with detectors for recommended settling times Note your Gasmaster is supplied pre configured refer to the Specification and Inspection Certificate provided with your system If no chan nels are configured Gasmaster will display the following screen 12 GasMaster No detectors Please configure To configure your system go to page 25 2 11 Battery back up times Gasmaster is fitted with 1 2 Ah batteries to pro vide continued operation in the event of a power loss Examples of typical back up times are pro vided below for a system in a non alarm state relays set as de energised and with the 4 20mA outputs unused system current consumption without detectors is approximately 50mA Gasmaster 1 with a toxic gas detector 2 wire 21 hours Gasmaster 1 with an oxygen detector 2 wire 16 hours Gasmaster 1 with a pellistor flammable gas detector 9 5 hours Gasmaster 1 with an Infrared gas detector 2 5 hours Gasmaster 4 with four toxic gas detectors 2 wire 10 hours Gasmaster 4 with four oxygen detectors 2 wire 4 hours Gasmaster 4 with four pellistor flammable gas detectors 2 hours Gasmaster 4 with four Infrared gas detectors 25 minutes Gasmaster incorporates protection to prevent the internal batteries being damaged by being deeply discharged When operating from internal batter ies Gasmaster will display a Warning battery ow fault me
69. tring oxygen FIRE for smoke heat detectors Location Optional Detector location or tag will be shown Values 32 character string on the message display if an alarm occurs e g Boiler Room Options will Units be shown for Values None E g for an ESU channel 4 20 mA input LEL For flammable channels channels only PPB Very low range toxic gas detectors PPM General toxic gas detectors VOL Oxygen or other high volume gases FIRE Flame or conventional smoke heat detectors Range Options will be shown for 4 20 mA input channels only Values 0 to 9999 9 Zero suppression ZFS Values Enabled Disabled Interpret 2mA Values Fault Warning Inhibit Stab time Values 0 to 120 seconds Fire reset time Values 0 to 30 seconds Alarm L1 1 2 3 4 See submenu below Detector range e g 100 for a flammable detector Applies suppression to the first 3 of scale to prevent small deviations from zero being displayed If the Level 1 alarm for a channel is set below 8 of full scale the level of suppression is reduced Some gas detectors produce a 2 mA signal to indicate a certain state This option determines how Gasmaster interprets a signal between 1 and 3 mA Inhibits the input for preset time after Gasmaster is powered up to prevent false alarms while the sensor is settling Time for which power is removed from smoke heat detectors when the Accept Reset button is pressed Option will
70. tured by Crowcon provide a mV bridge signal rather than a 4 20 mA signal Typical examples are high oper ating temperature detectors and detectors which will be mounted in inaccessible areas An Accessory Box is available to enable these type of detectors to be connected to Gasmaster The Accessory Box contains vert the mV bridge signa 4 20 mA signal that to 4 PCB s which con from each detector to a can be monitored by Gasmaster mV bridge detector cables will be ter minated at the Accessory Box which has a con nector that simply plugs in to Gasmaster Accessory Box details are shown in Appendix B Please contact Crowcon for specific wiring details for Crowcon detectors 2 8 1 Two wire devices Figure 2 6 shows a typical wiring configuration for a 2 wire current sink detector Set the detector type link for the appropriate channel to SINK and the protection link to short 1 amp 2 refer to figure 2 5 gt CROWCON Gas Detection You Can Trust Installation Detector Type Link Protection Link SINK fe 321 CHASSIS EARTH Detector C ea SCR ov SIG PWR agds Figure 2 6 Connections for 2 wire detector Figures 2 7 and 2 8 show typical wiring configu rations for a 2 wire sink S detector with Zener barrier or Galvanic Isolator Set the link for the appropriate channel as shown in each diagram 2 8 2 Three wire devices Fi
71. user configurable and can be set as rising or falling Fire detectors Fire detectors in alarm will display FIRE in the channel display There is only one level of alarm for fire channels Environmental sampling Units ESU ESU sampling devices that have slowed or stopped will display ESU Level 1 means slow level 2 means stopped To mute the sounder Press the Accept Reset button on the opera tor panel or remote Accept Reset switch if fitted The Alarm LED will stop flashing but remain lit The channel display will show the gas reading When alarm conditions have cleared press the Accept Reset button to clear any latched alarms LU e CNT w Figure 3 3 Example system in alarm 3 9 In the event of a fault n the event of a fault the fault LED will illuminate and the internal sounder will activate The mes sage area will display FAULT and fault ID num ber The fault description will appear in the lower portion of the message area messages longer then 16 characters will be scrolled across the screen Pressing Accept Reset will clear the fault message from the display To display a list of all faults pres ent use the faults menu A list of faults can be found in the menu system overview on page 20 3 10 System Configuration Your Gasmaster system is supplied pre config ured however you may wish to configure relay gt CROWCON Gas Detection You Can Trust GasMaster and al
72. y 10 M07624 Installation Operation and maintenance manual S011790 2 Display PCB For all Gasmaster models S011713 2 Gasmaster 4 terminal PCB No links supplied use links from old PCB S011714 2 Gasmaster 1 terminal PCB No links supplied use links from old PCB E07109 Insulated Jumper links Spare links for PCB s minimum order quantity 10 S011746 Power supply assembly Complete with wiring looms S011723 Sounder assembly Complete with wiring loom M04683 Sounder seal M05891 Gasmaster 4 display label For front cover M05906 Gasmaster 1 display label For front cover M05892 Domed Crowcon label For front cover of all models M05893 Domed Gasmaster label For front cover of Gasmaster 1 and 4 C01929 Communications Kit Includes Gasmaster PC software connection lead and RS485 232 converter E07635 Communications port 3 pin connector for fitment to Gasmaster to enable interface with the Communications Kit Comes complete with wiring loom for connection to the RS 485 terminals c01919 Accessory Enclosure For connecting one mV bridge type flammable gas detector to Gasmaster 1 or 4 Comes with the connector for Gasmaster C01920 Accessory Enclosure For connecting two mV bridge type flammable gas detectors to Gasmaster 4 Comes with the connector for Gasmaster C01921 Accessory Enclosure For connecting three mV bridge type flammable gas detectors to Gasmaster 4 Comes with the connector for Gasmaster C01922 Accessory Enclosure For connecting four m
73. y returns to Control Panel menu Display contrast Display Values Menu contrast Channel contrast Alters the message display area contrast Use the Up and Down buttons to adjust the contrast of the LCD 26 gt CROWCON Gas Detection You Can Trust GasMaster Operation Supervisor menu allows system tests to be performed and configurations to be changed A pass word is required to enter this mode see section 3 7 for details Menu Item Values as shown on display Description Inhibit All Inhibits all input channels when selected Values Inhibit off Only whilst in Supervisor mode used for Inhibit on calibration and test Channels 1 2 3 4 Allows individual channels to be inhibited Values Inhibit off NB Inhibit persists on exit from Supervisor mode Inhibit on Zero Zero Wizard Select channel Use Down button to select the required channel to Values 1 name zero then follow wizard instructions 2 name 3 name 4 name Select channel Inhibit Inhibit option will not be displayed if channels Values Inhibit on have already been set to inhibit using the menu Inhibit off shown above User confirmation Reminds the user to check that the detector has been Only continue if in clean air zeroed and is currently not seeing gas Result Values Pass Channel has correctly zeroed Fail Input signal was out of acceptable range re zero the detector and check that its output current is 4 m

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