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Solid State Sensor 

Summary of Contents for LBW-420-1-SS

Page 1: ... NS SO OR R O ON NL LY Y L LB BW W 4 42 20 0 3 3 S SS S 1 11 15 5 V VA AC C p po ow we er re ed d L LB BW W 4 42 20 0 1 1 S SS S 2 24 4 V VD DC C p po ow we er re ed d L LB BW W 4 42 20 0 2 2 S SS S 2 23 30 0 V VA AC C p po ow we er re ed d Solid State Sensor ...

Page 2: ......

Page 3: ... R L LB BW W 4 42 20 0 12 P PO OW WE ER R L LB BW W 4 42 20 0 1 1 12 J JU UM MP PE ER R J J3 3 A AM MM MO ON NI IA A S SI IG GN NA AL L L LB BW W 4 42 20 0 1 1 O ON NL LY Y 12 J JU UM MP PE ER RS S R RE EQ QU UI IR RE ED D 13 R RE EL LA AY YS S 13 R RE EL LA AY Y S ST TA AT TU US S L LE ED DS S 13 E EX XT TE ER RN NA AL L C CO ON NN NE EC CT TI IO ON NS S 14 4 4 2 20 0 M MA A A AN NA AL LO OG G O ...

Page 4: ...ature Setpoint Range 50 F to 110 F Display 0 8 7 segment LED 4 digit Controls Service mode jumper Enter Up and Down pushbuttons Rotary selector switch Jumper Ammonia Sensor Metal oxide semiconductor 833 mW integral heater Alumina ceramic base 100 mesh SUS 316 double gauge flame arrestor Relays Alarm pre alarm and auxiliary see pairing aux relay Form C SPDT normally open normally closed energized i...

Page 5: ...is s s sp pe ec ci if fi ic c t to o a an n L LB BW W 4 42 20 0 w wi it th h a a S So ol li id d S St ta at te e S Se en ns so or r i in ns st ta al ll le ed d i it t i is s p po os ss si ib bl le e t to o d do o a a f fi ie el ld d c co on nv ve er rs si io on n t to o a an n E El le ec ct tr ro oc ch he em mi ic ca al l S Se en ns so or r C Co on nt ta ac ct t C Co oo ol l A Ai ir r i in nc co o...

Page 6: ...aintenance Removing the ammonia or temperature sensor Furthermore be sure of the following before placing the detector in normal operating mode The ammonia concentration reading is below the Low alarm set point A nuisance alarm will also occur if the external temperature sensor installation status is programmed to F In installed and an external temperature sensor is not installed I IN NT TR RO OD ...

Page 7: ... these additional standard features Programmable Hi Alarm and Low Alarm set points Selectable PPM reading start 0PPM 10PPM or 25PPM The detector hardware and the connected system response can be tested without exposing the sensor to ammonia Selectable Service Mode timeout 4 20 mA analog output signals for ammonia which can communicate directly with computer systems such as PLC s Normally open norm...

Page 8: ...ct Cool Air Incorporated technical support for more detailed information or for purchasing any of these options P PA AR RT TS S D DE ES SC CR RI IP PT TI IO ON N F Fr ro on nt t P Pa an ne el l D Di is sp pl la ay y The front panel display is comprised of a digital display and a series of labeled indicating LED s The seven segment four digit display indicates a variety of information such as ammon...

Page 9: ... base that is resistant to severe environments F Fr ro on nt t P Pa an ne el l M Mo ou un nt te ed d C Ci ir rc cu ui it t B Bo oa ar rd d The front panel mounted circuit board contains the controls necessary for programming and operating the detector Each control is described in detail below When the detector enclosure is Four digit seven segment display In normal operating mode this will display...

Page 10: ...jumper is in the ON position the detector continues to function as usual however the alarm pre alarm and auxiliary relays are disabled as well as the 4 to 20mA signal is set to 4ma 0PPM This allows the detector to be serviced tested and calibrated without tripping the alarm relays and setting off nuisance alarms When the detector is in the service mode the display will alternate between the sensor...

Page 11: ...uring calibration of the detector R Ro ot ta ar ry y S Se el le ec ct to or r S Sw wi it tc ch h The rotary selector switch labeled MENU SELECT on the front panel mounted circuit board is used for performing functions such as Setting the information displayed on the front panel Programming set points Displaying system information Calibrating the detector When the detector is in operation this swit...

Page 12: ...offset 8 Factory Use 9 Note If the rotary selector switch is left in a position other than 0 or 1 for more than 5 minutes without pressing an UP or DOWN button the digital display will begin to display ammonia concentration If this happens return the selector switch to the 0 position then set the switch to the desired position For example if you set the rotary selector switch to position 3 to prog...

Page 13: ...he installed position for more than 5 minutes without pressing an UP or DOWN button the digital display will begin to display ammonia concentration If this happens remove the SET1 jumper and return the selector switch to the 0 position then re install the SET1 jumper and set the switch to the desired position E En nc cl lo os su ur re e M Mo ou un nt te ed d C Ci ir rc cu ui it t B Bo oa ar rd d T...

Page 14: ...s Power is connected to terminal block J2 J Ju um mp pe er r J J3 3 A Am mm mo on ni ia a s si ig gn na al l L LB BW W 4 42 20 0 1 1 o on nl ly y Jumper J3 ammonia signal configures the LBW 420 1 to use either an external power supply for the Ammonia 4 20 mA circuit or to use an on board 18 to 30 volt DC supply for the 4 20 mA circuits With the jumper in the leftmost position connecting pins 2 to ...

Page 15: ...s as selected see pairing the Aux Relay The factory default is for the auxiliary relay to operate only when there is an Err error with the detector In the normal operating mode the relays are energized in a normally open state If a loss of power to the detector occurs the relays will de energize and the alarms if connected will sound R Re el la ay y S St ta at tu us s L LE ED Ds s Each relay has a...

Page 16: ...te with external devices such as computers PLCs and digital displays The output conforms to ISA S50 01 ratings Type 2L and Type 2H two wire The ammonia level detector output current TB2 Sensor 4 20mA terminals on lower left of Enclosure Mounted Circuit Board is proportional to ammonia PPM with the proportionality constant dependent on the range The PPM value can be determined using one of the foll...

Page 17: ...s the detector a 24 VDC power supply and the receiving device It is recommended that a 24 VDC low noise power supply be used for this application although power supplies providing a minimum of 18 VDC to a maximum 30 VDC can be used The voltage drop across the detector and the receiver together must not exceed the power supply voltage This circuit is shown in Figure 1 below Figure 1 ...

Page 18: ...h connects pins 2 3 power for the 4 20 mA circuit is provided by the LBW 420 1 This circuit is shown below The power supply must supply all power for the LBW 420 1 plus the 4 20 mA circuit Refer to the specifications page for the power requirements for the LBW 420 1 The voltage drop across the detector and the receiver together must not exceed the power supply voltage This circuit is shown in figu...

Page 19: ... specifications page for the power requirements for the LBW 420 1 The power for the 4 20 mA circuit is supplied by the 24 VDC power supply 2 The 4 20 mA circuit is a simple series circuit that includes the LBW detector a power supply and the receiving device It is recommended that a 24 VDC low noise power supply be used for this application although power supplies providing a minimum of 10 VDC to ...

Page 20: ...s that accompany the mounting feet for mounting the detector enclosure Be sure the detector is visible and easily accessible Avoid locating the detector where it might be damaged When power is applied to the detector it may go into alarm status and the display will show an unusually large ammonia concentration This is normal When the sensor warms to normal operating temperature usually about a min...

Page 21: ...ng the display mode 6 Be sure the displayed ammonia concentration is below the programmed Low alarm set point Return the detector to normal operating mode by moving the service jumper to the OFF position 7 Test the detector to ensure it is operating correctly but allow at least 8 hours after power is first applied to the detector before testing See the section on testing the detector P PR RO OG GR...

Page 22: ...ove 24PPM Once you have selected the desired display property you must hold the ENTER button for two seconds before removing the SET 1 jumper or changing the rotary switch P Pr ro og gr ra am mm mi in ng g t th he e A Am mm mo on ni ia a A Al la ar rm m a an nd d L Lo ow w A Al la ar rm m S Se et t P Po oi in nt ts s The Low alarm set point can be set from 25PPM to 1000PPM in 5PPM increments The L...

Page 23: ...al temperature sensor is installed Programming the installation status requires the use of the jumper To program the external temperature sensor installation status follow these steps 1 Open the detector enclosure and move the service jumper to the ON position 2 Install the jumper on the jumper pins labeled SET1 located below the rotary switch on the front panel mounted circuit board 3 Set the rot...

Page 24: ...ired range 5 Press and hold the ENTER button for at least 2 seconds The new range is now programmed 6 Remove the jumper and return the rotary selector switch to the desired position 7 Move the service jumper to the OFF position and close the detector enclosure 8 S Se et tt ti in ng g t th he e S Se er rv vi ic ce e M Mo od de e T Ti im me eo ou ut t If the service jumper is not returned to off you...

Page 25: ...display In addition you can select to have the auxiliary relay paired activate at the same time as either the Hi Alarm alarm relay or the Low Alarm pre alarm relay With the SET jumper on and the Rotary Switch in position 6 you can use the up and down buttons to select either AU Auxiliary relay is not paired Activates on errors only AUAL Auxiliary relay is paired with the Hi Alarm alarm relay AUPR ...

Page 26: ...isplay board LBW 420 CDB Err4 Ammonia sensor temperature sensor fault Sensor Defective NH3 S 420 Sensor not plugged in all the way Orange or Blue wire not terminated correctly on control board Defective Sensor Socket Assembly LBW 420 SSH Defective Control display board LBW 420 CDB M Me es ss sa ag ge e C Co od de es s I If f t th he e s se er rv vi ic ce e j ju um mp pe er r i is s i in n t th he ...

Page 27: ...m set point minus 5 and the pre alarm and optional Auxiliary relays will automatically reset when the ammonia concentration falls below the Low alarm set point minus 5 T TE ES ST T A AN ND D C CA AL LI IB BR RA AT TI IO ON N Be sure to follow all codes and company procedures that pertain to the maintenance repair testing and calibration of all safety equipment including this detector At a minimum ...

Page 28: ... to the HI Alarm Set Point The 4 to 20mA output current will indicate the simulated ammonia concentration according to the 4 to 20mA range selected To test the detectors response to ammonia for best results allow at least 20 minutes after first applying power to the detector 1 Open the detector enclosure and move the service jumper to the ON position if needed This step deactivates the Per Alarm A...

Page 29: ...ications if alarming is required leave the service jumper in the OFF position 2 Install the jumper on the jumper pins labeled SET1 located below the rotary selector switch on the front panel mounted circuit board 3 Set the rotary selector switch to position 9 4 Take a sample bottle of known ammonia concentration and wipe clean the inside and outside surface of its neck Hold the bottle over the sen...

Page 30: ... AL L S SU UP PP PO OR RT T For technical support contact Cool Air Incorporated using any of these methods Contact Sales Representative Phone 763 205 0844 USA Fax 763 432 9295 USA E mail info coolairinc com Web site www coolairinc com Address Cool Air Incorporated 1544 134th Ave NE Ham Lake MN 55304 USA Testing and maintenance supplies 0 to 1000 PPM Solid State Sensor P N NH3 S RPL Ammonia 100 PPM...

Page 31: ...t shall be returned freight prepaid and repaired or replaced if it is determined by CAI that the part s failed due to defective materials or workmanship The repair or replacement of any such defective part shall be CAI s sole and exclusive responsibility under this limited warranty 2 Inclusions A As of September 2 2014 the defined Product that is covered by this thirty six 36 month limited warrant...

Page 32: ...s such as back up batteries or ammonia test bottles 4 Warranty Limitation Inclusions Exclusions Cool Air Incorporated shall have no further obligation under this limited warranty All warranty obligations of Cool Air Incorporated are extinguishable if the Product has been subject to abuse misuse negligence or damage by accident or abnormal conditions of operation handling or use by the Purchaser or...

Page 33: ...L NOT EXCEED THE AMOUNT OF THE PURCHASE PRICE PAID BY THE PURCHASER FOR THE PRODUCT AND UNDER NO CIRCUMSTANCES SHALL COOL AIR INCORPORATED BE LIABLE FOR SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES THE PRICE STATED FOR THE PRODUCT IS A CONSIDERATION LIMITING COOL AIR INCORPORATEDS LIABILITY NO ACTION REGARDLESS OF FORM ARISING OUT OF THE TRANSACTIONS UNDER THIS WARRANTY MAY BE BROUGHT BY THE PURCHASE...

Page 34: ...Page 32 Rev 10 0 8 1 2018 Copyright 2018 by Cool Air Incorporated All rights reserved This page intentionally left blank ...

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