Cool Air LBW-420-1-EC Manual Download | Manualshive

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Rev. 11-5 12/15/2020

Copyright © 2020 by Cool Air Incorporated. All rights reserved.

Wiring Diagram: LBW-420-1 with (1) – 24 VDC Power

Supply

For this configuration, with the jumper J3 in the leftmost position

(which 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 figure 2 below:

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Summary of Contents for LBW-420-1-EC

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

Page 2: ......

Page 3: ...IA A S SI IG GN NA AL L L LB BW W 4 42 20 0 1 1 O ON NL LY Y 11 R RE EL LA AY YS S 12 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 13 4 4 2 20 0 M MA A A AN NA AL LO OG G O OU UT TP PU UT T 13 I IN NS ST TA AL LL LA AT TI IO ON N A AN ND D S SE ET TU UP P 17 P PR RO OG GR RA AM MM MI IN NG G A AN ND D O OP PE ER RA AT TI IO ON N 18 S...

Page 4: ...ry selector switch Jumper Ammonia Sensor Electrochemical High selectivity to NH3 Small influence by H2S Excellent durability to NH3 exposure Linear output Long life Stable baseline Unique leak proof structure Relays Alarm pre alarm and auxiliary see pairing aux relay Form C SPDT fail safe Contact rating 5A 120 VAC or 24 VDC Outputs Contacts for alarm pre alarm and auxiliary relays and external tem...

Page 5: ...p pe ec ci if fi ic c t to o a an nL LB BW W 4 42 20 0 w wi it th h 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 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 a S So ol li id d S St ta at te e 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 or rp po o...

Page 6: ...ons of 0 to 500 parts per million PPM electrochemical sensor or 0 to 1000 parts per million PPM solid state sensor The Cool Air Incorporated LBW 420 2 is a 230VAC powered version of the LBW 420 ammonia leak detector 115VAC powered detector The LBW 420 2 requires an AC supply voltage between 200 and 240 volts AC The Cool Air Incorporated LBW 420 1 is a DC powered version of the LBW 420 ammonia leak...

Page 7: ...sors and additional alarm systems This relay can be set to operate as an indication of an error only error and active with low alarm relay or error and active with alarm relay In addition to the standard features the LBW 420 and LBW 420 1 can be equipped with these options A remote ammonia sensor with cable allowing the sensor to be located a maximum of 500 feet away from the detector An external ...

Page 8: ...tion of the rotary selector switch Ammonia concentration is displayed in parts per million and temperature is displayed in degrees Fahrenheit F The LED s provide an indication of ammonia concentration and alarm status at a glance For information on how the display indicates ammonia concentrations see the sections on ammonia leak indication Four digit seven segment display In normal operating mode ...

Page 9: ...re compensated and is protected by an inexpensive pre filter that is easy to replace 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 open this circuit board is on the lef...

Page 10: ... a reminder to set the jumper back to off when service is done If the service jumper is not returned to off it will automatically return to an as off state after a selected amount of time The factory default is 15 minutes See Setting the Service Mode Timeout T Th he e E EN NT TE ER R U UP P a an nd d D DO OW WN N P Pu us sh hb bu ut tt to on ns s The UP and DOWN buttons are used for setting the di...

Page 11: ...set point 3 Program the ammonia Low alarm set point 4 Display ammonia concentration in PPM See Section Testing the Detector 5 Factory Use 6 Factory Use 7 Electrochemical Sensor Zero 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 concentr...

Page 12: ...ia sensor 4 20mA Range 3 Set the Service Mode Time out 4 Set the status of the External Temperature sensor installed or not installed 5 Sets the AUX relay pairing 6 Set the Display start value 0PPM 10PPM or 25PPM 7 Select for Solid State Sensor or Electrochemical Sensor 8 Calibrate the detector 9 Note If the SET1 jumper is left in the installed position for more than 5 minutes without pressing an ...

Page 13: ...in detail below NOTE This detector does not support a 4 to 20mA output for the temperature sensor P Po ow we er r L LB BW W 4 42 20 0 Power for the LBW 420 must be a nominal 115 Volt AC circuit Power for the LBW 420 2 must be a nominal 230 Volt AC circuit Power is connected to terminal block J2 A safety ground terminal is also provided on terminal block J2 P Po ow we er r L LB BW W 4 42 20 0 1 1 P...

Page 14: ...J Ju um mp pe er rs s R Re eq qu ui ir re ed d Jumpers J3 must be installed in either position If the jumper is removed the 4 20 mA circuit s will not function R Re el la ay ys s The detector has three miniature printed circuit board relays the alarm pre alarm early warning and the auxiliary relays The auxiliary relay operates as selected see pairing the Aux Relay The factory default is for the au...

Page 15: ...20 1 DC Power 4 4 2 20 0 m mA A A An na al lo og g O Ou ut tp pu ut ts s The detector has a 4 20 mA analog output that allows it to communicate 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 ...

Page 16: ...PPM 1000 PPM range Wiring Diagram LBW 420 For the LBW 420 the 4 20 mA output is a simple series circuit that includes 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 receive...

Page 17: ...ch 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 fig...

Page 18: ...e 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 19: ...ns 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 mi...

Page 20: ...ogram Set the detector to the desired operating display mode typically 0 or 1 See the next section on setting 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 20 minutes aft...

Page 21: ...an use the up and down buttons to select either d0 Display shows all readings above 0PPM d10 Display shows all readings above 9PPM d25 Display shows all readings above 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 ...

Page 22: ... status can be programmed to F In installed or F not installed depending on whether an external 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 labele...

Page 23: ...r500 r800 or r1E3 1000 PPM range 4 Press the UP or DOWN button until the display indicates the desired 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 S Se et tt ti in ng g t th he e S Se er r...

Page 24: ... ng g The auxiliary relay will always activate when there is an error Err on the 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 ...

Page 25: ... is s i in n t th he e o on n p po os si it ti io on n t th he e d di is sp pl la ay y m me es ss sa ag ge e s sh ho ow ws s Message Code Description SEr Service jumper on T Th hi is s i is s a a r re em mi in nd de er r t to o m mo ov ve e t th he e s se er rv vi ic ce e j ju um mp pe er r t to o o of ff f s so o t th he e u un ni it t i is s i in n t th he e n no or rm ma al l o op pe er ra at t...

Page 26: ...Hi alarm 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 m...

Page 27: ... 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 Alarm and Auxiliary relays so tha...

Page 28: ...he ON position if needed This step deactivates the pre alarm Alarm and Auxiliary relays so that any attached strobe lights horns and or monitoring systems are not activated In some applications 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 ...

Page 29: ...on the front panel mounted circuit board 13 Set the rotary selector switch to position 9 14 Apply span gas certified span gas at 0 3 L min span gas must be in air not nitrogen or other carrier until a stable ammonia concentration reading is displayed It might take several minutes for the reading to stabilize this should be at a maximum 2 minutes 15 Press the UP or DOWN button until the display ind...

Page 30: ...and maintenance supplies Calibration and test kit P N CAI CAL KIT Cal Adaptor for Electrochemical Sensor P N EC CAL ADPT 0 to 500 PPM Electrochemical Sensor P N 277 202 420 Ammonia 100 PPM Calibration Gas Balance Air in a 34 Liter Aluminum Cylinder Connection Type C 10 P N TG 100 34L Ammonia 250 PPM Calibration Gas Balance Air in a 34 Liter Aluminum Cylinder Connection Type C 10 P N TG 250 34L Amm...

Page 31: ...roduct 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 wa...

Page 32: ...ms 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 o...

Page 33: ...LL 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 PURCHAS...

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Page 36: ...Ha am m L La ak ke e M MN N 5 55 53 30 04 4 U US SA A P Ph ho on ne e 7 76 63 3 2 20 05 5 0 08 84 44 4 F Fa ax x 7 76 63 3 4 43 32 2 9 92 29 95 5 i in nf fo o c co oo ol la ai ir ri in nc c c co om m w ww ww w c co oo ol la ai ir ri in nc c c co om m ...

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