Mack MRU - Methane Detector;Alarm System

SafetyInformation7
METHANEDETECTOR/ALARMSYSTEM
Note:Thefollowinginformationappliestoequipmentlocatedonthevehicle
only.Separatemethanedetector/alarmsystemsshouldbeinstalledinfacilitiesthat
frequentlyhousenaturalgasvehicles.Inaddition,hand-heldmethanedetector/alarm
devicesshouldbeusedwhenworkingonnaturalgasvehicleswithnon-functioning
ordisconnectedmethanedetector/alarmsystemsandwherenoauxiliarymethane
detector/alarmsystemisinstalled.
Note:Consultyourlocalrecodeand/or
reinspectortomakesuethatadequate
detectionandpreventionmeasuresarein
place.
Themethanevapordetectionsystemutilizestwosensorstoidentifymethanevapors;
onelocatedinthecabcompartmentandonelocatedintheenginecompartmentof
thevehicle.Thesystemoperateswithbothavisualandanaudiblealarmtowarn
theoperatorofpotentialdanger.Thealarmsaretriggeredattracelevels(20%LEL
[LowerExplosiveLimit])andatsignicantlevels(50%LEL)ofvaporconcentration.
Thesystemandsensoroperationisconstantlymonitored.Aninternalrelaycontrols
twoindicatorlamps(1greenand1red)thatcanbeseenthroughthewindshield.The
greenlampwillgooutandtheredlampwillilluminate15secondsafterasignicant
levelofmethanehasbeendetected.Themethanedetectoralsohasapassto-test
buttonthatcanbeusedtotesttheindicatorlampsandtheaudiblealarm.