
ii
Note: Calls attention to supplemental information.
Warning Statements
Thefollowingsaf etywarningsappearinthetextwh erethereisdan gertooper a tingandmaint e‐
nancepersonnel,andarerepeatedhereforemphasis.
Onpages2and7.
Onpages5.
Onpages5.
Onpages5,11,and16 .
Onpages11.
Onpages11,14,and16.
Thissymbolindicatesthat
ashockhazardexistsiftheprecautionsinthe
instruc tio nmanualarenotfollowed.
Thecautionsymbolappearsontheequipmen tindicatingthereisimport‐
antinformationintheinstructionmanualregardingthatparticulararea.
Thissymbolindi c atesthattheunitradiatesheatandshouldnotbetouched
whilehot.
WARNING
Referto
thesuppliedloadmanualforload‐specificwarningsandcautions.
WARNING
Allventplugsmustbeinstalledontheloadatalltimeswhentheuni tisoperatingor
cooling.Failuretodosocouldresultin anexplosionorsevereburns.
WARNING
Donotattempttoliftthecartbythe
handle.
WARNING
Nev er attempttoconnectordisc onnectRFequipment fromthetransmissi onlinewhileRF
poweris beingapplied.LeakingRFenergyisapot entialhealthhaz a r d.
WARNING
TheBird4421containsnouser‐serviceableparts.
Donotremoveitscover.
WARNING
Toavoidpersonalinjur y,disconnectthepowercordfromtheAC
linebeforeperforming
anymaintenance,includingfusereplacement.