Lincoln Electric VIKING 3250D Operator's Manual page 12

BREATHING TUBE INSTALLATION
WARNING
Breathing tube safety
• Be sure breathing tube is properly installed or non-
filtered air may enter the helmet.
• Be sure o-ring is properly installed on tube connector and
there are no visible signs of cuts or tears on o-ring.
Replace o-ring if damaged.
• Do not use respirator if o-ring is missing.
Connecting breathing tube to blower
Align pins of tube connector with channels in blower unit receptacle.
Insert connector as far as it will go into blower unit and the turn
connector 1/8 of a turn clockwise to secure this end of breathing
tube.
VIKING PAPR FGS 3250D WELDING HELMET
FIGURE 4
Breathing
Tube
Connecting breathing tube to helmet
Align pins of tube connector with channels in helmet receptacle.
Insert connector as far as it will go into helmet receptacle and the
turn connector 1/8 of a turn clockwise to secure this end of breathing
tube. If tube is twisted, disconnect one end of breathing tube.
Untwist tube and re-attach.
To remove breathing tube turn connector 1/8 of a turn counter
clockwise and pull connector out to release from helmet or blower
unit.
8
Receptacle
O-Ring
Breathing
Tube Connector