Exhaust Venting - Agilent Technologies 7820A GC Site Preparation Manual

Exhaust Venting

WA R N I N G
7820A GC Site Preparation Guide
Hot air (up to 425 °C) from the oven exits through a vent in the
rear. Allow at least 25 cm (10 in) clearance behind the
instrument to dissipate this air.
Do not place temperature-sensitive items (for example, gas
cylinders, chemicals, regulators, and plastic tubing) in the path of
the heated exhaust. These items will be damaged and plastic
tubing will melt. Be careful when working behind the instrument
during cool-down cycles to avoid burns from the hot exhaust.
During normal operation of the GC with many detectors and
inlets, some of the carrier gas and sample vents outside the
instrument through the split vent, septum purge vent, and
detector exhaust. If any sample components are toxic or
noxious, or if hydrogen is used as the carrier gas, the exhaust
must be vented to a fume hood. Place the GC in the hood or
attach a large diameter venting tube to the outlet for proper
ventilation.
To further prevent contamination from noxious gases, attach a
chemical trap to the vent(s).
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