Exhaust Venting - Agilent Technologies ALS Handbuch

Exhaust Venting

Hot air (up to 350 °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,
WA R N I N G
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.
An optional oven exhaust deflector (vertical (G2630-60710) or horizontal
(G2628-60800)) is available and may improve oven cooling by deflecting the
exhaust air away from the instrument.
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, these exhausts 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).
Vent the GC/MS system externally to the building via an ambient-pressure
vent system, within 460 cm (15 ft) of both the GC split vent and GC/MS
foreline pump, or vent to a fume hood.
Note that an exhaust vent system is not part of the building environmental
control system, which recirculates air.
Exhaust venting must comply with all local environmental and safety codes.
Contact your Environmental Health & Safety (EHS) specialist.
GC, GC/MS, and ALS Site Preparation Guide
6850 Series GC Site Preparation
79