4
7890 Series GC Site Preparation Checklist
Issued: 09-Dec-2015, Revision: 1.8
Copyright
2013
Agilent Technologies
Page 4 of 15
22B
Heat Dissipation
Your facilities manager may wish to know the amount of heat that the system generates in order to
establish its contribution to the overall room ventilation requirements.
The following table may help you calculate the additional BTU’s of heat dissipation from this new
equipment. Maximums represent the heat given off when heated zones are set for maximum
temperatures.
Refer to the "Heat Dissipation" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" for
more detail.
Oven type
Heat dissipation
Standard oven ramp
7681 BTU / hour maximum
Fast oven ramp (options 002 and 003)
10,071 BTU / hour maximum
10B
Venting the Oven - Oven Heat Deflector Option 306 or Part Number G1530-80650
Below is a picture that shows the back view of an installed 7890 GC - with the Oven Heat Deflector
installed. The exhaust duct is 10 cm (4 inches) in diameter and adds 14 cm (5.5 inches) to the back of the
GC.
The connecting duct should provide unrestricted flow for the oven air and be as short and straight as
possible.
With the exhaust deflector installed the exhaust is about 65 CFM (ft3/min /1.840 m3/min). Without the
deflector, the exhaust rate is about 99 CFM (ft3/min /2.8 m3/min).
Refer to the "Exhaust Venting" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" for
more detail.
