PerkinElmer PINAACLE 900 Series, Customer Hardware And Service Manual

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43
Fume Ventilation
for installation (Part No. 09936775) are provided with the Blower and Vent
assembly. The blower provided in the
PerkinElmer accessory kit requires a line voltage of 115 V or 230 V.
Additional recommendations on the venting system include:
• Make sure the duct casing is installed using fireproof construction. Route
ducts away from sprinkler heads.
• Locate the discharge outlet as close to the blower as possible. All joints on
the discharge side should be airtight, especially if toxic vapors are being
carried.
• Equip the outlet end of the system with a back draft damper and take the
necessary precautions to keep the exhaust outlet away from open windows
or inlet vents and to extend it above the roof of the building for proper
dispersal of the exhaust.
• Equip the exhaust end of the system with an exhaust stack to improve the
overall efficiency of the system.
• Make sure the length of the duct that enters into the blower is a straight
length at least ten times the duct diameter. An elbow entrance into the
blower inlet causes a loss in efficiency.
• Design local exhaust ventilation systems individually for each specific AA
instrument. Also, the opening of the exhaust vent should be large enough
to cover the graphite furnace or flame area completely.
• Provide make-up air in the same quantity as is exhausted by the system. An
"airtight" lab will cause an efficiency loss in the exhaust system.
• Ensure that the system is drawing properly by releasing smoke into the
mouth of the collector hood (vent). A synthetic "smoke" can be generated
by placing open bottles of hydrochloric acid and ammonium hydroxide in
proximity under the hood.
• Equip the blower with a pilot light located near the instrument to indicate
to the operator when the blower is on.