Despatch Stackable LCC/LCD - Manual (Page 15)

Stackable LCC/LCD Oven Owner’s Manual T HEORY OF O PERATION
Version 26 15
Copyright © 2010 by Despatch Industries.
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3. Theory of Operation
3.1. The Stackable LCC/LCD Series Oven
The Stackable LCC/LCD Series Oven (Figure 1)
offers HEPA (High Efficiency Particulate Air)
filtration for processes where minimized
contamination is essential. The removable HEPA filter
is designed to provide a constant flow of 99.97% clean
air to the product being heated. The HEPA filter with
silicone seal provides 99.99% filtration.
The oven operator interface is located on the hinged
control panel at the front of the oven (Figure 1). Power
components are located on the equipment panel,
behind the hinged control panel, for easy access
(Figure 8). Electrical components are either touch-
proof or are shielded with Lexan
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material to prevent
accidental exposure during maintenance and
troubleshooting.
The cooling fan is controlled on/off by an event relay
in the Protocol Plus Control. The cooling fan is used
for rapid cool-down at the end of the process cycle, or
to maintain low temperature setpoints during process
cycle. It may also be turned on at the start of a process cycle to assure that starting
temperature is less than 70°C.
The nitrogen models have stainless steel water coil which permits rapid cool down and
lower temperature operation. The nitrogen oven comes with an adjustable flowmeter a for
adjusting purge rate, and needle valve for setting maintain rate, separate solenoid valves
for purge and maintain operation and a pressure relief exhaust port. An exhaust fan which
powers on whenever the oven is running maintains consistent chamber pressure control
with varied exhaust stack conditions.
Danger!
Use care when working with nitrogen. Nitrogen presents an
asphyxiation hazard. Handle nitrogen according the safe
handling procedures listed in the material safety data sheet.
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Trademark of SABIC Innovative Plastics.
Figure 1. Stackable LCC/LCD Series Oven.