Despatch Stackable LCC/LCD-4 - Manual (Page 15)

Stackable LCC/LCD Oven Owner’s Manual T HEORY OF O PERATION
Version 1.1 15
Copyright © 2012 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
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
7 material to prevent accidental exposure during
maintenance and troubleshooting.
The cooling fan is controlled on/off by an event relay in
the Protocol 3 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.
The oven has a type 304-2B stainless steel interior and a type 304-#4 stainless steel interior. All
interior seams are continuously welded on the insulation side. This protects the work chamber
from contaminated air and permits chamber washing without damaging the insulation. Interior
7
Trademark of SABIC Innovative Plastics.
Figure 1. Stackable LCC/LCD Series Oven.