Despatch LCC/LCD2-14-4 Oven Series with Protocol 3 - Manual (Page 16)

T HEORY OF O PERATION LCC/LCD2-14 Series Oven Owner’s Manual
16 Version 1
Copyright © 2013 by Despatch Industries.
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3.
Theory of Operation
3.1. The LCC/LCD2-14 Series Oven
The LCC/LCD2-14 Series oven (Figure 3), a class 100
clean room oven, offers HEPA (High Efficiency
Particulate Air) filtration for processes where
minimized contamination is essential. Forced
convected airflow provides rapid uniform distribution
of heat. 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. A magnehelic
differential pressure gauge monitors pressure drop
across the HEPA filter.
The oven operator interface is located on the hinged
control panel at the front of the oven (Figure 3). Power
components, fuse blocks and motor starters are located
on the equipment panel, behind the hinged control
panel, for easy access (Figure 8). The transformer and
the heater SSR’s are located in the lower compartment
with the recirculation and exhaust/cooling motors.
Electrical components are either touch-proof or are
shielded with Lexan
® material to prevent accidental
exposure during maintenance and troubleshooting.
The cooling/exhaust fan is controlled on/off by an event
relay in the Protocol 3 controller. 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 oven has a type 304-2B 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 ductwork may be easily removed for cleaning.
Heater frame, fan wheel and motor shaft are constructed of stainless steel.
Two electropolished stainless steel wire shelves are provided. The shelves are removable and
adjustable on three inch centers.
The optional Despatch Protocol Manager software is used to enable customer PC control of an
oven. Despatch Protocol 3 controllers may be networked together with a Modbus communication
option when multiple ovens are operated.
3.1.1. LCC/LCD2-14 Oven Operation Details
The LCC/LCD2-14 ovens are available with air, inert (nitrogen) or Class A atmospheres. LCC
models are rated up to 260°C, and LCD models are rated up to 350°C. Silicone free construction
is available on all models.
Figure 3. LCC/LCD2-14 Series Oven.