Despatch LCC/LCD2-14-3 Non Pass Through Series - Manual (Page 23)

14
OVEN OPERATION
Oven
The LCC/LCD2-14 Series oven is a class 100 clean room oven with HEPA (High
Efficiency Particulate Air) filtration. This oven is ideal for processes where minimization
of contamination is essential.
Forced convected airflow provides rapid uniform distribution of heat. A HEPA (High
Efficiency Particulate Air) filter is mounted in a stainless steel frame in the supply
plenum. These filters are 99.97% effective in filtering 0.3 micron particles.
For the LCC/LCD2-14 model, the cooling/exhaust 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. For Class A, the exhaust fan event relay is hardwired in
the on position, as the exhaust fan is used for removing volatiles in a “Class A” oven.
For “Class A” the exhaust fan must remain on at all times. Water cooling option is also
available for faster cool down times.
The nitrogen models have type 316 stainless steel water coil which permits rapid cool
down and lower temperature operation. The nitrogen oven comes with an adjustable
flowmeter 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.
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.
All controls are mounted on the front of the oven for easy operation and readability.
Two electropolished stainless steel wire shelves are provided. The shelves are
removable and adjustable on three inch centers.