Despatch LCC1-51-3 - Manual (Page 30)

21
OVEN OPERATION
Oven
The stackable LCC 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.
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.
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 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 two inch centers.