BLUE M
Model ESP400 Industrial Oven
Page 21
One-Pass Air Circulation System:
To operate with a One-Pass Air Flow System, the air intake and exhaust dampers must be fully opened.
When the intake damper is fully opened, it will totally close off the recirculation path to the conditioning
plenum from the left duct wall. Fresh ambient air will be drawn into the blower wheel inlet and then heated as
it is forced through the heater stack.
Heated air will be discharged up into the right duct wall and into the workspace. It flows horizontally across
the workspace to condition the product and exits through the left duct wall. Since the recirculation path is
blocked by the intake damper, 100% of all process air is forced out of the exhaust damper. No air is recycled.
This system will permit fast drying times, purge process vapors, and allow near ambient operation.
Full Recirculated Air Flow:
To operate with a Full Recirculated Air Flow System, both the intake and exhaust dampers must be fully
closed. 100% of chamber air will be recirculated. This system allows rapid heat up rates and better
temperature uniformity than with the One-Pass System.