Memmert INB 200 - 500 Incubators (Generation 2003) - Manual (Page 10)

BASIC page 10
5 Oven construction and operation
Ovens Series UNB, INB and SNB have natural ventilation.
In Series UFB amd SFB ovens, air circulation is provided by a fan on the back wall of the chamber.
The incoming air (1) is warmed in a preheat chamber (2) in both convection and fan-circulation ovens. The
preheated air enters the chamber (4) through ventilation slots (3) in the chamber side wall. The fan (5) on
the chamber back wall produces a large air throughput and a more intensive horizontal forced circulation
compared with natural convection. The air valve (6) on the back of the oven controls the rate of air intake
and discharge (air change) (7).
5.1 Operating the door
The door is opened by pulling on the door handle.
The door is closed by the door handle being pushed in.
1
air supply
fresh air
7
air discharge
5
fan
6
air valve
4
chamber
3
ventilation slots
2
preheat chamber
open
close