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FP (E1.1) 03/2019 page 17/90
4.2 Connection to a suction plant (optional)
Active suction from the chamber must only be effected together with external air. Therefore, the
chamber’s exhaust air duct shall not be immediately connected to an active exhaust system.
When connecting to an active exhaust system, proceed as follows:
• Perforate the connecting piece between the exhaust air duct and the exhaust system.
Or
• Use an exhaust air funnel placed in a distance of 3-5 cm / 1 to 2 in from the exhaust air duct. The
funnel’s opening must be at least twice as large as the diameter of the exhaust air duct.
If improperly connected to an active exhaust/ventilation system, the spatial temperature
exactitude (uniformity), the heating-up and recovering times as well as the maximum
temperature of the chamber may be negatively affected.
CAUTION
The exhaust duct will become hot during operation.
Danger of burning.
∅ Do NOT touch the exhaust duct during operation.
5. Start up
Having connected the electrical supply (chap. 4.1), turn on the chamber by the main power switch (1).
Warming chambers may release odors in the first few days after commissioning. This is not a
quality defect. To reduce odors quickly we recommend heating up the chamber to its nominal
temperature for one day and in a well-ventilated location.
5.1 Air change
Opening the air flap in the exhaust duct serves to adjust the air change.
Without connecting a suction plant:
• If the air flap is open and the fan is operating, fresh air comes in via aeration gaps.
• If the air flap is completely open, the spatial temperature accuracy can be negatively influenced.
5.2 Settings at the RD3 program controller
After turning the chamber on with the main power switch (1) the controller is in Normal Display / fixed
value operation mode.
Depending on the temperature value entered before LED (3a) is lit if the heating is active, or no LED if the
actual temperature is equal to or above the set-point.
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