Operating instructions
M-WRG-S/Z-T(-F,-FC) / M-WRG-S/Z-T(-F,-FC)-FU ventilation unit
- 24 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
V E N T I L AT I O N & H E AT R E C O V E R Y
10.6 “Exhaust air operation” ventilation program
Exhaust air operation with limited heat recovery. This operating mode can be
selected to route used air to the outside (supply air 15 m
3
/h, extract air 50 m
3
/h).
If there are two ventilation units present, cross-ventilation can be achieved in the
building by setting one ventilation unit to supply air operation and the other to ex-
haust air operation.
NOTE
Cross-ventilation must not be used in sub-zero temperatures. Otherwise the ventilation unit that is
set to supply air operation will constantly activate the frost protection or switch off altogether.
10.7 “Humidity control” ventilation program
The ventilation unit runs constantly at the lowest ventilation level (15 m
3
/h). If the
relative room air humidity exceeds 60 % RH, the ventilation level is increased
continuously up to max. 60 m
3
/h until the room air humidity drops back below 60 %
RH. To ensure dehumidification, the ventilation unit compares the humidity of the
supply air and extract air. A flashing LED on the InControl pushbutton sensor sig
-
nals that the humidity of the supply air is greater than that of the extract air. On the
wireless remote control, the LED only flashes when it displays the current ventilation program (see
section 9.2.1 on page 22). Dehumidification is thus not possible and the ventilation unit works at
the lowest ventilation level.
10.8 “CO
2
control / Air quality” ventilation program
The ventilation program uses a CO
2
and mixed gas sensor to monitor the air quality
and automatically ensures an optimum air exchange and continuous removal of
air pollutants. The carbon dioxide (CO
2
) that is breathed out by people impairs the
air quality in high concentrations. Consequences include concentration problems
and tiredness. However, they can also be caused by odours or volatile organic
compounds (VOCs), such as those that outgas from cleaning agents, paints or fit
-
ments. VOCs can be harmful to the health in higher concentrations or if you stay in such rooms for
long periods. The ventilation unit automatically reduces the pollution concentration to a minimum
via the air exchange, and thus ensures good room air quality.
The ventilation unit runs constantly at the lowest ventilation level (15 m
3
/h). If the limit of 600 ppm
is exceeded, the ventilation unit calculates the optimum air renewal and sets the required ventila-
tion level in the range from 15 - 60 m
3
/h fully automatically.
NOTE
—
When it is started up for the first time, the ventilation unit must remain switched on for at
least 4 hours without interruption so that the CO
2
and mixed gas sensor can be calibrated.
►
Make sure that the air is not severely contaminated during the calibration phase by
solvents, for example.
—
When you switch on again, it will take roughly 15 minutes for the sensor to recalibrate.
CO²
