Operating instructions
M-WRG-S/Z-S, M-WRG-S/Z-24,
M-WRG-S/Z-EIB, M-WRG-S/Z-KNX (-F, -FC) ventilation units
- 22 -
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
12.1.4 “Intensive ventilation (15 min)” program
The ventilation unit runs at maximum ventilation level (100 m
3
/h). After roughly 15
minutes or when another button is pressed, the intensive ventilation is ended and
the previously set ventilation level is resumed.
12.1.5 “Supply air operation (Summer mode)” program
The ventilation unit runs in supply air operation with limited heat recovery. This
operating mode allows the cooler outdoor air to be routed into the building on
summer nights, for example (supply air 50 m
3
/h, extract air 15 m
3
/h).
NOTE
This ventilation program must not be used in sub-zero temperatures. Otherwise
the ventilation unit will constantly activate the frost protection function or switch off
altogether.
12.1.6 “Extract air operation” program
The ventilation unit runs in extract 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-venti-
lation can be achieved in the building by setting one ventilation unit to supply air
operation and the other to extract air operation.
NOTE
Cross-ventilation must not be used in sub-zero temperatures. Otherwise the venti-
lation unit that is set to supply air operation will constantly activate the frost protec-
tion function or switch off altogether.
12.1.7 “Humidity control” 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.
NOTE
To ensure dehumidification, the ventilation unit compares the humidity of the
supply air and extract air. The associated LED flashes when the humidity of the
supply air is greater than that of the extract air, which means that dehumidification
is not possible.
