Operating instructions
M-WRG-S/Z-T(-F,-FC) ventilation unit
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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
6.3
Operation at cold times of year
NOTE
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During cold times of year, run the ventilation unit in continuous mode.
— Do not use the “Supply air operation” program in sub-zero temperatures (see section
10.5 on page 22). Otherwise the ventilation unit will constantly activate the frost
protection function or switch off altogether.
— Energy-saving motors and an innovative controller ensure a very low power con-
sumption, even in continuous mode (roughly 3.8 W at the lowest level).
— Continuous removal of moisture from the interior is only guaranteed in continuous
mode.
— The condensate is only routed outside in continuous mode.
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In the following cases, run a 10-minute intensive ventilation at maximum power level:
— regularly if there is high atmospheric humidity in the interior
— if you need to switch off the ventilation unit.
This will remove any condensate that is present in the ventilation unit.
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Maintain the temperature in bedrooms at 16 °C to 18 °C or more. This temperature is
also more healthy for the people in the bedrooms. Do not run the ventilation unit at room
temperatures below 15 °C, and particularly not at low external temperatures below -5 °C.
Otherwise the ventilation unit will constantly activate the frost protection function or switch
off altogether. The higher the interior temperature, the bigger the buffer for operating the
ventilation unit and for heat recovery.
6.4
Air filters
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Never run the ventilation unit without air filters.
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Always use genuine Meltem filters. These are precisely matched to your M-WRG venti
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lation units, ensure minimal pressure losses and will ensure a long service life from your
ventilation units.
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For hygiene reasons, replace both filter cartridges at least 1x every year, ideally before the
period of cold weather.
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Observe the audible and visual filter change indicator and replace the air filters as neces
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sary.
