Meltem M-WRG-S-T, Operating Instructions Manual

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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
info@meltem.com · 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
9 Operating the ventilation unit
9.1 Selecting the ventilation program with the InControl pushbutton sensor
— Press one of the six buttons on the InControl pushbutton sensor to select the required
ventilation program (see section 10 on page 21). The LED on the corresponding button
lights up.
— If there are multiple ventilation units of the same type connected to an InControl pushbut-
ton sensor, the same ventilation program is activated for all the ventilation units.
— If there are multiple ventilation units of the same type with humidity and/or mixed gas/CO
2
control connected to an InControl pushbutton sensor, each ventilation unit regulates the air
exchange on the basis of its own measured values.
— The ventilation unit starts the most recently selected ventilation program in the following
situations:
— after a power cut
— when the switched off ventilation unit is switched on again at the mains switch.
9.2 Set ventilation unit to Standby mode
► Hold down the button for the “Reduced ventilation” program on the InControl pushbutton
sensor (see section 10.1 on page 21) for at least 3 seconds to switch from Ventilation
mode to Standby mode.
This triggers the following actions:
— The current ventilation mode is ended.
— The ventilation unit continues to be supplied with power.
— Close the air flaps.
► Press any button on the InControl pushbutton sensor or press the stepping switch for three
power levels (see section 7.1 on page 17) to switch from Standby to Ventilation mode.
NOTE
— It is not a good idea to leave the ventilation unit in Standby mode for long periods (see
„Rules for correct usage“ on page 15).
— Standby mode is disabled at the factory in association with the “Mains switch without func-
tion” option, type: M-WRG-O/NOF.
9.3 Frost protection function
The ventilation unit is equipped with a frost protection function. In low outdoor temperatures, the
ventilation unit automatically switches to frost protection mode.
► Do not switch the ventilation unit off in the winter. Note section „6 Rules for correct usage“
on page 15.
How it works (extract from the national technical approval Z-51.3-138):
To prevent the heat exchanger from icing up, there is a temperature sensor fitted on the exhaust
air side for constantly monitoring the temperature. If the exhaust air temperature drops below 2 °C,
the motor controller gradually changes the supply air and/or extract air volume flow according to
the fan level so that the proportion of extract air is increased. This causes the temperature to rise