Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 6 -
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 A T I O N & H E A T R E C O V E R Y
with a VOC sensor; if the air load is high (e.g. due to biological decay and decompo-
sition processes, motor traffic exhaust fumes or volatile by-products from industrial
and commercial operations) the proportion of supply air can be reduced temporarily
until the available outdoor air quality has improved (only for units with a CO
2
sensor,
specifically M-WRG-II...-T-FC units).
The ventilation units are designed to run continuously and can be equipped with sensors
for demand-controlled ventilation. They can be surface-mounted, flush-mounted or inte-
grated into the wall (U
2
). The ventilation units are low-maintenance, but
regular air filter
changes
are important.
The ventilation units from the M-WRG-II P-T and M-WRG-II E-T series are equipped with
an interface to which an InControl pushbutton sensor, a three-step rotary switch with zero
position and an optional pushbutton for activating an intensive ventilation program may be
connected. This allows the ventilation units to be operated both via the InControl push-
button sensor or three-step rotary switch and via the membrane touch pad on the unit.
The 5 buttons on the membrane touch pad on the side of the unit are used to set different
ventilation levels / programs and a time-limited intensive ventilation program. It therefore
allows you to adapt the air flow to your needs.
Beside each button is an LED that displays the active ventilation program and further
information about the unit’s status (air filter change, fault, etc.).
The ventilation units from the M-WRG-II P-T and M-WRG-II E-T series are equipped with
heat exchangers that work on the cross-counterflow principle. M-WRG-II E-T also has a
function for recovering moisture from the extract air (enthalpy heat exchanger).
The M-WRG-II P-T-F and M-WRG-II E-T-F ventilation units have various ventilation
levels / programs, including a humidity control. In addition to the humidity control,
M-WRG-II P-T-FC and M-WRG-II E-T-FC units have a CO
2
control or an automatic
mode (humidity and CO
2
control). The CO
2
value is the most important measurement for
assessing the air quality. A microprocessor integrated into the unit calculates the optimum
air renewal from the values measured by the relative humidity and CO
2
sensors and sets
the correct ventilation level fully automatically.
1.2.1 InControl pushbutton sensor
One to five ventilation units of the same
type can be controlled in a room with
one InControl pushbutton sensor. Six
different ventilation programs can be
selected. The LEDs integrated into the
pushbutton sensor indicate the currently
active ventilation program and whether
an air filter replacement is required or a
fault message is pending.
Fig. 2:
InControl pushbutton sensor M-WRG-T/...
CO²
