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Features; Main Features; Humidity Control - Toshiba VN-M150HE Service Manual

Air to air heat exchanger concealed microcomputer control type
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Features

Main features

◆ Power saving ventilation
The cost of cooling and heating is reduced thanks to
the unit efficiently retrieving thermal energy (outdoor
air load) which has been lost during ordinary
ventilation.
◆ Space saving
Significant reduction of outdoor air load and the ability
to retrieve thermal energy enable the production of
smaller air conditioning devices.

◆ Humidity control

When cooling, highly humid outdoor air is conditioned
to near the humidity of the dehumidified (cooled) indoor
air before being supplied.
When heating, moisture from the indoor air is
transferred to the dry outdoor air before the outdoor air
is supplied.
◆ Comfortable ventilation
Ventilation without big changes in temperature is
realized.
In addition, stable ventilation is possible even in an air
tight room due to simultaneous air intake and
expulsion.
◆ Sound insulation
Air trunks and heat exchange elements provide sound
insulation.
They reduce the incoming of outdoor noise and the
outward flow of sounds indoor and help keep the office
or shop, and their surroundings quiet.
About ventilation modes
The unit has three ventilation modes.
• Heat exchange mode
Exchanging heat between the outdoor and indoor air
and making the temperature and humidity of the
outdoor air closer to those of the indoor air before
supplying it.
• Bypass mode
Outdoor air is taken into a room as it is. This mode is
mainly used in spring and summer.
• Automatic mode
1. For an Air to Air Heat Exchanger system
The heat exchange mode and the bypass mode are
automatically switched between following the
information from the indoor and outdoor temperature
sensors in the unit.
2. For an Air to Air Heat Exchanger system linked with
air conditioners
The heat exchange mode and the bypass mode are
automatically switched between depending on the
operation status of the air conditioner (cooling,
heating, dry, fan, or temperature setting) and the
information from the indoor and outdoor temperature
sensors in the unit.
CAUTION
If the outdoor temperature becomes about to 15°C or
less in [Automatic mode] or [Bypass mode], the system
will automatically start to run in [Heat exchange mode]
regardless of the mode setting to prevent condensation
in the Air to Air Heat Exchanger.
* The indication of the ventilation mode setting does not
change.
69

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