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Features - 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 return 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.
◆ Easy installation
The linear air supplying/exhausting method enables
simple design and installation.
Inverted installation is possible and only one inspection
slot is required for two units.
A complete inspection is possible through a single
inspection slot.
◆ Other
The filter has excellent dust filtering performance
(mass spectrometry 82%).
The air volume can be switched between Extra High
and High.
The ventilation balance of air supplying and air
exhausting can be changed.
The filter inspection display function calculates the total
running time and prompts you through the remote
controller to inspect the filter.
The cold mode function automatically makes the air
supplying motor run intermittently when the outdoor air
temperature is -10°C or lower.
The timer function allows you to set the unit to start/
stop operation at the specified time.
The separately sold central controller enables central
control of 128 groups.
The separately sold wired remote controller enables
group operation control of up to 8 units.
The unit can operate in cooperation with an air-
conditioner (SMMS series, DI/SDI series).
About ventilation modes
The unit has three ventilation modes.
• Heat exchange mode
Exchanging heat between the outdoor air and return
air and making the temperature and humidity of the
outdoor air closer to those of the return 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 return air and outdoor air
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 return air and outdoor air
temperature sensors in the unit.
CAUTION
If the outdoor air 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.
10

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