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About nighttime heat purge operation
• Nighttime heat purge is a function to reduce the
room air conditioning load in the morning in
summer by exhausting the air indoor which has
become warm while the air conditioner is
stopped in the night automatically in the Bypass
mode.
•
The nighttime heat purge operation functions if
night purge is activated and the last operation
mode of the air conditioner before stopping is
,
or
in an Air to Air Heat Exchanger
system linked with air conditioners.
If the
button is pushed while the system is
running, the operation lamp turns off,
appears on
the display, and the nighttime heat purge operation
turns on-standby.
After the operation becomes on-standby, the unit
automatically starts ventilation in [Low] ventilation
fan speed and [Bypass mode] when the conditions to
start the nighttime heat purge operation below are
fulfilled.
The nighttime heat purge operation is paused for one
hour if any of the conditions to pause the operation
are detected.
If the conditions to start the nighttime heat purge
operation are fulfilled one hour after the pause, the
operation will start again. If not, the operation will
remain paused for one more hour.
This cycle is repeated until the conditions to stop
(end) the nighttime heat purge operation below are
fulfilled.
NOTE
• The setting of the nighttime heat purge operation is
“OFF” as factory default.
Consult your dealer to change the setting to “ON” or
the setting of the time until the monitoring operation
starts.
• The settings of
or
cannot be changed during
the nighttime heat purge operation. Their indicators
are not displayed.
• The
indicator stays lit while the operation is on-
standby or paused.
• The nighttime heat purge operation cannot be
activated if 24-hour ventilation is activated.
CAUTION
The nighttime heat purge operation is not executed if the
outdoor temperature becomes about 15°C or less to
prevent condensation in the Air to Air Heat Exchanger,
but the
indicator is still lit.
The conditions to start the nighttime heat purge
operation
The unit compares temperatures indoor and outdoor
using the monitoring operation (for about 5 minutes)
and will start the nighttime heat purge operation if the
following conditions are fulfilled.
1. A certain amount of time has passed between the
nighttime heat purge operation becoming on-
standby and the monitoring operation starting. (The
time is set between 1- 48 hours in 1 hour steps.)
2. The indoor temperature is 3°C or more higher than
the outdoor temperature and the indoor
temperature is 2°C or more higher than the
temperature set for the operation.
The conditions to pause the nighttime heat purge
operation (the operation pauses for one hour.)
1. The indoor temperature is the same or lower than
the outdoor temperature, the indoor temperature is
the same or lower than the temperature set for the
operation, or one hour has passed since the
nighttime heat purge operation started.
The conditions to stop (end) the nighttime heat
purge operation
The nighttime heat purge operation ends and the
indicator disappears if any of the following conditions
are fulfilled.
1. The air conditioner or Air to Air Heat Exchanger is
started.
2. 48 hours has passed since the monitoring
operation started.
Summary of Contents for VN-M1000HE
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