About The Precool And Preheat Function; About Preventing A Feeling Of Draft - Daikin VAM350J VEB Series User Reference Manual

17 | Configuration

17.5.5 About the precool and preheat function

17.5.6 About preventing a feeling of draft

Installer and user reference guide
94
Conditions
▪ The indoor temperature is higher than the air conditioning setting.
▪ The outdoor temperature is lower than the indoor temperature.
If the above conditions are NOT met, re-evaluation takes place every 60 minutes.
INFORMATION
Nighttime free cooling operation works when the heat reclaim ventilation unit is off,
so it is NOT possible to stop this function.
Setting 17(27)‑1 sets the number of hours that have to pass before the conditions
for the free cooling function are checked.
Setting 17(27)‑6 sets whether the fan runs in high or ultra high mode during the
free cooling.
Setting 17(27)‑7 sets the temperature.
INFORMATION
This function is NOT possible when the heat reclaim ventilation unit is NOT linked to
an air conditioner.
When the precool/preheat function is set, the heat reclaim ventilation unit
switches on at the configured time (30, 45, or 60 minutes) after the air conditioner
starts cooling or heating. By default, this function is off. This function must be set
with the controller of the air conditioner.
If the air conditioner is restarted within 2 hours after it has been stopped, this
function is NOT started.
Setting 17(27)‑2 enables this function.
Setting 17(27)‑3 and setting 17(27)‑9 set the delay for the start of the heat reclaim
ventilation unit.
INFORMATION
This function is NOT possible when there is a direct duct connection.
INFORMATION
The preheating/precooling function of the heat reclaim ventilation unit is disabled
when it is connected to an EKVDX.
When heating is on in a setup with air conditioner and the fan is turned off while
the defrost operation is running, the fan of the heat reclaim ventilation unit is set
to low mode or even stopped to prevent a feeling of draft.
Setting 17(27)‑5 sets the fan mode.
INFORMATION
For EKVDX combinations, positions 2, 5, 6 and 9 of field setting 17(27)–5 are NOT
allowed.
VAM350~2000J*VEB*
Heat reclaim ventilation unit
4P664012-1A – 2024.01