enervent Svea eAir - Page 26

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Room temperature control requires that the unit has
either a temperature sensor (optional extra) connected to
the eAir control panel or a room temperature transmitter
(optional extra) connected to the eAir motherboard.
Indoor air temperature control measurements must be
activated separately from settings.
Heating is active when the control requests heating, i.e.
when the set point temperature value is higher than the
measured extract air (or indoor air) temperature. Cooling
is active when the control requests cooling, i.e. when the
set temperature value is lower than the measured extract
air (or indoor air) temperature. Heating and cooling can be
active at the same time, if the ventilation unit is equipped
with supply air absolute humidity control (optional extra).
W models have a water heating coil return water check
function that activates heating if the temperature of
the return water drops too much. If the return water
temperature is still dropping, the ventilation unit will shut
down and set a freeze protection alarm.
If Max. heating / Max. cooling is selected from the control
panel quick menu, ecient heating or cooling activates
momentarily. The function forces the supply air control
to its limit value and raises the fans to the Manual boost
level.
The function will run until the temperature value set in
the control panel main screen is reached.
Alarms
In alarm modes the ventilation unit either stops
completely (A alarms, such as re alarm) or remains in
malfunction mode, in which the fans operate at minimum
power (the so-called AB alarms, such as if supply air is too
cold).
It is possible to congure the unit so that the fans stop
also in AB-alarm.
Filter guard (optional extra)
The ventilation unit can be tted with a lter guard
function as an optional extra. Filter guard activates a
service reminder alarm if the lter is blocked. The lter
guard function requires that a ventilation unit has
dierential pressure sensors installed. These measure
the dierence in pressure caused by the lters. If the
ventilation unit is ordered from the factory with a lter
guard function, the automation will automatically
activate the lter guard function when the setup wizard is
completed. The fans will work at full power for some time,
during which the system measures the pressure dierence
caused by clean lters, and sets the right value to indicate
blocked lters. The lter guard is active following this. The
service reminder alarm is sent, if the alarm level set by the
automation is exceeded. The lter guard tests the lters
every Wednesday at 12:00. Both fans will operate at full
power for a few minutes.
The lter guard alarm must be manually acknowledged
in the Settings > Alarm > Acknowledge maintenance
notication menu. If the type or manufacturer of the lter
is changed, the alarm limits of the lter guard must be
updated. This is done in the menu: Settings > Alarm >
Update alarm limits for lter guard.