40
14.6. Setting the temperature setpoints
The Zehnder Eversky unit offers 4 temperature management modes as standard:
■
Constant supply air temperature
■
Variable supply air temperature (supply air law depending on outdoor temperature)
■
Constant return air temperature
■
Variable return air temperature (return air law depending on the outdoor temperature)
The choice of either temperature management mode depends on whether or not the room has a heating/cooling system
and on the equipment (electric or water heating coil) in the Zehnder Eversky ventilation unit.
The Zehnder Eversky unit is factory-set to variable supply air temperature.
Minimum access level: Operator
Access path to the parameters :
Temperature control
Ventilation control
Time settings
Access rights
Outside temp.: 12.4 ºC
Blowing temperature
Real: 18.1 ºC Setpt->
Real: 18 ºC
Ext. temp. comp. setpoint
-20.0
ºC
=
25.0
ºC
-15.0
ºC
=
24.0
ºC
-10.0
ºC
=
23.0
ºC
Ext. temp. comp. setpoint
10.0
ºC
=
18.0
ºC
15.0
ºC
=
18.0
ºC
14.7. Setting the night cooling function
This function allows the room to be cooled at night using fresh outside air. This reduces the risk of temperature peaks
during the day and the cooling power to be delivered during the day if a room cooling system is present.
The night cooling function is set as standard to operate from 00:00 to 07:00 (adjustable). When the Night Cooling
function is active, the hot and cold outputs are deactivated, the exchanger switches to fresh air. An adjustable fan speed
offset can be added to increase the flow rate and cooling efficiency of the room. When the Night Cooling function is
switched off, the heating is deactivated for 60 minutes (adjustable).
Operating conditions:
■
A period of less than 4 days has elapsed since the system was last switched on
■
The outside temperature was above 22 °C during the day
■
The clocks are set either to low speed or to off between 00:00 and 07:00 (the time programmes for normal speed, or
forced normal speed or external control are off)
■
It is between 00:00 and 07:00 (or set times)
■
There is an active schedule for the next 24 hours
After 3 minutes’ activation, the controller will check the shut-down conditions:
■
The outdoor temperature is above 18 °C during the night cooling period
■
The outdoor temperature is below 10 °C during the night cooling period to avoid condensation
■
The room temperature is below 18 °C
■
The time programmes for normal speed or forced speed or external control are on
The unit goes through a shut-down phase each time it enters / exits the night cooling phase.
During the night cooling period, the fans operate at normal speed for a period that can be set.
CO₂ management is deactivated during the entire night cooling period.
Zehnder Eversky
