Menu Item
Sub-menu
Item
Sub-sub-
menu Item
Explanation
Language
Set the menu language.
Note:
A short cut to the menu language is by pressing
the OK button at the same time as the main
voltage is switched on.
Change
codeword
Set a new code for service level.
4.4 Free cooling description
The objective of the Free cooling function is to provide cool out door air if available during the night
time when the unit is in OFF position to cool down the interior of the building. During this time the heat
exchange rotor is stopped.
Note:
The following is only valid if the free cooling function is set to
Active
in the program menu.
The fans are started at
Start Cooling Hour
if the following criteria are met
simultaneously:
• all time channels are in
OFF
position and that the unit goes back to normal operation the following day
(set operation time during the following 24 hours)
and
• the average outdoor temperature is higher than the outdoor temperature limit
and
• the actual outdoor temperature is lower than the outdoor temperature set upper limit and
• the actual outdoor temperature is higher then the outdoor temperature set lower limit
and
• the actual outdoor temperature is lower than the actual room temperature
and
• the actual room temperature is higher than the set room temperature limit.
The fans are stopped at the
Stop Cooling Hour
or if the following conditions are met:
• the room temperature is lower than the set room temperature limit
or
• the outdoor temperature exceeds the set outdoor temperature upper limit
or
• the outdoor temperature is lower than the lowest set outdoor temperature limit.
The unit checks the night temperature (indoor and outdoor temperature) during 3 minutes at 12.00
PM when the fans are started so that the sensors can perform a temperature measurement. If above
conditions are met the free cooling function is started, if not the unit goes back to OFF position.
4.5 Changing fan speed
All three possible fan speed settings
LOW
,
MEDIUM
and
HIGH
can be set between 0-100% of the maximum
fan speed.
Topvex FR03, FR06, FR08, and FR11
Operation and Maintenance Instructions
206575
13
Systemair AB
