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Topvex TX03-06
Operation and Maintenance instructions
205875
Systemair AB
3
Operation
General
Topvex unit with Electrical heater have 3 minutes of re-cooling after that it has been turned off.
N.B.
If activating the fire alarm when the heater is on the fan stops immediate without re-cooling, this can
cause the overheating protection to trip. See page 6
Alarms –Overview
how to reset.
When changing a parameter in the control system it takes up to 1 minute for the change to be carried out.
Free cooling
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
exchanger is by-passed.
NB 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)
• the average outdoor temperature is higher than the out door temperature limit
• the actual outdoor temperature is lower than the outdoor temperature set upper limit
• the actual outdoor temperature is higher then the out door temperature set lower limit
• the actual outdoor temperature is lower than the actual room temperature
• 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.
