© 2018 OJ Electronics A/S
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INSTRUCTIONS Commissioning guide for AHC-3000
20.8 Summer night cooling (free cooling)
Summer night cooling (free cooling)
Available settings
Select
√ Select summer night cooling “On/Off”
Start
√ Summer night cooling starts at a higher room temperature.
√ If no room sensor is installed, the system will start at the start time set under "Start time” in
order to measure the current room temperature.
√ The outdoor temperature must be >2°C lower than the measured room/extract temperature.
Stop
√ Summer night cooling stops at lower room temperature/extract temperature.
Outdoor stop
√ Summer night cooling stops (don't start) at a lower outdoor temperature.
Min. supply
√ Minimum supply temperature when summer night cooling is active.
√ The heat exchanger is used to ensure a minimum supply temperature
Start time
√ Earliest time when summer night cooling starts. Setting range: 8 pm – 2 am
√ If the system is not configured with a room sensor but only with an extract sensor, it will start at
the set time in order to check room temperature via the extract sensor.
√ If the system is configured with a room sensor, it will continually check the room temperature
and begin operating at the set start time.
Stop time
√ Time at which summer night cooling stops. Setting range: 3 am – 8 am
Setpoint supply air fan
√ Enter the setpoint for supply air fan during summer night cooling.
Setpoint exhaust air fan
√ Enter the setpoint for exhaust air fan during summer night cooling.
