GB.GOLDSKE.160901
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We reserve the right to alter specifications without notice.
6.4.2.14 Summer night cool
The lower temperature at night is utilised to cool down the
building structure. This reduces the cooling load during the first
hours of the day. If a cooling unit is installed, it will not need to
be operated, thus offering savings. If no cooling unit is installed,
a certain cooling effect will still be achieved.
When the function is activated, the AHU fans operate at high
speed, with a supply air set point of 10 °C (factory setting) from
the preset time until the conditions necessary for stop are satis-
fied.
An extra temperature zone (Xzone), if required, obtains the same
supply air set point if Summer night cool is in operation.
Conditions that must be met for Summer night cool to start at
the preset time:
• The time is between the preset start time and stop time.
• The outdoor air temperature shall be higher than the preset
value.
• The extract air temperature shall be higher than the preset
value.
• The extract air is at least 2 °C warmer than the outdoor air.
• Heating has not been required between 12.00 and 23.59
hours.
• The air handling unit shall be running at low speed or be in
the normal stop operating mode.
• Intermittent night heat has not been active during the day.
Conditions that must be met for Summer night cool to stop:
• The time is not between the preset start time and stop time.
• The extract air temperature drops below the preset value.
• The outdoor temperature drops below the preset value.
• The extract air is less than 1 °C warmer than the outdoor air.
• The air handling unit is running at normal high speed or
external/manual stop has been activated.
The function starts once per preset time period.
Settings:
Value Setting
range
Factory
setting
Summer night cool On/Off Off
Start time 00:00-00:00 23:00
Stop time 00:00-00:00 06:00
Outdoor air, start -5 - +15 °C 10 °C
Extract air, start 17 - 27 °C 22 °C
Extract air, stop 12 - 22 °C 16 °C
Supply air, set point 0 - 20 °C 10 °C
Summer night cool
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