Dantherm HCC 2 Alu Service Manual page 50

System operation strategy, continued
Summer cooling
mode
Auto bypass cooling
Mode (accessory)
8
Supply fan operation will stop in summer mode.
• Cold outside air will be supplied into the house directly if opening some windows - ex-
haust fan will keep extracting air from the house creating an air flow.
• Summer mode can only be activated if T1 is above 14°C
Select summer mode on the remote, or PC-tool
Only available if mechanical bypass damper is mounted inside the unit, and enabled in the PC
tool
Automatic bypass cooling is dependent on user settings. On remote and PC-tool the follow-
ing is possible:
• Setting the minimum outside temperature within the range 8-15°C.
• Setting the bypass setpoint in which the bypass damper is opened. Range is 22-30°C, with
the possibility to select "off" to disable the auto bypass
This parameter is named Tmax.
When the following is present the automatic bypass cooling will then be active.
• If outside air is 2°C lower than inside
• AND the Tmin is higher than setpoint between 8-15°C.
• AND the Tmax is higher than setpoint (between 22-30°C)
Bypass is closed if any of the three conditions is outside range with 2°C
Bypass LED will light when damper is open
Select bypass mode on the remote, or PC-tool