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ENGLISH
L1315004 Installation guide for DucoBox Energy Premium (Revision H | 10.02.2020)
Frost protection
There is a possibility at low outdoor temperatures that the moisture in the
exhaust air will condense in the heat exchanger� The DucoBox Energy Pre-
mium features various mechanisms to counter this condensate freezing:
• The unit can be equipped with a heating element (= optional) to add heat
to the outdoor air in order to prevent it from freezing up�
• In addition to this, the unit will adjust air flow rates such that freezing up
will be prevented (= temporary imbalance method)�
The frost symbol ( ) will be shown on the display whenever frost protecti-
on is in operation�
The electric heating element (if fitted) can be deactivated, frost protection
itself cannot be deactivated� The unit will adjust flow rates when the hea-
ting element is deactivated in order to prevent freezing up� However, Duco
advises against changing the standard settings�
Frost protection settings
SETTINGS
FROST PROTECTION
STATUS
(for informa-
tion)
NORMAL
: frost protection on standby
ACTIVE
: frost protection in operation
HEATER
Only if the unit is fitted with a heating element�
ALLOW
: use heater to heat air
REFUSE
: do not use heater
PASSIVE HOUSE
For DucoBox Energy Premium 325 with heating
element only�
ON
: deactivate imbalance method as frost
protection
OFF
: normal frost protection operation
(including allow imbalance method)
What happens if there is a freeze-up?
If, despite the built-in frost-protection mechanisms, the DucoBox Energy Premium should freeze up
solid in exceptional circumstances, this will be shown on the display� As a result, the DucoBox Energy
Premium will shut down all ventilation temporarily for 8 hours, after which it will attempt to start
up the ventilation again� If the unit is still frozen, it will shut down the ventilation permanently� If this
is the case, once the unit has thawed out completely, the occupant needs to withdraw the plug and
re-insert it in order to restart the ventilation�
