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ENGLISH
L1315004 Installation guide for DucoBox Energy Premium (Revision J | 22.10.2021)
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
Premium 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
protection 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
heating 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
information)
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�
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22/10/2021 11:52:07
22/10/2021 11:52:07
