Orcon HRC-EcoMax Series Installation Manual page 7

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3.2 Operation
Bypass
In the summer, or when heat recovery is not desirable, the air is not passed through,
but past the heat exchanger thanks to a bypass module. This makes it possible to
ventilate the home with fresh outside air in the summer situation, during the night,
so that the home is relatively cool again in the morning. The bypass opens when the
inside temperature exceeds the set comfort temperature of 23°C and the outside
temperature exceeds 15°C.
Frost protection
When the outside temperature in winter is around freezing, it is possible for ice to
form in the exchanger. Cold air is blown into your house as a result. To prevent this,
the HRC will heat the exchanger in time using the warm indoor air from your home.
The unit will temporarily create an imbalance to achieve this.
For the MaxComfort models, the built-in preheater switches on and warms up the cold
incoming outside air.
Constant volume
The unit is equipped with a constant volume control. This ensures that deviations
in the air flow rates between the supply and extract air, for example due to weather
conditions or when the filters become contaminated, are corrected automatically.
In this way the unit remains constantly balanced and you are assured of sufficient air
with maximum efficiency.
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