Frost Protection Mode - S&P CAD HE 450 H BASIC Manuel D'instructions

FROST PROTECTION MODE

7.
FROST PROTECTION MODE
7.
CAD HE 450 EC H BASIC
CAD HE 450 EC H BASIC
All standard units have an automatic frost protection system installed. In the case that
All standard units have an automatic frost protection system installed. In the case that
the exhaust air (EHA) temperature fall below 5
the exhaust air (EHA) temperature fall below 5
o
less than 0 C the defrost mode will start. The supply fan decreases the velocity whilst
o
less than 0 C the defrost mode will start. The supply fan decreases the velocity whilst
the exhaust fan works on the nominal airflow. This unbalance avoids the building of ice
the exhaust fan works on the nominal airflow. This unbalance avoids the building of ice
into the exchanger. In case that this unbalance will not be enough the unit stops during
into the exchanger. In case that this unbalance will not be enough the unit stops during
2 hours. Every 2 hours the IDEO will start-up for a short time to check if the
2 hours. Every 2 hours the IDEO will start-up for a short time to check if the
temperature conditions are favourable to return to work normal.
temperature conditions are favourable to return to work normal.
We recommend not to use this unit in combination with devices which are using
We recommend not to use this unit in combination with devices which are using
combustion air unless there is a security device installed which would switch of
combustion air unless there is a security device installed which would switch of
the unit in case of pressure difference in the house.
the unit in case of pressure difference in the house.
CAD HE 450 EC H BASIC "PH"
CAD HE 450 EC H BASIC "PH"
In the "PH" units there is installed an electric heater element as a pre-heater. This pre-
In the "PH" units there is installed an electric heater element as a pre-heater. This pre-
heater avoids the ice building in the exchanger without unbalancing the airflows and
heater avoids the ice building in the exchanger without unbalancing the airflows and
works fully autonomous without any need for adjustments from user side.
works fully autonomous without any need for adjustments from user side.
Function:
Function:
In the case that the exhaust air (EHA) fall below 5
In the case that the exhaust air (EHA) fall below 5
activating the pre-heater. The pre-heater is working proportional in dependency of the activating the pre-heater. The pre-heater is working proportional in dependency of the
temperatures measured by the unit. If the power of the pre-heater is not enough to temperatures measured by the unit. If the power of the pre-heater is not enough to
keep the exhaust temperature (EHA) above 3 keep the exhaust temperature (EHA) above 3
reduced proportionally in order to increase the temperature for the supply air. If this is
reduced proportionally in order to increase the temperature for the supply air. If this is
still not enough, to the avoid freezing of the exchanger, the unit stops during 2 hours.
still not enough, to the avoid freezing of the exchanger, the unit stops during 2 hours.
Every 2 hours the IDEO will start-up for a short time to check if the temperature
Every 2 hours the IDEO will start-up for a short time to check if the temperature
conditions are favourable to return to work normal.
conditions are favourable to return to work normal.
Technical datas:
Technical datas:
Electrical supply: ~230 V 50 Hz
Electrical supply: ~230 V 50 Hz
Power: 1500 W
Power: 1500 W
Absorbed current: 6,8 A
Absorbed current: 6,8 A
Thermal difference at nominal airflow:
Thermal difference at nominal airflow:
: Electric power
: Electric power
Q: Airflow
Q: Airflow
: Specific heat of air
: Specific heat of air
: air density
: air density
o
C and the outdoor air temperature is
o
C and the outdoor air temperature is
o
o
C the frost protection starts
C the frost protection starts
o o
C the velocity of both fans will be C the velocity of both fans will be
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