S&P CAD HE 450 H BASIC, Руководство пользователя

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33
ENGLISH
7.
FROST PROTECTION MODE
CAD HE 450 EC H BASIC
All standard units have an automatic frost protection system installed. In the case that
the exhaust air (EHA) temperature fall below 5
o
C and the outdoor air temperature is
less than 0
o
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
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
temperature conditions are favourable to return to work normal.
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
the unit in case of pressure difference in the house.
CAD HE
450 EC H BASIC “PH”
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
works fully autonomous without any need for adjustments from user side.
Function:
In the case that the exhaust air (EHA) fall below 5
o
C the frost protection starts
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
keep the exhaust temperature (EHA) above 3
o
C the velocity of both fans will be
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.
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.
Technical datas:
Electrical supply: ~230 V 50 Hz
Power: 1500 W
Absorbed current: 6,8 A
Thermal difference at nominal airflow:
: Electric power
Q: Airflow
: Specific heat of air
: air density
33
ENGLISH
7.
FROST PROTECTION MODE
CAD HE 450 EC H BASIC
All standard units have an automatic frost protection system installed. In the case that
the exhaust air (EHA) temperature fall below 5
o
C and the outdoor air temperature is
less than 0
o
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
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
temperature conditions are favourable to return to work normal.
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
the unit in case of pressure difference in the house.
CAD HE 450 EC H BASIC “PH”
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
works fully autonomous without any need for adjustments from user side.
Function:
In the case that the exhaust air (EHA) fall below 5
o
C the frost protection starts
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
keep the exhaust temperature (EHA) above 3
o
C the velocity of both fans will be
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.
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.
Technical datas:
Electrical supply: ~230 V 50 Hz
Power: 1500 W
Absorbed current: 6,8 A
Thermal difference at nominal airflow:
: Electric power
Q: Airflow
: Specific heat of air
: air density