Heating And Cooling Radiator Operation Charts - Airflow Adroit DV245 Instruction Manual

DV245
(Integral CO Sensor)
2
OPERATION AND SAMPLE CONNECTION
Always follow first and foremost the connection diagram
provided by the HVAC designer or heat pump manufacturer.
The accompanying figure shows an example of the arrangement
for connecting the heating/cooling radiator unit to the heat
collection circuit.
Connect the radiator output pipe to the heat collection circuit return
pipe. Direct the fluid returning from the radiator unit to the heat
collection circuit return pipe. If you know that there is a large loss
of internal pressure inside the heat pump, the heat pump should be
bypassed. If this is done, the fluid circuit will come into operation
when the heat pump comes to a halt. When this happens the
pressure loss in the one-way bypass valve Y2 must be lower than
the pressure loss in the heat pump.
The duct radiator can be installed in both the supply air duct
and the outdoor air duct. If the radiator is installed in the outdoor
air duct, it can be used for both preheating and cooling, or for
preheating or cooling alone.
The duct radiator can be set to function either automatically or
manually.
Automatic - In summer, the supply air temperature will be
maintained at the level specified in the temperature setting. In
winter, the duct radiator will turn on, when the outdoor temperature
falls below the winter setting.
Manual - In summer, the duct radiator will turn on, when the
outdoor temperature rises above the summer setting. In winter, the
duct radiator will turn on, when the outdoor temperature falls below
the winter setting.
To prevent the risk of condensation in the supply air duct, you can
set the adjustment of the supply air limit to automatic or manual.
Automatic - The supply air limit is adjusted automatically based on
the dew point of the extract air. When the supply air temperature
falls too low, the duct radiator will turn off.
Manual - The supply air limit can be set manually. When the supply
air temperature falls down to the set value, the duct radiator will
turn off.
If an external sensor is in use, it is selected from the settings of the
external sensor whether it is used to control the outdoor air duct
radiator or the supply air duct radiator.
HEATING AND COOLING RADIATOR
OPERATION CHARTS
If the duct radiator is used
in the supply air duct, it can
only be used for cooling.
When used to control the outdoor
air duct radiator, the exter nal NTC
sensor is ins talled in the outdoor
air duct before the radiator. When
used to control the supply air duct
ra diator, the external NTC sensor
is installed after the radiator.
The pump starts when the outdoor
air temperature drops below the
winter limit value set at the factory
(-5 °C).
The value set for the supply air
temperature of the active profile
(e.g. At home) controls the startup
of the pump. The pump starts when
the supply air setting is below the
temperature of the supply air that is
blown into the apartment.
Due to the risk of humidity damage,
in a duct that has not been
insulated for condensation the
supply air temperature must not fall
below 16 ... 20 °C.
When selecting the relay, take
account of the maximum allowed
combined power supply (6W) of
the circuit card in the external
connection box, if the relay power is
obtained from the circuit board
+24V connector.
50
NOTE
NOTE
NOTE: HEATING
NOTE: COOLING
NOTE
NOTE