Table of Contents
Advertisement
DV245
SUPPLY
AIR
Adroit ventilation unit
INPUT FROM THE
DISTRIBUTION BOARD
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.
E
Circulation pump. Not included in the delivery. The
pump should be suited to pumping liquid colder than the
surrounding air, due to risk of condensation (for example,
Grundfos Magna 1 25-80).
Solenoid valve. Not included in the delivery. The valve that
V
is chosen must be compatible with the heat collection circuit
fluid.
K
Condensing water tube. Not included in the delivery.
IP De-aerator. Not included in the delivery.
S
External electrical junction box for the DV245.
24 VDC relay/contactor for controlling the pump and the
C
solenoid valve. Not included in the delivery. (For example,
ABB CR-P024DC2)
Y
One-way valve. Not included in the delivery.
Y2 One-way valve. Not included in the delivery. The pressure
loss must be less than the pressure loss of the heat pump.
HEATING AND COOLING RADIATOR
IP
RADIATOR (REVERSE
CONNECTION)
S
C
K
V
P
40
OPERATION CHARTS
HEAT
PUMP
HEAT COLLECTION CIRCUIT
NOTE: HEATING
The pump starts when the outdoor
air temperature drops below the
winter limit value set at the factory
(-5 °C).
NOTE: COOLING
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.
NOTE
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.
NOTE
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.
OUTDOOR
AIR
Advertisement
Table of Contents
