15
© Vallox Oy - All rights reserved
ENGLISH
INSTALLATION
System components
P
Circulation pump. Not included in the delivery. The
circulation pump must be compatible with the fluid
used in the heat collection circuit, and its capacity
must be correct. (For example, Grundfos Magna 1
25-80).
MV Solenoid valve. Not included in the delivery. The
valve that is chosen must be compatible with the
heat collection circuit fluid (For example, Danfoss
032U157131).
T1
Safety thermostat for preventing the accumulation
of condensate. Not included in the delivery. T1 is
used when outdoor air temperature exceeds the
set limit value. Adjustment range: +10...+30 °C.
T2
Heating thermostat. Not included in the delivery.
T2 turns the pump on and opens the solenoid
valve when the temperature falls below the set limit
value. Adjustment range: -10...+20 °C.
T3
Cooling thermostat. Not included in the delivery.
T3 turns the pump on and opens the solenoid
valve when the temperature exceeds the set limit
value. Adjustment range: +0...+30 °C.
L
Supply air thermometer. Not included in the
delivery.
K
Condensing water tube. Not included in the
delivery.
IP
De-aerator. Not included in the delivery.
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.
Installation instructions
Always follow first and foremost the connection
diagram provided by the HVAC designer or heat pump
manufacturer.
Connect the duct radiator output pipe to the heat
collection circuit return pipe. The fluid returning from the
duct radiator is directed back to the heat collection circuit
return pipe. Be sure to take account of the resistance to
frost of the fluid used in the heat collection circuit (see the
chart on page 6).
Only appropriate condensate insulation can prevent the
formation of condensing water on the outside surface of
the duct. To prevent moisture damage, the outdoor air
duct must be insulated with 20 mm closed cell condensate
insulation.
When a duct radiator is used, it is recommended that the
supply air duct be located in heated indoor premises (e.g.
inside a false ceiling). NOTE! The supply air duct must be
insulated with 20 mm closed cell condensate insulation.
If the pressure loss inside the heat collection circuit of the
heat pump is known to be high, it is recommended that
the heat pump 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.
If the duct radiator is used both for preheating and cooling,
it must be installed in the outdoor air duct before the
ventilation unit. In this case, the pump and the solenoid
valve can be controlled using a MyVallox ventilation unit,
and no separate thermostats are needed (see the user
instructions for MyVallox ventilation units). If a MyVallox
ventilation unit is not used for controlling, thermostats T1,
T2 and T3 are needed.
If the duct radiator is only used for cooling, it can be
installed in the supply air duct after the ventilation unit. In
this case, the heating thermostat (T2) is not needed.
A MyVallox ventilation unit cannot be used for controlling a
duct radiator that is used for cooling. Instead, thermostats
T1 and T3 must be used.
NOTE! MyVallox ventilation units can be used for
controlling the pump and the solenoid valve. In such a
case, no separate thermostats are needed. (See the user
instructions for MyVallox ventilation units)
K
P
MV
T1
T2
T3
VALLOX
0
10
20
30
40
°C
VALLOX
0
10
20
3
0
40
°C
VALLOX
0
10
20
30
40
°C
L
Y
Y2
Heat pump
Ventilation unit
Sensor
Air extraction
Outdoor
air
Supply
air
Heat collection circuit
Duct radiator (reverse connection)
System operation chart
