MV
M
P
R
R
IP
R
R
PU
VV
PM
K
R
P2
A
R
T
S
R
SV
V
Y2
M
MV
P
R
R
IP
Y
VKL post-heating radiator connection
Sample connection: separate heat exchanger for ventilation unit (non-freezing connection)
You need no other anti-freeze protection if you choose a non-freezing heat transfer solution. In the sample connection the exchanger (V) is installed in the heat source. Supply air temperature is mainly
adjusted according to the temperature of supply water, adjusted with a three-way valve (SV).
Air temperature can also be adjusted and limited with a valve (T) included in the unit delivery. The valve (T) requires bypass (S). Open expansion tank (A) has a capacity of circa 2.5 litres and is mounted
on the suction side of the pump. Stop valves (R) are also installed in the pipe system. Pump (P2) is a standard heat pipe pump (pump power 0.075 l/s and pressure 5...35 kPa).
With the exception of valve (T), the components of the VKL circuit mentioned in the diagram are not included in the delivery.
When the requirements for starting the heating or cooling function are met, the control function of the unit opens the solenoid valve (MV) and starts the pump (P). The components of the MLV circuit
mentioned in the diagram are not included in the delivery. Observe the freeze resistance of the liquid used in the ground collector. The connection pipes of the MLV radiator have to insulated against
condensation.
If the heat pump has an open expansion tank, it must be situated at the highest point of the network.
Note! Because of the risk of humidity damage, supply air temperature in a duct with no condensation insulation should not go below +16...20
°
C.
ALWAYS PRIMARILY FOLLOW THE CONNECTION PLAN PREPARED BY THE HVAC PLANNER OR THE HEAT PUMP MANUFACTURER.
See the adjoining example of connecting an MLV unit to the ground collector. The supply pipe of the MLV circuit is connected to the pipe returning from the collector. The liquid returning from the MLV
circuit is taken to the return pipe of the ground collector.If the internal pressure losses of the heat pump in the ground collector are known to be high, it is recommended to bypass the heat pump. The
liquid then circulates when the heat pump is stopped. In this case the pressure loss of the bypass non-return valve (Y2) has to be lower than that of the heat pump.
© Vallox • We reserve the right to make changes without prior notification.
What the units include can vary depending on the sales area.
VALLOX 200SE
19
RADIATOR CONNECTIONS
Connection of mlv preheating/cooling radiator
The radiator is connected to the supply and return pipe of the ground
collector. When the requirements for starting the heating or cooling function
are met, the control function of the unit opens the solenoid valve (MV) and
starts the pump (P). The components of the MLV circuit mentioned in the
diagram are not included in the delivery. The radiator has Ø12 mm plastic
pipes (M) coated with an oxygen diffusion barrier. Observe the freeze
resistance of the liquid used in the ground collector. The connection pipes of
the MLV radiator have to be insulated against condensation.
Note! Because of the risk of humidity damage, supply air temperature in a duct with no
condensation insulation should not go below +16...20
°
C.
GROUND COLLECTOR
P
Circulation pump, not included in the delivery. Because of the risk of
condensing, the pump should be suitable for pumping liquid colder
than the ambient temperature (e.g. Grundfos Magna 1 25-80).
P2 Circulation pump, not included in the delivery.
MV Solenoid valve, not included in the delivery. The valve has to be
suitable for the liquid in the gro und collector (e.g. ELV05006, Stig
Wahlström)
Y
Non-return valve, not included in the delivery.
R
Stop valve, not included in the delivery.
IP Air bleeder, not included in the delivery. Is placed after the pump
and at the highest point in the network.
T
Two-way control valve, included in the unit delivery.
A
Open expansion tank, not included in the delivery.
SV Three-way valve, not included in the delivery.
S
Bypass valve, not included in the delivery.
Y2 Non-return valve (not included in the delivery).
The pressure loss of the valve has to be lower than that of the heat
pump.
P Circulation pump, not included in the delivery. Because of the risk of condensing, the
pump should be suitable for pumping liquid colder than the ambient temperature
(e.g. Grundfos MAGNA 1 25-80).
MV Solenoid valve, not included in the delivery. The valve has to be suitable for the liquid
in the ground collector (e.g. ELV05006, Stig Wahlström)
R Stop valve, not included in the delivery.
IP Air bleeder, not included in the delivery. Is placed after the pump and at the highest
point in the network.
K Expansion tank, not included in the delivery.
VV Relief valve, not included in the delivery.
PM Pressure gauge, not included in the delivery.
PU Ground collector pipe (e.g. 32/10), not included in the delivery.
GROUND COLLECTOR
HEAT PUMP
