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Vallox 200 SE CONNECTION OF VKL POST-HEATING RADIATOR
Sample connection: separate heat exchanger for ventilation unit (non-freezing connection).
Vallox 200 Se MLV preheating/cooling radiator connection
22
RADIATOR CONNECTIONS
You need no other defrost 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 0.1 dm3/s and pressure 5...40 kPa).
MLV preheating/cooling radiator connection
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 ground collector. The
liquid returning from the MLV circuit is taken back 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 has to be lower than that of the heat pump. When the conditions for starting the
heating or cooling function have been 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 there is an open expansion tank in the heat pump,
it must be at the highest point in 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.
P
Circulation pump, not included in the delivery. Because of the risk of
condensation, the pump should be suitable for pumping a liquid that is cooler
than the surroundings (for example 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 ground collector (for example 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. Air bleeder is placed after the pump,
at the highest point in the network.
T 2-way control valve, included in the unit delivery.
A
Open expansion tank, not included in the delivery.
SV
Three-way valve, not include 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.
MLV preheating/cooling radiator connection
The radiator is connected to the pipe coming and returing from the ground
collector. When the conditions for starting the heating or cooling function
have been met, the control function of the unit opens the solenoid valve
(MV) and starts the pump (P). 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 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.
VALLOX 200 SE
GROUND COLLECTOR
GROUND COLLECTOR
HEAT PUMP
P Circulation pump, not included in the delivery. Because of the risk of
condenstion, the pump should be suitable for pumping a liquid that is
cooler than the surroundings (for example Grundfos UPS 25-80 180).
MV Solenoid valve, not included in the delivery. The valve has to be
suitable for the liquid in the ground collector (for example ELV05006,
Stig Wahlström).
R Stop valve, not included in the delivery.
IP Air bleeder, not included in the delivery.
Air bleeder is placed after the pump, 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 Pipe of ground collector (for example 32/10), not included in the
delivery.
