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 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.
RADIATOR HEATING
HEAT PUMP
UNDERFLOOR HEATING
Heating water
adjustment
© Vallox • We reserve the right to make changes without prior notice.
Vallox 200 SE MLV Connection of MLV preheating/
cooling radiator to the ground collector
of ground-source heat pump
Vallox 200 SE Connection of VKL post-heating radiator
Sample connection: direct connection to underfloor heating or radiator network
21
RADIATOR CONNECTIONS
P Circulation pump, not included in the delivery. Because
of the risk of condensing the pump should be suitable
for pumping liquid that is colder than the ambient
temperature (such as 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
(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 and at the highest point in the
network.
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.
It is sometimes convenient to connect the unit directly into the heating network. The connection involves a risk of freezing for the radiator although efforts have been made in the unit to minimise the risk
of freezing of the radiator. The unit stops if supply air temperature goes below the set temperature and automatically starts as soon as temperature rises above the value set. The unit also issues an alarm
of freezing risk at the controller. It is recommended to have e.g. a spring-actuated check valve (E) in the outdoor air duct (and possibly also in the exhaust air duct). This valve closes the duct from the
unit to outdoor air and prevents cold air from flowing into the unit while it is stopped. he base volume of water flow into the radiator of the unit can be adjusted with valves (S), which can also act as stop
valves. No water must be led into the radiator of the unit until the system has been adjusted for operation and heating is on in the heating network, or other measures have been taken to ensure that the
radiator will not freeze. Water circulation in the heating network connected to the unit and the circulation pump must not be stopped during the heating season.
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 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 (for example ELV05006,
Stig Wahlström).
Y Non-return valve, not included in the delivery.
R Stop valve, not included in the delivery.
S
Control 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, is included in the unit
delivery.
E Check 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.
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.
VALLOX 200 SE
HEAT PUMP
GROUND COLLECTOR
