Connecting to air/water heat
pump
You can find a list of compatible air/water heat pumps in
section "Compatible air/water heat pumps".
Caution
Also, consult the Installer Manual for your air/water
heat pump.
Install as follows:
• pressure relief valve
Some heat pump models have a factory-fitted safety
valve.
• drain valve
For draining the heat pump during prolonged power fail-
ures. Only for heat pumps that do not have a gas separat-
or.
• non-return valve
A non-return valve is only required in those installations
where the placement of the products in relation to each
other can cause self-circulation.
If the heat pump is already fitted with a non-return valve,
there is no need to install another.
• shut-off valve
To facilitate any future servicing.
• filterball or particle filter
Installed before connection "heating medium return" (XL2)
(the lower connection) on the vacuum pump.
In installations with a particle filter, the filter is combined
with an additional shut-off valve.
Use without heat pump
Connect the pipe for docking in from the heat pump (XL8)
with the pipe out to the heat pump XL9.
Select "Add. heat only" in menu 4.1 - "Operating mode".
Enter menu 7.3.2 - "Installed heat pump" and deactivate the
heat pump.
Also see section "Commissioning without heat pump".
Climate system
A climate system is a system that regulates the indoor
temperature with the help of the control system in VVM S320
and, for example, radiators, underfloor heating, underfloor
cooling, fan coils, etc.
CONNECTING THE CLIMATE SYSTEM
Install as follows:
• When connecting to a system with thermostats on all ra-
diators/underfloor heating coils, either a bypass valve
must be fitted or some of the thermostats must be re-
moved to ensure there is sufficient flow and heat emission.
17Chapter 4 | Pipe connectionsNIBE VVM S320