Caution
Ensure that incoming water is clean. When using
a private well, it may be necessary to supplement
with an extra water filter.
NOTE
Any high points in the climate system, must be
equipped with air vents.
NOTE
The pipe systems need to be flushed out before
the indoor module is connected so that any debris
cannot damage component parts.
NOTE
Do not start the system before filling up with wa-
ter. Components in the system could be damaged.
SYSTEM VOLUME
VVM S320 is equipped with an expan-
sion vessel (CM1).
The volume of the expansion vessel
is 10 litres and it is pre-pressurised as
standard to 0.5 bar. As a result, the
maximum permitted height "H"
between the expansion vessel and the
highest installed radiator is 5 m, see
figure.
If the pre-pressure is not high enough,
it can be increased by filling with air via the valve in the ex-
pansion vessel. Any change in the pre-pressure affects the
ability of the expansion vessel to handle the expansion of
the water.
The maximum system volume, excluding VVM S320, is 220
litres at the above-mentioned pre-pressure.
SYMBOL KEY
MeaningSymbol
Shut-off valve
Tapping valve
Non-return valve
Mixing valve
Circulation pump
Immersion heater
Expansion vessel
Filterball
Flow meter/energy meter
Safety valve
Trim valve
Reversing valve/shunt
Overflow valve
Under floor heating systems
Air/water heat pump
Radiator system
Domestic hot water
Hot water circulation
NIBE VVM S320Chapter 4 | Pipe connections14
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