Nibe VPB S Manual page 17

SYMBOL KEY
Symbol Meaning
Unit box
Shut-off valve
Non-return valve
Mixing valve
Circulation pump
Expansion vessel
Filterball
Shut off valve
P Pressure gauge
Safety valve
Temperature sensor
Pressure reduction valve
Manual reversing valve/shunt
Radiator system
Domestic hot water
Addition
Hot water circulation
NIBE VPB S/ VPBS S
TO HEAT PUMP
VPB S/ VPBS S can be docked with another heat source,
for example NIBE S1155.
• Install expansion vessel and pressure gauge as illus-
trated.
• Install the safety valve as illustrated. Recommended
opening pressure is 0.25 MPa (2.5 bar). For information
about max opening pressure, see technical specifica-
tions.
Before installing VPB S/ VPBS S in an existing system,
it is important for the system to be properly flushed
through.
Even if VPB S/ VPBS S is to be installed in a new sys-
tem, the heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed
from the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term
anti-corrosion protection.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
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Chapter 3 | For the Installer
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