Nibe S1155 Installer Manual page 15

SYMBOL KEY
Symbol Meaning
Unit box
Shut-off valve
Non-return valve
Mixing valve
Circulation pump
Expansion vessel
Filterball
Fan
Shut off valve
P Pressure gauge
Particle filter
Safety valve
Temperature sensor
Trim valve
Pressure reduction valve
Tundish
Reversing valve/shunt
Manual reversing valve/shunt
Heat exchanger
Overflow valve
Bore hole
Ground collector
Under floor heating systems
Heat pump
Cooling system
Pool
Radiator system
Domestic hot water
Hot water circulation
NIBE S1155
SYSTEM DIAGRAM
S1155 consists of heat pump, immersion heater, circu-
lation pumps and control system. S1155 is connected
to the brine and heating medium circuits.
In the heat pump evaporator, the brine (water mixed
with anti-freeze, glycol or ethanol) releases its energy
to the refrigerant, which is vaporised in order to be
compressed in the compressor. The refrigerant, of which
the temperature has now been raised, is passed to the
condenser where it gives off its energy to the heating
medium circuit and, if necessary, to any docked water
heater. If there is a greater need for heating/hot water
than the compressor can provide there is an integrated
immersion heater.
XL 1 6
XL1 Connection, heating medium flow
XL2 Connection, heating medium return
XL6 Connection, brine in
XL7 Connection, brine out
XL9 Connection, hot water heater
Chapter 4 | Pipe connections
9 7 2
15