SYSTEM DIAGRAM
S1155PC consists of heat pump, immersion heater, circula-
tion pumps and control system. S1155PC 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 re-
frigerant, 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.
The brine can also be circulated via a mixing valve to a heat
exchanger. There the brine cools the heating system's water
so that comfort cooling can be maintained during the hotter
periods of the year.
XL 1 6
9
7
2
Connection, heating medium flow
XL1
Connection, heating medium return
XL2
Connection, brine in
XL6
Connection, brine out
XL7
Connection, hot water heater
XL9
Dimensions and pipe
connections
600
55
135
390
465
540
622
560
725*
725*
440
70
1
500
20-50
25
600
55
135
390
465
540
622
25
560
725*
725*
440
70
1
500
20-50
XL1
XL6
XL7
XL9
XL2
PIPE DIMENSIONS
6
kW
Connection
22
(mm)
(XL1)/(XL2) Heating medium supply/return ext. Ø
22
(mm)
(XL9) Connection water heater ext. Ø
28
(mm)
(XL6)/(XL7) Brine in/out ext. Ø
* Can be angled for side connection.
NIBE S1155PC
Chapter 4 | Pipe connections
12