Nibe S1255 - Dimensions and Pipe Connections

SYSTEM DIAGRAM
S1255 consists of heat pump, water heater, immersion
heater, circulation pumps and control system. S1255 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 the 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 3 7 2
4
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, brine inXL6
Connection, brine outXL7
Dimensions and pipe
connections
560 440
70
1800
650*
20-50
650*
600
60
135
210
390
465
540
25
622
622
600
560 440
70
1800
650*
20-50
25
60
135
210
390
465
540
650*
XL1 XL6 XL7XL4 XL3 XL2
PIPE DIMENSIONS
16
kW
12
kW
6
kW
Connection
2822(mm)(XL1)/(XL2) Heating medium supply/re-
turn ext. Ø
22(mm)(XL3)/(XL4) Cold/hot water Ø
28(mm)(XL6)/(XL7) Brine in/out ext. Ø
* Can be angled for side connection.
NIBE S1255Chapter 4 | Pipe connections14