General
Pipe installation must be carried out in accordance with
current norms and directives. S1155PC can operate with a
return temperature of up to 58 °C and an outgoing temper-
ature from the heat pump of 70 (65 °C with only the com-
pressor).
S1155PC is not equipped with external shut off valves; these
must be installed to facilitate any future servicing.
Caution
Ensure that incoming water is clean. When using
a private well, it may be necessary to supplement
with an extra water filter.
Caution
Any high points in the climate system, must be
equipped with air vents.
NOTE
The pipe systems need to be flushed out before
the heat pump is connected so debris cannot
damage component parts.
NOTE
Water may drip from the safety valve’s overflow
pipe. The overflow pipe must be routed to a suit-
able drain, so hot water splashes cannot cause
harm. The entire length of the overflow pipe must
be inclined to prevent water pockets, and must
also be frost-proof. The overflow pipe must be at
least the same size as the safety valve. The over-
flow pipe must be visible and its mouth must be
open and not placed close to electrical compon-
ents.
NOTE
The climate system must be adjusted for both
heating and cooling operation.
SYMBOL KEY
Meaning
Symbol
Unit box
Shut-off valve
Non-return valve
Mixing valve
Circulation pump
Expansion vessel
Filterball
Fan
Pressure gauge
P
Level vessel
Particle filter
Safety valve
Temperature sensor
Trim valve
Reversing valve/shunt
Manual reversing valve/shunt
Heat exchanger
Overflow valve
Bore hole
Ground collector
Under floor heating systems
Ground source heat pump
Pool
Radiator system
Domestic hot water
Hot water circulation
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Chapter 4 | Pipe connections
NIBE S1155PC
Pipe connections