Nibe S135, Installation Manual, Page: 12 / 36

General pipe
connections
Pipe installation must be carried out in accordance with
current norms and directives.
S135 is only designed for upright installation. All connec-
tions are equipped with smooth pipe for compression
ring couplings.
A safety valve must be installed in the system where
S135 is present.
Overflow water from the evaporator's collect-
ing trough is routed via the supplied plastic
hose to a drain. Shape the hose into a water
seal (see image).
The entire length of the overflow water pipe
must be inclined to prevent water pockets and
must also be frost-proof.
To make the installation energy efficient, NIBE recom-
mends that all pipes between S135 and the indoor
module are insulated. The insulation should be at least
12 mm thick.
NOTE
The pipe systems need to be flushed out be-
fore S135 is connected so that any debris
cannot damage component parts.
COMPATIBLE NIBE PRODUCTS
• VVM S325 • VVM S320
• SMO S40
SYMBOL KEY
Meaning Symbol
Unit box
Shut-off valve
Non-return valve
Circulation pump
Expansion valve
Fan
Compressor
Shut off valve
Particle filter
Temperature sensor
Reversing valve/shunt
Heat exchanger
Indoor module
Cooling system
Air/water heat pump
Pool
Ventilation
NIBE S135 Chapter 4 | Pipe and air connections 12
4 Pipe and air connections