Nibe S735 - Symbol Key; Climate System; Cold and Hot Water

Symbol key
MeaningSymbol
Unit box
Non-return valve
Mixing valve
Circulation pump
Immersion heater
Temperature sensor
Trim valve
Reversing valve/shunt
Overflow valve
Under floor heating systems
Radiator system
Domestic hot water
Hot water circulation
Heat pump
Climate system
A climate system is a system that regulates the indoor
temperature with the help of the control system in S735
and, for example, radiators, underfloor heating, fan coils,
etc.
CONNECTING THE CLIMATE SYSTEM
Install as follows:
• When connecting to a system with thermostats on all ra-
diators/underfloor heating coils, either a bypass valve
must be fitted or some of the thermostats must be re-
moved to ensure there is sufficient flow and heat emission.
XL1
XL2
Cold and hot water
The settings for hot water are made in menu 7.1.1 - "Hot
water".
Stop temperature for hot water must be at least 60°C.
CONNECTING COLD AND HOT WATER
Install as follows:
• shut-off valve
• mixing valve
A mixing valve must be installed when the factory setting
for hot water is changed. National regulations must be
observed.
• enclosed expansion vessel (CM4)
The expansion vessel (CM4) accommodates expansion
that results from heating the water inside the unit. The
expansion vessel must be connected between the expan-
sion relief valve (FL1) and the water heater. The location
of the expansion vessel should allow access to recharge
the pressure when neccessary.
• enclosed tundish (WM3)
XL3
XL4
XL29
17Chapter 4 | Pipe and ventilation connectionsNIBE S735