Nibe S735 - Installation Alternative

Installation alternative
S735 can be installed in several different ways, some of
which are shown here.
Further option information is available at nibe.co.uk and in
the respective assembly instructions for the accessories
used. See page 65 for a list of the accessories that can be
used with S735.
EXTRA CLIMATE SYSTEM
In buildings with several climate systems that require differ-
ent supply temperatures, the accessory ECS 40/ECS 41 can
be connected.
A shunt valve then lowers the temperature to the underfloor
heating system, for example.
-EP21-GP10-EP21-BT2
-EP21-AA25
-EP21-BT3
-EP21-QN25
-EP21
EXTRA HOT WATER HEATERS
The system should be supplemented with an extra water
heater, if a large bath tub or other significant consumer of
hot water is installed.
Water heater without immersion heater
In water heaters without an immersion heater, the water is
heated by the heat pump.
The water heater’s flow is connected before S735.
Some water heaters require pipe routing behind the units,
which requires 60 mm of free space to the wall.
For connection, a docking kit DEW is required.
DEW S42 means that S735 can be connected to the water
heater VPB S200.
DEW S43 means that S735 can be connected to the water
heater AHPH S/AHPS S.
Water heater with immersion heater
In a water heater with an immersion heater, the water is
initially heated by the heat pump. The immersion heater in
the water heater is used for keeping warm and when the
heat pump does not have sufficient power.
The water heater’s flow is connected after S735.
HOT WATER CIRCULATION
A circulation pump can be controlled by S735 to circulate
the hot water. The circulating water must have a temperat-
ure that prevents bacterial growth and scalding, and national
standards must be satisfied.
The HWC return is connected to a freestanding water heater.
The expansion vessel (CM4) that is enclosed S735 may need
to be replaced with a larger one.
The circulation pump is activated via the AUX output in menu
7.4 -"Selectable in/outputs".
-QZ1-FQ3
-QZ1-GP11
-QZ1-RM1
-QZ1-RN1
-QZ1
NIBE S735Chapter 4 | Pipe and ventilation connections18