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-EP21-GP10 -EP21- B T2 -EP 21 - AA2 5 -EP21- B T3 -EP21-QN25 -EP21 - AZ20 _ S AM XL 2 8 1 9 - AZ20 _ D WS XL 2 37 1 36 XL 2 8 1 3 4 9 -QZ 1 -F Q 3 -QZ1-GP11 -QZ 1 -RM 1 -QZ1-RN1 -QZ1 -CP4 -EB100 - B T1 -EB100 4 3 1 XL 2 -EB100 - B T1 -EB100 4 3 1 XL 2 4 3 1 XL 2 -EB100 - B T1 -EB100 4 3 1 XL 2 -EB100 - B T1 -EB100 -EB100 - B T1 -EB100 4 3 1 XL 2 4 3 1 XL 2 -EB100 - B T1 -EB100 -QZ 1 -F Q 3 -QZ1-GP11 -QZ 1 -RM 1 -QZ1-RN1 -QZ1 5 - WP5 - AA25 _S42 - WP5 -QN28 _S42 - WP5-RM1 _S42 - WP5-QM35 _S42 - WP5 _S42 - WP5 - B T7 _S42 - WP5 - B T6 _S42 -CP1 _VPB -CP1 _AHP - WP5 -QN28 _S43 - WP5-QM35 _S43 - WP5 _S43 - WP5-FQ1 _S43 - WP5 - AA25 _S43 - WP5-RM1 _S43 - WP5 - B T7 _S43 - WP5 - B T6 _S43 -CP1 _VPBS - WP5 -QN28 _S43 - WP5-QM35 _S43 - WP5 _S43 - WP5-FQ1 _S43 - WP5 - AA25 _S43 - WP5-RM1 _S43 - WP5 - B T7 _S43 - WP5 - B T6 _S43 -EB100-GP10 -RM1 -EB100- B T25 -GC1

Protective and safety equipment as well as components that facilitate servicing (e.g. non-return valves, safety valves, overflow valves, shut-off valves) must be installed in accordance with national regulations and standards.

Docking-ComponentNotesTitle

[Docking-ComponentNotesParagraph]

Function

Heat pump

The compressor in a S735 is inverter-controlled. The compressor’s power is adjusted according to the demand and routed to heating or hot water. If the power is not sufficient for the heating demand, additional heating is connected automatically.

Operating modes

Heat production

S735 is supplied with a heating control system, which means that the heating supply to the house takes place according to selected settings. When connecting to a system with thermostats on all radiators (or underfloor heating coils), either a bypass valve must be fitted or some of the thermostats must be removed to ensure there is sufficient flow. For more information about heat production, see the Installer Manual.

Hot water production

S735 consists of a storage heater that is heated with a charge coil.

When there is demand for hot water, S735 prioritises this and switches to hot water mode. There is no heat production in this mode.

For more information about hot water production, see the manual for S735.

Functions/accessories

Heating system 2

This function requires the ECS 40/41 accessory. Shunt valve, supply and return line sensors, as well as circulation pump, are connected to other heating circuits with a lower temperature demand (e.g. underfloor heating system). The temperature in the extra heating system follows the selected curve slope and offset setting. Up to 8 extra heating systems can be connected to the installation.

For further information, see the Installer Manual for the accessory.

See the valve’s manual for a port description.

External heating medium pump

With the AXC 20 accessory, an external heating medium pump can be connected to S735, if the alarm relay (the AUX output) is activated for another function.

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.

Docking kit DEW S42

In houses with a large hot water demand, VPB S200 can be docked to NIBE S735. Docking kit DEW S42 is required.

For further information, see the Installer Manual for the accessory.

Docking kit DEW S43

In houses with a large hot water demand, AHPH S eller AHPS S can be docked to NIBE S735. Docking kit DEW S43 is required.

Together with AHPS S, the accessory can also be used when docking with an external heat source, such as a water jacketed stove or a thermal solar installation.

For further information, see the Installer Manual for the accessory.

Solar panels

This function requires the NIBE PV accessory. NIBE PV is a complete modular system with solar panels in several basic outputs. NIBE PV is connected to S735, which adjusts to the generated solar electricity produced.

For further information, see the Installer Manual for the accessory.

Supply air module

NIBE SAM S42/S44 is a supply air module specially designed to combine recovery of mechanical exhaust air with preheated supply air together with the exhaust air pump NIBE S735.

The integrated fan in NIBE SAM S42/S44 takes the exhaust air and blows it out into the house via the supply air inlet. The supply air is warmed as needed.

For further information, see the Installer Manual for the accessory.

Hot water circulation

A circulation pump can be controlled by S735 to circulate the hot water. The circulating water must have a temperature that prevents bacterial growth and scalding, and national standards must be satisfied. See the appropriate Installer Manual for more information.

List of components

Designation

Name

Specification

Part No.

Comments

-EB100

Heat pump system

NIBE S735

-EB100-BT1

Outside sensor

Included in S735

-EB100-BT25

External supply temperature sensor

-EB100-GP10

External heating medium pump

XL

XL connections

1

Heating medium connection, supply

2

Heating medium connection, return

3

Cold water connection

4

Hot water connection

5

Hot water circulation connection

8

Docking connection, supply (from heat pump)

9

Docking connection, return (to heat pump)

-AZ20_DWS

Supply air module

DWS S42

067 872

-AZ20_SAM

Supply air module

NIBE SAM S42/S44

067 794 / 067 795

-CP1_VPB

Storage tank

VPB S200

081 141

-CP1_VPBS

Storage tank

VPB S300 / VPBS S300

081 143 / 081 145 / 081 146

-CP1_AHP

Storage tank

AHPS S / AHPH S

080 136 / 080 137

-CP4

Additional water heater

-WP5_S42

Docking kit DEW S42

067 796

-WP5-AA25_S42

AXC module

Included in DEW S42

-WP5-BT6_S42

Controlling hot water sensor

Included in DEW S42

-WP5-BT7_S42

Display hot water sensor

Included in DEW S42

-WP5-FQ1_S42

Mixer valve, hot water

Included in DEW S42

-WP5-QM35_S42

Shut-off valve, cold water

Included in DEW S42

-WP5-QN28_S42

Reversing valve, hot water

Included in DEW S42

-WP5-RM1_S42

Non-return valve

Included in DEW S42

-WP5_S43

Docking kit DEW S43

067 800

-WP5-AA25_S43

AXC module

Included in DEW S43

-WP5-BT6_S43

Controlling hot water sensor

Included in DEW S43

-WP5-BT7_S43

Display hot water sensor

Included in DEW S43

-WP5-FQ1_S43

Mixer valve, hot water

Included in DEW S43

-WP5-QM35_S43

Shut-off valve, cold water

Included in DEW S43

-WP5-QN28_S43

Reversing valve, hot water

Included in DEW S43

-WP5-RM1_S43

Non-return valve

Included in DEW S43

-EP21

Heat pump system 2

ECS 40/41

067 287 / 067 288

-EP21-AA25

AXC module

Included in ECS 40/41

-EP21-BT2

Supply temperature sensor, heating system 2

Included in ECS 40/41

-EP21-BT3

Return line sensor, heating system 2

Included in ECS 40/41

-EP21-GP10

Circulation pump, heating system 2

Included in ECS 40/41

-EP21-QN25

Shunt valve, heating system 2

Included in ECS 40/41

See the valve’s manual for a port description.

-GC1

Solar panels

NIBE PV

-QZ1

Hot water circulation (HWC)

-QZ1-FQ3

Mixer valve, HWC

-QZ1-GP11

Circulation pump, HWC

-QZ1-RM1

Non-return valve, HWC

-QZ1-RN1

Trim valve, HWC

-RM1

Miscellaneous

-RM1

Non-return valve

Designations according to standard EN 81346-2.

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