Nibe S735 User manual

Installer manual
Exhaust air heat pump
NIBE S735 1x230 V
IHB EN 2220-1
531809

Quick guide
NAVIGATION
Browse
ScrollSelect The dots at the bottom
edge show that there
are more pages.
If the menu has several
sub-menus, you can
see more information
by dragging up or down
with your finger.
Most options and func-
tions are activated by
lightly pressing on the
display with your finger.
Drag to the right or left
with your finger to
browse between the
pages.
Setting the indoor temperature.
13.45 3 October
Climate system 1
Offset
Heating
Smartguide
Hi!
Your system is working properly. Do you want help making
changes?
Yes please, take me to Smartguide.
October13.45 3
Here, you can set the temperature in the installation's zones.Smartguide helps you both to view information about the current
status and to make the most common settings easily. The inform-
ation that you see depends on the product you have and the ac-
cessories that are connected to the product.
Product overview
Company AB
Phone number
S735
01234567890123
1.0.0
Product
overview
Product name
Serial number
Software
Service
October13.45 3
Update
Increasing hot water temperature
13.45 3 October
More hot water
Hot water
Here, you can find information about product name, the product's
serial number, the version of the software and service. When there
is new software to download, you can do it here (provided that
S735 is connected to myUplink).
Here, you can start or stop a temporary increase in the hot water
temperature.

41 Important information
4Safety information
4Symbols
4Marking
4Serial number
4Country specific information
6Inspection of the installation
72 Delivery and handling
7Transport
7Assembly
8Supplied components
8Handling panels
10Removing insulation
10Separated/one unit
113 The heat pump design
11General
13Distribution boxes
13Air treatment section
144 Pipe and ventilation connections
14General pipe connections
16Dimensions and pipe connections
17Symbol key
17Climate system
17Cold and hot water
18Installation alternative
19General ventilation connection
19Ventilation flow
20Adjusting ventilation
20Dimension and ventilation connections
215 Electrical connections
21General
23Connections
28Settings
296 Commissioning and adjusting
29Preparations
29Filling and venting
30Start-up and inspection
31Setting the heating curve
347 myUplink
34Specification
34Connection
34Range of services
358 Control - Introduction
35Display unit
36Navigation
36Menu types
38Climate systems and zones
399 Control - Menus
39Menu 1 - Indoor climate
43Menu 2 - Hot water
45Menu 3 - Info
46Menu 4 - My system
49Menu 5 - Connection
50Menu 6 - Scheduling
52Menu 7 - Installer settings
5810 Service
58Maintenance
59Service actions
6211 Disturbances in comfort
62Info-menu
62Manage alarm
62Troubleshooting
6512 Accessories
6613 Technical data
66Dimensions and setting-out coordinates
68Technical specifications
70Energy labelling
72Electrical circuit diagram
79Item register
3Table of ContentsNIBE S735
Table of Contents

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
Symbols
Explanation of symbols that may be present in this manual.
WARNING!
This symbol indicates serious danger to person or
machine.
NOTE
This symbol indicates danger to person or machine.
Caution
This symbol indicates important information about
what you should consider when installing or servi-
cing the installation.
TIP
This symbol indicates tips on how to facilitate us-
ing the product.
Marking
Explanation of symbols that may be present on the product’s
label(s).
Fire hazard!
Read the User Manual.
Read the Installer Manual.
Disconnect the voltage supply before starting work.
Dangerous voltage.
Serial number
The serial number can be found at the bottom right on S735,
in the display on the home screen "Product overview" and
on the type plate (PZ1).
Caution
You need the product's (14 digit) serial number for
servicing and support.
Country specific information
UNITED KINGDOM
This installation is subject to building regulation approval,
notify the local Authority of intention to install.
Use only manufacturer’s recommended replacement parts.
For more information see nibe.co.uk.
Benchmark places responsibilities on both manufacturers
and installers. The purpose is to ensure that customers are
provided with the correct equipment for their needs, that it
is installed, commissioned and serviced in accordance with
the manufacturers instructions by competent persons and
that it meets the requirements of the appropriate Building
Regulations. The Benchmark Checklist can be used to
demonstrate compliance with Building Regulations and
should be provided to the customer for future reference.
Installers are required to carry out the installation, commis-
sioning and servicing work in accordance with the Bench-
mark Code of practice which is available from the Heating
and Hotwater Industry Council who manage and promote
the Scheme. Visit centralheating.co.uk for information.
Warranty and insurance information
Thank you for installing a new NIBE heat pump in your home.
NIBE heat pumps are manufactured in Sweden to the very
highest standard so we are pleased to offer our customers
a comprehensive guarantee.
NIBE S735Chapter 1 | Important information4
Important information

The product is guaranteed for 24 months for parts and la-
bour from the date of installation or 33 months from the
date of manufacture, whichever is the shorter.
The NIBE guarantee is based on the unit being installed and
commissioned by a NIBE accredited installer, serviced every
year and the Benchmark documents completed. Where this
condition is not met, any chargeable spare parts or compon-
ents issued within the applicable guarantee period still be-
nefit from a 12 month warranty from the date of issue by
the manufacturer.
We recommend the installer completes and returns as soon
as possible, your guarantee registration card or completes
the guarantee form on the NIBE website www.nibe.co.uk
Electrical Supply
The heat pump must be permanently connected to a 230 V
~ 50 Hz supply.
All system components shall be of an approved type and all
wiring to current I.E.E wiring regulations.
External wiring must be correctly earthed, polarised and in
accordance with the relevant standards: Currently this is
BS 7671.
Domestic Hot Water
All domestic hot water circuits, connections and fittings
must be in accordance with the relevant standards and
water supply regulations. It should also be in accordance
with the relevant requirements of the Local Authority and
the Building Regulations relevant to the location of installa-
tion.
BS 8558:2015 Services supplying water for domestic use
within buildings and their cartilages.
Water Supply (Water Fitting) Regulations 1999 or The Water
Bylaws 2000 (Scotland).
Heating System
The installation of the heat pump should follow best practice
as covered in the following:
BS 5449 Forced circulation hot water central heating sys-
tems for domestic premises.
BS 15450 Heating systems in buildings – Design of heat
pump heating systems.
Ventilation System
Any ventilation system should be designed and installed in
accordance with Building Regulations, England & Wales Ap-
proved Document F1 and Scotland Technical Standard
Section 3.14 Ventilation. Only this will ensure hygienic room
air and prevent any dampness to the building structure.
To be able to ensure a high degree of efficiency and an ex-
tremely comfortable living environment, we recommend
that the installation of any ventilation system should be
planned and this plan be strictly followed by the ventilation
engineer.
The discharge air duct work to outside must be insulated to
ensure condensation does not form in the duct work.
5Chapter 1 | Important informationNIBE S735

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must be
carried out by a suitably qualified person. In addition, fill in the page for the installation data in the User Manual.
DateSignatureNotesDescription
✔
Ventilation (page 19)
Outdoor air damper
Setting ventilation flow exhaust air
Setting the ventilation flow outdoor air
Connecting ground cables
Heating medium (page 17)
System flushed
System vented
Pressure in the climate system
Hot water (page 17)
Mixing valve
Expansion vessel
Tundish
Electricity (page 21)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Safety breaker
Earth circuit-breaker
Miscellaneous
Benchmark checklist
NIBE S735Chapter 1 | Important information6

Transport
S735 should be transported and stored vertically in a dry
place.
Ensure that the heat pump cannot fall over during transport.
R
0
R
0
Check that S735 has not been damaged during transport.
However, the S735 can be carefully laid on its back when
being moved into the building. The centre of gravity is in the
upper part.
Assembly
•Place S735 on a solid foundation indoors that can take the
heat pump’s weight.
Use the product’s adjustable feet to attain a horizontal
and stable set-up.
30 - 50 mm
30 - 50 mm
15 - 40 mm
20-55 mm
•Because water comes from S735, the floor coating is im-
portant. A waterproof floor or floor membrane is recom-
mended.
•Because water comes from S735, it is good if the area
where the heating pump is located is provided with floor
drainage.
•Install with its back to an outside wall, ideally in a room
where noise does not matter, in order to eliminate noise
problems. If this is not possible, avoid placing it against a
wall behind a bedroom or other room where noise may be
a problem.
•Wherever the unit is located, walls to sound sensitive
rooms should be fitted with sound insulation.
•Route pipes so they are not fixed to an internal wall that
backs on to a bedroom or living room.
•The heat pump's installation area should always have a
temperature of at least 10 °C and max 30 °C.
INSTALLATION AREA
Leave a free space of 800 mm in front of the product. Leave
free space between S735 and wall/other machinery/fit-
tings/cables/pipes etc. It is recommended that a space of
at least 10 mm is left to reduce the risk of noise and of any
vibrations being propagated.
800
NOTE
Ensure that there is sufficient space (300 mm)
above S735 for connecting ventilation ducts.
7Chapter 2 | Delivery and handlingNIBE S735
Delivery and handling

Supplied components
Room sensor(BT50)Outdoor temperature sensor
(BT1)
LEK
Vent hose
(length 4 m)
Earth cabling (2 pcs)
Label for external control
voltage for the control sys-
tem
Extra air filter
LEK
LEK
Gasket2 x tundish (WM3)
LEK
LEK
Outdoor air mixing OEK S20Expansion vessel (CM4) with
holder
(enclosed separately)
(supplied separately)
LOCATION
The kit of supplied items is placed on top of the product.
Handling panels
OPEN FRONT HATCH
Press the hatch's top left corner to open it.
REMOVE THE AIR TREATMENT UNIT’S HATCH
Remove the upper panel by pulling it straight out.
REMOVE THE FRONT
1. Remove the screw in the hole next to the on/off button
(SF1).
2. Pull the panel's top edge towards you and lift diagonally
upwards to remove it from the frame.
UN
NIBE S735Chapter 2 | Delivery and handling8

ASSEMBLE THE FRONT
1. Hook one bottom corner of the front onto the frame.
2. Hook the other corner in place.
3. Check the display is straight. Adjust if necessary.
4. Press the top of the front section against the frame and
screw it into place.
REMOVE SIDE PANEL
The side panels can be removed to facilitate the installation.
1. Remove the screws from the upper and lower edges.
UN
2. Twist the panel slightly outwards.
UN
9Chapter 2 | Delivery and handlingNIBE S735

3. Move the panel outwards and backwards.
UN
4. Assembly takes place in the reverse order.
Removing insulation
The insulation can be removed to make installation easier.
Separated/one unit
S735 is delivered as a unit and can be installed as one unit
or separately. For separate installation, the accessory DKI
S10 is required.
The images in this manual show S735 installed as one unit.
UN
Separated installationOne unit
NIBE S735Chapter 2 | Delivery and handling10