Bosch Worcester Greenstar HIU User manual

UK
User instructions
Heat Interface Unit
Greenstar HIU, HIU E, HIU E Plus & HIU KE Plus
6720810422-00.1Wo
For connection to a district heating system supplying heating and domestic hot water
6 720 810 422 (2015/05)

2
Preface
Greenstar HIU – 6 720 810 422 (2015/05)
Preface
Please read these instructions carefully
These instructions are applicable to the Worcester, Bosch
Group HIU stated on the front cover only.
These instructions apply in the UK/IE only and must be followed
except for any statutory obligation.
After installation please leave this User Instruction Manual,
Installation, Commissioning and Servicing Instructions and
completed Benchmark Checklist with the user.
Dedicated to heating comfort
Thank you for purchasing a Greenstar Heat Interface Unit
manufactured by Worcester, Bosch Group. The company
prides itself on manufacturing appliances to the strictest
quality control standards throughout every stage of
production.
Worcester, Bosch group has led the field in innovative heating
and hot water appliance design and performance for 50 years.
This heritage means all our products are of exceptional quality
and proven reliability.
The Greenstar range in particular is extremely energy efficient,
offering you economical running costs and value for money.
There is also the reassurance of our no-nonsense 2 years parts
and labour guarantee.
Contents
1 Key to symbols and safety instructions . . . . . . . . . . . 3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . 3
2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Appliance identification and serial number . . . . . 4
2.2 Maintaining your appliance . . . . . . . . . . . . . . . . . . 4
3 Integral heat meter display (if fitted) . . . . . . . . . . . . 5
4 Integral heat meter menu (if fitted) . . . . . . . . . . . . . . 6
5 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 Maintenance clearances . . . . . . . . . . . . . . . . . . . . 8
5.2 Compartment clearances . . . . . . . . . . . . . . . . . . . 8
6 Your guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Fault or breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Environment/disposal . . . . . . . . . . . . . . . . . . . . . . . . 11
9 Tips on energy saving . . . . . . . . . . . . . . . . . . . . . . . . . 11

3
Key to symbols and safety instructions
Greenstar HIU – 6 720 810 422 (2015/05)
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this
document:
•NOTICE indicates a situation that could resultin damage to
property or equipment.
•CAUTION indicates a situation that could result in minor to
medium injury.
•WARNING indicates a situation that could result in severe
injury or death.
•DANGER indicates a situation that will result in severe
injury or death.
Important information
Additional symbols
Examples of additional symbols used
A numbered step in an action sequence
A sequence of numbered steps or actions carried out in a
specific order to complete a task.
1. First action
2. Second action
3. Third action
etc.
A step in an action sequence
A sequence of defined actions or steps carried out in order to
complete a task.
▶Action
▶Nextaction
▶etc
A reference to a related part in the document or to other
related documents.
To refer the reader to a specific figure/table/section within the
manual.
e.g. figure 1.
A reference number to identify or refer to a part or item.
In a related figure, items or parts identified by a sequential
number.
List entries, first and second levels
• A single component/item
• A component/list, made up of multiple parts/items.
– Sub component or sublist of main component/list.
–etc.
1.2 Safety precautions
Combustible and corrosive materials:
Chemically aggressive substances can corrode the appliance
and invalidate any guarantee.
• Do not store or use any combustible materials (paper,
thinners, paints, propellants, cleaning agents etc.) inside
the cupboard containing the appliance or within the vicinity
of the appliance.
Fittings and modifications:
Only a competent engineer can remove the appliance case and
carry out any work.
• Do not remove the appliance case.
Any misuse or unauthorised modifications to the appliance or
associated accessories and heating system will invalidate the
guarantee.
• Do not modify the appliance in any way.
Worcester, Bosch Group accepts no liability arising from any
such actions. This does not affect your statutory rights.
Cleaning the appliance case:
Use a damp, soft cloth to clean the outer painted metal case of
the appliance, do not use chemicals or abrasive materials.
Safety instructions in this document are
framed and identified by a
warning triangle which is printed on a grey
background.
This symbol indicates important information
where there is no risk to people or property.
Symbol Meaning
1. a numbered step in an action sequence
▶ a step in an action sequence
a reference to a related part in the document or to
other related documents
a reference number to identify or refer to a part or
item
•alistentry
– a list entry (second level)
Table 1
1

4
General information
Greenstar HIU – 6 720 810 422 (2015/05)
2 General information
The appliance provides domestic hot water and central heating
to properties that are serviced from district heating or central
boiler plants. The appliance consists of two heat exchangers,
one for the domestic hot water providing instant hot water at a
safe regulated temperature and the second for central heating.
The appliance is indirect so the primary heating circuit is
hydraulically separated from the property central heating by
the second plate heat exchanger. Domestic hot water takes
priority over the central heating demand.
This appliance must only be used as a source of heating and hot
water in a sealed system.
2.1 Appliance identification and serial number
The data label [1] contains information of the appliance model
and serial number. this is located on the bottom centre of the
cover panel.
Fig. 1 Data label location
For your own records
Please ensure that the Commissioning Checklist has been
completed by your installer or service engineer.
2.2 Maintaining your appliance
Your new appliance represents a long term investment in a
reliable, high quality product.
Wipe the appliance casing with a soft clean cloth. Please do not
use chemical cleaning products which may damage the paint
finish.
In order to realise its maximum working life, and to ensure it
continues to operate at peak efficiency and performance, it is
essential that when your appliance requires maintenance that
it is carried out by a competent person.
6720810422-03.1Wo
1
Model:
Serial number 1):
1) See appliance identification label on appliance casing
(shown in figure 1) or Commissioning Checklist at the end
of the commissioning section in the Installation,
Commissioning & Servicing Instructions.
Date of installation:
Table 2 Appliance details

5
Integral heat meter display (if fitted)
Greenstar HIU – 6 720 810 422 (2015/05)
3 Integral heat meter display (if fitted)
Fig. 2 Integral heat meter display
Item Description Item Description
1Opticalsensor
•Notused
7 Cooling use
•Notused
2 Monthly value index
• When displayed, shows the month that the values on
the display are recorded for.
– Displays previous 1 - 18 months
8 Additional pulse input 1 & 2
•Notused
3 Flow temperature
• Displays when showing flow temperature in service
level menu
9 Impellor wheel in operation
• Displays when a demand is active
4Returntemperature
• Displays when showing return temperature in
service level menu
10 Units
• Displays units of measure
5 Communication
•Notused
11 Navigation button
• Cycles through menu structure
6 Service level
• Displays when in service level menu
Table 3
6720810422-01.1Wo
5 6 87321 9 1110
4

6
Integral heat meter menu (if fitted)
Greenstar HIU – 6 720 810 422 (2015/05)
4 Integral heat meter menu (if fitted)
The heat meter display allows the energy [1], set day [2],
volume [3], service [4] and error codes [5] to be displayed.
The default display screen is the Energy display.
To access the different top level displays:
▶ Press the navigation button [11], figure 46 to cycle
through the following categories:
•Energy [1], figure 3.
– Current energy usage, initial category screen display,
also default screen.
– The last 18 months of recorded energy values.
•Set day [2], figure 3.
– Current day, initial category screen display.
– The Energy for the day.
– The Volume for that day.
•Volume [3], figure 3.
– Current volume usage, initial category screen display.
– The last 18 months of recorded volume values.
•Service [4], figure 3.
– Flow meter mounting position, initial category screen
display.
– Identification number.
–Hightemperature.
– Low temperature.
– Delta temperature.
–Actualflow.
–Actualpower.
–Timeofdevice.
–Dateofdevice.
– Running hours.
–Softwareversion.
–LCDtest.
•Error [5], figure 3.
–Errorcode.
▶ To enter the category required press and hold the
navigation button for approximately 2 seconds.
▶ To cycle through the displayed data press the navigation
button repeatedly.
Once all the data has been displayed for the category the
display will move to the error display before returning to
the default display screen of Energy [1], figure 3.
After 3 minutes, the display automatically returns to the default
Energy screen.

7
Integral heat meter menu (if fitted)
Greenstar HIU – 6 720 810 422 (2015/05)
Fig. 3 Menu structure
6720810422-02.1Wo
1
2
3
4
5
>2 s
>2 s
>2 s
>2 s
>2 s

8
Clearances
Greenstar HIU – 6 720 810 422 (2015/05)
5 Clearances
Your installer will have provided adequate space around the
appliance for safety and maintenance access.
5.1 Maintenance clearances
Fig. 4 Minimum maintenance clearances
5.2 Compartment clearances
If the appliance is to be fitted in a compartment, the following
minimum clearances for the compartment dimensions apply.
This is in addition to the normal maintenance clearances.
Fig. 5 Compartment clearances
CAUTION: Restricted space
The appliance may overheat.
▶ Do not restrict this space with addition of
cupboards, shelves etc. next to or around
the appliance.
Minimum maintenance clearances
Description Dimensions (mm)
1 Overall clearance height 930
2 Overall clearance depth 870
3 In front of appliance 600
4 Overall clearance width 450
5 Above the appliance 30
6 Either side of the appliance 5
7Belowtheappliance 200
Table 4
6720808928-26.1Wo
CAUTION: Compartment ventilation
The appliance may overheat.
▶ Do not restrict or block the vents in the
front of the compartment.
Minimum compartment maintenance clearances
Description Dimensions (mm)
1 Compartment height 930
4 Compartment width 450
5Abovetheappliance 30
6 Either side of the appliance 5
7 Below the appliance 200
8 Compartment depth 290
9 Appliance to removable door 20
Table 5
6720808928-27.1Wo

9
Your guarantee
Greenstar HIU – 6 720 810 422 (2015/05)
6 Your guarantee
This appliance has a guarantee against faulty materials or
workmanship from the date of installation subject to the
following terms and conditions:
• During the period of this guarantee any components of the
appliance which are proven to be faulty or defective in
manufacture will be exchanged or repaired free of charge
by Bosch Thermotechnology Ltd.
• The householder may be asked to prove the date of
installation, that the appliance was correctly
commissioned and, where appropriate, the first year's
service has been carried out to the satisfaction of Bosch
Thermotechnology Ltd., when requested.
These should be documented as a part of the
Commissioning Checklist.
• The appliance has been used only for the normal domestic
purposes for which it was designed.
This guarantee does not affect your statutory rights.
Guarantee registration
Your appliance carries a guarantee against faulty material or
manufacturer subject to Terms and Conditions.
To read the full Terms & Conditions please visit us on-line at
www.worcester-bosch.co.uk/guarantee. The Guarantee
Registration form is available on this same page and can be
completed and submitted electronically.
Guarantee Registration can be completed:
• Via the Worcester, Bosch Group guarantee app:
– By scanning the appliance label QR code, all the
appliance information is populated in the app, so you
just need to fill out the property and installer details.
• On-line:
– You can register on our website:
www.worcester-bosch.co.uk/guarantee.
•Bypost:
– Fill out the guarantee card and return it to Worcester,
Bosch Group.
• By telephone:
– Please call one of our Guarantee Registration advisors
on 0330 123 9559.
The guarantee app can be downloaded to your
smart device from Apple iTunes, Google Play
or via the Worcester, Bosch Group website

10
Fault or breakdown
Greenstar HIU – 6 720 810 422 (2015/05)
7 Fault or breakdown
If you believe there is an problem with your central heating and
hot water supply, in the first instance it is advised to contact
your local warden/site agent/contractor, to ensure there are no
faults with either the district heating supply, centralised heat
source, external electrical components or any other of the
household services to the HIU.
Basic checks
Some items to check before placing a call are:-
• Is the electrical power switched on to the HIU?
• Is the external programmer calling for heat?
• Is the cold water main turned on?
• Is the heat network for the building operating (do your
neighbours have heat)?
Details of your local contact should be available below.
Local warden/site agent/contractor engineer
If a fault or breakdown occurs, contact the local warden/site
agent/contractor engineer.
Worcester, Bosch Group
The appliance is supported in the UK and Eire by Worcester,
Bosch Group.
Specialist service engineers are available to attend a
breakdown occurring on this appliance.
• No charge will be made for parts and/or labour providing:
The appliance fault is found and the appliance is within the
guarantee period. Reasonable evidence of this must be
supplied on request. i.e. the Commissioning Checklist.
• A call-out charge will be made where:
– The appliance is outside the guarantee period.
– Our Field Service Engineer finds no fault with the
appliance.
– The cause of breakdown is misuse or with other parts of
your plumbing/heating system, or with equipment not
supplied by Worcester, Bosch Group.
In the event of a appliance fault or breakdown please contact
Worcester, Bosch Group appointments team on 0330 123
9339. Your advisor will arrange for an engineer to call with the
minimum of delay; under normal circumstances this will be
from 1 - 3 working days (excluding weekends and bank
holidays) for priority breakdown situations (no hot water and/
or heating).
Local warden/site agent/contractor engineer details
Engineer name:
Company
Name:
Company
address:
Telephone:
Email:
Table 6
Invoices for attendance and repair work
carried out on this appliance by any third party
will not be accepted.
No appliance fault is found on over 30% of all
service calls.
▶ In the case of a suspected fault, refer to the
basic checks earlier in this section.

11
Environment/disposal
Greenstar HIU – 6 720 810 422 (2015/05)
8 Environment/disposal
Environmental protection is a fundamental corporate strategy
of the Bosch Group. The quality of our products, their economy
and environmental safety are all of equal importance to us and
all environmental protection legislation and regulations are
strictly observed.
We use the best possible technology and materials for
protecting the environment taking account of economic
considerations.
Packaging
We participate in the recycling programmes of the countries in
which our products are sold to ensure optimum recycling. All of
our packaging materials are environmentally compatible and
can be recycled.
9 Tips on energy saving
• Room thermostats/programmable room thermostats
– Reducing the temperature setting by 1 °C can reduce
the volume of metered district heating supply,
centralised heat source needed to heat the property.
• New controls systems
– Upgrade your heating control system if necessary with
the latest equipment available.
• Roof insulation
– Around 30% of the heat loss from a property is through
the roof. Replace any old insulation with new
insulation, preferably of around 200mm thickness or
more.
•Windowframes
– Single glazed windows, particularly those with steel
frames, can lose a great deal of heat. Consideration
should be given to replacement with PVCu or wooden
framed double glazed units.
•Radiators
– If a radiator is sited underneath a window, its
performance will be affected if the curtains are allowed
to drape over the radiator.
Shelves fitted above or in front of the radiator should
also be avoided.
It is advisable to manually adjust all thermostatic
radiator valves every 2 - 3 months to prevent them
sticking. Ensure radiator valves are correctly set and
not damaged.
•Draughts
– Try to ensure that draughts around doors, windows,
letter boxes and keyholes etc. are reduced by using a
suitable draught excluder.
•Curtains
– Lined curtains, or heavier full length curtains can
provide excellent insulation. However, always ensure
that the curtains do not drape over radiators.
Used appliances
▶ All Greenstar appliances are 100%
recyclable.
The various assemblies can be easily
dismantled and synthetic materials are
marked accordingly. Assemblies can
therefore be sorted by composition and
passed on for recycling.

WORCESTER, BOSCH GROUP:
TECHNICAL SUPPORT: 0330 123 3366
APPOINTMENTS: 0330 123 9339
SPARES: 0330 123 9779
LITERATURE: 0330 123 9119
TRAINING: 0330 123 0166
SALES: 0330 123 9669
Worcester, Bosch Group
Cotswold Way, Warndon, Worcester WR4 9SW.
Tel. [phone]
Worcester, Bosch Group is a brand name of
Bosch Thermotechnology Ltd.
worcester-bosch.co.uk
6 720 810 422 (2015/05)