WORCESTER Greenstar KE Heat Interface Unit Installation Guide
- July 3, 2024
- WORCESTER
Table of Contents
- WORCESTER Greenstar KE Heat Interface Unit
- Product Usage Instructions
- District heating on any scale
- All the properties contractors look for
- Delivering for investors
- Under the cover Greenstar HIU KE
- Dimensions and clearances
- Internal schematic
- Technical data
- Features of the Greenstar HIU range
- District heating design services
- FAQ
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
WORCESTER Greenstar KE Heat Interface Unit
Specifications
- Manufacturer : Bosch Thermotechnology Ltd.
- Model : Greenstar Heat Interface Unit (HIU)
- Flow Rate : 21 litres per minute
- Weight : 33kg*
Product Usage Instructions
Installation
The Greenstar HIU is designed for properties connected to district heating
or centralised boiler plants. Follow these steps for installation:
- Ensure proper rail pipe work jig setup.
- Make top and bottom connections using the pre-made pipe work kit if preferred.
- Use in-line compression fittings for easy installation.
- Connect to district heating using 3/4MBSP fittings.
- Adjust ERP pump settings as needed.
Operation
To operate the Greenstar HIU efficiently:
- Monitor the DHW temperature limiter for safety.
- Use the Mbus meter connection point for monitoring consumption.
- Adjust the DHW valve for optimal heat exchanger performance.
- Maintain controlled water temperature to prevent limescale formation.
Maintenance
Regular maintenance is crucial for the longevity of the Greenstar HIU:
- Clean or replace filters as necessary.
- Check and adjust pump settings periodically.
- Inspect for leaks and ensure proper insulation.
- Consider professional servicing annually.
Meet the next-generation Heat Interface Unit (HIU)
Designed with the future in mind
- The new Greenstar HIU is part of a market-leading range of innovative energy-saving heating and hot water solutions from Bosch Thermotechnology Ltd.
- The Greenstar HIU provides domestic hot water and space heating to properties that are serviced from district heating or centralised boiler plants, and is fully compatible with the Bosch Commercial and Industrial product range.
- Designed to meet the latest and future market requirements, the new Greenstar HIU includes a top-of-the-range appliance that offers 21 litres per minute flow rate and incorporates components such as a differential pressure reducing valve.
District heating on any scale
Small and large scale solutions
The Greenstar HIU is perfect for both small and large scale district heating
solutions. This includes flatsand other multi-residential accommodation, as
well as buildings that use uneconomical electric heating, or have individual
gas appliances in each property. A centralised heating concept allows
investors to take full advantage of a low carbon heat source or a
modular/hybrid configuration with high efficiency condensing boilers. The
Greenstar HIU is also compatible with Bosch Commercial and Industrial products
for both new and existing multi-purpose and multi-residential buildings, as
well as large estates that include commercial units.
Custom solutions…
from Europe’s market leader in heating and hot water systems.
District Heating Design Team
Turn to page 11 to learn about how our team can design the complete system for
your new build,
All the properties contractors look for
- Separate first fix rail pipe work jig
- Top and bottom connections with optional pre-made pipe work kit
- Insulation as standard
- Pre-set adjustable ERP pump with inbuilt pump kick
- Flushing bypass and security fixings available as accessory
- Inbuilt filter and DHW temperature limiter
- Mbus meter connection point
- In built pre-payment function – no need for external valves
- Keyless filling link available as an accessory
- Easy to install with in-line compression fittings, or with 3/4”MBSP fittings on the district connections, and can be installed in a small area
- Weighs 33kg*
- A DHW valve prioritises the temperature at the DHW heat exchanger for maximum comfort
- Controlled water temperature in the heat exchanger reduces the risk of limescale formation
- Supplied with or without heat meter to suit specific requirements
- At our training academy, we can test your specific design parameters against our HIUs, while demonstrating its performance
- Bosch employed and trained engineers providing national coverage
- Quick on-site engineer response time
- Contact centre open 364 days a year.
Delivering for investors
- The automatic control of the return temperature\ maintains the district heating scheme requirement for low return temperatures
- High differential pressure tolerance of 800mbar (without DPCV) and up to 4000mbar (with DPVC)
- Adjustable secondary flow temperatures for low temperature heating
- Maximum heating and DHW temperatures set by the commissioning engineer
- Low return temperature in the primary circuit maximises efficiency in the system, saving energy
- Internal insulation standard on all models
- Models with heat meters for measurement of heat energy used in individual properties.
Under the cover Greenstar HIU KE
Dimensions and clearances
Dimensions and hydraulic connections
| Key | Description | Connection (mm) |
|---|---|---|
| 1 | Cold mains inlet | 22 |
| 2 | Domestic Hot Water outlet | 22 |
| 3 | District heating supply | 22 |
| 4 | District heating return | 22 |
| 5 | Central heating flow | 22 |
| 6 | Central heating return | 22 |
| 7 | Pressure relief valve | 15 |
Minimum installation and maintenance clearances
| Key | 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 appliance | 5 |
| 7 | Below the appliance | 200 |
Minimum compartment clearances
| Key | Description | Dimensions (mm) |
|---|---|---|
| 1 | Compartment height | 930 |
| 2 | Compartment width | 450 |
| 3 | Above the appliance | 30 |
| 4 | Either side of the appliance | 5 |
| 5 | Below the appliance | 200 |
| 6 | Compartment depth | 290 |
| 7 | Appliance to removable door | 20 |
Internal schematic
| Key | Description | Key | Description | |
|---|---|---|---|---|
| 1 | Control unit | 11 | Domestic Hot Water safety valve | |
| 2 | Return sensor NTC (district heating) | 12 | Flow turbine | |
| 3 | Central heating plate heat exchanger | 13 | Flow regulator | |
| 4 | Central heating control valve | 14 | Domestic Hot Water outlet sensor NTC | |
| 5 | Differential pressure control valve (if fitted) | 15 | Domestic Hot Water |
control valve
6| Flow sensor NTC (central heating)| | 16| Domestic Hot Water plate heat
exchanger
7| Heat meter (if fitted)| | |
8| Circulating pump| | |
9| Heat meter flow sensor connection point| | |
10| Supply sensor NTC (district heating)| | |
Technical data
General Information
| ****
Units
| Greenstar HIU KE
with Heat Meter
| Greenstar HIU E
with Heat Meter
---|---|---|---
Height| mm| 700| 700
Width| mm| 440| 440
---|---|---|---
Depth| mm| 270| 270
Total unit weight (lift weight)| kg| 33| 31
Packaged unit weight| kg| 36| 34
Maximum output to domestic hot water 1)| kW| 72.7| 51.4
Output range to central heating| kW| 1-15| 1-15
Maximum flow temperature secondary heating| ºC| 80| 80
Maximum flow temperature DHW| ºC| 60| 60
District heating flow and return connections (compression)| mm| 22| 22
District heating flow and return connections (flat faced)| inch| 3/4”MBSP|
3/4”MBSP
Secondary heating flow and return connections (compression)| mm| 22| 22
Cold feed and DHW connections (compression)| mm| 22| 22
Pressure relief valve connection| mm| 15| 15
Maximum working pressure district heating side| bar| 10| 10
Pressure relief valve setting secondary heating side| bar| 3| 3
Maximum working pressure domestic hot water side| bar| 10| 10
pH value (district water supply), approximate| | 7-9| 7-9
Expansion vessel| l| 5| 5
Expansion vessel charge| bar| 0.75| 0.75
District Temperature (80ºC)
Primary flow rate| l/s| 0.225| 0.153
Primary return temperature| ºC| 17.7| 19.0
Primary pressure drop| kPa| 20.0| 11.5
DHW output (50°C)| kW| 58.6| 39.1
DHW flow rate (50°C)| l/min| 21| 15
District Temperature (70ºC)| | |
Primary flow rate| l/s| 0.213| 0.18
Primary return temperature| ºC| 22.7| 25
Primary pressure drop (including heat meter)| kPa| 40.4| 29.8
DHW output (50°C)| kW| 41.3| 33
DHW flow rate (50°C)| l/min| 15| 12
District Temperature (60ºC)
Primary| flow| rate| l/s| 0.248| 0.2
Primary return temperature| °C| 27.6| 29.8
Primary pressure drop| kPa| 54.6| 36.4
DHW output (50°C)| kW| 33| 24.8
DHW flow rate (50°C)| l/min| 12| 9
Electrical| | |
Electrical power supply voltage| AC…V| 230| 230
Frequency| Hz| 50| 50
Maximum power consumption| W| 41.3| 41.3
Standby power consumption| W| 3.1| 3.1
Appliance protection rating| IP| 40| 40
-
Nominal output at 90°C primary and 60°C DHW.
-
Sized for up to 15kW radiator systems.
| | |
End users enjoy accurate control and responsive heating to achieve the desired comfort levels.
Features of the Greenstar HIU range
| Greenstar KE | Greenstar E |
|---|---|
| 21 litres/min flow rate | 15 litres/min flow rate |
| Electronically controlled internal valve | Electronically controlled internal |
valve
Integral pressure balancing valve (DPCV) as standard| Integral pressure
balancing valve (DPCV) as accessory
Ability to remotely isolate unit (with heat metering partner)| Ability to
remotely isolate unit (with heat metering partner)
Summer bypass as accessory| Summer bypass as accessory
Customer access to heat meter data| Customer access to heat meter data
Ability to fit anti-tamper screws to the casing| Ability to fit anti-tamper
screws to the casing
Insulation on internal components| Insulation on internal components
10 bar district heating pressure| 10 bar district heating pressure
Ability to run pipes behind unit| Ability to run pipes behind unit
Modulating pump| Modulating pump
System flushing valve as accessory| System flushing valve as accessory
All Greenstar HIU options are available in two versions, with or without a heat meter. *Our KE and E models are BESA-registered
District heating design services
Whether designing a new build, retrofit or deep renovation heat network, our
expert consultants are here to help you fully design and configure the perfect
system – from plant room to HIU and everything inbetween.
Speak to your local Bosch Commercial and Industrial contact to arrange a visit
to our training academy. Here we can test specific design parameters against
our HIUs, while demonstrating its performance for your specific project.
- Supporting designs in accordance with CIBSE CP1 2020
- Ensure minimal heat loss and low return temperatures
- Correct sizing of plant and network
- Layouts on 3D drawing (including plant room schematics/riser schematics)
- BIM level 2 covering entire product range
- System and product configuration
- Design and schematic reviews
- Dedicated Bosch consultant assigned to you
- District Heating CPD available.
For more information or to discuss a project, please call our design team on 0330 123 3004, or email us at: commercial.industrial@uk.bosch.com
Did you know? You can also book a free design consultation at bosch- industrial.co.uk/district-heating
Useful numbers
- Sales
- Tel : 0330 608 8456
- Email : sales.bosch@uk.bosch.com
- Technical Helpline (Pre & Post Sales)
- Tel : 0330 123 0165
- Email : technical-advice@uk.bosch.com
- Spare Parts
- Email : spares.mailbox@uk.bosch.com
- or telephone 0330 123 9779
- Controls Helpline
- Tel : 0330 123 3641
- Training
- Email : training@uk.bosch.com
- or telephone 0330 123 0166
- Book a course online at Worcester-bosch.co.uk/eacademy
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- @WorcesterBoschProfessional
- @WorcesterBosch
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Calls to and from Bosch Thermotechnology Ltd may be recorded for training and quality assurance purposes. This brochure is accurate at the date of printing but may be superseded and should be disregarded if specifications and/or appearances are changed in the interest of continued improvement. The statutory rights of the consumer are not affected.
FAQ
Q: What type of properties is the Greenstar HIU suitable for?
A: The Greenstar HIU is ideal for both small and large-scale district heating
solutions, including flats, multi-residential buildings, and properties with
individual gas appliances.
Q: How can I contact support for the Greenstar HIU?
A: You can reach our design team at 0330 123 3004 or email
commercial.industrial@uk.bosch.com
for enquiries.
Q: Does the Greenstar HIU come with a heat meter?
A: The Greenstar HIU can be supplied with or without a heat meter to suit
specific requirements.
References
- Bosch Thermotechnology Commercial & Industrial
- Invented for life | Bosch Global
- New Boilers | Worcester Bosch
- Global Teach
- Complete heat network solutions | Worcester Bosch
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>