Bosch WORCESTER Greenstar CDi Classic Series Handbuch

Technical and Speciﬁcation Information Greenstar CDi Classic Series

Greenstar CDi Compact Series

Greenstar Si Compact Series

Greenstar i Junior Series

Greenstar combi gas-ﬁred condensing

wall mounted boiler range

NEW

Greenstar

Combi range

Worcester and you. Making a dif

As part of the Bosch Group, Worcester

products are designed and manufactured to

provide customers with the highest levels of

quality and reliability which are synonymous

with the Bosch name throughout the world.

As part of Europe’s largest supplier of

heating products, Worcester, Bosch Group

has the UK-based resources and support

capability to offer you the value-added

solutions you deserve. Worcester employs

a nationwide network of Service Engineers

and technically trained Field Sales Managers

supported by an experienced technical

services team which is able to provide

comprehensive support and advice

from designing system layouts through

to installation.

Worcester is dedicated to providing energy

efﬁcient gas- and oil-ﬁred condensing

boilers, as well as an extensive range of

renewable technologies. All of our products

have been developed and introduced with

the aim of helping the UK to achieve the

Government’s efﬁciency targets.

erence.

“At Worcester we recognise the vital role you

play in the speciﬁcation and installation of

energy efﬁcient appliances in homes across

the UK. We will continue to invest in our

products, people, facilities and added value

services to ensure you have all you require in

order to deliver only the best solutions to your

customers’ requirements.”

Carl Arntzen,

Managing Director,

Bosch Thermotechnology Ltd.

Contents Page

The Greenstar combi condensing boiler range 4 - 5

Key features of the range 6 - 7

Greenstar CDi Classic features and beneﬁts 8 - 9

Inside story – Greenstar CDi Classic 10 - 11

Greenstar CDi Compact features and beneﬁts 12 - 13

Inside story – Greenstar CDi Compact 14 - 15

Greenstar Si Compact features and beneﬁts 16 - 17

Inside story – Greenstar Si Compact 18 - 19

Greenstar i Junior features and beneﬁts 20 - 21

Inside story – Greenstar i Junior 22 - 23

Optional plug-in controls 24 - 25

Site preparations and guidance 26 - 31

Greenstar combi installation requirements 32 - 34

The Worcester Greenstar System Filter 35

The Worcester Keyless Filling Link 36 - 37

Condensate pipework 38 - 39

The Worcester CondenseSure siphon 40 - 41

Horizontal and vertical ﬂue terminal positioning 42 - 43

Horizontal ﬂuing options 44 - 47

Vertical ﬂuing options 48 - 50

Plume management positioning and system options 51 - 54

Accessories 55 - 59

Worcester training 60 - 62

After-sales 63

The reception and main entrance

at our Worcester headquarters

The Greenstar combi range is part of a market-leading

range of energy-saving gas-ﬁred boilers. Renowned for

their energy efﬁciency, reliability, ease of installation and

servicing, more than 2 million Greenstar combi boilers have

been installed in homes across the UK.

As part of our commitment to offer installers high quality

products and innovative heating solutions, Worcester has

improved its entire combi range.

Greenstar Si Compact

Greenstar CDi Classic

The Greenstar combi gas-ﬁred wall

Now part of the range are the all-new, revolutionary

Greenstar CDi Compact and Si Compact models, which

have an innovative WB7 heat exchanger designed to

combine both compact dimensions with a high efﬁciency.

Also, the Greenstar CDi Classic has recently undergone a

number of enhancements including increased domestic

hot water performance, a new magnetic ﬂap and reduced

standby electrical consumption.

For lower hot water output applications, the Greenstar

i Junior range has also been improved with the addition of

a DHW control added to the fascia, along with a series of

other features.

Greenstar CDi Compact

Greenstar i Junior

mounted condensing boiler range

Key features of the range

Winner of Which? Best Buy awards

in 2011, 2012 and 2013

For three consecutive years, in a survey of

Which? members, the Worcester Greenstar

gas-fired condensing boiler range has been

presented with Best Buy awards.* In the

latest survey, no other manufacturer scored

higher for reliability and customer satisfaction.

Highly efﬁcient, highly cost-effective

All Worcester Greenstar condensing combi boilers

have an annual A rated efﬁciency (SEDBUK 2005

value) of over 90%, efﬁciently producing heating

and hot water for the home. Non-condensing boilers

achieve around 78% efﬁciency.

Low NOx options

Worcester’s commitment to reduce emissions from

gas-ﬁred condensing boilers sees all Greenstar

combi boilers achieve NOx values <40mg/kWh.

This enables the appliances to achieve 3 credits

under the Code for Sustainable Homes. The i Junior

requires a low NOx code plug which is available

as an optional accessory. All other boilers are low

NOx as standard.

Hot water mode

Whenever a hot water tap is turned on, the

incoming mains water will activate a ﬂow turbine

which, via the electronic control system, ignites

the pre-mix burner. Boiler output is automatically

boosted to maximum in order to heat the incoming

cold water as it passes through the heat exchanger.

Electronic controls modulate the boiler output to

ensure an accurate hot water temperature.

Keep hot facility

All Greenstar combi models have an in-built

‘keep hot’ facility which will keep the primary water

within the heat exchanger hot – approximately

2.5 litres volume. This will ensure that hot water is

delivered almost instantly to the opened outlet.

ECO mode

With the ECO mode button activated, the ‘keep hot’

facility is de-energised and the hot water will be

heated from cold. A slight delay should be expected

before the hot water is at full temperature when in

ECO mode. By selecting ECO mode, less gas will be

used as energy is used only on demand.

Central heating mode

On a central heating demand, the boiler will initially

ﬁre at minimum output before modulating upwards

to meet the system’s actual requirement. Electronic

controls within the boiler continually monitor the

heating ﬂow and return temperature and increase

or decrease the output on demand.

Fluing options

The Greenstar combi range has a full range of

Condensﬁt II™ ﬂue options in both 60/100mm

and 80/125mm diameters and include a plume

deﬂector as standard. This versatile ﬂue system

can be run horizontally or vertically.

The Greenstar Si Compact

has the same fascia with an

intuitive in-built display as the

Greenstar CDi Compact

The Greenstar combi range at a glance

Boiler 29CDi

Classic

34CDi

Classic

38CDi

Classic

42CDi

Classic

28CDi

Compact

32CDi

Compact

36CDi

Compact

25Si

Compact

30Si

Compact

24i

Junior

28i

Junior

Part No. NG

LPG

7 738 100 216 7 738 100 218 7 738 100 222 7 713 331 019 7 716 130 234 7 716 130 235 7 716 130 236 7 716 130 230 7 716 130 232 7 716 130 220 7 716 130 222

7 738 100 217 7 738 100 219 7 738 100 223 7 713 331 020 7 716 130 237 7 716 130 238 7 716 130 239 7 716 130 231 7 716 130 233 7 716 130 221 7 716 130 223

Output kW to DHW

Min

Max

7.7kW 7.7kW 9.4kW 9.4kW 7.03kW 7.03kW 7.03kW 7.03kW 7.03kW 7.2kW 7.2kW

30.9kW 35kW 40kW 42kW 28kW 32kW 36kW 25kW 30kW 24kW 28kW

Flow rate at 35ºC ∆T

(± 15%)

12.3l/min 14.3l/min 16.4l/min 17.2l/min 11.4l/min 13.1l/min 14.7l/min 10.2l/min 12.3l/min 9.8l/min 11.4l/min

Flow rate at 40ºC ∆T

(± 15%)

11l/min 12l/min 14l/min 15l/min 10l/min 11.5l/min 12.9l/min 8.9l/min 10.7l/min 8.6l/min 10l/min

Output kW to Min

central heating (CH) Max

7.7kW 7.7kW 9.4kW 9.4kW 7.03kW 7.03kW 7.03kW 7.03kW 7.03kW 7.2kW 7.2kW

30kW 30kW 30kW 30kW 24kW 24kW 24kW 24kW 24kW 24kW 24kW

Maximum output kW

to central heating (CH)

with low NOx code plug

–––––––––13kW 13kW

CH temperature control 99999999999

DHW temperature

control 99999999999

Modulating control 99999999999

Electronic ignition 99999999999

In-built ﬁlling link 9999999

(optional) (optional) (optional) (optional)

Condensing in DHW 999999999

––

The Greenstar condensing combi range –

features and beneﬁts at a glance

Energy-saving & environmental

•SEDBUK A rating of 90.1%

and above (2005 value)

•Simple and intelligent control

options are available to optimise

boiler efﬁciency

•Low electrical consumption in

standby mode

•Aluminium-silicon heat exchangers

deliver high efﬁciency and reliability

•Greenstar CDi Classic, CDi Compact

and Si Compact condense in

DHW mode

•Modulating pump which uses less

electricity than a ﬁxed speed pump –

Greenstar CDi Classic and

CDi Compact only

•Anti-cycle control.

Time & labour-saving installation

•Wall frame allows space for pipes

behind the boiler as standard

•Vertical pre-piping assembly

available as an accessory

•Full range of Condensﬁt II™

ﬂue options

•Multi-directional ﬂuing means

boiler can be sited in a wider

variety of places

•The boiler comes pre-wired and

pre-plumbed

•There is no need to install a hot

water cylinder

•There is no need to install a

storage tank in the roof space

•There is less pipework in the

heating system.

End user comfort and convenience

•10 year guarantee on Worcester

primary heat exchanger†

•Boiler protection plans available

for both new and out-of-guarantee

Worcester Greenstar boilers

•Bosch renowned quality

and reliability

•Built-in boiler frost protection

•Small dimensions –

Greenstar CDi Compact, Si Compact

and i Junior models

•ECO mode for energy-saving fuel

consumption

•Controls behind ﬂap – aesthetically

pleasing and minimises the risk of

tampering with controls.

*Source: Which? 2013 survey published in Sept 2013. †Subject to terms and conditions.

Greenstar CDi Classic

Features and beneﬁts

The top-of-the-range, award-winning Greenstar CDi Classic is a high

performance boiler that is suitable for small, medium and large-sized

properties with one or two bathrooms. It has set the benchmark within

the industry for efﬁciency, reliability and ease of installation, while

achieving a market-leading output of up to 42kW.

The Greenstar CDi Classic offers the opportunity to range-rate the central

heating output to perfectly match the properties’ requirements which

reduces cycling and improves efﬁciency further.

As well as being the ﬂagship boiler in our Greenstar combi range, the

upgraded CDi Classic now beneﬁts from a number of new improvements

including higher DHW ﬂow rates of 12.3, 14.3 and 16.4 to complement

the already class-leading 17.2 l/min performance.

The improvements to the control box now includes lead-free components

for environmental beneﬁts, a clearer display for temperatures and

commissioning settings, and a new short-circuit-proof PCB design that

removes the need for fuses on the low voltage circuits. The control box

casing is more water-resistant due to the removal of the transformer, while

the lift weight of the appliance has also been reduced to 47.5kg.

The Greenstar CDi Classic achieves 3 credit points within the Code for

Sustainable Homes and has an A rated annual efﬁciency of up to 90.2%

(SEDBUK 2005 value).

Greenstar CDi Classic is

available with DHW ﬂow rates

of 12.3, 14.3, 16.4 and

17.2 l/min

Installation beneﬁts

•Standard wall frame allows space for

pipes behind the boiler

•Can be serviced entirely from the

front with easy access to parts

and components

•All models available as natural gas and

LPG for a range of properties

•Split wall-mounting jig provided as

standard for pre-plumbing of all

7 connections – gas, water, PRV &

condensate connections before the

boiler is on the wall

•Full range of Condensﬁt II™ horizontal and

vertical ﬂue options with optional plume

management kit available

•Multi-directional ﬂuing means boiler can

be sited in a wider variety of places.

Environmental beneﬁts

•SEDBUK A rating of up to 90.2%

(2005 value)

•WB5 heat exchanger delivers high

efﬁciency and reliability

•Low electrical consumption when in

standby mode

•NOx emissions of 35mg/kWh –

achieves 3 credits under the Code

for Sustainable Homes

•All boilers and components are 100%

recyclable, achieving Worcester’s zero

waste to landﬁll objective.

*Terms and conditions apply.

WB5 heat exchanger

The Worcester WB5 heat exchanger

has been designed to optimise clean

burning combustion over an extra-

large surface area. Each heat

exchanger is factory-set and 100%

tested so, as long as the gas inlet

pressure is correct, commissioning

is straightforward. The heat

exchanger requires minimal

servicing which means fewer spare

parts during its lifetime. The heat

exchanger can be cleaned in situ via

an inspection hatch, again saving

time during service.

2 million installed and still

going strong

With more than 2 million Greenstar

combi boilers installed in the

UK, the ever popular Worcester

Greenstar CDi Classic, with its

advanced features and future-proof

technology, still sets the standard

for premium quality, high-efﬁciency

combi boilers.

On the primary

heat exchanger*

End user beneﬁts

•Heat exchanger delivers high efﬁciency

and reliability

•Energy-saving anti-cycle and

modulation control

•Fully modulating pump for reduced

electricity consumption and quieter

operation

•Condenses in CH and DHW mode, resulting

in greater efﬁciency and fuel savings

•Low electrical consumption when in

standby mode

•Includes internal keyed ﬁlling link

•Optional Worcester Keyless Filling Link

available as an upgrade, making system

re-pressurisation easy

•5 year guarantee on plate heat exchanger*

•10 year guarantee on Worcester primary

heat exchanger*

•Boiler protection plans available

•Part of the Which? Best Buy range for

gas-ﬁred condensing boilers.

The Greenstar CDi Classic boiler is

recommended by the Energy Saving

Trust (EST). The Energy Saving Trust

is a non-proﬁt organisation that

provides free and impartial advice

on how to save energy.

WB5

Heat Exchanger

Inside story – Greenstar CDi Classic

Down ﬁring low NOx burner

Pre-mix fan

Automatic air vent (hidden)

Pressure gauge

Modulating pump

Diverter valve

Drain point

Expansion vessel

Gas valve

Condensate siphon

Aluminium/Silicon primary

WB5 heat exchanger

Secondary DHW plate heat exchanger

Central heating

temperature control

On/off

button

Mains

indicator

Digital

display

Domestic

hot water

temperature control

Greenstar CDi Classic fascia with optional

DT10RF ﬁtted

Optional

programmer

Pressure

gauge

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