Installation, commissioning and servicing instructions [PDF] (44 pages)
- Updated: 16.05.2026
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Installation, Commissioning and Servicing Instructions
Floor standing RSF gas fired condensing regular boiler
Greenstar FS 30CDiErP & 42CDiErP Regular
6720648568-00.1Wo
For sealed or open vent central heating systems
6 720 818 079 (2016/04)
The appliances are for use with:
Natural Gas or L.P.G. (Cat. II 2H3P type C13, C33, C53 &C93)
Natural Gas:
FS 30CDi ErP Regular, GC number 41-406-62
FS 42CDi ErP Regular, GC number 41-406-64
L.P.G.:
FS 30CDi ErP Regular, GC number 41-406-63
FS 42CDi ErP Regular, GC number 41-406-65
Contents
Greenstar FS CDi ErP 6720818079 (2016/04)
2
Contents
1
KEY TO SYMBOLS AND SAFETY PRECAUTIONS . . . . . . . . . . . . 3
1.1
Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
APPLIANCE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3
Product data on energy consumption . . . . . . . . . . . . . . . 7
2.4
Layout and components . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Cleaning primary systems . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
Mains supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1
Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.2
Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3
Water systems and pipe work . . . . . . . . . . . . . . . . . . . . 11
3.4
Condensate pipe work . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4.1
Internal connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4.2
External connections . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5
Boiler location and clearances . . . . . . . . . . . . . . . . . . . 14
3.5.1
Boiler clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5.2
Airing cupboard clearances . . . . . . . . . . . . . . . . . . . . . 14
3.5.3
Vented compartments . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5.4
Rooms containing a bath or shower . . . . . . . . . . . . . . . 15
3.6
Flue options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7
Flue terminal positions . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.8
Plume management terminal positions . . . . . . . . . . . . 18
4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1
Unpacking the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2
Mounting frame fixing and flue opening . . . . . . . . . . . . 20
4.3
Flue measuring and cutting . . . . . . . . . . . . . . . . . . . . . . 21
4.4
Condensate, gas and water connections . . . . . . . . . . . 21
4.5
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5.1
PCB Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5
COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1
Pre-commissioning checks . . . . . . . . . . . . . . . . . . . . . . 24
5.2
Filling the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3
Water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4
Starting the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4.1
Switching the appliance on/off: . . . . . . . . . . . . . . . . . . 25
5.4.2
Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4.3
Display messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.5
Checking gas inlet pressure . . . . . . . . . . . . . . . . . . . . . 27
5.5.1
Measuring the inlet pressure . . . . . . . . . . . . . . . . . . . . 27
5.5.2
Checking the gas rate . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.6
CO and combustion check . . . . . . . . . . . . . . . . . . . . . . 28
5.7
Finishing commissioning . . . . . . . . . . . . . . . . . . . . . . . 29
6
SERVICING AND SPARES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1
Inspection and service . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.2
Service function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.3
Service inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.4
Fan pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5
Checking the flue integrity . . . . . . . . . . . . . . . . . . . . . . . 31
6.6
Flue gas analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.7
Heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.7.1
To clean the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.7.2
To check the flap valve in the fan intake . . . . . . . . . . . . 31
6.7.3
To clean the condensate trap . . . . . . . . . . . . . . . . . . . . . 32
6.7.4
Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . 32
6.7.5
Re-assembly of the burner cover . . . . . . . . . . . . . . . . . . 34
6.8
Setting the air/gas ratio . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.9
Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.9.1
Draining the appliance: . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.9.2
PCB control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.9.3
Fan assembly: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.9.4
Condensate pump: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.9.5
Sample points: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.9.6
Sensors: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.9.7
Condensate trap: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.9.8
Gas valve: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.9.9
Electrode assembly and heatshield: . . . . . . . . . . . . . . . 37
6.9.10 Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.9.11 Primary heat exchanger: . . . . . . . . . . . . . . . . . . . . . . . . 38
6.10
Short parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7
FAULT FINDING AND DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . 39
7.1
Electrical wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . 39
7.2
Boiler function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.3
Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
KEY TO SYMBOLS AND SAFETY PRECAUTIONS
Greenstar FS CDi ErP 6720818079 (2016/04)
3
1
KEY TO SYMBOLS AND SAFETY PRECAUTIONS
1.1
Key to symbols
Warnings
The following keywords are defined and can be used in this document:
•
NOTICE indicates a situation that could result in 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
SYMBOLS USED IN THIS MANUAL
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE
STARTING INSTALLATION.
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information where
there is no risk to people or property.
Symbol
Explanation
▶
Step in an action sequence
Cross-reference to another part of the document
•
List entry
–
List entry (second level)
Table 1
Domestic Hot Water
Central Heating
Hot Water Storage Cylinder
Domestic Cold Water Supply
Electrical Supply
Gas Supply
Table 2 Commonly used symbols
These instructions are applicable to the Worcester appliance model(s)
stated on the front cover of this manual only and must not be used with
any other make or model of appliance.
These instructions apply in the UK and Ireland only and must be
followed except for any statutory obligations.
This appliance must be installed by a competent registered gas
engineer, such as a Gas Safe registered engineer or British Gas
engineer. Failure to install correctly could lead to prosecution.
If you are in any doubt, contact the Worcester Technical help-line
(0330 123 3366).
Please leave these instructions with the completed BENCHMARK
CHECKLIST, (or a certificate confirming compliance with IS 813, Eire
only) and the user manual with the owner or at the gas meter after
installation or servicing.
Distance learning and training courses are available from Worcester.
The BENCHMARK CHECKLIST can be found in the back of this
Installation manual.
Ø
Diameter
NG
Natural Gas
LPG
Liquid Petroleum Gas
CH
Central Heating
DHW
Domestic Hot Water
DCW
Domestic Cold Water
PRV
Pressure Relief Valve
NTC
Negative Temperature Coefficient (sensor)
IP
Ingress Protection
RCD
Residual Current Device
TRV
Thermostatic Radiator Valve
ECV
Emergency Control Valve
WRAS
Water Regulations Advisory Scheme
SEDBUK
Seasonal Efficiency of Domestic Boilers in the UK
ErP
Energy related Products
DWTA
Domestic Water Treatment Association
Table 3 Abbreviations use in this manual
KEY TO SYMBOLS AND SAFETY PRECAUTIONS
Greenstar FS CDi ErP 6720818079 (2016/04)
4
1.2
Safety precautions
Instructions for the target group
These installation instructions are intended for registered gas fitters,
plumbers, heating engineers and electricians. All instructions must be
observed. Failure to comply with these instructions may result in
material damage and/or personal injury, including possible loss of life.
▶ Read these installation instructions before installation.
▶ Observe safety instructions and warnings.
▶ Observe national and regional regulations, technical rules and
guidelines.
▶ Keep a record of all work carried out.
Determined use
The product is not intended for commercial use.
The product may only be used in a domestic situation for the heating of
central heating water and for DHW heating in a closed-loop DHW and
heating systems.
Any other use is considered inappropriate. Any damage that may result
from misuse is excluded from liability.
If you smell gas
A gas leak could potentially cause an explosion. If you smell gas, observe
the following rules:
▶ Prevent flames or sparks:
– Do not smoke, use a lighter or strike matches.
– Do not operate any electrical switches or unplug any equipment.
– Do not use the telephone or ring doorbells.
▶ Turn off the gas at the meter or regulator.
▶ Open windows and doors.
▶ Warn your neighbours and leave the building.
▶ Prevent anyone from entering the building.
▶ Move well away from the building: call the National Gas Emergency
Service on 0800 111 999.
▶ L.P.G. boilers: Call the supplier’s number on the side of the gas tank.
Risk to life from poisoning by flue gas
There is a risk to life from escaping flue gas.
▶ Never modify any parts for the flue gas routing.
▶ Ensure that flue pipes and gaskets are not damaged.
Installation, commissioning and servicing
Installation, commissioning and servicing must only be carried out by a
competent, registered gas engineer, such as a Gas Safe registered
engineer or British Gas engineer.
▶ Carry out a gas tightness test after completing work on gas-carrying
components.
▶ Only use original spares.
Electrical work
Electrical work must only be carried out by a qualified electrician:
▶ Before starting electrical work;
– Ensure that the electricity supply is safely Isolated and secured to
prevent inadvertent re-connection.
Information on safe isolation can be found in the Health and
Safety Executive guidance HSG85.
– Using test equipment approved to GS38 confirm that the
electricity supply is disconnected.
▶ Refer to the manufacturer’s information when installing other
components with Worcester equipment within the system.
Handover to the user
When handing over, instruct the user how to operate the heating system
and inform the user about its operating conditions.
▶ Explain how to operate the heating system and draw the user's
attention to any safety relevant action.
▶ Explain that modifications and repairs must only be performed by a
competent, registered gas engineer, such as a Gas Safe registered
engineer or British Gas engineer.
▶ Advise the user to have the system serviced annually by a competent,
registered gas engineer, such as a Gas Safe registered engineer or
British Gas engineer.
▶ Leave the installation instructions with the completed Benchmark
Checklist (or a certificate confirming compliance with IS 813, Eire
only) and the operating instructions with the user or at the gas meter.
Boiler operation
This appliance can be used by children aged from 8 years
and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge, if
they have been given supervision or instruction concerning
use of the appliance in a safe way and understand the
hazards involved. Children shall not play with the
appliance. Cleaning and user maintenance shall not be
made by children without supervision.
Servicing
Advise the user to have the system serviced annually by a competent,
registered gas engineer, such as a Gas Safe registered engineer or
British Gas engineer. Approved spares must be used to help maintain
the economy, safety and reliability of the appliance.
Important
The service engineer must complete the Service Record on the
Benchmark Checklist after each service.
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 manufacturer's 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 installation, commissioning and
servicing work in accordance with the Benchmark Code of Practice
which is available from the Heating and Hot water Industry Council who
manage and promote the scheme.
Visit centralheating.co.uk for more information.
Health and safety
The appliance contains no asbestos and no substances have been used
in the construction process that contravene the COSHH Regulations
(Control of Substances Hazardous to Health Regulations 1988).
Combustion and corrosive materials
Do not store or use any combustible materials (paper, thinners, paints
etc.) inside or within the vicinity of the appliance.
Chemically aggressive substances can corrode the appliance and
invalidate any warranty.
Fitting and modification
Fitting the appliance and any controls to the appliance may only be
carried out by a competent engineer in accordance with the current Gas
Safety (Installation and Use) Regulations.
Flue systems must not be modified in any way other than as described in
the fitting instructions. Any misuse or unauthorised modifications to the
appliance, flue or associated components and systems could invalidate
the warranty. The manufacturer accepts no liability arising from any
such actions, excluding statutory rights.
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