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1
Key to symbols and safety instructions
1.1
Key to symbols
Warnings
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.
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
This symbol indicates important information where
there is no risk to people or property.
Additional symbols
Symbol
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
1
a list entry
a list entry (second level)
Table 1 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
▶ Next action
▶ 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.
Greenstar Heatslave II
2022 +
6 721 843 978 (2022/01)
Meaning
Key to symbols and safety instructions
List entries, first and second levels
• A single component/item
• A component/list, made up of multiple parts/items.
– Sub component or sub list of main component/list.
– etc.
Abbreviations used in this manual
Ø
Diameter
CH
Central Heating
DHW
Domestic Hot Water
DCW
Domestic Cold water
HE
Heat Exchanger
TRV
Thermostatic Radiator Valve
IP
Ingress Protection
CF
Conventional Flue
RS
Room Sealed
N/A
Not Applicable
SEDBUK Seasonal Efficiency of Domestic Boilers in the UK
OFTEC
Oil Firing Technical Association for the Petroleum Industry
IET
Institution of Engineering and Technology
WRAS
Water Regulations Advisory Scheme
LABC
Local Authority Building Control Body
DWTA
Domestic Water Treatment Association
Read these instructions before starting any installation
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.
The instructions apply in the UK and Eire only and must be followed
except for any statutory obligation.
This appliance must be installed by a competent person, failure to install
correctly could lead to prosecution.
1.2
General safety instructions
These installation instructions are intended for heating engineers,
plumbers, and electricians.
▶ Read any installation instructions (boiler, heating controls, etc.)
carefully before starting the installation.
▶ Observe the safety instructions and warnings.
▶ Observe national and regional regulations, technical rules and
guidelines.
▶ Record all work carried out.
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.
3
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