KEY TO SYMBOLS AND SAFETY PRECAUTIONS
6 720 821 670 (2018/06)
4
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
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.
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.
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
Meaning
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
a list entry
a list entry (second level)
Table 1 Symbols
1
Domestic Hot Water
Central Heating
Hot Water Storage Cylinder
Domestic Cold Water 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 and serviced by a
GAS SAFE
registered, competent person. Failure to install correctly could lead to
prosecution.
If you are in any doubt, contact the Worcester Technical helpline (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
DWTA
Domestic Water Treatment Association
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 United
Kingdom
Table 3 Abbreviations use in this manual
Summary of Contents for Worcester GREENSTAR 12Ri ErP +
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