Technical data

KEY TO SYMBOLS AND SAFETY PRECAUTIONS
6 720 648 547 (2012/06) 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:
• NOTE 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)
Domestic Hot Water
Central Heating
Hot Water Storage Cylinder
Domestic Cold Water Supply
Electrical Supply
Gas Supply
Table 1 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 GAS SAFE registered,
competent person. Failure to install correctly could lead to
prosecution.
If you are in any doubt, contact the Worcester Technical helpline
(0844 892 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.
ØDiameter
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 United
Kingdom
Table 2 Abbreviations use in this manual