Key To Symbols And Safety Precautions; Explanation Of Symbols - Worcester 41-311-67 Installation, Commissioning And Servicing Instructions

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KEY TO SYMBOLS AND SAFETY PRECAUTIONS

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EXPLANATION OF SYMBOLS

WARNING SYMBOLS
Safety instructions in this document are
framed and identified by a warning triangle
which is printed on a grey background.
Electrical hazards are identified by a
lightning symbol surrounded by a warning
triangle.
Signal words indicate the seriousness of the hazard in
terms of the consequences of not following the safety
instructions.
• NOTICE indicates possible damage to property or
equipment, but where there is no risk of injury.
• CAUTION indicates possible injury.
• WARNING indicates possible severe injury.
• DANGER indicates possible risk to life.
IMPORTANT INFORMATION
Notes contain important information in
cases where there is no risk of personal
injury or material losses and are identified
by the symbol shown on the left. They are
bordered by horizontal lines above and
below the text.
ADDITIONAL SYMBOLS
Symbol Meaning
a step in an action sequence
B
a reference to a related part in the
document or to other related documents
a list entry
•
a list entry (second level)
–
Tab. 1 Symbols
SYMBOLS USED IN THIS MANUAL
Domestic Hot Water
Central Heating
Hot Water Storage Cylinder
Domestic Cold Water Supply
Electrical Supply
Gas Supply
Tab. 2 Commonly used symbols
6 720 644 743a (2010/10)
KEY TO SYMBOLS AND SAFETY PRECAUTIONS
PLEASE READ THESE INSTRUCTIONS CAREFULLY
BEFORE STARTING 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 ONLY AND MUST
BE FOLLOWED EXCEPT FOR ANY STATUTORY
OBLIGATION.
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.
DISTANCE LEARNING AND TRAINING COURSES ARE
AVAILABLE FROM WORCESTER.
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.
THE BENCHMARK CHECKLIST CAN BE FOUND IN THE
BACK PAGES OF THE INSTALLATION MANUAL.
ABBREVIATIONS USED IN THIS MANUAL:
Ø Diameter
NG Natural Gas
LPG Liquid Petroleum Gas
CH Central Heating
DHW Domestic Hot Water
PRV Pressure Relief Valve
NTC Negative Temperature Coefficient (sensor)
IP Ingress Protection
RCD Residual Current Device
TRV Thermostatic Radiator Valve
WRAS Water Regulations Advisory Scheme
SEDBUK Seasonal Efficiency of Domestic Boilers in
the United Kingdom
Tab. 3 Abbreviations
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