Explanation of symbols and safety instructions
Worcester Commercial Boiler Series – 6720814332 (2019/04)
4
1.2
General safety instructions
H
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.
• 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 including a
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).
• Distance learning and training courses are available
from Worcester.
• The BENCHMARK Commissioning Checklist can be
found on page 50 of this Installation manual.
Abbreviations used in this manual
H
Notices for the target group
These installation instructions are intended for gas,
plumbing, heating and electrical contractors. All
instructions must be observed. Failure to comply with
instructions may result in material damage and
personal injury, including danger to life.
▶ Read the installation instructions (heat source,
heating controller, etc.) before installation.
▶ Observe the safety instructions and warnings.
▶ Follow national and regional regulations, technical
regulations and guidelines.
▶ Record all work carried out.
H
Determined use
The product may only be used in a domestic situation
for the heating of central heating water and for DHW
heating in 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.
▶ 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.
H
Danger to life from poisoning by flue gas
There is a danger to life from escaping flue gas.
▶ Ensure that flues and gaskets are not damaged.
H
Danger of death from poisoning by flue gas due
to inadequate combustion
Danger of death due to flue gas leak. If flues are
damaged or leaking, or if you smell flue gas, observe
the following rules.
▶ Close the fuel infeed.
▶ Open doors and windows.
▶ If necessary, warn all residents and leave the
building.
▶ Prevent third parties from entering the building.
▶ Rectify any damage to the flue gas pipe
immediately.
▶ Check the combustion air supply.
▶ Do not cover or reduce the size of ventilation
openings in doors, windows and walls.
▶ Ensure that there is adequate combustion air
supply, including for any appliances installed at a
later date, e.g. extractor fans, kitchen fans or air
conditioning units that discharge air to the outside.
▶ Never operate the device if there is insufficient
combustion air supply.
H
Installation, commissioning and maintenance
Installation, commissioning and maintenance must
only be carried out by an approved contractor.
▶ Carry out a gas tightness test after completing work
on gas-carrying components.
Ø Diameter
NG
Natural Gas
LPG
Liquid Petroleum Gas
CH
Central Heating
DHW
Domestic Hot Water
HE
Heat exchanger
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
ErP
Energy related Products
