End User
6 720 805 339 (2014/09)
3
End User
Precautions should be taken when working on hot or cold water system
that is connected to an unvented hot water cylinder. Advice should
always be sought from your installer or professional to prevent potential
damage to the cylinder or associated equipment.
1
Key to symbols and safety precautions
1.1
Explanation of symbols
Warning symbols
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
Additional symbols
Benchmark places responsibilities on both manufacturers and
installers. The purpose is to ensure that customers are provided with the
correct equipment for their needs, that it is installed, commissioned and
serviced in accordance with the manufacturer's instructions by
competent persons and that it meets the requirements of the
appropriate Building Regulations. The Benchmark Checklist can be used
to demonstrate compliance with Building Regulations and should be
provided to the customer for future reference.
Installers are required to carry out installation, commissioning and
servicing work in accordance with the Benchmark Code of Practice
which is available from the Heating and Hotwater Industry Council who
manage and promote the scheme.
Visit
centralheating.co.uk
for more information.
As a member of the HWA, Worcester adhere to the following statements.
▶ To supply fit for purpose products clearly and honestly described,
▶ To supply products that meet, or exceed appropriate standards and
building and water regulations,
▶ To provide pre and post sales technical support,
▶ To provide clear and concise warranty details to customers.
Hot Water Association (HWA)
Camden House, Warwick Road,
Kenilworth, CV8 1TH
Tel: 01926 513777
Fax: 01926 855017
www.hotwater.org.uk
1.2
Safety instructions
Installation, conversion
▶ Only competent installers must install, commission, and maintain
this equipment.
▶ Only use the cylinder for heating domestic hot water.
Function
▶ Observe these installation and maintenance instructions to ensure
correct operation.
▶ Never switch the electric immersion heater on if the cylinder is not
full of water.
▶
Never restrict the outlets of the safety valves.
Thermal disinfection
▶
Risk of scalding!
Caution should be taken at periods of thermal disinfection due to the
possibility of domestic hot water temperatures being in excess of
60 °C .
Maintenance
▶
Recommendation for the customer:
Arrange a maintenance and
inspection contract with a competent person. Have the heating
appliance and the DHW cylinder serviced annually.
▶ Always switch the mains off when servicing the system.
▶ Only use genuine spare parts!
Decommissioning or draining down
▶ Please observe best practice guidelines when draining down the
system for routine maintenance or to decommission the cylinder.
Advice is given throughout this document.
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.
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.
Symbol
Meaning
▶
a step in an action sequence
a reference to a related part in the document or to other
related documents
•
a list entry
–
a list entry (second level)
Table 1
WARNING:
▶ If the cold water main is isolated internally or
externally for either emergency or maintenance
reasons, precautions should be taken to prevent
damage to the cylinder. The hot water isolation valve
located at the cylinder outlet should be closed off or
the cylinder should be drained down as per the
recommended procedure stated within this manual.
▶ If the unvented hot water cylinder is fitted at a height
(eg, loft), then there will be a potential of damage to
the cylinder if the correct method of draining the
cylinder is not followed.
▶ In certain circumstance it is recommended that a
WRAS approved automatic air vent is fitted on the
hot water outlet at the highest point.
