Bosch Worcester Greenstar HIU E Installation And Maintenance Instructions Manual page 5

Packaging
The following points should be observed during unpacking:
• Check the delivery immediately upon receipt for completeness and
transport damage
• In the event of transport damage, the delivery should only be
accepted conditionally
• Do not use damaged components for assembly
• The first fix rail can be removed from the side of the carton via a
perforated flap so that it can be fitted without having to remove the
rest of the appliance and cover from the packaging. This will reduce
the risk of damage to the rest of the appliance whilst the system is
being commissioned. The remainder of the appliance will remain in
the packaging and can be stored safely until needed.
• Carefully unpack the unit
• Ensure that all packaging material is removed and the unit is free from
all materials that may prevent the unit from operating correctly
Siting and installation
Correct siting, assembly and installation of the individual components
are the fundamental requirements for safe and economical operation of
the appliance.
▶ Only trained contractors are to site and install the appliance and its
components.
▶ The appliance must only be installed in rooms and locations that
meet the manufactures requirements.
Commissioning
▶ The appliance and the components must only be commissioned by a
competent person.
▶ Check all connections for leakages prior to starting up the heating
system.
▶ All fixings and fittings must be checked and tightened if required after
the unit has been installed.
Risk of damage due to operator error
Operator errors can result in injury and damage to property.
▶ Ensure that only personnel who can operate this appliance correctly
have access to it.
Inspection, maintenance and repairs
▶ Inspection, maintenance and repairs must only be carried out by
competent persons.
▶ Use only original spare parts from the manufacturer. The
manufacturer can assume no liability for damage caused by spare
parts not supplied by the manufacturer.
Electrical work
Electrical work must only be carried out by a qualified electrician:
▶ Before starting electrical work;
– Ensure that the electricity supply is safely isolated and secure to
prevent inadvertent re-connection.
– Information on safe isolation can be found in the Health and
Safety Executive Guidance HSG85.
– Using test equipment approved to GS38 confirm that the
electricity supply is disconnected.
▶ Refer to the manufacturer's information when installing other
components with Worcester equipment within the system.
Heat Exchanger
The unit contains copper-brazed stainless steel heat exchangers.
Please ensure the system complies with the requirements in
BS EN 12502 Part 1 and 2 to avoid any damage caused by corrosion.
6 720 808 928 (2017/06)
Key to symbols and safety instructions
Danger of burns and scalds
▶ Surfaces of individual components, connections and leaking water
can be very hot and cause severe burns and scalds.
▶ Do not touch hot surfaces.
▶ Caution should be taken not to touch any leaking water or drained
system water unless the temperature is known and safe.
Leakage
If leaks are observed:
▶ Immediately close all isolation valves.
▶ Ensure all leaks are repaired by a suitably qualified professional.
CAUTION: The district heating side of the appliance can
be operated with high pressure and high temperature
systems.
▶ Please apply extreme caution and wear the
appropriate safety equipment (PPE) when working
on suspected leaks.
NOTICE: The pressure differential across the primary
circuit of the heat interface unit must not exceed 80kPa
(800mbar) on units without a DPCV (differential
pressure control valve) as standard.
For units with internal DPCV (differential pressure
control valve) fitted, the maximum differential pressure
is 400kPa (4000mbar).
▶ A suitable means of control should be installed to
limit the differential pressure if the system design is
expected to exceed the limits above (depending on
the HIU model).
Instructing the customer
When handing over, instruct the user how to operate the heating system
and inform them about its operating conditions.
▶ Explain how to operate the heating system and draw the user's
attention to any safety-relevant action.
▶ Explain that modifications and repairs must only be carried out by an
authorised contractor.
▶ Hand customers the appliance documentation for safekeeping.
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