Cleaning Primary Systems - Worcester GREENSTAR 24i junior Instruction Manual

IMPORTANT: All the following Pre-Installation sections must be read and
requirements met before starting boiler or flue installation.
CAUTION: ISOLATE THE MAINS SUPPLIES BEFORE STARTING ANY WORK AND
OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior
8 716 115 166a (06/2008)

CLEANING PRIMARY SYSTEMS

IMPORTANT: Debris from the system can
damage the boiler and reduce efficiency.
Failure to comply with the guidelines for
t he use of wat er treatment with the
appliance will invalidate the appliance
warranty.
BEFORE CLEANING THE SYSTEM:
ENSURE THE SYSTEM AND PIPEWORK
IS IN GOOD WORKING ORDER
WHERE POSSIBLE KEEP THE EXISTING
BOILER/CIRCULATING PUMP IN PLACE
WHEN FLUSHING THE SYSTEM.
FOLLOW GUIDANCE OF BS7593:
TREATMENT OF WATER IN DOMESTIC
HOT WATER CENTRAL HEATING AND
ALSO FLUSHING GUIDELINES SET OUT
BELOW.
CLEANING THE PRIMARY SYSTEM:
IMPORTANT: ARTIFICIALLY SOFTENED
WATER MUST NOT BE USED TO FILL THE
CENTRAL HEATING SYSTEM
• Fill the system with cold water and
check for leaks.
• Open all drain cocks and drain the
system.
• Close drain cocks and add a suitable
flushing agent compatible with
aluminium at the correct strength for
the system condition in accordance with
the manufacturer's instructions.
The PH value of the system water
must be less than 8 or the appliance
guarantee will be invalidated.
• Circulate the flushing agent before the
boiler is fired up.
• Run the boiler/system at normal operating
temperature as directed by the manufacturer
of the flushing agent.
• Drain and thoroughly flush the system to
remove the flushing agent and debris.
• It may be necessary to use a power flushing
machine to aid the cleansing procedure in
some circumstances
CLEANING PRIMARY SYSTEMS
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