Pre-Installation; Cleaning Primary Systems - Worcester GREENSTAR 24i Junior Installation Instructions Manual

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PRE-INSTALLATION

3.1

CLEANING PRIMARY SYSTEMS

NOTICE:
B All the following Pre-Installation sections
must be read and requirements met
before starting boiler or flue installations.
CAUTION:
B ISOLATE THE MAINS SUPPLIES BEFORE
STARTING ANY WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS.
NOTICE:
Debris from the system can damage the
boiler and reduce efficiency.
Failure to comply with the guidelines for the
use of water treatment with the appliance
will invalidate the appliance warranty.
BEFORE CLEANING THE SYSTEM:
B Ensure that the system and pipe work is in good
working order.
B Where possible keep the existing boiler/circulating
pump in place when flushing the system.
FOLLOW THE GUIDANCE OF BS7593:
Treatment of water in domestic hot water central
heating and also the flushing guidelines below.
NOTICE: ARTIFICALLY SOFTENED WATER
MUST NOT BE USED TO FILL THE CENTRAL
HEATING SYSTEM.
FLUSHING THE SYSTEM
B Fill the system with cold water and check for leaks.
B Open all drain cocks and drain the system.
B Close drain cocks and add a suitable flushing agent
compatible with aluminium at the correct strength
for the system conditions 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.
B Circulate the flushing agent before the boiler is fired
up.
B Run the boiler/system at normal operating
temperature as directed by the manufacturer of the
flushing agent.
B Drain and thoroughly flush the system to remove the
flushing agent and debris.
B It may be necessary to use a power flushing machine
to aid the cleansing procedure in some
circumstances.
B Close the drain cocks and refill with fresh water and
a suitable inhibitor.
B Vent any air from the boiler and system.
6 720 644 741a (2010/10)
INHIBITOR
Add a suitable inhibitor or combined inhibitor/anti-
freeze, if the system is exposed to freezing conditions, to
the heating system in accordance with the
manufacturer's guidelines.
WARNING: Sealing agents
B The addition of sealing agents to the
system water is not permitted as this can
cause problems with deposits left in the
heat exchanger.
PRE-INSTALLATION
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