Cleaning Primary Systems - Worcester GREENSTAR HIGHFLOW 440CDi 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.
6

CLEANING PRIMARY SYSTEMS

CLEANING PRIMARY SYSTEMS
IMPORTANT:
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:
ENSURE THE SYSTEM AND PIPEWORK ARE
IN GOOD WORKING ORDER.
USE THE EXISTING BOILER/CIRCULATING
PUMP WHERE POSSIBLE OR USE A POWER
FLUSHING MACHINE TO AID THE CLEANSING
PROCEDURE BEFORE INSTALLING A NEW
BOILER.
CLEANING THE PRIMARY SYSTEM
IMPORTANT: ARTIFICIALLY SOFTENED
WATER MUST NOT BE USED
TO FILL THE CENTRAL
HEATING SYSTEM.
Fill the system with cold mains water to
the recommended pressure and check for
leaks.
Open all drain cocks and drain the system.
Close drain cocks and add a suitable
flushing agent at the correct strength for
the system condition in accordance with
the manufacturer's instructions.
Circulate the flushing agent before the
boiler is fired up.
Run the boiler and system at normal
operating temperature in accordance with
the manufacturer's instructions.
Drain and thoroughly flush the system to
remove the flushing agent and any debris.
INSTALLATION & SERVICING INSTRUCTIONS
8 716 115 219c (03.2010)