Cleaning Primary Systems - Bosch 12/18 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.
7

CLEANING PRIMARY SYSTEMS

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
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.
FLUSH THE EXISTING SYSTEM WITH A
POWER FLUSHING MACHINE OR WITH A
CHEMICAL CLEANER BEFORE
INSTALLING NEW COMPONENTS.
CLEANING THE PRIMARY SYSTEM:
Cleanse the system in accodance with
BS 7593.
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.
8 716 113 389b (09/07)