Water Treatment - Worcester GREENSTAR 12i Instruction Manual

34

WATER TREATMENT

IMPORTANT: ARTIFICIALLY SOFTENED WATER
MUST NOT BE USED TO FILL THE CENTRAL
HEATING SYSTEM.
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i/24i System
WATER TREATMENT
IMPORTANT: Debris from the system
can damage the boiler and reduce effi-
ciency. Failure t o comply wit h t he
guidelines for the use of water
ment with the appliance will invalidate
the appliance warranty.
ENSURE THAT THE SYSTEM HAS BEEN
CLE AN E D AS ON PAG E 6 OF TH E S E
INSTRUCTIONS.
FLUSHING (Central Heating):
Switch off the boiler. If connected to an
open vented system turn OFF the water
supply to the system header tank
Open all drain cocks and drain the
system while the appliance is hot.
Close drain cocks and add a suitable
flushing agent at the correct strength for
the system condition in accordance with the
manufacturer's instructions.
Run the boiler/system at normal operating
temperature for the time stated by the
manufacturer of the flushing agent.
Drain and thoroughly flush the system to
remove the flushing agent and debris.
INHIBITOR (Central Heating):
Check drain cocks are closed and all
radiator valves are open before adding a
suitable*inhibitor (or combined inhibitor/anti-
freeze if the system is exposed to freezing
conditions) to the heating system water in
accordance with the manufacturers instructions.
* compatible with aluminium. The pH
value of the system water must be less
than 8 or the appliance guarantee will be
invalidated.
If connected to an open vent system turn on
the water supply to the system header tank
and allow to fill the system.
If connected to a sealed system fill via a
WRAS approved filling loop to between 1
and 2 bar.
Vent all radiators; Re-tighten vents when
complete. Vent any air from the boiler
heat exchanger using a suitable container to
collect any water.
Ensure tube outlet is directed away from
the fan or any other electrical
component to prevent damage.
Vent all radiators and the primary side of the
hot water tank.
For sealed systems re-pressurise if necessary.
Turn pressure relief valve anti-clockwise until
the pressure is 1bar.
Set all controls to maximum.
Record the date when the inhibitor was
added to the system on the guarantee card.
NOTE: The concentration level of
inhibitor in the system should be
checked every 12 months or
sooner if system content is lost.
The addition of sealing agents to
the system water is not
recommended as this can cause
problems with deposits left in the
heat exchanger.
8 716 115 167b (03/2009)
treat-