Water Treatment - Worcester Greenstar Ri User Manual

1
A
2
E
3
F
4
I
KEY
Valve
Flushing
Agent
Inhibitor
29

WATER TREATMENT

5
B
C
D
L
7
G
H
8
Q
J
K
M
N
O
P
R
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR Ri
WATER TREATMENT
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.
ENSURE THAT THE SYSTEM HAS BEEN
CLE AN E D AS ON PAG E 7 OF TH E S E
INSTRUCTIONS.
FLUSHING (Central Heating):
1 Switch off the boiler (A). If connected to an
open vented system turn OFF the water
supply to the system header tank
Open all drain cocks (B) and drain the
system (C) while the appliance is hot.
2 Close drain cocks (D) and add a suitable
flushing agent (E) at the correct strength for
the system condition in accordance with the
manufacturer's instructions.
3 Run the boiler/system at normal operating
temperature (F) for the time stated by the
manufacturer of the flushing agent (G).
4 Drain (H) and thoroughly flush the system to
remove the flushing agent and debris ( I ).
INHIBITOR (Central Heating):
5 Check drain cocks are closed ( J ) and all
radiator valves are open (K) before adding a
suitable*inhibitor (or combined inhibitor/anti-
freeze if the system is exposed to freezing
conditions) to the heating system water (L) in
accordance with the manufacturers instructions.
6 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.
7 Vent all radiators; retighten vents when
complete (M). Vent any air from the boiler
heat exchanger using a suitable container to
collect any water (N).
Ensure tube outlet (0) is directed away
from the fan or any other electrical
component to prevent damage.
8 Vent all radiators and the primary side of the
hot water tank (P).
For sealed systems re-pressurise if necessary.
Turn pressure relief valve anti-clockwise until
the pressure is 1bar (Q).
Set all controls to maximum (R).
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.
* compatible with aluminium. The pH
value of the system water must be
less than 8 or the appliance guarantee
will be invalidated.
8 716 109 699a (05/05)