heating system
f\
anti-vacuum valve
this method may only
be used if acceptable
to the Local Water
complies with
BS 6798
appendix A,
method A. 1.
stop
non-return valve
valve
test co&k
Fig. 12
heating system
overflow
L
cistern
Note :
Cistern to be supplied
-1
1-1
through a temporary
complies with
BS 6798
\
-7-w
. connection from the
----,A/
service pipe or cold
appendix A
stop valve
I
reducing valve
pressure pump
water distributing pipe.
method A2
(if required)
Fig. 13
3.9.1 Boiler replacement (retrofit)
3.11 Inhibitors
In an old system where the boiler is being replaced,
we recommend the use of a strainer, fitted with a
drain tap on the heating return, designed to retain
scale particles and other solid debris. It is godd practice
to use a chemical cleaner with a floctuating agent,
used as recommended by the cleanser manufacturer,
to clean the system before the old boiler is removed.
Chaffoteaux
Ltd do not generally recommend the
use
of inhibitors in systems using the Celtic FF boiler. It is
however, appreciated that the use of a corrosion and
limescale inhibitor may be desirable or specified.
The following are the appliance manufacturer’s
recommendations :
1)
Use only a British Gas or similar approved inhibitor
from the Fernox Manufacturing Company Limited
3.9.2 Existing systems
Valves and joints should be carefully checked for leaks
and the appropriate action should be taken either
as a repair or replacement. The old open system has
probably only been subjected to a pressure of 0.4 bar
or less. When you change to a sealed system where
the charge pressure will be 1.0 bar and the running
pressure exceeding 1.5 bar, consideration should be
given to the replacement of radiator valves with a
pattern capable of sealing at the higher pressures.
3.10 Cylinder
Where a domestic hot water cylinder is used with the
Celtic FF it MUST be of the Indirect and high recovery
type to BS 1566:Pt I. Single feed cylinders are not
suitable for use with this appliance. Flow and return
pipework to the cylinder should be in 22 mm copper
pipe.
Britannica Works, Clavering,-Essex CBl 1 4QZ -
Tel : 0799 085811 ; Grace Service Cheminal, Grace
Dearbon Ltd - Widness - Cheshire WA8 8 UD
Tel : 051 424 5351 - Telex : 627 341 - Fax : 051 423 2722
2) Use only the quantities specified by the inhibitor
manufacturer.
3) Cleanse the system as required by the inhibitor
manufacturer.
4) Add inhibitor only after flushing when finally
re-filling
the system.
3.12 Add-on devices
It is important that no external control devices eg.
economisers be directly fitted to
this appliance unless
covered by these installation instructions or agreed
with the manufacturer in writing. Any direct connection
of a control device not approved by the manufacturer
could make the guarantee vaid and also infringe the
Gas Safety (Installation & Use) Regulations 1984.
12
To Next Page
Loading...
