Water Systems & Pipework - Worcester Greenstar 12i System Instruction Manual

IMPORTANT: The optional lnt.,n•l dlverter valve thould not be used with an
unvented eyllnder unless 1 zone v1tve Ia fitted In
the
flow or return to the
cylinder to comply with unvented cyflnder regulation..
S PLAN LAYOUT
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WATER SYSTEMS & PIPEWORK
PLASTIC PIPEW ORI< & UNDER FLOOR
HEAnNG:
• Any
plastic
pipewor1< must have a polymeric
barrier
whh 600mm (minimum) lerog!h
of
copper or steel pipe connected 10 the boiler.
• Plastic pipeworl< used for underftoo1 heating
must
be
correctly
oontroled with
a
lhermoot.tic blending valve limitrng tire
tempera!ure
of the oirouita 10
apptox.
60"C.
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CONNEcnONSIVAU/E$;
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0
t
Boiler flow
SYSTEM FILL
~ORCESTER
eo.dtG~p
Ia 1
' 1 81
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Y PLAN LAYOUT
WITH EXTERNAL DIVERTER VAlYE
SYSTEM LAYOUT
WITH OPTIONAL INTERNAL DfVERTERVALVE
FITTEO
(NOT SUPPUED WITH BOILER)
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l1
t
Return from
cylinder
I
8'.1
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J
I
t
Retum fi'Om
control hHtl"'f
SYSTEM MAI<E UP
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• AI syst"" ~.
tapa and
nirring
YaNes
must
be~
of ... taining a
pressu'e up to 3
bar.
• Radiator
YaNes sho<Jid
CO<rlorm to
652767:10.
• All other wiYes should confcrm to BS 1010.
• On new installations TRVa must
be ueed
on
all radiators except where a room thermoetat
is sited.
On
all installationa they ahould 11
least be fitted in the
aleeping
01eas.
See
note
below on open radiator/bypass
• A drain cock is required at
the
lowest point
on the system.
• All air vent is required a t the highest point on
the system.
Sand
Y
PLAN
SYSTEM:
• NB The boller Is fitted with tts own lntemal
bype$$.
A Oiverter Vatve
B Radiator Vatve {Flow)
C lookshield Valve (Retum}
• NB A
drain oock should be fitted •t tho
l owest poi nt of the heating
ci rcuit
and
beneath the
appliance.
OPTIONAL INTERNAL DIVERTER VAI.\IE:
This boiler is designed
to operate on a aealod
system only. The boiler will require
1
second
retum
pipe
from the w•1er cyinder 10
the wall
mounting ha.me and terminate in 1Snm copper
~
• The
CH sealed syst..,
must
be filed using
1
WRAS approved filing loop
0<
con.,ty with
tire
diagram opposite for oystem
Iii.
• Where the system vobne ie mote than 100
litres or eXICeeds 2..65 bet at muimum
heating
te..,.,aQBe. an elltra
._;on
""saef
(B)
must
be llted
as
dose •
poo1ible
to the appliMoe in the control healing r .. um.
• Press<Jrise the extra expansion vessel (B) to
the
same figW"e as
the
eq)ansion vessel built
in to the appliance.
• Do not
use galvanised pipes
or radiators .
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WATER SYSTEMS & PIPEWORK