Worcester Greenstar 12i System Instruction Manual page 55

THIS PAGE SHOWS THE SEmNG PROCEDURE FOR THE DUNGS
VALVE FOR ALTERNATIVE VALVES SEE PAGE 52 FOR PRETTL AND
53 FOR SIT.
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WHEN RUNNING IN SERVICE MODE
NOTE: When filled with lhe optional
dlverter valve (not supplied) end
running In service mode, the boller
will operate both central hNIIng and
hot water circuits.
If fitted to an S or Y plan system, the
system must only be run In central
heating mode.
~ORCESTER
BotdiG~p
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33.1
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Test
Nipple
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33.2
33.3
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33A
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SETTING THE GAS I AIR RATIO
FOR DUNGS GB·ND 055 DOt S20
33. Setting
the C0
2
Note:
When
rumiog
in the setvlce mode.
the
boiler will operate bolh lhe central heatang &
OHW drcurts. This is to alow suffictent
bme
few
the
setmg procedure. H will
be
necessaty
to
run
sufficient watef through the OHW t1tCu1t to
ensure tl\at the boilet will not cycle on low
healing demands.
33.1
Coonect
manomete<
to
Inlet
pressu"' point
on the gas valve.
• To adjust tho C0
2
a wil be
nec:euary
to
first
opemte
the
boiler at maximum output.
• Press
and
hold down the !eMce bottDn
W
1 01
1 0 seconds ll"'til ilhsninated.
The
blve fXIWOt
indicator
will
flash.
33.2 Tum cent,.! heating
oontrol to
ma>dmum;
the boUer wll
then
go to maximum output.
NOTE:
The oontrol will resume nOfm&l operation
after 15 mii'VJte$ or if the service bJtton I$ proo$0d
for
OYer
a second
33.3 Using a 2mm hexagoMI bAll driver set tl'le
C0
2
via adjuster (8)
usi~
table below.
C02 settings
for
Greenst1r I System
N ~ CO~
should be measured after
1 0
minutes
Gas
~""
C02 setting C02 soltlng
mtx. l mum minimum
Natural
gas 9.8%
±
0.2'M> 9.2%
±
0.2'M>
LPG
11.0%
±
0.2% t0.5%
±
0.2'M>
CO • less
than
• Oleck
co"
less
than~
• Meas<re
the
lnlelp<essure;
it
shoulcl
be no
less tim
18.5<00 NG
or
37mb
tor LPG.
33A Set
the
ca~ballloatrng con ..
ol to ..........,.
The
boiler
will go to
mi'lim~o~n
powtK.
33.5
Meas<re
the
CO,
lind ched<
aganst
the
--Kr~~(C)onthegos
~ us;ng o 2mm
heMgonal
bel
drMtr,
until the ClCI<1ect - •
Is
"'l
• Retun
to
ma>dmun lind re-cllodc the CO, K
coned press ond hold down
the ......,.
bottDn
for 2
seconds; the
b.ltton
wi1
ooase to
be
illurrinated
and the
blue power lndlcat01 will
be permanentty illuminated.
• Rem:rve
manometer aocl re-seal inlet pressure
point on gas vatve.
• Rtrassemble and tefit holler case.
REPLACEMENT OF PARTS