Worcester Greenstar 12i System Instruction Manual page 53

THIS PAGE SHOWS THE SETTING PROCEDURE FOR THE PRETTLE
CE427 VALVE (WITH SEPERATE ADJUSTER) FOR ALTERNATIVE
VALVES SEE PAGE 153 FOR SIT AND 154 FOR DUNGS.
29.1
I
I
--w·
I
I
/
'
' 6
'
I
'
•
I
I
'
•
r - -
'
I
•
I
I
'
'
,- '
/
L--""
'9
.,.
__
...
•
I
•
I
•
•
•
•
'
'
'
A
'
'
'
-
...
..
-
.. ..
------·-··---- -----------------~
: Ple.ue note: The fttJe gs.s 1 es1 po.nt can be'
:oooeosed
on the ..,pianco
~ - Ill'
•
' remoYing
cap
D
WHEN RUNNING IN SERVICE MODE
NOTE: When fitted with the optional
dlverter valve (not supplied) and
running in service mode, the boiler
will operate both central heating and
hot water circuits.
If fitted to an S or Y plan system, the
system must only be run In central
huting mode.
~ORCESTER
8osdtG~p
•
I
•
\
'
\
'
I
'
'
I
•
I
•
I
•
\
•
\
'
'
'
'
'
'
'
•
•
•
29.2
29.3
'
•
I
•
I
•
I
•
I
I
I
29.4
•
•
•
•
•
29.5
'
'
'
•
I
•
I
•
I
•
I
•
I
I
I
SETIING THE GAS
I
AIR RATIO
FOR THE PREITL CE427
29. Setting the C0
2
Note: When I'Ur'lning in
the
sef'Ace
mode.
the
b<>ilef
wm
operate
both the
cenltal
heating &
OHW
Clr'O.ats. This
is to allow sufficient bme fOt
the setting
~e. H
wil be
necessa.y to run
water llvoogh the DHW cifrut
to
enSUte
lhal
the boier wil
not cycle
on low heating
demands.
29.1 CoMed manometer k:t inlet pressure po.nt
on the gas valve.
• To adjust
the C0 2
~win
be necessay
to
litst
opetate
the boiler at maximum output.
• Press and hold d<>NI'lthe seMc:e btiton
(A)
lor
1 0 seoonds unt~ iluminated. The blue power
indicator wiU nash.
29.2 Tvm the temperet....e oontrol to
m&ldm~..m;
the
boiler wiH then go
to
maxim"'" output
Note: The control will resume normal operation
af~r
15 minutes
0 (
if the seMce button Is pressed
for over a second
23.3 Using a flat blade screwdriver set the C0 2
via adj uster
(B)
using table below.
C02 settings for Greens tar I Syst•m
Nore. CO, should be measured after tO minutes
Gas type
C02 setting C02 setting
maximum
minimum
Natural gas
9.8% ± 0 .2'M>
9.2%
:1:
0 .2%
LPG 11.0%±0.2% 10.5'1b
:1:
0.2%
CO • less than 200ppn (0002 raUo)
• Ched< CO is less than 200ppm.
• Meo'$¥e the inlet
pressure.;
4 should
be
no less
thon 18.5mb NG
or 37mb for
LPG.
23.4
Set
t>e 1etfC>eCa1ure
control
to
minimum.
1lis . . maf<e the bolet
go to minimun powor .
23.5 ...... .,.
the C(),;
~
shooAd , _ be II tho
figure
for
,.,....,m
outpul M
not adjust
(C)
on
the
gas.- unit oorrect.
>
Rell.m
to
nwim..m and
r..-t<
the
CO,.
H
C<><Tecl press ..... hold d<>NI'lthe -
button
lor 2
5eW1ds; the
button
will
cease
to
be iiiLmina!ed and tho .....
po;<<Jtindica!Ot wl
be
pennanenily - - ·
• Remove: manometer and
re--seal inlet
pres.sure
point
011
gas""'"
• Fit
new plastic
sealtf9
cover on
to outlet
aquster (B}
•
F~ wh~e
COOiel
00/etval.,..
aquster (C) and
secure with black security
tag.
• Remov& red arrow from data plate and fit new
one in correct position for gas
type.
• Re-assemble and refit boiler case.
• Re-conn&el mains el&elrical
supply and
check boiler operation as stated In the
commissionillQ section.
• Fit ntm label from kil t:Ner existing label on the
ar:pliance bottom panel.
REPLACEMENT OF PARTS