Nominal Heating Input; Flue; Flow Thermostat; User's Instructions - Vaillant VCW 2O Instructions For Installation And Servicing

6.4.2.1 Nominal heating inPut
The pressure must be as follows:
intetbressure:20
mbar (8.08 in' WG)
main burner pressure (cold and hot):
vcw 2011
vcw 2511
VCW-sine 18
9.0 mbar (3.61 in. WG)
9.0 mbar (3.61 in. WG)
10.6 mbar (4.26 in. wG)
The apoliance is regulated at factory to the
.b'ti"5i neating influt. Therefore it is not
n"lJ""urv to a[6r thb setting of .input or output
"itne g"d gouernor during installation'
1 pilot adiustment screw
2 pilot gas filter
3 DC solenoid
+ main burner Pressure test Point
5 gasgovenor
6 blocking Plate
7 inLipti.irte test point (near rear plate)
6.4.3 Flue
Check that there is no spillage of products,of
JomOustion from the down draught diverter by
carryinq a spillage test as detalleo In t:D
il6'
i r. thppiicaote only to open{lued
aooliances.) Check appearance ol llames
In
lii,irl"-"iihrtish
thatihere is adequate air for
LturitLn,
check also as outlined under 3'5'3
ii'tn"l"li lriv tvpe of extract fan fitted'
6.4.4 Flame tailure device
Check the operation of the flame failure devic.e
"'"'ini donoiuoiler to ensure that the device will
"iir,li "tt sit to the main burner within 60
seconos.
6.4.5 Flow thermostat
Check the flow thermostat and all automatic
Jontiofs are operating satisfactorily' Readjust
controls to appropriate settings.
6.5 Water soundness
Allow the water system to reach maximum
woif<inq temperatuie and examine for water
iornon""... ihe system should then be turned
off ind rapidly drained while still hot' The water
iu.t". should again be filled and cleared of air
idcis. Sealed sistems should be adjusted to
the initial system design pressure of 1,2bar'
Examine for water soundness.
B
6.6 User's instructions
Hand the instructions for use to the user for
l"T"niio" unO instruct in the safe operation.of
ii.
aooriince. Advise the user of the
oi"cauiibns necessary to prevent damage to
ihe svstem and to the building if th-e system
JoLJ'not remain operative during frost con-
ditions.
Note: Leave installation and
servicing
instructions at the meter'
For continued efficient and safe operation,
"iirt-viiiii"ni ippliance should be serviced
liLaiion"e
a'vear bv a qualified servicing
company'
It is important and strongly re-comm.ended
that ariangements are made for a -!44!!!!9
ilt
cA-sr6ereLtwith a qualified servicing
ififfiv
to ensure regular servicing'
24
Please contact your senticing company'
Vo-u-r nearestVaillint office oryour
local gas
region,
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