Change Of Pump Head Only; Change Of Gas Section; Balanced Flued Appliance; Change Of Gas Governor - Vaillant VCW 2O Instructions For Installation And Servicing

0
8-18.2 Change of pump head
onty
Drain the appliance as under
8.1 and g.1.2.
lsolatethe appliance from the
electrical mains.
t-lpen the terminal box of the prmp.
fVoie it-e
ggroyr code of the wirins ano'oisc[nn6ci
iii!
p:llp,_ connecrion cabie. un.,jr"*
.jr,L.',i
L"l:ll,lS screws (p6) ano p.urr otr p-ump.ijE"o]
$":F:Ti_{{t,yiHl3lfl
lHrJvJisy*siEb
n^eassemble in reverse order.
Ta-ke;;;not to
oamage the packing ring.
Check - earlh continuitv
- polarity
..
_ resistance to
earth
3iT'fl0flr,'#PTRUcT|oNS
FoR BRrflsH
8.19 Change of gas section
$H:3}lFift?:dif"tj3,.iil?i,i!:ffi
","
d iscorin
ecti ns tn 6..i il ioii' i,fi 3i ) :fi :.{li"J JJ
i6fi"'o
by toosenins tne e ieiainiis;;"";
8.19.1 Batanced flued appliance
i""Jl:;"J:TiH"","#J:"{t?il
pirot assembrv
8.19-2 Open flued appliance
*ruy:
the pitot suppon.by unscrewinq
the
l"_r3ll'.19 screw (G3)'and ihe ,;i;.'fi;;;
lAli'9y;^l"move ihe a reiainiii' #;;:
(\rz+r, reptace valve seating,
springi ;t". ;;
fiffi3,l",3"assemble
in rev"'i" oio"i ,lsin'd
Check connections for gas sounctness.
8.20 Change of gas governor
8.20.1 Balanced flued appliance
l-l:lgy" gas section as in 8.19 and 8.19.1.
unscrew the 4 retaininc
3.'-T ?r." i; ;""; ###1,3ffi _($3ln
*3
I";l???rTr check c6nne"ii"""'iJi,'i!t
8.20.2 Open flued appfiance
,T:fy:
the, main burner as uncter
8.2.1.2.
y_1s_9r9*,
. tle
retaining screws
-
?d;;:
.l?^1.j9r91" in reverse
'orOer,
using
.iJ#
wasners, if necessarv.
Check connections
for gas soundness.
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