Vaillant VCW GB 221 H User manual

Dear Customer!
All you need to know aboutyour Valliant Combi is conta.inedin these instructions, so thatyou will find:
In the left hand column, aseries Of
illustrations demonstrating step by step
the whole procedure. ·
Introduction
/r1 the centre column a// necessary
information
which explains the11/ustrated
procedure.
In hand column, additional
information whichmay prove useful for
servicing and
handling;
Please note that your Valliant COMB! Compact boiler must be installed by a competent person {L e. CORGI registered), in accmdance
with
the current issue of the Gas Safety (Installation and Use} regulations 1994, as amended.
Your boiler requires air for combustion and to ensure safe and efficient operation of the flue.
Do not obstruct any purpose provided ventilation openings to the outt;ide air.
This appliance must be earthed.
Ifthe appliance is installed in a compartment do not obstruct any purpose provided ventilation openings; and do notuseJor storage
purposes.
If a gas leak or fault exists. or is suspected, turn offthe appliance and consult your local Gas Region or Service Engineer.
As the colours of tile wires in the n1ains lead of tills appliance may not correspond with the colowred markings identifying tile terminals
in your plug, proceed as Follows:
• The wire whic!1 is coloured must be connec::ted to the terminal in the plug which is marked with the letter Eor by
the earth symbol @ or coloured green-and-yellow.
e The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black:
• The wire which is coloured brown mustbe connected to tl1e terminalwhich is ma.rl<edwith the letter Lor coloured red.
The following minimum clearances around the appliance case must be maintained.
80 mm (3.2") either side. The side clearance may bereduced to 25 mm {1 ")from removeable fittings such as kitchen untis.
150 rnm (6") below
100 mm (4") above
2

[PREPARATION·-·FOR STA:.:;...::R_;;_;:TJ:.::...::N..=.G ___ _
Check of supply pipes
Ensure cold water shut-off valve@ and
both the flow and return service ®
and @ are open. Also checl< that the gas
service
(J) is open. Turn QOid water
shut off
valve anticlockwise to open.
Check of water contents
Open the lower door by pulling outwards.
Check the water contents of the system.
The white hand of the pressure gauge Q)
should be within the green band (about
1
to. 1.5 bar). If the hand is on or below the
mark (about 0.8 bai') when the system is
cold, then your· installer should be called
to refill the system.
{The pressure may
increase when the appliance is in
Normally the flow. return and gas service
cocks are open, and the line marking wilr
have the same direction as the pipe.
Topping up should only be carried out by a
servlqe engineer or your
installer.
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.. _______ -·- --_-_-_-_ .. -_ .. ·-·-_·· _ .... -_ .... ____ __,
4
To light the pilot
Op!';n both doors to the appliance. Press
the push button® hold it down. Light the
pilot by operaJing the pieZo ignitor@)
several times.
·Checkthaf
the pilot is alight by looking
through the viewing
window®.
After pilot ignition, keep the push button®
depressed for about 10 seconds.
If the pilot does
not light,llold ®
depressed for a longer period to allow any
airto escapefrom t!1e pilot line and operate
tM piezo igniter several times.lft!wpi!ot
flame goes outwhen button® is released,
WAIT AT LEAST 3 MINUTES
before repeating the pilot lighting proce-
duns.

DOMESTIC HOT 1\....:..::T....:..::IO:=:...:N:...::__ ________ _
----···-··-----··········--····· ....................... 1
Switch on main switch
Ensutelleating switch@ and. main switch
@are off (position
0}.
Turn the elecficity supply on. Pusl1 main
switch@ into position L
(main switch lights up).
Attention
The main switch should only be operated if
'-as described under "Check water con-
tents" on r:>age3-the appliahce is correctly
filled with water. Otherwise the heating
pump may be damaged.
To obtain hot water
Onopening hot water tap@ at a supply
point
(basin, shower, sink) the Combi will
light after an initial short delay. Witli the tap
fully open, should receive the maxi-
mum flow rate of hot water. With the tap
only approx. hajfopen, a lower flow rate
may be achieved .. By mixing in cold water
you
can adjust tq any required lower
temperature.
On closing the tap the
appliance automatically cuts
out. or
changes
to heating, if set to do so, After
opening
U1e upper door by pulling out-
wards, tile operation of the burner can be
seen through vlowing window Q_p.
At this stage your Vaillant Combi is ready
to supply hot water.
Wl1en the main switch lights llp, the app-
liance can be opetated.
If the hot water flow rate appears reduced,
check
-cold water shut-off
valve is completely
open.
- arty valve.s fitted between tap and
appliance are open.
- spout outlet is n()t blocked.
Note: Boiler will not light atvery low flow
rates.
Tile· supply of hot water takes precedence
over the heating system, yet has
no distur-
bing effect
on tile steady heating of your
rooms for normal periods of use.
5

I TEMPERATURE SELECTOR · I
6
Set the domestic l1ot water temppraturo
selector .f.9 a$ follows:
The domestic hot watertemperature can
be increased by reducing the. water flow
rate from the appliance. Turn the. knob anti-
clockwise.
Tt1e domestic hot water temperature can
be reduced by increasing the water flow
rate from the.appliance.
Turn the knob ClockWise;

I HEATING-OPERATION
Set the flow thermostat
The flow thermostat knob® adjusts the
operating temperature.oi the boiler for
central heating.
Turn the knob:·
Clockwise to Increase boiler temperature,
the maximum setting is 9.
Anti-Clockwise to Decrease boiler
temperature, the minimum setting is 1.
For optimum control of your lwating
system
the follo;,ving settings are
recommended:
Setting room temperature
Set the room thermostat.@ or thermostatic
radiator
valve® according to the instruc-
tions supplied with the controL
.. ·--1
Spring and Autumn
Winter
EltoT
8to9
The room thermostat or thermostatic
radiator valves
:Will provide more accurate
and economic room temperature control
than
jqst the boiler thern1ostat.
7

[ HEATING OPERATION -··--···- .. -· ·-
8
Switching on the heating switch
Push the heating switch@ to I. The central
heating
system will then start if beat is
required. The system \Nill now operate
automatically and controls the
room
temperature according to the temperature
selected
on the bdilerthermostat or
external controls.
The flow thermometer® indicates the
temperature of the water in the central
heating circuit,
NOT of domestichot water.
On this setting your Vaillant Oombi will also
provide domestic hot water.
Note:
in the summer time, when central heating
is rioti"equired, push heating to
position 0
(OFF). ·
On turning the room thermostat or boiler
thermostat to a higher setting, the boiler
may not fire immediately. This is due to the
integral "anti-cycling" device
in the boiler
preventing rapid on and off operation of
the boiler.

[SHUTTING • CARE AND FROST PROTECTION
Note:
If outdoor temperatures are low, the high
efficiency of the f1ppliance (energy saving)
may lead tovapourformation on the ex-
ternal terminal of the
flue duct. This is a
normal physical phenomenon!
Care ami Maintenance
Clean the outer casing of the boiler with a
damp qloth
and a littlE? soap. Do not use
any abrasive or solvent cleoming rnateriaf
which could damage the casing or plastic
fittings. ·
To turn off the boiler
To turn off the central heating and hot
water for short periods of time
push the rnain switch @to position '0',
To turn off the the central heating only
switch off by pushing the h0ating switch
@to positiqn '0'.
(No1maf position during summertime!)
To turn oft central heating and hot
water for longer periods of time
push the main switGh@ to position '0'
and also press !he push button @to shut
off the pilot.
To ensure continued efficient operation of
the appliance,
it is recommended that it is
checked and serviced as necessary at re-
gular intervals. The frequency of servicing
will depend upon the particular installation
conditions
and usage, l:)ut in ger!eral once
per year should
be adequate. !tis the law
that
all servicing work is carried out by a
competent person such as British Gas
or
other Corgi registered persona!. Refer to.
the label on the appliance "Advice; Service,
Repairs" for details of who to contact
Frost Protection
Please ensure that, if you are absent during
a period offrost, the central
heating system
Should
you leave for alongertime (i.e.
?ummer holidays) you shpuld <;tlso close
the cold watersl1ut·off valve@, isolate
the electrical supply
and turn offthe gas
swpply.
The pressure relief valve @is provided for
safety
reasons and must not be Interfered
with.
remains ln operatioi) aM the roorns are
kept above freezing point.
It must then be remembered, however, that
the appliance will
be automatically swit-
ched off
by the monitoring devices
lfcertain faults
occur, e.g. interruption !n
tht:l energy supply (gas, oil, electricity) or
tau its in the flue gas system.
Alternatively, you can drain both the
central
heating system and the E\ppli<;ince.
We do not recommend the addition ofanti·
freeze to the system water, This could lead
to deterlot'ation of seals and diaphragms
as well as to noisy operation, forwhfch-
lncluqing any consequentil;l.l damage-
we cannotaccept any i·esponsibility.
9

I FUEL SPILLAGE SENS9Rtonlytorvcwg_B240,200}q --·-· -------
These Vaillant open flued central heating
boilers are fitted with a. flue spillage
sensor. In the event thatflue.gasesare not
properly drawn into the flue system the
flue spillage $ensor will automatically shut
down the appliance,
If the bOiler shuts down for any reason,
operation will be prevented for between
15 and 20 minutes. After 20 minutes it will
be possible to use the appliance in
accordance with the instruCtions for use.
IMPORTANT
In case of a repetive boiler cut-off,
disconnect the
main switch and charge a
qualified fitter with the appliance check.
If the appliance repeatedly shuts down
do
not use It and consultyour qualified
installer or service engineer.
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