Vaillant VCW 25 1 T3W, VCW-SINE 18T3W, VCW 20 1 T3W User Manual

Instructions

for Installation

and Servicing

Vaillant

Combined appliances

for

heating

and

This aooliance shall Codes of

CORGI

These the installation

Practice by British Gas or by an

member)

instructions should be left near the

be installed in

is completed.

accordance

authorized

gas

domestic

VCW-sine 18 T3 W

with the relevant

installer

meter when

hot water

VCW 2Ol1 T3 W

GC-No. 47 04403

VCW 2511 T3

GC-No. 47

GC-No.

Domestic hot water

04405

47

O44 01

Central

W

heating

Contents

lntroduction

1.

2.

Construction

J.

General

4.

lnstallation Water Commissioning Assembling

7. Servicing

8.

q

Foult

10.

Short

11.

Technical

2 Construction

of aPPliance

reouirements

boiler

of

circulation

combi

of

finding

ports

list of

data

system

and

heater

testing

of

P4e The

2 natural draught

2 4

^l ;\ ;; ,;

46 61 64 system

ApPliance

1 lntrcduction

Vaillant csnbi

VCW-sine, instantaneous

Output The

open ahd sYSIem.

Circulating devices

Note to ln hard supply

room-sealed)

ratings are shown

is designed

boiler

vented

includes

pump,

only),

provided

are Installers

water areas

to the appliance

boiler

open-flued

domestic

system

the instantaneous

expansion

terminal

wall-rnqrrH

is a

(or

in the case d

with buifr

boiler

hot water

in

for use

with

box,

with

we recommend

via a

is

heater,

"Technical

in

a sealed c

pumped

(forseald

vessel

control and

the appliance.

scale

Dda-.

circuldin

w&

hot

sdetf

the d

reducer.

it

2

trin I

-24

9 11

23 22

14

18 19

21

o

N

3

o

l Fkrcorinection 2 Down draught diverter 3 Sensorof 4 Mainheatexchanger 4a

Combustion Main hrmer

5 6 Gasgovernor 7 Flowswitch

Differential valve

8

DC

9

10 Fbwthermometer 11 Pump 12 Pressuregauge

\a-

l

vent

air

overheat cut-off

solenoid

with

automatic air vent

points

chamber

device

Terminal

13 14

Switch switch, domestic hot water switch) Domestic heat

15

Flowthermostat

17

'18

Pressure relief valve

19

Service cock

20

Gas service cock Overflow

21

Push

22

Push button stop

23

Pilot burner

24

Piezo unit

25

box

(main

board

exchanger

(optional

button start

switch,

extra)

heating

o o

'6

=

o

General

3

The accordance the Gas tions, the

It

vant

relevani British

CP 331

BS 5376

BS

3.2

3.2.1 The

oermit ierminal. adequate around

electrical with boiler

Where be

give A

Safety

l.E.E.

Water Undertaking.

local

be

should

requirements

recommendations

Standard

Installation

lown

Part

Selection of gases).

Part

Central

5449

oremrses.

Part

Location

Vcwqjle

location

the

The

space

the installed attention l.E.E.

in an

boiler specifically board that

Details compartment instdllations

in any

is cjrawn

Regulations

provisions

respect

in a room

installation

the

unusual

necessary

detailed

compartment

must

iompartment

or

modified

it is

of

requirements

documents

the combi

of

with the

Begulations.),

Regulations, in accordance

the

of

Codes

of

gas,

Low

3:

pipes.

and

gas

space

2 Boilers

exceeding

heating

1 Forced

syslems.

(8.F. APP|iance)

dhosen

provisions

location for servicing

The combi

heater.

room,

to

of

the

to

containing

location,

BS

and

guidance on

used

be designed

purpose. An existing

this

for

the

for

essential

design

given

are

boiler

relevant

for

installation

including

requirements

and

also

local authority

of

Practice:

of

pipes Pressure

installation

heating

rated

of

60

circulation

the combi

satisfactory

of a

must also

and air

although

the requirements

in Scotland,

and,

the building

bath or

a

combi boilerwill

of the

special

5546 and

this aspect.

to enclose

and constructed

may be

purpose.

features

in BS 5376

must be

regula-

building

the byelaws

with any

the

and

(1

. and

kW. for domestic

boiler

of the combi

procedures

used

of

airing

rele-

the

and

following

meters installation

2. family not

inPut

hot water

must

boiler

flue

provide

circulation

may be

particular

of

regulations,

shower.

may

BS 5376

the combi

cup-

provided

cupboardi

cupboard

: 2.

cP

in

of

BS 5440

ot

BS 5446:

for

We connection sealed ditional obtaining 3 .)

It is

by competent above correctly

your ihat the

3.2.2

The

permit

bdequate

provide

circulation

The combi

the

containing

the

recommended be

the combi

special

be

5'326 this

: 2

combi specifically bbard that

Details

compartment

installations

342 Centralized

Part

Part 2

hot water

1 Individual

Buildings

dwellings.

Flues

appliances

60

ding

Part 1

kW

Flues

of

(1.

rated

and

air suPPlY

and

Part 2 Air suPPlY.

1979 Installation

supplies

like to drawyourattention

primary

and

8

Safety

Gas

the law

regulations.

own

VCW

location

fitted

:2 and

aspect.

boiler or iompartment

it is modified

the

for

circuit

water undertaking

upon a

consentfora

(1)

from

Regulation,

that all

persons

lead

bould

interest

law is complied

(O.F.

chosen

provision

the

air supply.

adequate

around boiler

bath or

a

that

in a bedroom.

boiler

procedures

BS 5546

A compartment

must

this

for

of essential

design

are

of

for domestic

filling or

from

relaxation

the Secretary

gas

appliances

in accordance

Failure

prosecution. This

to

that of safety

and

with.

APPliance)

for the combi of a satisfactory

The location

space

the appliance.

not be installed

must

shower.

the combi

Where

in

be

will

may be

give

be designed

purpose. An existing op-

may be used

purpose.

for the

features

including

given

in BS

suPPlY

dwellings,

than

other

for

input not

familY

2.

gas

hot

PurPoses

tothefactthd

replenishing ol

a supply

1972:

to

for servicing

an

detailed

pipe

seeking aa

otits

of State.

are

install appliar a

to erisG

boiler

must fu

In addition,

should

boiler

installationd

the

unusual

necessary

guidanceot

to enclosete

used

and construec

of cupboard

cupboad

airing

: 2.

5376

is

can

Byeh

ins{d

with t:

b L

nrrsl

flue ad

ard *

rqq

in a

it

rd

posilb\

and BS

provided

a

,

b

supply

Gas

3.3

3.3.1 Service The

installation

planning

gas

local

4

pipes

region should

in order

stage

be consulted

at the

to establish

availability

the An existing

prior

out

consultation

an adequate

of

service

pipe

with the

must

gas.

of

supply

not be used

gas

local

regiorl

wit>

Meters

3.3.2 gas

A

meter is

connected

gas

local

the contractor.

An

existing

that it is capable of

2.95 ms/h

(or

3.38

2.47 melh

installed.

Flue

3.4

Detailed in BS

5440

give general

to

VCW-sine

3.4.1

\=i=

The

boiler

terminal is Termination should be on a clear expanse

wall; the terminal being

600 mm projecilon.

Do not install the terminal: Within

a)

from the vent,

b) Within

ground Within

c)

the terminal.

lmmediately

d) Where the lowest

than 2 m balcony, flat roof access, guard

of durable

guard

is available as an optional extra with combi boiler. The air inleVproducts and the terminal of the boiler must not than 50 Detailed recommendations

combustible

VCW

3.4.2 Detailed recommendations for fluing

in BS 5440 : 1 . The following notes

give general guidance.

to The

cross sectional combi boiler must be not less the flue outlet of the appliance. An supplied to allow the fitting of 125 mm pipe

or 125 mm light When fitting flue connector disconnection of

16).

fig.

region

meter should be checked to

(106

(122

mslh

(89

CFH)

system recommendations for fluing

: 1. Thefollowing notes

guidance.

(B.F.

must be installed so that the flue

exposed

(2

ft.) awayfrom acorner, a recessora

mm

300

bottom of an openable window,

or any other

mm

300

level.

600 mm

beneath eaves or a balcony.

(6,6

ft.) above the level

mm

material

(O.F.

must

or

material.

(2

in.)

Appliance)

the terminal must

to the

a local

or

passing

CFH) before the VCW

CFH) before

the VCW-sine 18)

before

Appliance)

to the external

preferably

(1

ft.) measured

ventilation

(1

ft.)

above adjacent

(2

ft.) of any

part

the termlnal

of

place

to which

protected

by

A terminal

to combustible material.

on

given

are

area of

asbestos cement

pipes

fitted

be the flue

in BS 5440 : 1.

the flue

than the

a split

to ensure

pipe (see page

pipe

service

gas

region

ensure

an additional

the VCW

not less

opening.

surface facing

of any

Drotection

are

intended

are

air.

vertically

is less

ground,

people

protective

outlet duct

be closer

are

intended

are

fitted to

area of

adapter is

steel flue

flue

socket

25

given

than

have

by

the

given

the

pipe.

easy

13

lnstallation

3.3.3

by

Installation

with CP

must a smaller

20

connection.

or

The

is

soundness

Flue from

a) Asbestos cement, b) Aluminium c) Cast-iron

lf double-walled flue

of

a type acceptable to British lf

that is acid-resistant with acceptable if the 540 materials in

air

connection chimney or lined with a non-porous material it should be lined with

flexible flue liner or any type acceptable to British meter in the technical mustbe kepttoaminimum. lf to be connected

a

draught diveder a flue constructed from above should draught diverter and

Before inserting a liner into,

of

previously swept clean of any soot register fitted connecting the liner into, the flue.

The the relevant 5440:1, table 4.

A terminal found fitted

The 600 or any other ventilation

331

Pipework

be of a adequate

complete installation

pipes

one of the following materials:

lined.

a chimney

composed of or lined with a nonporous

salt-glazed earthenware

: 1 .) A flue

is to

of the liner must

connecting the combi

plate,

in the flue, it must

flue should terminate

satisfactory by British

the flue

at

point

(2

mm

pipes

should

:3.

from the meter

than

size

as described in the

fittings

and

or stainless steel,

acid-resistant

is

used it

material.

pipes

pipe

a) to c) above

to lined

be used which is not composed

data and the number

directly to the combi boiler

one of the materials in

form

the connection

used, the flue must

restrictor

combi boiler to, or inserting

recommendations

of a type

outlet.

of termination must ft.)

of an openable window,

fitted

be

in accordance

to the

size. Do not

the

should be constructed

pipe

is

preferably

comply with BS 65 and

constructed from

should

chimneys. Where

other

Gas.

not be less than

flue

liner.

a flue that has been

and

plate,

that has

opening.

combi

use

combi boiler

must

be tested

above

vitreous

used it should be of

Gas.

should be one

(Chimneys

pipes

one of the

form the initial

acid-resistant

a stainless steel

liner

that is of a

The internal

thefluelinerisnot

pipe

which is

between

boiler

be thoroughly

loose material. lf

damper etc.

be removed before

in

accordance with

given

been tested and

Gas

should be

not be within

boiler

pipes

gas

Code.

enamel

lined

dia-

shown

joints

of

to

a)

the

to,

in BS

air vent

of

for

are

a

of

c)

or

a

is

a

c

Air supPlY

3.5 Detailed

given in intended

3.5.1 The

located vent an adiacent

itself i-n" same

3.5.2 Where

cuoboard are case combustion compaftment

recommendations

BS 5440

give general

to

Room

or

room

must

be

must

'have

sizd

Cupboard

combi

the

or

required

open

6f

of

Pos.

vents

air

High

Level

LOW

Level

The

2.

:

guidance.

internal

or

space

have

either

room

permanent

a

compartment,

(for

and

at

space

in which

permanent air

a

to the

direct

internal

or

to

direct

compartment

or

is to be

boiler

cooling

appliances

flued

flue dilution)

high and

vcw20/1 vcw25/1

VCW-sine

vcw20/1 vcw25i1 VCW-sine

supply

for air

following

air

the

permanent air

purposes and

low level'

air supply

the

outside

space

vent of

outside

installed

in the

notes

boiler

vent'

which

air supply

also

cupboard

These air

This or

air

must

least

at

The

air.

vents

in

Airfrom

internal

cmz 280

320 235

560 640

,235

minimum vent(s)

are

maximum

are

is

to

The balanced does

have a oermanent

vents

internal

or

in a

the

for

or

minimum

The

vents

air

compartment are ielated the unit.

room

space

,

{42)

(50) (36,5)

(84) (1 (36,5)

effective

is specified

rated

Appliance

vcw20/1 vcw25/1

require

not

either

must

space

etfective

required

are specified

to the

vent areas

Air

or (inr)

00)

area

below

input

heat

combi

flued

room

the

vent.

air

communicate

direct

or be

areas in the

niaximum

Airdirectfrom

cm2

140 160 120

280 320

120

permanent

of

is

and

the unit.

of

cmz

108 130

boiler,

internal

or

to outside

the

of

below

rated

outside

I

to

16 20

VCW-sine,

space

the

with

air.

permanent

cupboard

(Tab. 1)

input

heat

(inr)

(21) (25) (18,5)

(42) (50) (18,5)

air

the

to

room

or

and

of

Tab.1

Both

Note:

the

both

be air.

Effect

3.5.3 is anv

lf there oremises iir ipittag"

3.6 Detailed

circulation

5449 heatinq notes not forming should and

6

there area

inlet

of

Water

(Jor

:1

svstems)

ire

belnsulated

possible

air

same

on

an

of

tvpe

i6 from

products from

the

circulation recommendations

system

small

particular importance.

of

pbrt

freezing,

room

the

extract

of

possibility

the

are

bore

and

the

ot

internal

or

wall

same

fan

extract

outside

system

given in BS

and

342-

CP

useful help

to

particularly

communicate

must

vents

or

space

the outside

to

fitted

fan

if adequate

that

provided

is not

open

the

for

5376

bore

micro

prevent heat

following

the

Pipework

heating

where

surface

with

must

the

in

flued

water

BS

:2'

central

loss

pipes

cupboard

Where communichte

room

the

permanent air

combi

is

fan occur

must

taken.

are underfloor

Draininq oosition-s svstem water

1/2 in.

2879.

BS

internal

or

boilers

in operation.

a spiilage

be carried

through

run

sPaces.

taps

which

including

system.

nominal

or

the

with

vent(s)

could

flue

test

out

roof

must

permit

the combi

Dlaining

size

compartment

or

room

must

space

specified

as

when

occur

such

Where

detailed

as

and

be

and

necessary

any

spaces

located

draining

the

heater

should

taps

in accordance

be

vents

air

internal

and

space

have

itself

in 3.5.1.

extract

the

installations

BS 5440.:

in

actlon

ventilated

in accessible

whole

the

of

the

and

least

at

be

with

a

1

hot

Electrical supply

3.7 Wiring

The combi boiler

external

installed in accordance

be Regulations apply.

4 lnstallation

4.1 General

The combi

flat area of

vertical measure as shown

This

area does

installation and servicing.

fitted on a

be

should

material.

\-

In addition. a minimum clearance of

to the combi boiler

and any

local regulations which

is

supplied

of

is to be wall-mounted and a

boiler

wall is required which must

on template-

not include

wall

of combustible

protected

by a sheet of fireproof

with the l.E.E.

for 22O/24O V,

boiler

clearance

lf the

appliance

material,

must

the wall

400

50 Hz. Fuse rating is The

combi boiler has to the mains terminal

For wiring

(16 appliance to enable the servrceo.

Service clearance of 150 mm side

For the

for

and

is

the flue. The 2

cartons, one containing the carton containing the terminal/duct delivered with the balanced flued appliance.

mm

electricity supply

box.

instructions

in.) must

is reouired.

open

25/1

an additional clearance is required for

installation

o

o c

o6 >o-

FO.

(U

3 A.

be connected

paragraph

see

be available at the front of the

flue

combi boiler is supplied in

accessories. An additional

combi boiler to be

type appliances VCW 2011

the

vcw20/1 vcw25/1

using the internal

direct to

4.7.

(6

inches)

either

boiler, the other

assembly

is

F

,l

E-

Fig.3

All

dimensions

in mm

A 1095 mm 1161 mm

B

D

r

1014mm 1080 mm

K

weight 59 kg 60 kg

Minimum distance

)

remove expansion vessel.

130mm

125

mm with adaoter

15mm 22mm

'l00mm

Electrical

connection

107mm

mains

required to

Installation may require another distance.

7

Fluing

4.2 installation

the

For room .!-o"t"i"

iniluded

-in.t"llation

sealed

with

4.3 Connection A oeneral

coinection

The

view

is

following

installation.

The

woit< 40

gas

toi

for domestic

mm

and

distance

wall

8

of

combi

every

pipework

of

given

procedure

(to

hbating

flue

the

boiler,

nstructions

i

flue set.

5.

fig.

in

finished

the

system

water

PiPework'

(wall

set

reter-to

we

gas

for

describes

wall)

is.50

case)

No'

and

ot a

rne

806901

water

the

pipe-

of

mm and

Fig.4

All dimensions

1. Compression svstem)

z. S-ervice

3.

4. Union

5.

6.

7. Service

8.

9.

cock

Domestic

(gas)

service

Gas

water

Cold

cock

flow

Over

Pressure

hot

cock

connection

(optional

relief

10. Compression system) Connection

11.

Frame

23.

support

of appliance

union

(flow

of

water

(return

valve union

mm

in

(flow

system)

heating

connection

shut-off

with

heating

of

extra)

(return of

(lower

connection)'

heating

of

valve

system)

heating

!

;

t

,,4

I

lnstallation

4.3.1

4.3.1.1 fixing

After

template

the

holes.

fixing

type

The

wall.

of

4.3.1.2 After

the

hano

holes

the 5 fit the

holes

fixing

flued

Open

connecting

the

position

in

used

of fixing

sealed

Room

installinq

connecting

the

tempi-ate

8

with

where

aids

boiler

combi

group to

ancl

will depend

combi

terminal/duct

fixing

the

on

(5/16

group.

inches)

Use

mm

necessary.

thewall

posltlons

mark

on the

boiler

assembly,

(1

bolts

and

)

diameterto

the alternative

put

oI

type

drill

I

**!**o

rl

I ll

fl | )l

+1-

I

Domestic

4.3.2 connection

-

Flush

supply

connecting

-

the

Fit riqht

water

h5t union ln hard

(2)

should

-

bhect ness.

Thecombi

N.B.

oressure bxceeds will

10

cold

all

out

pipe

grouP.

domestic

compression

hand

pipe

(3).

area

water

be

domestic

of

this a

have to

watel

hot

and

loreign

before

to

via

boilerhas

10 bar.

be

matter

connecting

water

mains

union

left hand

the

mains supply

the

reducer'

a scale

system

water

amaximumworking

lf water

pressure reducing

to cold

fitted

the

from

the

to

pipe (2)

compression

water

the

to

the

and

to union

for sound-

pressure

valve

inlet.

I

t

{33

Gonnection of heating

Fledirtg

2. rrtn cqrtecting

Ftl

syslem flow

copper

group

lhe heating system

return

and

pipe

and connected

as

shown in fig.

and test for

system

should

9. soundness.

be in

to

the

4.3.4 Pressure relief valve pressure

The system, is included into

-

Screw pressure (To

4.4 Fitting Close service cocks

take

and Refit union nuts

(7).

rings

I

and unscrew

relief

in

relief valve into

be availableas

the appliance

off the

Close mains water

the union nutF

valve, required

the

overflow

an optional

(5),

unscrew

olive-shaped

(6)

with

and overflow

for

a sealed

connecting

(4)

the

brass'compr6ssi-on

service

(9).

group.

below

drain line.

extra.)

union nuts

plastic

plugS.

cock

the

(6)

(8)

*-A-6

flued

Open

4.4.1 from

pait

boiler

ing

unions

bolts(1)

the

8.1'1.),

in

aids

tubes

Unpack oarieis las inO the ionneciions.

connection oiession it on to

aPPliance

carton

lint

well

as

the

Insert

downwards

service

the

of

fasten

and

remove

and

arrestor

(as in 8'2'2)

plastic caps.from

as

appliance

into

cocks

screws

the

and

wltn

(10)'

side

tne comhang

compression

Fasten ig),

4.4.2 Unoack

Janels blastic

buct the t;le6copic

assemblY. Insert

downward service bolts

compression is,

(11,fig.13).

using

Balanced

(as baps

(20)

the

cocks the

of

iig.

thb

boiler

in 8.1.1

irtitn

appliance

iirio

13)

unions

attached

lued

f

carton

from

.) and the

from

2 sheet

tne

(16)

duct

with

compression

the

hang

and

case

wall

unions

using

(6,

(6)

and

(1

washers

aPPliance

packing

connections.

(1),

fig.

the

1)'

remove

and

aids

metal screws

terminal/duct

the

of

connection

the

unions

to the

on

it

14.

fig.

13) and

attached

union

wellas

as

Fit the

(22) to

threaded

Fasten

union

washers

nuts

side

flue

tubes

the

of

nuts,

nuts

Fig.

14

1 Fixing

Telescopic

16

22 Sheet

1 9,

Flue

20

Flue

2'l

bolts

duct

bend

20

duct

metal

21

screw

12

45 Gcconnection

Frt the

Cleil s.Dpty service

Connect and tighten.

a

Flue connection

4.6 Insert flue

the adapter A

split ensure simplify

gas

service cock

foreign matter from the

all

out

pipe

cock!

gas

the

into the

provided.

socket connector must be fitted

easy disconnection of the flue

removal of the main heat exchanger.

(5)

to the appliance.

before connecting to the

pipe

(open

to the

flued)

service cock

supply

draught diverter after fitting

gas

to

F--i

tl tl tl

ri

to

22.

22.aCollar otthe draught diverter

24. Adapter

25. Splitsocketconnector

4.7 Electrical Vaillant

only necessary to connect the

a

and the room thermostat. 50 Hz. electrical sgpply fused 3 A.

Warning!This appliance must After removing the terminal

the mains to the terminal the manner indicated

label

showing the correct mains connection

the terminals is in

remove before connecting. Do not

pump Full wiring diagrams for various

schemes are shown

diverter

connections

combi boilers are completelywired. lt is

the

connect the electrical supply to the

terminals

(b).

intig.21 Io 24.

pipe

. Flue

21

Draught

electrical mains

Connectto220/240v

be earthed.

box cover connect

(c)

of the appliance in

below. A cardboard terminal

box. Please

to

control

Connection

4.7.1 shown

As

is coloured

*nicn

terminal

the inO the Dluq. 6e on tne oi coloured i" rn"

"opiiin"" oi svmbol O vellow iimer

linked.

a.

b. i-

4.7.2

--

Connection

terminiri

Vaillant resistance. inJiiiteo

neiiner livinq therftostat

be

iotfurt

be icceleiating is ior

,nit "an oi Wfren bridge

4.7.3 The

ways

Settinq

Setting

tetminal

tne

to

The

ioni"ct"O

aoptiance

coioureO

qreen

otine

and

on

installbd,-terminal

is

2

Fuses Terminals Terminals

Connection thermostat

g

room

on

Ov

rooin.

followed.

the

requlated

not connected,

i"iting

bi

OriOge

a

tfrE

must

PumP

pump

(see

(as

I For-use systems.

thermostat.

room

ll

For"use svstems.

valve

o'as

ttl

seltting

Purip affected

the

of

figures

the

on

brown

marked

the

A

anO

current

the

purposes'after

fig.

runs

with

marked

wire

neutral

terminal

the

to

black

two

to the

or

plug.

(delay for for hppliance

room

of

thermostat The an

During

For

Vaillant

resiitance.

op6rated

between

room

be

control

may

suPPlied)

with

Pump

with Pump

switih

bY

the

to

and

the

on

yellow

and

teiminals

terminal

coloured

no

lf

action).

pump regulating'

Vaillant

of

clock

with

thermostat

recommended

is

4. lt room

wall

inner

air

of

the

manufacturer's

sake

the

room

a

by

to operate

by

ihe

thermostat

removed.

controlled

be

20): clock

is switched

thermostatic

is switched when

Permanently

external

cable

mains

conductor

live

the

connected

be

must

the

L on

a

L or coloured

coloured

marked

terminal

plug' The

be

must

marked

green or

thermostat

room

input

(RT) with thermostat

which

nor by

installation

combi

lf the

provisional application

and

gas

controls.

4 must

and

3

connections'

room

(no'

394)

is made

accelerating

is

the sun,

of

indications

economy

of

boiler

thermostat

room

heating

the

installation,

the terminals

wired

is

in one

room

off by

radiator

off

valve

and

to

appliance

on

red

must

blue

a

with

marked

earthwire

connected

the

on

O

an

wrth

green ano

or

be

the

to

install

to

De

must

influenced

the

in

room

the

must

and

should

with

thermostat

system

the

and

3

this

in

three

of

thermostat

clock

valve

clock

by

closes'

is

N N

E

a

4'

not

or

Fig.18

1

..'\L*=

LEf,-l

-j

@@_a

@a

t

Sz

14

i

Thcrmostatic

1,7,

TRVs and a

l$rere ilibfrirg betreen

lYhere

side of the clock is connected

teminals 3 and

no clock is used a

inserted between

pump

Setthe

VCW-Terminal

Fig.21

control to

VAILLANT Roomthermostat VBT378

radiator valves

clock

are used the

4. wire

bridge

lerminals 3 and 4.

position

ll.

0

must be

RANDALL

TimeSwitch 103

Do

not link

terminal3

N L

& 6

Mains Supply

24OV/5OHz

I

a

VCW-Terminal

VAILLANT Roomthermostat VRT378

SWITCHMASTER

O

0

300

Time

1)

2)

Switch

REMOVE

Link N

and 2

Link

L and:4

N

Mains

L

Supply

24OVlsOHz

3

15

Fig.23

LLANT

VAI Foomlhetmostat

3 78

vRT

HORSTMANN COFONET

Time Switch

link

not

Do terminals Land5!

N

t.in" SuPPIY

L

2r0v/50H2

J

125

3

o

l':-'

VAILLANT Roomthermostat VRT 378

16

O

N Mains

SUPPIY

0

L

24ovl5oHz

+

B

l I

I

b

i

E

-9-

6=O

E;E

9p5

;

a

E

o a

cl c

3

p

o

c

o o

a?

o

"9=i

E$s

a

lt^

ol

988-

x*'t

:oo o(g

F

.o

(,

CD lo

(o

I

3

o

'

o

=

;

",

1

EY

r()

AI

.st,

tt

E

o o o

c

'=

15 14

13 '12

11 10

9 I

7 6

5

70 71

73 54

5:l

Fig.26

flow

cock

switch

1 service 3 4 thermostatic

gas inlet

5

6 automatic

pilot

7

switch

I

9 oush

pilot

10

push button

1 1

thermo-magnet

12

micro

13

thermo-couple

14

pilot

15

valve

adiustment

box/FFD

button

valve

switch

burner

element

screw start stop

0t[|il[[|ll

overheat

1 6 sensor 17 main 18

19

20

21 22 main i3 24 25 26 i8

29

of

excnanger

heat

screw

venting

air expansionvesset

burner

main

governor

gas

burner double-stage venturi

differential DC expansion pump

solenoid

valve vessel

/-ffi

cut-off

..

adjustment

burner

main

pressure

21

n

23 24

25 77 26

30

2A

n

31

58

61 7A

46

1 32

device

screw

valve

control

18

-'_-43

N--.a.-:.*.

water

sedlon

inlel

water

governor.

outlel

control

resistor

hot

.

switch

*"*"'

micro-switch

58

water

:li"#3[?t!l3ll

3?

32 39

i

41

X3

$i[#s$:rrtt:"'

53 54

circutr

heating

switch

main terminal

tlo"o"*

rn"rto""'

micro-switcn

micro'switcn

o"'"""'ic

t. ll

water

59

cold

60

water

61

water

hot

63

!3il'J3-:Y':ilvarcr

3e

electronic

70

NTC

71

"1.1H,$3#3f;'ftL

1?

systembypass

78

relaY

79

19

Water

5

General

5.1 The combi

minibore It is

2871

The use avoided air

and

recommended

:1for

wherever

collecting

circulating

is

boiler

water

of

suitable

microbore

to use

carrying

horizontal

possible

the system.

in

systems.

pipe

system

use on

for

tubing

copper

PiPework.

runs

in order

lf horizontal

most

to

should

prevent

to

unavoidable

are towards

For

BS

be

runs

mide

be

-

SPECIFICATIONS CENTRAL

to

and

point.

a vent

qeneral

MATERIAL

BS 5376:2

quidance

ihe

to

HEATING

the

pipes

British AND

AND

and

should

reference

Gas

INSTALLATION

FOR

HOTWATER

BS 5449

rise upwards

should

publication

DOMESTIC

-,

:1.

B

Single

5.1.1 The

circuit. heat can fittinos

PiPe

emitters

heat

necessary

The

(radiator) must be

emitter

done

be

the return

in

The-radiator

temperature

of

basis circuit.

Two-pipe

5.1.2 radiators

The temperature

radiator.

central

Typical

following

the

to 5.5

5.2

NOTE:

and sealed

primary

The

N.B.

convenient

any

sYstem

installed

are

water

for instance

connection

shall

sizes

distribution

system

installed

are

therefore

heating

figures.

is the same

installation

are applicable

systems.

point

filling

point

on a closed

quantity

for every

ensured.

by using

of

be calculated

suction

the radiators.

on

around

parallel

may

the circuit.

on

the

and

for every

are shown

to both open

placed

be

This

the the

Fig.28

flow

in

Filling Point

at

20

Fig.29

S2Gontols Vdilt

cofiti bcilers

oleebcLft:d mains.

conhds

W$Gn

h figures 21

sfwn

lrolating valves

53

The

+dianoe

(service

dws 4-3_3.

5.'tGirculating The

cirolating

boiler. The remaining

betaken from SssYstem by-pass

A

system

bdler.

(24OV)

shall

cocks)

pump

the

diagram.

by-pass is

to 24.

ready

are

may

installed

be

as described

is included

conveying

included

for

connecting

be

connected

with isolatinq

into

the

capacity

into

the

as

unde-r

combi

can

combi

5.6 Open lf it is required

systems modification recommend isofation

the

British a: should

Min static head: Max see BS

2 3 expansion 7

vented

to

possible

it is

to

to fit

pressure

relief

(no.

valve

Standards

otl.gr requirements

be

strictly

0.15

static head:2.0

5449 clause 24.1 expansion overflow

pipe cistern

pipe

system

use the

combi

to

the

combi

the

expansion

7,tig.

valve is

and

Codes

involved

observed.

(5'water)

bar

(67'water)

bar

heater

in

heater.

(2)

normallv

The

relevani

as

also

ooen

W6

at the

well

3.1)

do so without'anv

pipe

12)

where

fitted.

of Practice

(see

800 176

1000

Fig.31

220

1200

264

14c,0

308 352 cPH

1600

L/h

21

systems

Sealed

5.7 Sealed

exDansion ouitiW Jsed

systems

cisterns,

raOiator

in order

to

topping-uP.

Pressure

5.7.1

is required

This connected'as

5.7.2 is

This

pressure

shown

Pressure

factory

the

in

do

open valve's prevent

lelief

all

on

gauge

to

fitted

Primary

require

not

vents

fittings

and

excessive

valve

sealed 4'3.4'

in

boiler

the

circuit.

leed

only

etc'

should

detrlmenlal

systems

shows

and

gooo

be

and

the

is

3

Expansion

5.7.3 expansion

litres

1 5

A ihe combi

iuit". 260

lf the vessel itor-instance iioen cin Oe

ieturn pressure relief

5.7.4 The

seoar6te on'

Authority connection connection

b6iler

with

(57.2

litres

nominal

is not

Jvstems)

instatt6d

service

Filling

svstem

lilling

neati-nb

the

Regulation

to-the

must

completed.

Reqirlation corinection, break witt domestic

ln

waier

shown Methods

appendix

must

tank

be

not

side.

principle,

mat<e-up

some

that

filling

of

A

vessel

suitable

maximum

a

galls')

lmP.

capacity

sufficient

in

of

case

additional

an

the

to

in connection

cock

valve.

make

and

be

should

point

fitted

circuit.

mains

be

Where

does

a sealed

used.

be

automatically

filled

sealed

faciliti6s,

make-up

sealed

BS 5376:2.

is incorporated

a sealed

of

for

the

water

built-in

heating

the

contents

expansion

modernization

expansion

connection

side

uP

water

with

filled

a convenientpoint

at

local

Where

allows,

removecl

local

not

system

systems

a

b,e

may

when

Water

allow

filler

heating

The

do

experience

but

may be

systems

not

necessary'

are

into

heating-

of

sys,tem.

old

of

ve-ssel

the

of

the

with

a

via

Water

temporary

The

used'

lllllng

ls

Authority

temporary

pump

with

system

the

from

require

has

given in

Fig.32

Pipework

5.7.5 All oioework

run'n'eatly

and

be securely

shall

concealed

be

supported,

possible'

where

shall

22

6 Cornmissioning

testing

6, 1

El€ctrical

r-e,'rinary

+€sflcal

:r,mpetent

r

tne INSTRUCTIONS

IiIULTIMETER.

6.2 Gas installation Tne

reter. soundness

iecommendations

t

6.3 Water

The

whole

wtrn

Dotn

are

open.

With

the

be

fiiled through Loosen

-z

oy 1

for.water until

the

PSI).

(The

system

from

a

or

La_lK.

5376

: 2,

Check

Trom

rne

oL.-t,z otnerence. gauge emtner

whole

sealed

operation oat and

ts

installation

electrical

safety

person.

of the

should

be inspected purged

and

circulation

oJ the

cotd

and

combi

boiler

and

air

the the turns.

pressure

by

system

locks

4

vent

black

Vent

soundness.

should

system

a

method

appendix

of

until

ts

atatned,

in

height

rhe point

connected_

sysiem

shall

Those

gas

installation,

of

Cp

system

hot

water.

fitted,

cteared.

points

cap

on the

all

heat On

gauge

be filled

filler pump

of filling

A.) safety

the

initial taking between

at

which

and

checks

be

carried

checks

FOR

BR|T|SH

and

in

accordance

331 :

3.

should

be flushed

Ensure

the

system

V6nt

shown

ln

automaiic

emitters

a

sealed

registers

with

given

valve.

Release

system

into

the

higtiest

to

out

are

outliired

includinq

testej

with

all valves

should

tnJOoifei

tiq.

iand'2.

air

and

check

svstem

t.s

iraiizr.S

water

either

with

a

break

in

water

pressure

account

pressur6

ensure

by

GAS

the

for

the

out

vent

fiti

BS

anv

heat

a

Fig.33

t

components detection

6.4.2

Pull matn pressure

6.4

Lighting

The

first

lighting

quatttied

oy

a

verbat

instructions

operate

the

generally.

separately

6.4,1

Gas

Test

gas

for

fluid.

Main

off the plug

Durner

test

the

combi

of the

fitteronly.

combi

boiler,

Light

the

"lnstructions

in

the

soundness

using

burner

pressure

of the

pressure

point.

boiter

appliance

He

shall

to

the

user

controls

combi

boiler

for

around

sense

of

smell

NTC-resistor

at

the

shall

be

also give

on

how

and

systemi

as

described

use,,.

boiler

and

test

main

burnei

done clear

to

qas

l6ak

the

23

Nominal

6.4.2.1 pressure

The

intetbressure:20

burner

main

2011

vcw

2511

vcw VCW-sine

The apoliance .b'ti"5i n"lJ""urv

g"d gouernor

"itne

pilot

adiustment

1

pilot gas

2

solenoid

DC

3

burner

+ main

gasgovenor

5

blocking

6

inLipti.irte

7

Flue

6.4.3 that

Check JomOustion

carryinq

i

il6' aooliances.) lii,irl"-"iihrtish

LturitLn, ii'tn"l"li

Flame

6.4.4 the

Check

donoiuoiler

"'"'ini

"tt

"iir,li

seconos.

heating

must

mbar

pressure

18

is

neating

to a[6r

filter

Pressure

Plate

test

there

from

spillage

a

r.

thppiicaote

Check

check

tvpe

lriv

tailure

operation

to

sit

regulated influt.

thb

is

the

thatihere

inPut

follows:

as

be

(8.08

in'

(cold

and

mbar

9.0 mbar

9.0

mbar

10.6 at

Therefore

of

setting

installation'

during

screw

test

Point

(near rear

point

spillage

no

draught

down

as

test

only

appearance

is

outlined

as

also

of

extract

fan

device

flame

the

of

that

ensure

to

main

the

WG)

hot):

(3.61 (3.61 (4.26

factory

it

or

.input

plate)

products,of

of

diverter

detalleo

open{lued

to

llames

ol

adequate

under

fitted'

failure

device

the

within

burner

WG)

in.

WG)

in.

wG)

in.

to is output

In

air

3'5'3

devic.e

the

not

by

t:D

In

for

will

60

Flow

6.4.5 the

Check Jontiofs

controls

6.5 Allow

woif<inq

iornon""... off iu.t". idcis. the

are

to appropriate

Water

the

temperatuie

rapidly

ind

should

Sealed

initial

Examine

for

thermostat

flow

operating

soundness

system

water

ihe system

drained

again

sistems

design

system

water

soundness.

and

satisfactorily'

settings.

reach

to

examine

and

while

be

should

still

and

filled should

then

hot'

be

pressure

automatic

all

Readjust

maximum

for

turned

be

The

cleared

adjusted

1,2bar'

of

B

water

air

of

to

instructions

User's

6.6 instructions

the

Hand l"T"niio" ii. aooriince.

oi"cauiibns ihe svstem JoLJ'not

instruct

unO

necessary

and

remain

ditions.

Leave

Note:

instructions

continued

For "iirt-viiiii"ni liLaiion"e

ippliance

a'vear

company'

important

is

It

ariangements

that

cA-sr6ereLtwith

ilt ififfiv

to ensure

24

use

for

the

in

the

the prevent

to

building

Advise

to

operative

installation

efficient

at

and

meter'

the

and should

qualified

a

bv

strongly

made

are

qualified

a

regular

safe

during

and

user

if

safe

be

of

damage

system

th-e

con-

frost

servicing

operation,

serviced

user

the

to

operation.of

servicing

re-comm.ended

a

for

-!44!!!!9

servicing

servicing'

for

the

to

Please Vo-u-r

region,

contact

nearestVaillint

Fig.35

your

senticing

oryour

office

company'

gas

local

o o

N

=

o o

7 Assembling

ieotace

:ernperature :ssembling.

the

plug

to the

Coefficient)

NTC

resistor

(Negative

before

0

=

() a

7.1 Lint arrestor

To fit the lint

arrestor hang

the lower retaining

appilance.

Side

the 2 and

two

panels

screw

pairs

7.6.

panels

side

to the

of captive

to

7.2

Push boiler with door isre^quired section

(open

flued

frame

from

upper

slotted

open from

appliance)

it into

and

clip it

the front and lower

the front

against the

onto

frames screws. the

right

side of

the

lf

the

see

Fig.

38

o

+-

=

o

25

7.3 Screen Position

unOer eJoe

the-slots

otit" ileolace

the

tne side

tne

ot

in

*itn

the

Front

7.4 the

Press

enameled

engage

bolts

Plate

hand

left

panel. Press

hand

riqht

screen

the

screws

3

thermostat

Panel

front

sbction

centre

in the

the

of

edge

side plate. Secure

as

panel

spring-bolted

the

panel

indicated

knob'

including

onto

slide

the

screen

under

align

and

the screen

fig

in

the

boiler'

supports'

plate

the

with

39'

grey

the

4

Door

7.5 door

The

hand side

the

from

door

the

with

support

26

supports

panel

The

left).

the

into

the

attached

are

the appliance

of

is fitted

door

support

upper

screw.

hinge

the

at

(door opening

follows:place

as

fix to

and

right

lower

I

-

Changing

6

-r€

-i:--.

-rc,er.

-,ar'. :E€}

7.7 Stickers Stick

-

to fio.

can also

roor

as described

and

to the

an@.

on

instructions

-

diagram

wiring

inner side

the

43.

attachment

door

be

the following:

in

lower door

the

serial test date

hand side

left

sheet

no.,

point pressure

of commissioning

of

to

fitted

after

the door as

open

support

filling

and

from the

Changethe

from the

panel

of

in

shown on

right

the

8.

$ The

-

once with INSTALLER.

8.1 To service

-

Switch

-

Turn off isolating shut-off

Servicing

should

boiler

combi

year.

A service

a

BRITISH

Turning off

GAS

combi

the

the combi

off electrical

gas

service

(4,

valves

(5,

valve

of combi

be serviced

contract

boiler

supply

tig. 44).

may be agreecl

or

Your

boiler

(1

tig.44).

,

(3,

cock

fig.

tig. 44) and

boiler

least

at CORGI

44),

boiler water

cold

e

@

@__

a-]r*Lrz

I \,{\

ta,

Removing

8.1.1 Remove

oullinq banei

jlanel

'screw

screws

door

door Oy bir

over

(c)

left. Remove

buttom then case

side

screws

pulling

of VCW-sine (A)

remove

to

fig.45.

in

shown

Draining

8.1.2 (fig.44

necessary,

When

follows.

as

-

Open

-

Drain

46).

fig.

-

D-rain screw relief

the

of

case

outer

by unscrewing

down.

and

out

pulling

outwards.

rockei

sliding

boiler

switches

right

iemoving

and

panels by unscrewing

(d)

to clear

panels

outwards

the balanced

remove

flued

the 4 screws

combustion

aPPliance

the

46)

and

appliance

the

46)

(18, fig.

vent

air

appliance domestic

(C, vdlve water

through

heat

46)

fig.

(D,

fig.

section.

exchanger

as

46) at

(fig.44)

Remove

gauge

(b)

hinge

thermostat

loosening

and

panel

hand

top and

clips

internal

and off'

combi

and washers

may

.

draln

as

the

case

be drained

nlpple

via drain

pressure

lower

chamber

well

and

upper

knob'

to the

and

In the

boiler

as

(tr,

part

{eir

'ry

t

Cleaning

8.2 Cleaning

8.2.1

8.2.1.1

Remove

nut

union

lose

to

couple ten6ion

28

of

Balanced

the burner

(E),

the

pilot

the

pulling

by

from

lead

burner

llued

unscrewing

by

pilot

airfilter

inlector.

down

ignition

the

lint arrestor

and

appliances

(F),

Remove

taking

and

electrode.

the retaining

take care

the

the high

off

not

thermo

L

l,lrcrer the retaining trcs. il

CEE'.

Cilean bumers,

certbly

with

screws

a light

Fbsenble in reverse

bumer

gasket

if necessary.

m-r

(T)

and

injectors

brush

remove

nozzles

or a vacuum

order, replacing

and

the

Fig.48

82.1.2 Open Remove bumers

a screwdriver. Remove

pulling

by

probe

that pilot

assembly.

Remove

Clean burners vacuum replacing main

llued

appliance

by levering

downwards

disengaged

by unscrewing

burner bar

by unscrewing

injectors

and

cleaner. Reassemble

gasket

burner

off burner

thermo-couple probe

pilot

from

circlip.

screw

with

in reverse

if necessary.

assembly

Remove

(F).

nut

a light

brush or

bar with

(E).

order,

so

29

Cleaning

8.2.2 (open

flued

lint arrestor

part

the

which

Remove the appliance.

with the

Clean

Reassemble

8.3 Cleaning

8.3.1 Remove

screws

far as

as

Remove

device exchanger. exchanger

above Clean

with hot

necessary aqent. st-raighten

8.3.2 Remove

Slacken Slacken

diverter possible.

but-off

the heat

of

heat exchanger

the

nuts clean with

necessary,

aoent.

st"raighten

in reverse order.

Balanced

burner

holding

possible.

sensor

pocket

from

Undo

unions

Remove

them.

heating

waier,

descale

not bend

Do

carefully

flued aPPliance

Open

burner

split

the

slide

and

Remove

device

exchanger.

(H)

above

heating

water, detergent

hot

descale

not bend

Do

caref

lint arrestor

of

aPPliances)

pulling

by

near the connections

is

vacuum cleaner.

light brush

main

of

flued aPPliances

as under

the

body

collar.

2 screws

from

them.

body

ully

or a

heat exchanger

.1 . Slacken

8.2.1

flue hood

(3)

on

union

and

detergents

with screwdriver.

assembly

draught

sensor

the

unions and

with screwdriver.

and slide

of overheat

hand side of

left

nuts

locking

slacken

heat exchanger.

especially

with

the

Remove

with

and

propriety

fins.

as

holding

diverter

(3)

of

pocket

on

union

Undo

slacking

and

heat exchanger'

especially

and

proprietary

fins, if

the

downward

of the

the

hood up

cut-off

(G)

fins carefully

lf necessary,

under

left hand side

heat heat

on

(H)

nuts

brush.

descaling

82.1

the draught

far as

up as

the overheat

(G)

nuts

locking

fins

carefully

brush.

descaling

necessary

2

lf

.2.

L

on

lf

30

-:_Tove

-a-c

:,:.e

-

=;lp9emble

A:shers

-

:

8.4

111:l]r_etcessarytodescatethedomestic-heat

excnanger

.1"_.-:y'q

-nscrewing

:o

the

=i:"^

.1?I--qy9

-o_

rarn

:11e_:

arerwards

3ea:semble /yashers.

the

connection

and

o-ring,

-gcessary.

.are

rlue

J

duct

Descaling

remove

saus"

the

connections.

p^y

.unscrewing

the

lng_

?y

3

screws

ptoryetary

with

in

venturi

tube

of

the

clean

bore

reverse

..in

fitted

in

engaged

of

2

clean

heat

in

domestic

the

"nd

t-n"',i:",ru

tubing

nuts.

reriove

tne

u.nion

nuts

(

l).

Descale

descating

water.

reverse

situated

heating

and-repla6"

oroer,

"".n",ig"i'r;;;X

spigot

in

heat

exchanger

tl

For

6et-tei;;;";i

the

b;;;;e;;fi;;

S

retatning

(K)

b,jr".ti"

agents

oroer

using

in

the

riqht_

O"Ov.b'nZci

;_*;;

ensurino

flr;

6rrn*;;;i

i:Ji:?"T;

;;;ily

"io-ir,"'"2

rlt"?

anO

rinl-e

new

:

8.5

Cleaning

I?_-l"Toy.q.

'nrernat.. connections

i:^,,!:tl

:ne

tower

(N)

":tess

retaining

of

the

and

water

the

loosen

to

the

frame.

section

the

connections

unscrew

external-

screw

(M)";"i;;

(L).

unscrew

the

water

the

Open

(O)

replace,

or

water

anO

tpj necessary.

Reassemble washers.

stuffing

Where

water

to

too

box.

section.

necessary'

if

governor

reverse

in

gland needs

section,

the

Clean

Check

(61),

order

incorporating

replacing

filter

water

diaphragm

replace,

new

using

new

fit

new stuffing

if

Maintenance

8.6 Mark and

unscrew

Ooen dihohraom eaiv

the

differential

ruininq

casebi

In

box.

recommendable

it is

Lubricate

disc.

disconnect

and

Mark

by blowing

clean

Reassemble

of differential

disconnect

retaining

three

valve

replace,

and

diaphragm

of

replacement

to

with

the

through.

in reverse

the two

screws

and

necessary.

if

of

replace

suitable

control

two

order.

valve

unions

(Q).

clean.

disc

stuffing

the

also

grease.

and

Check

in stuffing

box'

diaphragm

lines and

.

Jt-

32

Fig.58

s

Eryansion

E-7

system

lnec*

should

*nir*r srstem

build-in

of

:'al

pump, if necessary.

ar

Final

8.8 Final

8.8.1

all drain

Close service svstem a-ccording

qas

and ;ticker flame

Check

adluster

rate seoarate larqe, seiarate Replace

Check Check

reassemble

7.

under

Final test

8.8.2

Check

vessel

onlY)

internal

pressure of expansion

be 0,7

appliance

of

pressure gauge

tests

heating

test

screws to

cocks

ensure

to 6.3. Switch

the appliance

start

inner side

the

at

device

failure

pilot

the

flame

(7)

flames.

flame,

loose

flames develop,

jet

pilot

appliance

the

all controls

outer

electrical

-

earth polarity

resistance

INSTRUCTIONS

according GAS

to

MULTIMETER.

(sealed

to 0,9

is without

i{:.--

ti f5f

system

nipples and

and

the

appliance.

pressure

refill the

on electricity,

as outlined

the f ront door.

of

for correct

and adjust

that there

so

flame

lf the

increase

as shown

if necessary.

for soundness.

for correct

casing

system

continuity

to earth

heating

if heating

bar'

pressure

Refill

at 0).

open

lf

a sealed

1.2 bar

is

functioning.

the

with

are

profile

gas

rate until

fig. 60a'

in

functioning'

appliance

of

FOR BBITISH

vessel

(black

with

the

turn on

the

on Check

pilot

three

is

one

as

I

l_

(

i

I

o

tf

o

3

O

3

Change

8.9 Disconnect

jet

pilot

and

ordbr.

of

In case pilot

assembly

Changb

bcrew.

order.

reverse

connections

Check

of

iet

Pilot pilot

tube

the

and

washer

an open-flued

unscrewing

by

pilot

the

for

gas

pilot'

the

from

reassemble

appliance

jet

remove

the

reassemble

and

soundness.

Change

reverse

in

retaining

the

in

Change

8.10 Disconnect

thermocouple Insert

support. thermolead

plate retaining

8.'l1 (VCW-sine

Pull off retaining

and Reassemble spark is 3 screw.

8.12

Disconnect NTC

the

new

the

(ln

into the

a special

by

nut.

Change

only)

the

screw

replace

in

gap

from

taking

m;,

Change coefficient)

the

probe. Reassemble

thermocouple

of

retaining

out of

thermocouple

case

sPark

of high

(S),

with

reverse the care

NTC

of

AMP

nut

the thermocouple

VCW-sine

of

bottom

washer).

rubber

electrode

voltage

remove

the order,

electrode

to overtighten

not

(negative temperature

Plobe

plug

in

(R)

and

fully into

the chamber

of

Connect

remove

lead,

the spark

new

ensuring

the flame

to

unscrew

and

reverse

pull

the

support.

the the

seal

the

electrode

electrode.

the

that

shield

f ixing

the

order'

,,n[;5-o

j

Change

8.13 the appliance

Drain

Unscrew Reassemble automatic

Open

vent

the automatic air

locking

the

-2

1

by

34

of automatic

as under

reverse

in

vent

turns.

in bY

cap

hand

(LC)

vent

air

and

8'1

vent

air

screwing

order,

onlY.

the automatic

of

8.1.2.

by

hand.

the

air

\,

Change

|llf

Electrical

t-1f.1

the appliance

botde Pr.fl

Egu6

8.14.1.1 Sorinq

(S4

the

off

(S8),

or

AMP

plug (S1)

the

(S2)

Ghange mirco

the

plugs.

Reassemble

the actuating

Adjust

8.14.2.'1.

switch

flow

of

isolation

the

from

top and bottom

by shifting

flow switch

of

switches

protective

take otf

reverse order.

in

cover

micro switch

lever as

parts

or

el6ctrical

the retaining

to the side.

(SG).

Unscrew

and

outlined

mains.

remove

under

Removal ol

8.14.2

the appliance

Drain Remove

(S4).

Pult

resistor.

complete

as

the 4 unions

AMP tag

off the

flow

switch

under 8.1 and

(S3)

the 2 screws

and

(S5)

of

8.1.2. the NTC

8.14.2.1 Remove

Unscrew micro switch nut screws securing box, seals, seals. lever assembly follows: slowly circuit and

Change

complete retaining

(S10),

remove

assembly.

remove lever assembly,

both

ensuring

Reassemble

Turn down

micro switch

until

make one

of flow switch

flow switch

(S9)

screw

Unscrew

top cover,

rubber seals and

washer

in reverse order

the cold

of

the adjustment

more complete

unscrew stuffing

is fitted between

closes the

stuffing box

as in 8.14.2.

and take off

adiustment

remove

fit new

and adiust

flow

switch

(S10)

nut

red to brown

turn down.

the

3

the

as

8.14.2.2 Unscrew

remove reverse order,

8.14.2.3 Remove housing as Bemove seals

ones. grease.

8.14.3 Reassemble

wasners.

Check

according GAS

Note:

Change of

the 3 retaining screws

the housing

using

Changing

R1

and

not

Do

use

Reassembling

in reverse order, using

-

earth continuity

-

PolaritY

-

resistance to earth

to INSTRUCTIONS

MULTIMETER.

position

of notches on

thermostatic element

(S12).

new washers.

internal seals

in 8.1 4.2.2.

R2 and replace with

jointing

any

(S11)

Reassemble in

compound or

FOR BRITISH

plug

as shown.

and

new

\"

.to

the

piezo

ot

only)

high voltage

unit

by

in

reverse

in the

unit.

Af 5 Change

(VCW-sine

Elisconnecl the

i.d bolt. Removethe

remove Reassemble

krcding dimple

dd in the

igniter

lead

retaining

springing

onier,

bracket

(pl)

screw

the

ensuring

aligns

from

the

(p2)

and

bracket.

that

wiih

the

fr=

b4

8.16 Change lsolate

llolg.coloy.r

(Dl)

from

dugs Loosen

Beassemble Check

a€cording GAS MULTIMETER.

8.17 Change lsolate

Note the (Ml).

Unscrew

Reassemble Check

qcggrding

of DC

the

appliance

code

and

the

micro

(D2)

the

-

earth

-

polarity

-

resistance

to INSTRUCTIONS

the

appliance

colour

-

earth

-

polarity

-

resistance

to

switch

from

the

2

retaining

in

reverse

continuity

of DC

solenoid

code

and

the

2 retaining

in

reverse

continuity

TNSTRUCTTONS

GAS MULTIMETER.

solenoid

from

the

puil

as

DC

ordel.

to

earth

from

the

pull

order.

to

earth

electrical

off

the

AMp

weil

as

solenoid

screws (Dg).

FOR

BR|T|SH

micro

switch

electrical

off the

AMp

screws

-

FoR

BRtTtsH

mains.

ptugs

the'Alrip

socket.

mains.

oluoi iMi;.

ri

l

i

Ghange ot

8.18

8.18.1 Change

Drain the appliance

the appliance

lsolate

the terminal

Open colour code connection

Unscrew Mark and disconnect automatic (P2).

Loosen

unscrew

nut

union

main heat exchanger.

the

pump

of complete

as under 8.'l

from the electrical

box of the

wiring and disconnect

of

cable.

the automatic air

the 2

valve by unscrewing

the 2

the bracket

(P5)

fixing

the right hand connection

at

vent

pump

screw

pump

and 8.1.2.

pump.

(Pl

control

the

unions

(P4)

mains.

Note the

pump

by hand.

)

lines of the

tubing nuts

(P3)

and

and the

to

8.18.1.1 Open

Take

otf connection

together with the

Reassemble in reverse order, using new

washer at the right heat exchanger.

Screw Check - earth continuity

according GAS MULTIMETER.

8.18.1.2 Unscrew

pump

off the reverse order, using hand connection

Screw Check

according

MULTIMETER.

GAS

flued boiler

to main heat exchanger

pump

as shown on fig. 75.

hand

connection

in the automatic air vent by hand

-

polarity

-

resistance to earth

to INSTRUCTIONS

Balanced flued boiler

pump

the upper

shown in

as

in the automatic air

-

earth continuity

-

PolaritY

-

resistance to earth to INSTRUCTIONS

union

fig. 76. Reassemble in

new washer at the right

to the main heat exchanger.

vent by hand

to

the

FOR

BRITISH

(P3)

and spring

FOR BRITISH

maln

only.

5.

38

8-18.2

Change

Drain

the

lsolatethe t-lpen

ggroyr p:llp,_

L"l:ll,lS

$":F:Ti_{{t,yiHl3lfl

n^eassemble oamage

Check

appliance

the

terminal

code

connecrion

screws

the packing

-

earlh

-

polarity

_

resistance

..

pump

of

the

(p6)

in

reverse

continuitv

as

from

box

wirins

cabie.

ring.

to

appliance

head

under

the

of

the prmp.

ano'oisc[nn6ci

ano

p.urr

lHrJvJisy*siEb

order.

earth

3iT'fl0flr,'#PTRUcT|oNS

0

8.19

Change

of

gas

section

onty

g.1.2.

8.1

and

electrical

un.,jr"*

mains.

fVoie

.jr,L.',i

it-e

iii!

otr p-ump.ijE"o]

Ta-ke;;;not

FoR

to

BRrflsH

$H:3}lFift?:dif"tj3,.iil?i,i!:ffi

d iscorin

ecti

i6fi"'o

8.19.1

by

Batanced

i""Jl:;"J:TiH"","#J:"{t?il

8.19-2

Open

*ruy: l"_r3ll'.19

lAli'9y;^l"move

(\rz+r,

fiffi3,l",3"assemble

Check

8.20

\|

8.20.1

l-l:lgy"

unscrew

3.'-T ?r."

I";l???rTr

8.20.2 ,T:fy:

y_1s_9r9*,

.l?^1.j9r91"

wasners, Check

the

screw

reptace

connections

Change

Balanced

gas

the

i;

Open

the,

tle

.

if

necessarv.

connections

ns

tn

6..i

il

ioii'

toosenins

flued pitot

valve

tne

flued

appliance

suppon.by

(G3)'and

ihe

seating,

in

for

gas

of

governor

flued

appliance

section

as

4

retaininc

;"";

###1,3ffi

check

c6nne"ii"""'iJi,'i!t

flued

appfiance

main

burner

retaining

for

'orOer,

gas

in

reverse

i,fi

3i

:fi

:.{li"J

)

e

ieiainiis;;"";

pirot

assembrv

unscrewinq

ihe

,;i;.'fi;;;

a

reiainiii'

springi

rev"'i"

oio"i

sounctness.

in

8.19

and

_($3ln

as

uncter

8.2.1.2.

screws

soundness.

-

using

","

JJ

the

#;;:

;t".

;;

,lsin'd

8.19.1.

*3

?d;;:

.iJ#

ffilr

8.21 Change of Remove

disconnecting pilot gas

Reassemble

sealing compound sparingly. Check connections

pilot gas

pilot gas filter from the

line from the

the union

in reverse order, using suitable

for

filter

(G6).

nut

gas

section.

gas

soundness.

pilot gas

Unscrew

filter by

the

8.22 Change Disconnect the differential valve as under

Control lines remain connected. Unscrew the stuffing oin. Reasemble wasner.

Check connections

8.23 Change of switch lsolate

Mark

remove

and

Pull the thermocouple

assembly (82)

from the switch

Remove the 2 retaining screws

the switch box.

out wiring and switches.

Reassemble in reverse order. Check - earth continuity

according GAS MULTIMETER.

Check connections for 40

of automatic

(G7),

box

the appliance from

pilot

the

and unscrew

-

taking care not to bend the

in reverse

lines,

lines.

oilot

Note

pull

the AMP

polarity

resistance to

to INSTRUCTIONS FOR BRITISH

valve

stuffing box

order. usino

gas

for

soundness.

box

the electrical

disconnect

box.

gas

the tubing nuts

out of the the retaining union

the colour codes

earth

(Bl)

plugs

from the micro

soundness.

pilot

and

8.6.

new

mains.

burner

nut

pull

the

of

v

L

Change

8.24

ffi:t'ru1"1

'm#,lx;l*:w',?::#3

Reassemble Check

a"ft'$it'''-+?JU"JF'"-

6nJ"n

{,

8.25 ""t""" llm;

button

Reassemble

Check

of

i:Hl""ls

:g:ti

and

order'

reverse

in

-

*nn""'ions

Change

continuity

earth

PSlflillset:f,S,l,

soundness'

gas

for

Push

asoutlined

box

and

(ffi)

order'

buttons

FFD

of

t*itch

""

r.ing

io"r.ing

tront'

the

to

reverse

in

-

earth.continuity

-

polarlry

rePrace

,o"

pulloutthe

stuffing

valve

FFD

b'ln-s+4"t3;'gKs

""".rdi[

vuirtuEren'

6ns

6n""n

"onn""tions

for

gas

soundness'

box

""0

3?

3

bY

BR,''H

under

BRrrrsH

FoR

a

8'23'

push

Fig.83

"A

B3

rtb

b

84

Fig.

valve

ol

tn.

Pilot

ofuq

new

a

(84) and

washer'

gas

for

spring

p9l! gut

soundness'

(85)

Change

8'26

Unscrew

t

;:flJfl:iin[i'f,lst;'igslas':n?"1"J'::

uting

6io"t'

coniections

Checx

-€f F

l.

Ynllli

8.27 Change of thermo-magnet Remove the Remove

the 2 retaining washer out thermo-magnet assemble in reverse

Check - earth

according to INSTRUCTIONS GAS MULTIMETER.

Check connections for

8.28 lsolate the appliance

Open the main terminal

retaining

retaining Lift

up the switch control box board, off the multiple Reassemble the replacing

washers

switch box as

micro-switch assembly

(B9),

-

To

open the

printed

diagonally to the

screws

unscrew retaining

order.

continuity

Polarity

resistance

screw

screws

cover complete

the

to earth

control box

from the

(C1).Remove

(C2).

box and

circuit and terminal

plugs

in

box

screws,

from

outlined under

(88).

(B1

1) carefully.

gas

soundness.

electrical mains.

box

by removing

pull

with the

the

reverse

position

screws.

8.23.

by unscrewing

Skaighten

nut

FOR BRITISH

out slowly the

printed

order. When

the 2

tap

(B10), pull

Re-

the

four

switch

board. Pull

circuit.

star

rig.

e6

3

<88

<G>

.-

8.29 Change of Take

off

Disconnect

8.28.

terminals.

remove the

and the crontrol box cover.

Reassemble in reverse

Check - earth continuity

-

according to INSTRUCTIONS FOR

MULTIMETER,

GAS

main

swilch board

the

switch board as

Unscrew the 2 retaining

the mains

p.c.b.

with the main

polarity resistance to

outlined under

cable from the

order.

earth

screws

switch from

42

(C3)

BRITISH

Fig.

BB

,z-4.

r( t-

"v4-

b

8.30 Open

box as (C5)

Pulloff Reassemble Check

according GAS

o

micro-switches

Change section

of

as in 8.28

box

control

and

AMP

MULTIMETER.

Remove

in 8.23.

take off

-

the (C4).

plugs

in reverse order.

earth continuity PolaritY

resistance

to INSTRUCTIONS

of water

remove switch

and

the adjustment

microswitch assembly.

lo earth

FOR

screw

BRITISH

overheat

8.31 Change Open

switch Pull off

remove

(3,

fig. 52)

Unsciew

grommet from box

Reassemble Check

according GAS

Check

Change

8.32 Open

Uirscrew

L

rt

)

hand side of

key-hole right.

Reassemble p.c.b. peg.

Check

according GAS

of

the control

box

the

-

MULTIMETER.

connections

the

Pull

is located

-

MULTIMETER.

box as

in 8.23.

as

plugs

2

saddle

out of

the 2 retaining

in reverse order.

continuity

earth

Polarity resistance

INSTRUCTIONS

to

of electronic

control

the retaining

the control

pull p.c.b.

slot,

multiplug and

off

in reverse

on continuity

earth polarity

resistance

INSTRUCTIONS

to

cut-off device

in 8.28 and

(CG)

and the earth

(C7),

clip

main heat exchanger.

the

screws

remove cut-off

and

to earth

gas

for

outlined

box as

screw

box.

forward

order

the left

to earth

remove

pull

the sensor

(C8),

FOR BRITISH

soundness.

P'c.b'

under 8.28.

(C9)

on

P.c.b.

and

lead.

white

and ensure

hand side of

FOR

the

lead,

release

device.

left

the

is held on

to the

the

plastic

BRITISH

8.33 Ghange of

8.33.1 Domestic water Disconnect

bracket securing screw and remove

vessel

complete with bracket.

from

bracket. Reassemble with new

water

expansion vessel in reverse

Heating

8.33.2 appliances

Disconnect the flue screws and frame. Lift rear

rest it

and screws securing draught diverter together with upper retaining draught the 2 retaining (W3), off.

that the expansion vessel the 2

diverter

move the

Reassemble

supports. Use

expansion

the tubing nut

system open flued

nuts,

securing the upper

frame

of

on top of draught

retaining

screws. Undo the union nut

expansion vessel

in reverse

new

vessel

side

(W1), Unscrew vessel

at split collar. Remove

clear

of side frames

diverter. Remove

and remove

frame. Remove

frame

by removing

up and take it

order, taking

is correctly fixed

washer, if necessary.

unscrew

expansion

domestic

order.

2

retaining

\_)

care

into

Heating

8.33.3 appliance

lsolate electrical mains cable. Close off water and drain

Disconnect flow and return

compression

Disconnect

joint

on

hot

and cold connections on

Slacken

connections. Remove nuts from fig. 14)

from

boiler and remove expansion vessel. reverse vessel is correctly fixed to

44

system balanced flued

and remove mains

gas

the

appliance as outlined in

joints

gas

top

of

locking

terminal/duct

on

wall. Disconnect

order, taking care that the

and

on

connection

cock. Disconnect

nuts on flow

:

service

connections

top

of service

at compression

diaphragm

assembly Rerirove

sleeve nut

Reassemble in

the 2 supports.

cocks

8.1.2. at

cock.

domestic

body.

and return

(1

bolts

expansion

in

(W3)

thermometer

Change

8.34 the

Pull sensor thermometer

Reassemble

t

)

8.35 Disconnect

line and Reassemble

ol

temperature

tube.

and

in

Change

the

remove

Press

pull

reverse

manometer

of

tubing

the

reverse

in

sensor

the

it out

order.

nut

fixing

order.

(U3)

tongues

2

the

to

(U1)

(U2).

nut

of

out

into

front side'

the control

ot

the the

ffi\

v

A

b

8.36 Close

^ drain

t

Unscrew valve. the necessary.

Reassemble

wasners.

Change

flow

off

as

boiler

the

Unscrew

Renew

valve.

Do

ol system

return

and

3 screws

the

diaphragm

move

not

reverse

in

outlined 2 union

in

bYPass

service

8.1.2' (V)

nuts

holding

spring

order,

cocks

remove

and

top

the

spring

or

adjusting

using

new

w

and

ol

as

nut'

S

Fault Finding

9

9.1 Sheet

1: Check of Flame Failure Device

gas

rs

pressure

available?

Thermocouple

and

green

Push

light

and

De-aerate Pilot Pipe

by unscrewing

Pilot Adlustmdnt

Screw.

button

Pilot.

Gas

Pilot

Can

ls Pilot

Pipe

Gas

de-aerated?

be

b

lit?

46

Check

or clean, if

necessary, Pilot

Filter

and Pilot

Check Pilot flame

size.

Check Thermo'

Tip isclean.

in flame.

Dositioned

Recitify any fault.

Gas

Jet.

correct

Check

Releas€:green

after about

10 seconds.

button

DaesPitot

Flame re-main

z

Adiustment

ot Pilot Flame and

Themocouple

\

Gheck

Vohage

(Open

Thermocouple

(min.

15 mV

circuit).

Voltage

satisfactory?

DC).

i

9.2 Sheet

2:

IMPORTANT: struction

book are the completion of electrical

connections then

Electricity

Check

preliminary

The

first

the service/fault

Earth - must be repeated.

Preliminary Electlical

System Checks

to Instructions

according

for British Gas

Multimeter.

Supply

Electrical System Checks as contained

electrical checks

finding

the

task

checks - A.

Push

lo

be canied

which has required the

Earth

Main Switch

posilion

into

out during a fault finding

Continuity,

l.

in the B.G.C. multimeter in-

procedure.

breaking

and remakirtg of

C. Polarity and D. Resistance

On

to

48

Replace faulty Neon

and refil Main

Switch Cover.

Replace farlty P.C.B.

with Main

Switch.

ReI. to note 1.

Cheek Operaling ol Heating System Check Operation ot Domestic Check switch lor Domestic Hot Water

Hot

Water System

(Sheet

(She6t

3) (Sheel

6)

5)

1 : Detach the Jollowing

Note

-

unscrew the cover of the

-

unscrew upper press

-

unscret/v

-

unscrew

-

pull

-

remove beside

-

install

parts

part

it a little bit upwards

knob front

multicontactplugs Aand

off

printed

the

new

ot control

of boiler

panel

ot control box

circuit by loosening

group

switch

circuit

orinted

control box:

oithe

terminal box

box

thermostat

(2

screws)

with switch

B

the two screws

and

group

49

9.3. Sheet (Do

not use

3: Check

domestic

Operation

Water,

hot

Heating System

of

for domestic

switch

water remains in Position

hot

Zl)

Can Pilot be Iit?

Switch

light?

.

give

Heating

Push

/

into

position

Switch

l.

'

240

of Overheat-

Cut-Off-Device

@on

ls voltage

V AC trom

ls Overheal

CufOfi

Device

P.CB

\

tat'f

50

Overheat

€*t

:,t-Otf

eef.

lo note 2.

contacts

-:Eck Overheat

d

Device.

:loff

a€i.

note

to

Check

Multiplugs

clean, tight

ile

:

mrrectly

ild

:r:siti.cned.

note

Device.

3.

that

arid

@

Ref.

4.

voltage

ls 2ZIO VAC

trom teminal

Are external

Thermostats

tested?

Fleplacefaulty

Thermostat.

note 5.

Ret. to

Check external

Thermostals accorclino

to lnstructions tor

British Gas

Multimeter.

the tollowing

Main

Does

light?

Burner

Go to sheet 4

'

Flepeat checks:

Earth Continuity.

A.

C. Polarily. D. Besistance to Earth

to Instructions

according

for British Gas

Multimeter.

Note 2: For

terminal For

Note 3:

device cut-otl device

For

Nole 4:

plugs iugS

To

Note 5:

run boiler

re.s€tting,

check, disconnecf

press

box. purpose,

this

isiitt(i

this

A and B and check

and

open

right hand

on

are tight.

purpose,

open

reset multicontact

in heating

rubber

the black

the control

side ofthe control

the control box as

that not contact

plugs

again.

contrclsystemlrom

mode.

butlon on right

box as describ€d

box- Checkitthe

described

lugs are bent.

terminals 3 and

hand side of control

1. The overheat

in Note

in Note 1 Pull off

plugs

flat

It necessary,

4, and replace

box behind

ofthe overheat

the multicontact readiust contact

with wire

the

cut-off

loopto

51

9.4 Sheet

4:

Check

Electronic

and Hydraulic System

lsvoltage

/ 5tol5VDCatDC

\

Check that Multiplug

connections

Replace 0.25 Amp.

are clean,

tight

and correctly

positioned.

Pull otf connection

probe.

of NTC

Ref. to note

z tol5VDCat

Solenoid? Ref. to

Re{it connection

to NTC

ls voltage

Replace

probe.

NTC

fuse.

7.

'

faulty

probe.

A

ls Multiplug A

tested?

probe

ls NTC

tested?

ls Micro

on

Switch

FFD tested?

Check black connections

on FFD Micro Switch

clean, tight

oositioned

15 V DC from

connection on DC solenoid to black FFD connections. Reolace

Micro Switch if faulty Ret.

Electronic P.C.B.

correctly

and

tor 5 to

brown

to note 8.

Has fuse

on

Electronic

P.C.B.

Replace taulty

Ref. to note

9.

Nole 6:The D.C.-voltage of 5-15 V is

7:

Note

Check that wire is

connected to Terminal

l, ll

lll.

or

ReL to note 1

Replace faulty

with

Ref. to note 1.

grey

Check

on FFD Micro

lor 24OV AC from

Terminal

connections. Replace

Micro

controlled at of the solenoid When the indicator left, reversed. On ignition ot the bumer must be a D"C.-voltage The voltaqe decroases according temperature until the electronic (at tums oft (dead) extinguishes.

Thls test shows whether the NTc-sensor has an inner shorl circuit For this sensor appliance is cool temperature lf the electronic is satisfactory, the appliance must operate.

the

the measuring

approx.

the solenoid

and

(resistance

purpose, pull

plug

less

0

P.C.B.

Main Switch.

connections

Switch

5 to

Switch if faulty.

terminals

supply

vatue. Attention!

tums.to the

lines must be

ot 15 V.

io the

V D.C.-voltage)

5. the burner

down at zero).

the NTC-

when the

off

lhan 50'C).

there

flow

valve

(Jlow

52

the following

Repeat

cnecKS:

Maan

Does

Pump run?

Pump

Are

Setting

Terminals

tested?

V AC

240

lrom termrnal

5tol.

connectlons

FFD

on tested?

pump

Check

British

.!

)

Note

accordrng

to lnstructions

Multimeters,

Gas

Procedure

Attention!

this

For

8:

1.

Note electric

switch

micro AfteMards

Before

tuse of

wire Attach box.

this

For

9:

f .

f.fote electronic-printed unscrewind hand siddof iircuit plug

as

the electronic-printed

Install

tor

9.

the

Pull otf

the

cause

function

out of

is only

appliance

device.

off

purpose,

open

the

Unscrew

and

casing

tight.

are

pilot gas

install

re-assembling

eleitronic.

the

plugs

A and

purpose,

open

the

Pull'off

towards

well as

circuit

cross-recessed

the

the control

front and

the

white

the

for

NTC-plug

temperalure

normal

position. In this

in that

protected by the

the control

pilot gas

the black

it

check

tubes

the control

lf necessary.

B

and

again

control

multicontact

can

box.

pull

cable.

circuit

Burner

Replace

Move

ON-OFF-ON.

Valve

OUT-lN-OUT.

'1

2. Check at differential

replace,

and

time only

a short

overheatcut-

as described

box

of

tubes

cables

again

check

box. re-assemble

as described

box

plugs

A and removed

be

head screw

out

Pull

the

off

in reverse

Does

light?

Difterentral

Valve

tested?

faultY

DC Solenoid.

Switch

Heating

Diaphragm

Difterential

on

move

has to

Venturi

.

Clean

Diaphragm

valve

jf

necessary.

note

Ref. to

be-

is

control

the

case

in

the thermo-

the

oJ

fine-

the

it'

replace

control

in

B The

.by left

the

on

printed

the

multicontact

order'

If not,

1 1 .

1 O:

Note

Note11:

A. Earth Continuity.

C. D. Resistance according for British Gas Multimeter.

Attention:

cable can

The black

be checked

It must

connected

movement

lf the

optically.

checked

be removbd

the two

unscrew

perfect

Under pushed

back by however, difierential

Special

checked.

venturi O-ring

the

that

Polarity.

to Instructtons

llnes

External

l,

terminals

be

enough

tightlY

of

the

by unscrewing

connection

function

hand,

possible,

connectionstubes

iwitch,

attention

Earth

to

not be

must

(short

lll

ll and

whether

ditferential

the 3

tubes!

diaphragm

the

pump

when

venturi

must be

nol damaged.

to

the

connected

the diaphragm

pressure

the

ist

connected

circuit!)

l,

terminal

cable

black

cannot

switch

screws

cannot

lf

oprates.

tube'

Pressure

pump,

or

given to the

to

ll

or

must

Do not

lhis is,

must

RE

the

I ll

be

tact

'

is

be

t"-

9.5 Sheet 5: Gheck Switch for Domestic (Heating

Switch in

Can

position

Pilot

be lit?

"O"

not

do

use domestic hot Water)

Hot Water

-Does

Pilot

lamp

in Main

Switch

light?

1

Go

to

sheet 2

give

Set Switch for

Domestic

Hot Water

position

to

-

I

(Ret.

Device

and check

n if no voltaqe from

lermin;l 5 to 4.

to note 2)

connections

240 V

54

Check Micro

by

drawing hot

Micro

Switch M1 has

be actuated

Switch Lever. piston

rising! Micro

no voltage

from terminal

Bel.

Switch

water.

(closed)

Observ6 Adjust Switch

240 V AC

4

to 5

to note 12

M1

bv

or M 1

to

Repeat checks:

-

i

ls

240VAClrom

ls

Switch

llow

check connstions

tight and

voltage

Overheat Cut-O'tf

Device

M1

tested?

switch

Multiplug

that

ile clean,

corectly

oositioned.

-

on

A

Does

Bumer

to sheet

Go

Main

light?

NO

4

A. C. D. Resistance according lor Multimeter.

Earth

Polarity.

British

i

Continuity

to

lnstructions

to

Gas

Earth

tollowing

the

Note

During

(close).

Ml

micro

lfthe

this

For main switch).

LgftT#';lT'lJ$s'#"HlFr'IH!."*

)li,j"i not

tigure

See

13:

Note

domestic

switch

Durpose,

]lghten

tn" casing

iouin

for

99

hot

is

open

micro

"summei'

tunction

The

| 2:

controlled

only

is

t"t"iiiii'JtioiiinJi6itlct

warm

of

switch

by

water

tne'iwititr'roit

oi

micro

the

Ml'

not operated

the

tnJiiri

micro

by.the

iug

the contact

lug'

(apglign-ce^9.t1!ot

tap

(top

switch'

switch

operate

must

adiustment

an

flow

ol

oDeration

sivitch)

micro

the

is necessary'

-

switch

means

bv

switch

otf

of

a

switch'

flow

the

ol

M1

frg:::Jlli:"":HL"Iill

55

9.6 Sheet 6: Check Operation (Heating

switch

position

in

0

switch

of Domestic

for

domestic hot water

Hot Water

System

position

in

Zll

Can

Go to

Pilot

sheet

be lit?

1

-

Main

lamp in

give

Switch

light?

1

-z

Go to sheel 2 Go to

Heating

Switch

Main

.

to l. Does

Burner

sheet

3

\

Set Heatinq

"o-"

Switch lo

and draw hot water

Note 14: For this

purpose,

Thus the micro the warm water tap. With a water

via

switch

the switch lever which

must

section lf

the micro switch does not

For

this, unscrewthe support

Fix

section.

56

open the control

swilch is accessible

be removed

the suOport in this

and checked

box as described in Note

and the movement

flow.quantity

can be adiusted. lf

operate despite the fact

micro

ofthe

Dosition.

ol approx. 1 l/min. the

(diaphragm).

switch

and

.l

and remove front

of the switch

the switch

that the switch

push

itdownward

Din

of

switch

until the

panel.

the water

of

the wdter

moves,

section can

must move

section

the

switch

switch lever contacts thetop

be observed. Ooen

and operate the micro

not hove,

does

lever must

be readiusted.

the water

oiwater

lsvoltage

240 V AC

lsWater

Slection

tested?

from

\

Cover. Ooen and

hot water iap.

Din of waler seclion

to move up and

Draw otf one

Pin has to be

Water Sedion

seruicing

Ref.

Does

Main Burnet

electricRy,

Swkh off

t€move Control

Diaphragm

l/min. and

positjon.

in

lf not, clean

according

instructions. to note 14. Switch on eleeticity.

NO

4

Box close

has

down.

upper

R€peat the checlG: A. Earth Continurty. C. D. Resistance to Earth according to tor British Gas Mullimeter.

tollowing

Polarity.

Instructions

Beplace

ls Micro

Swildt

acluated?

Micro Switch.

lsvoltage

AC trom

240 V

Adiust Swilch

by slac*ening

in

elongated

Bet. to Note 14.

t

ls voltaoe\

240VAC?om

Lever screw

hole.

'

Close Control

Box.

57

VCW-sine 18 TgW

vcw20/1 T3w vcw2s/1 T3w

A1

=

to A12

Multiplug A

=

81 to E1

T2toTs

bkl

811

to

E12

to bks=

= =

Multiplug B

Multiplug Electronic Single Plug Terminals Black Wire

Marking

Electronic

on with

Number

U6 IUI-

t(vl! lValllantl

L--

FLOW SWITCH

OVERHEAT CUT-OFF

DEVICE

HEATING

SWITCH

(DOM.

412 br

DIFE

PRESS SWITCH

HOT

WATER)

810

gv

TIME

CONTROL

ANDTOR

ROOMTHERMOSTAT

Fig.

98

58

FROST STAI

NTC-RESISTOR

vEffi$iii#*

M

FLOW SWITCH

_RESISTOF

NTC

OVERHEAT CUT-OFF

DEVICE

\

I

z cc

F

o

U

J

Fig.

99

i

o

59

Fig.

100

Fig.103

12 11

E 3

9

o

60

Fig.

105

10

Short Part list

Key No.

1

diaphragm 2 washer 3 diaphragm 4 overheatcut-offdevice

flowthermometer

5

pressuregaugq

6 7

switch I screw 9 support

10 11

12

'13 '14

15 16

17 18 19

20 21

22 23

24 25

26 27 28

board

piezo-unit

knob

screw

automaticairvent

expansionvessel

draughtdiverter

panel

side

side frontpanel centresection door

support protec{ioncap

burnercomplete

thermocouple knobcomplete

cover duct bolt complete high tension lead

righthand

panellefthand

Description

vcw...20 vcw...25

VCW...20,

VCW-sine

vcw...25

VCW...20, VCW-sine

vcw...25 vcw...20,25

VCW-sine vcw...20,25 VCW-sine vcw...20.25 VCW-sine

VCW...20 VCW...25

green

red

18 18 18

NaturalGas NaturalGas

18 18

Part

Number

01-0318 98-0151 02-0220 10-1363 10-1002

10-1008

13-0132 07-0334 08-6165 09-1008

14-3935

14-0012 06-1704

18-1001 07-3965 07-3966

07-1143 07-3730 07-1144 07-3729 07-1043 07-4161

07-1044 20-8619

07-1046

07-4008

15-4n5

07-2306 04-4563 o4-45U 17-1125

11-4208 11-4209 07-2313

094102

08-4432

G. C. Number

262329 262335 262356 262494

263906

262907 262489

263986 263987

262488 263935

263 950 262418 262419

262446 262427 262425 262426 262437

.263973

262439 263974 262433 263976

262416

262398

262382 262383 262402

262477 262478 262223 262216 262215

61

11 Technical

Data

Type

Nominal heating

gross

(based

on

Pilot burnerjet size

lorNG

Main burnerjet

IorNG

Burner setting

Minimum heating system

Delivered GrossC.V. Gas consumption

Nominal for domesticwater

Nominal capacity ofdomesticwater

Water capacity ol heat exchanger

Nominal size oftlue

Max. flowtemperature

Milimum capacity of system forsealed system

Maximum water Minimum static

for

Minimum

for domestic supplyof

Pump central heating system appliance UPS

Weigth Electric

connection

1)

For systems

size

pressure

waterllowlor

20

gas

(s.t.p.)

capacity

pipe

nominal

water-

total

heating

1))

(cold

heating system

open

water

1 l/min.

pressure

as delivered about

1 8-60 spare

having a larger

capacrty

input

C.V.)

"C

rise

(s.r.c.)

(water

f low)

pressure

head

pressure

for

available

head about

Voltage

Input

internal Fuse

external Fuse

125

(5)

VCW

T3W

2511

)64

(e0800)

(1212OO)

t1t7 A\

34

1 6x7/1 30

(3,61)

9,0

1

250

G20

(1

s9,9

(1

3,38

26,6

(1

51 3)

Aq

(1

,87)

0,30

(0,066)

(1

90

(57,2\

260

(142J

1O

(2,13)

0,15

VCW

2011 T3W

24

(81

e00)

(86,4)

31

(1

05800)

(1

1 1,6)

34

14x7h30

(3,61)

9,0

1

000

(222\

G20

(1

39,9

(1

2,95

24

(1

365)

7,6

(1,67)

0,26

(0,057)

070) ,741

o,2(2.84)

(8,4)

0,25

(1

59

30)

water capacity an additional expansion

0,205

(1

60

240/50

120

2 3

VCW-sine

(66500)

(88700)

12x1 125

10,6

070) ,99)

39.9

2.47

s4)

(6,9)

32) 68

vessel can be

installed

T3W

(7O,2)

26

(e3,6)

40

(4,26)

900

(200)

G20

(1

o7o)

(1,45)

19,5

(1

1 09)

6,2

(1,36)

o,26

(0,057)

(1

5ol

18

easily.

number x mark

mbar

(lmp.

MJ/m3

m3/h

(BTU/min)

limin

(lmp.

G./m. 81

(lmp.

l(lmp. Gal.)

bar bar

bar

kg

Amp Amp

Subject

(BTU/h)

(MJ/h)

(Bru/h)

(MJ/h)

marKrng

(in

WG)

Vh

Gal./h)

(BTU/cu.

(c.f.m.)

(45

K rise)

'F

rise

I

Gal.)

mm (in.)

"c

fF)

(P.S.l.)

(feet)

bar

(feet)

bar

(pound) VlHz

(slow) (slow)

to alteration.

!

ft)

f,

Headquariers Vaillant Ltd. Vaillant House Medway Trident Close Rochester/Kent MEz 4 EZ

Tel.0634-712868(Sales) Te|.0634-712844

0891 b

Estate

City

(Service)

-

in Germany - lmprimd en Allemagne

Printed

Central Region Office Vaillant Ltd.

5

Unit Providence Providence Street Lye, Stourbridge West Midlands DY 9 8 HO

Te|.0384€91816(Sales) Te|.0384{93368

lndustrial Estate

(Seruice)

Northern Region Vaillant Ltd. Vaillant Building

Euroway Estate Wharfedale

Bradford West Yorkshire ret.0274-688322

Road

(Sales/Seruice)

Otfice

BD 4 6 SB

Vaillant VCW 25 1 T3W, VCW-SINE 18T3W, VCW 20 1 T3W User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual