Glow-worm ASCOT 1.4S Installation & Servicing Instructions Manual

206416.05.93
COSHH

Installation,,'&

-

S errzicing{nstru

ctiorfsr

ffiS"pd,t+y;tths,thregs;9.$f

ASCOT

1.4S

Instantantaneous

Multipoint

Balanced

Flue

Water

Heater

Number

52

Technical

Services

Departnenl:

Telephone:

Belper

(0725)

g2gl00

410 mm
(16$

in)

; HEATER

i

'-------

-

-l- -- -- ----'

I

I

WATER

INLET
CO N N

ECTION

15mm

O.D.

655

mm

(2ffiin)

WATER

OUTLET

CONNECTION

15mm

O.D.

0

oo, coNNEcloN

15mm

o.D.

q

WATER

CONNECTTONS

l'r

c\t
<t

Diagram

1

lbu mm

(s*

in)

305

mm

(

12 in)

q

GAS CONNECTION

(1i€ in)

\E

il r,,

1 General

The

Glorv-rvorm Ascot 1.4S

has

been designed for

surface

mounling

and will

supply

hot water

direcr

to a bath,

basin,

kitchen

sink

and,

via

a

suiuble

mixing

valve

to a

shower.

Important:

This heater i.:

for

use on

Narural

Gas

only

and

must not

be used ;rittr

any orher

gas.

1.1 Installation

Requirements

The

insmllation

of this

warer

hearer musr

be in

accordance with

the

relevanI

requirements

of

the

current

issue

of

the

Gas

Safery

(Insullarion

and

Use) Regulations,

The Building

Reguladons,

Local

Water

Company Bye-laws

and The Buildinq

Srandards

(Scotland)

Regulations.

It is the

Law

that ALL

gas

appliances

are insnlled

in

accordance with

the above

regularions.

Failure to

install the

hearer

correctly could lead to

prosecudon.

It is in

your

own

inter-esr and

frat of

safety to

ensure thar

the law

is complied wirh.

The installation

should also

be

in

accordance

wirh

any

relevant

requirements

of

the Local

Authoriry

and the relevant

requiremenB

of the currenl issue

of

the following

British

Srandard codes

of

pracrice,

85689l,

855546, 856700

and BS5440

Parts I

and 2.

Addidonally

it

is

essential

that this

heater

is

assembled

and

installed strictly

in

accordance

with these

instructions.

IvlaximumWaterPressure

l3bar(188.5Ibf/in:)

1.2

Ratings

Nominal

Input

Nominal

Output

Injector
Burner

Pressure

lVeight

30.27kw

(i030008tu/h)

22.7k\Y

(775008tu/h)

Aa

16.5mbar

(6.6in

rr'g)

?iko

f il lhl

Nominal

burner

pressure is

16.5mbar

(6.6in ti'e)

at

2Ombar

(8in

wg) inlet

pressure.

Due to

variations

in

gas

supply

and

heater

tolerances

the

measured

pressure may

vary

betrvcen

l7.5mbar and

15.5mbar

(7.0

and 6.2in

wg).

1.3

Gas

Supply

In

addition

to all

other

demands the

metcr must

pass

the

following Natural

Gas:

2.87m3]h

of 38mJ/m3gas

(103ft3/h

of

l0008tdfLr

The

meter

governor

should

ensure a consnnt

outlct

pressure of

2Ombar

(8in

wg).

1.4 Washing Machines and Showers

This heater is

capable

of

use

with washing

machines

and

showers but

it

will

involve additional

plumbing

requirements.

For full

derails

please

refer to the enclosed sheet, or

contact

Hepworth Heating

Ltd.

1.5

Sheet Metal

Parts

When

installing or servicing

this

heater, care should

be raken

when handling

sheet

meul

parts

to avoid

any

possibility

of

personal

injury.

2.1

Siting

The heater should be

sited

such that

the minimum

internal clearances are

provided

as shown in

diagram

2.

The

balanced

flue terminal

must not

be sited

where

there is a

possibility

of the

products

of

combustion

re-entering

the

heater

or adjacent

doors or

windows.

The minimum accepLable

spacings from the

rerminal

to

obstructions

and

vendlation

openings are

specified in

the Terminal Posirioning

Table.

Where

thc terminal

is

less

than

2metres,

(6fr6in),

above

lhe

level

of

any

ground,

balcony,

flat roof

and

the

like,

to

which

any

person

has

access

and

which

adjoins the

wall

in which

the

terminal

is

situated,

a durable lerminal

guard

must

be

firted.

Guards

are available from

The Tower

Flue

Components

Ltd., telephone

Tonbridge

351555

quoting

reference

"C

orange",

or

from

lvlessrs

Quinnell,

Barrett.

and

Quinnell

Lrd.,

884, Old

Kenr

Road, London,

SEl5,

quoting

reference

"Type

P4".

If

the terminal is fiued wirhin

850mm

(34in)

of a

plastic

or

painted

gurter

or

450mm

(18in)

of

painted

eaves, an

aluminium

shield

of a[

leasr.

750mm,

(30in),

long

should

be

fiued

ro rhe

underside

of the

gutter

or

painted

eaves.

2.3

lnstallation

in

Confined Spaces

The heater

may

be

fitted

inro

confined

spaces,

for

example under

rvork

surfaces, cupboards

and the

like,

provided

that the

minimum

insmllarion

c{earances are available.

Cupboards

and the like

should

be

deep enough

to enable

the case

front

to

be

withdrawn.

High

and low

levcl

air

vents

must

be fitted in

the

cupboard

or compartmcnt, the

ventilation

area must

bc

as

shorvn in

the

Air Vent

Table.

Note:

Both

high and low level vents

musr

communicate

with

the

same room,

or

internal

space,

or

must

both

be

on

the

same wall

to

outside

air.

The hcater

may

be

mounted

dircctly

onro

combustible walls

or

walls

otherwise likcly

to be

affected

by heat wirhout

specific

precaur.ions,

subject to local

regularions.

:,i'i':t

@

E

o

8@

N
q

Recommended

Minimum Clearances

from Walls,

Ceiling, Floor,

Cupboard, Worktops etc.

mm

in

L.ti. and

R.ll. side

of casing

25

1

Top

ot

casing

40

1

+

Bottom of casing

155

6+

Front of

heatr.)r

(from a

610 24

permanent

sur{ace)

t1

a

D

Diagram

2

AIR VENT

AREA TABLE FOR

COMPARTMENT

INSTALLATIONS

POSITION

OF

AIR

VENTS

AIR

VENT AREAS

AIR FROM
ROOM

OR

INTERNAL

5HAUtr

AIR

DIRECT

FROM

OUTSIDE

^^2

in2

cm2

in2

HIGH

VENT 273 42

rJo

21

LOW

VENT

273

42

tJo

21

2064

1 e

2.5

Timber Frame

Buildings

If the

heater is to be

fiued

into

a building

of

timber

frame construction,

advice must be sought

from the local

gas

underraking

or

Hepworth

Heatine

Ltd.

TERMINAL POSITION

MINIMUM SPACING

mm (in)

1

FROM VERTICAL DRAIN

PIPES AND SOIL

PIPES

IJ

(3)

2 DIRECTLY BELOW AN

OPENAELE

WINDOW,

AIR

VENT,

OR

ANY

OTHER

VENTILATION

OPENING

3

BELOW GUTTERING,

DRAIN PIPES OR SOIL

PIPES

4 BELOW

EAVES

5

.

ABOVE

ADJACENT

GROUND

OR BALCONY

LEVEL

300

(12)

1

6

c.|J

r-

BELOW A

BALCONY

FROM

INTERNAL OR EXTERNAL

CORNERS

FROM

A SURFACE FACING

A TERMINAL

FROM A TERMIN,AL

FACING

A TERMINAL

600

(24)

3.1

Preparing

the

Site

Position

the template

provided

on rhe

wall

in rhe

required

heater

position

and mark location

of

the

balanced flue hole. Ensure

that

rhe

minimum

clearances

lor installation

are available,

see

diagram 2.
Cut the hole,

350mm

wide

x

236mm high

in

rhe

wall

to accept

the

liner,

see diagram

3.

ivlalie

good

any

plasterri'ork necessarl' at this

srage.

When dr,v, select

the

liner

rvith

the

turned

flange at

one

end

and

push

it into

the cavity until

the

flange

is flush

to the

wall.

Reposition

the

template on

the

wall in line

with

the

wall

opening

and

mark

positions

for the two

frxing

screws

at

r.he

base

of

the appliance.

Drill

and

plr.:.' the

fixing

holes

suirable

for

No.l0x50mm

lons

woodscrews.

PREPARED

HOLE

IN THE

WALL

--r-

t^^^

t/<hmm

l(s*in)

I

V

(16

in)

TTOM

LES

FIXING

V

125

mm

70

mm

(21in)

Diagram

3

c{

v

(aif

in)

FRONT
CASE

CONTROLS
TRAY

o

ct
+

CASING

SECURING

SCREWS

Diagram

4

3.2

Preparing

the Applianbe

The

controls

lray should

be

removed

by

pulling

it

forward and

disengaging.

Refit

as required after

insullation, see

diagram

4.

Undo the two

casing securing

screws,

diagram

4,

which rerain

the front casing,

ease

the

case forward

at the bottom

and

push

upward until clear of

the

fixing bar

at the top of the

appliance, the

front

casing

can

now

be

removed.

Remove

the flue hood by releasing

the hook and

bols

from the

water

pipes

on

the

heating

body

and

undoing

the two screws at the back of

the

flue

hood.

Care

should

be

taken to

avoid

knocking

or

distorting

the top of the heating

body,

see

diagram 5.
Remove the

backing

strip

from the

self

adhesive

seal

provided

and fit it around the

spigot

on the

back o[

the heater

with

the

wide adhesive

edge

to

the

back of

the case,

see

diagram

6.

3.3

Fitting the

Appliance

Flue

Set

Note:

The sandard

flue set covers

wall thicknesses

from

100mm to

380mm

(4in

to

15in). For

wall

thicknesses up to

533mm

(2lin)

an optional

flue set

is

available to order.

At this

stage,

account must

be

taken

of

the

wall

thickness.

If less than 230mm

(9in)

the duct

and

liners will have

to be cut to

suit.

The

pars

afiected

are

the terminal assembly

"A",

diagram

6,

the out.let duct

"F"

and the

wall

liner sleeve

"G".

The smndard

flue

set can

be

cut to accommodate

walls

down to

i00mm

(4in).

Measure the

wall

thickness and subuact from 230mm

(9in)

to

give

the amounl. to

be

removed

from fre mating

ends of

componens

A,F

and G.

lr{ark out

and

carefully

cut the

required

parts, for

wall

thicknesses

of

230mm

(9in)

to 380mm

(l5in)

the sundard flue

set

requires no modification.

Fix the

three slotted straps

"D"

to the terminal

wall

liner

"A"

by

inserting

them over

the

lugs on the

terminal.

Bend

bottom

lug

flat then

bend

three

remaining lugs

so

that

straps are held firmly

in

posiLion.
WARNING: TAKE

EXTREME

CARE

TO

AVOID

LACERATING YOUR

HANDS

WFIEN

BENDING

TFIE LUGS.
Note:

For wall

thicknesses

greater

than 230mm

(9in)

the

slotted suaps

need

be

fitted

only to the

lugs

nearest

the

heater

end of the terminal
assembly. The lugs further into the terminal
asscmbly are for use only when

be

flue

pars havc

bcen

cut

to

suit a

wall

lcss

than

230mm

(9in)

thick.
Fit

the

wall

plate

"B"

over

the terminal assembly

ensuring that

the

plain

side

faces outward.

FLUE HOOD

sEcuRrNG

scREW(2)-

HOOK BOLT(2)

Diagram

i.l;{:

:i

1

r

Fit the terminal assembly

into

the

wall from

the

outside

ensuring

that

the

slotted

strap

on

the long

side is uppermost.
Mount the

appliance

on the wall

by

fitting

the top

slotted suap

to the top lug

on the appliance

case.

This is

achieved

by

pulling

the top

srrap

right and

tilting

the appliance

slightly

from

the

borrom,

permanently

secure

the

strap

to

the lug

by

bending

the lug

forward.

Fit

No10x50mm woodscrews

to

the

bottom

of the

appliance

and

tighten.

Fit the

two remaining

slotted

straps

over

the lugs

on the

appliance case

and

secure

permanently

and

cut

surplus

length

off all

the

srraps.

Tape

the wall

liners

toget}er

from

inside.

Slide the

stainless

steel ducr

"F"

inro

the madns

seclion

as far

as

possible.

Tape ducts

together.

Replace

the flue

hood

and

secure

using two

rear

fixing screws

and

hook

bolts over

body warer

pipes

CARE MUST BE

TAKEN

NOT TO

DAMAGE

TIIE

HEATING

BODY.

Note:

The flue

set

can be

insulled from

inside the

building as

follows:

a) Proceed

to 3.3

above

b)

If necessary cut the ducts, see

puagraph

2

of

3.3.

c) Attach the slotted

suaps

"D"

see

paragraph 4

of

3.3.

d)

Firmly atLach a length

of stout

suing or

rope to

the

hole

provided

in

the

bottom

centre

fin

on

the terminal.

e) Remove

the

wall liner.

,) Feed

terminal assembly

through the

wall

to

the ouside.

g)

Feed the

suing

through the

wall

plate

"B"

ensuring that tlre

plate

is he correct

way

round,

and

then

guide

the

plate

through

the

wall

and

over the

terminal.

h) Feed the string through the wall

liner and refit

the

]iner

to the

wall.

i) Locate terminal into hole

and

pull

assembly

back

into hole

and

retain with the

string.

j)

Pass

suing through

appliance and mount,

refer

to

above, and

then

remove

the string.

k)

Now continue

as

above.

3.4 Water Connections

The

water

service must

be

in

accordance

with

the

current

issue

o[ 856700.

The heater's water

connections are by

15mm

o.d

copper

tails. The

outlet

rail is fitted

in

manufacture but the

inlet

rail and

water

service

cock are supplied loose. These

should

be

fitted

as

shown

in

diagram 7,

give

due attention

to the

orienLation of

the

service cock.

The cold

water

connection

can

be either

from

the

mains or a cistem.

A TERMINAL

ASSEMBLY

B

OUTER

WALL

PLATE

C

OUTER

CASE

D

FIXING

STRAPS

E FLUE

HOOD

F

OUTLET

DUCT

G WALL LINER

SLEEVE

H

SELF-ADHESIVE

SEAL

The minimum

water pressure

required

to

fully open

the

gas valve

is 2.29m

(?.5f0.

However,

where

the water

pressure

is limited,

for

example

on a cistern

supply,

then

for

practical

purposes

a

head

of 3.29m

(l0ft10in)

is

required

witlr

normal piping

to

give

a

water flow rate

o[

T.llitres/m

(l.6gallmin)

and a temperature rise of

4aoC

(80oD.

The head

of

water is

measured

vertically

between

the level

of

the water in

the cistern and the level

of the

highest hot water

draw

off

tap. For

direct

mains

connections,

(subject

to

local

water

company

regulations),

tie size may

be 15mm copper tube to

BS287l

where

sufficient

pressure

is

available.

If

the heater

is fitted

to

a mains

supply

which is

subject to

variable

high

pressures,

it is

recommended

that

a water

governor

is

fitted to the

heater inlet

pipe.

A

suitable

governor

is the

Dereve

010521o4, available from

Dereve

flow

Conuols)

Ltd.,

Park Lane, Handsworth,

Birmingham,. B21

8LE telephone 027

553

7021. If

a

warer

pressure

limiter

is required this

may

be

connecred into rhe

water pipework

adjacent

to the heater

or

may

be

fitted

on

the heater,

after

removal

of the

venturi

cap, see diagram

10.

If the

inlet

tail is

ro

be soldered

into

rhe

supply

system

it is recommended

that

the

water

service

cock

be

removed whilst

maling the

joinr.

This is

to eliminate

the risk

of damaging rhe

seal in the

service

cock.

Flush

out

all foreign

marter

from the

supply

pipe

BEFORE

connecting

to

r.he

heater.

Connect the

hoc

water

system to the

water

outlet

tail, see diagram

11.

Check

rhar there

are

no

water

leals

after connection.

Ensure

that

all

the air is

expelled fron; ihe

rvater

system

by tunring on ALL hot warer

dra,r, off raps

and

then turning

them

off

in

sequence,

snrting

with

the

draw

off

tap

at the

lowest level.

Refit the

outer case.

3.5

Gas

Connections

The

gas

supply connecrion

is

made

by rhe i5mm

o.d

copper

uil

pipe.

This

is

supplied

loose wirh

the

gas

service cock.

They

should

be assembled as

shown

in

diagram

9.

When

making

the

connection it

is

important

rhar:

a) The

gas

inlet

pipe

musr pass

above

rhe

thermocouple

and union

nut.

b)

The

service cock

be

removed

during rhe

soldering

process

if

rhe inlet

rail is

soldered

into the

supply

sysrem. This

is

ro

eliminare

the risk

of

damaging

rhe

service

cock

seal.

c) The

pipes

are

blown rhrough

before connccrion

to

prevent

forcign

matter

entcring

the

heatcr.

The size of a straight unrestricted

gas

supply

from

the

meter to the

heater

should be as

follows:

Disunce

from meter Gas

supply outlet

to heater

outside diameter

l5mm
22mm
Consult the

local

gas

company

These sizes

are for

the

heater

only and

do

not

take

account

of any

other

gas

appliances

which may be

connected

to the

same

gas

service

pipework.

0-3m

(0-10ft)

3-20rn

(10-65f0

20m

(65ft)and

above

OFF

POSITION

(Turn

90"

for

on

position)

N

INLET

WATER

CONNECTION

Diagram 7

WATER

SERVICE

COCK

GAS

INLET

CONNECTION

N
l-.

Diagram

B

GAS

PRESSURE

TEST POINT

GAS

INLET

TAIL

PIPE

GAS SERVICE

COCK

(Shown

in

'OFF'

position)

2064 1 6

4.1

Preliminary

Checks

Remove

front

case

and

conuols

uay.

Turn

the

gas

"Ofl',

turn

water on and

check for

watcr leakage

around

thc

heater.

Relit thc outcr

casc and

sccurc.

Turn

thc

gas

servicc

cock

"On".

It is

on

when

the

screw

driver slot

is in

linc with

the cock. It is otf

when the

screwdriver

slot

is

across the axis

of

thc

cock,

sec diagram 8.

Turn

thc

watcr

supply

on

in

a

similar

manncr

the

gas

supply, scc diagram 7 and chcck

that

water throttlc

is

not fully closcd,

sec

diagram

Opcn

all hot

watcr draw off

taps

individually

wait until

thc

water florvs frccly.

Closc

each

off

tao

in

turn.

lrl

the

10.

and

draw

4.2

To Light the

Pilot

Turn thc

gas

supply

on.

Fully

depress

the

"grs

on"

button

I

and operate

the

spark

ignition button ,Arz

until thc

pilot

is

lit,

see diagram 9.

Thc

pilot,

which

is

situatcd

to thc

lcft

hand

sidc

oi

thc

hcater

may

bc sccn

through the

pilot

vicrving

window,

sec

diagram

9.

Kccp

thc

"gas

on"

buLton

I

pressed in for

l0

scconds

thcn

rcleasc.

If

thc

pilot gocs

out

purgc

thc systcm and

rcpcat thc

opcration.

4.3 Adjustment of

Water

Temperature

Opcn

thc HOT

water

draw-off up

furrhcst

from

thc

hcatcr. Ensurc

that the

"SummerAVinter"

control

is

in thc

"Wintcr"

position,

scc diagram

9. Adjust thc

watcr

[hrottlc to

givc

thc rcquircd

\viltcr

ratc,

scc

tliagrarn

i0

(turn

anti-clockrvisc to

opcn).

A

watcr

ratc ol 6.7litrc/rnin

(i.5gal/rnin) r

\ii:h

is

9

scconds

to

fill a I litrc contirincr,

(5

scconcjs

;o

t'ill

a

I

pint

contlincr),

will

givc

a [cmpcraturc risc ol.

rbout 50"C,

(90"R.

Ar

watcr

ratcs

bclorv

6.7

litrc/rnin

(1.5

g:rl/rnin)

thc

\\':.ltcr ratc

will

proportion

thc

sas

ratc to

a

controllcd

lcmpcralurc

risc

sclcctcd

by'

thc

"SumrncrAVintcr"

control.

Ahcrnutivcly

it

may

bc

dcsirablc

to

sct thc

\\,atcr

to

lu

highcr flow

ratc

which rvill

rc.sulI in lorvcr

rvirtcr

tcn)pcrilturc.,i

dcpcnding

upon

thc

llo\\'

sr't

ilt thc

tilp.

This

allorvs

watcr

to

bc tlrarvrt ot't'

l'rom

thc

butlr

t:.rp

at

a suiublc.

[ctnpcri.lLurc

lbr

bitthins.

ll'highcr tcrnpcrilturcs

rrc rcquircd

at thc

othcr

orrtlcts

thc tcrllpcraturc

ciln bc controll'--d

bv

grlrlualll'

closirt{ thc

out['t tap

until a

tcrl]pcri.lturc

risc

ol' about -iO"C

(90"F)

i.s achicvcd.

'\n1'

lirrthcr rctluction

in

Ihc

rr'utcr

rat.c

*'ill

rcsult

irr

tlrc

tr'rnpcrlturc bcing controllctl

b1' thc hcutcr.

4.4 SummerMinter

Control

Thc

SummcrAVintcr

control

is intcndcd

to

rcducc

the eflcct

of

scasonal

variation in

u'atcr

supply'

tcmpcrilturc.

In thc

"\\'intcr"

position

thc

hcltcr

clclivcrs

a controllcti

tctnpcraturc

risc

ol

abouL

50''C

(90"F)

and

in thc

"Sumrncr"

pt-rsition a controllc'il

tcmpcri.rturc

ri.sc of about

-l-l"C

(80'F).

It

shoulri

bc

notctl

lhat

*ittcr llorv

ratcs itbovc

6.7

litrc/min

(1.5

gal/rnin) :rc outsiclc

thc

ranSc of

thc

controllcd

tcmpcritturc

tacilit,v and

thus rcndcr

thc

"surnrncrAVintcr"

control

incfl'cctivc.

In usc,

thc

control should

bc

sct

at

thc

"\\'intcr"

position in thc

s'intcr

and

spring

rnonths ttrtd

sct Itt

thc

"Summcr" position

in thc

sunrlncr

antl

auttlllln

rnonths.
Note: lt

is importltnt

thrt

tluring

lhc sutl]ttlt-r

rnonth.J thc

control

is turnctl

ttl

"Surnrncr"

llosititlrr

i,l:i outlct

tctltpcrilturcs

in crccss

tll'

(10''C

(lJ(I'F)

rnuy

rcsult

in scllc

lbrrttation

lttltl

rctlucctl

cll'icicncy

ol'

thc

he-iltcr.

P

ILOT
VIEWING
WINDOW

SU

M

MER/
WINTER
CONTROL

//rGNlTlON

I

cot

ot

O

orr

T

Diagram

9

WATER THROTTLE

ADJUSTING

SCREW

(Turn

anti-clockwise

to open)

N

VENTURI

WATER

TEMPERATURE

ADJUSTMENT

I-\i^^zrm 1 A
ulo9rqrrl

lv

zuo{ | o

4.5 Slow

lgnition Device

When thc

pilot is lit and the

watcr

throttle

adjusted

to the

desired

flow ratc it

may

bc

necessary to

adjust

thc slow

ignition device.

This is

donc by

adjusting

the

screw on

thc

diaphragm housing,

sec diagram

ll. Turn IN to

dclal'

OUT

to advancc the ignition.

Check

that

after

adjustment

the

ignition is

Smooth

'

but

rr'ithout

unduc delay.

4.6 Checking the Burner Pressure

When ignition adjustrnents have

been

completcd

atnch a

pressure

gauge

to the

pressure

tcst

point

after removing the

scrcw and sealing

ring,

see

diagram I l.
Light thc

pilot

and

fully

opcn

the

HOT drarv-off

tap furthcst

from

thc

hcatcr.

Chcck the burncr

prcssurc

acainst the

valucs

givcn

in

Section

1.3.

4.7 Checking Summer/Winter Control

The

SummerfiVintcr

control may

be checkcd

for

correct

opcraLion

as

follorvs.

Set the control

in

the

"Winter"

position.

Incrcasc

u'atcr

fio*,

until maximum

burncr

prcssurc

is

obLaincd, 16.5mbar

(6.6in

wg)

nominal.

Gradually

reduce

watcr

flow

until

burner

pressurc

just

bcgins

to

fall,

that

is

the

prcssure

is

bctu'ccn

maximurn

and

15.Smbar

(6.3in

u,g).

Without

altering he

*'atcr

flow, tum

control [o

"Surnmcr"

position.

Thc

burncr

prcssure

should

drop

b1'

about

2.5mbar

(lin

rvg)

when

thc srvitch

is

functioning

corrcctli, and

thc

grs

inlct

prcssurc is

corrcc

t.

Rcscuing

thc control to thc

"Wintcr"

position *ill

nol

rcturn prcssurc

to thc original

valuc.

To rcpcat

thc tcsr.

sct up

as in

Scction

4.6.

Turn

ol-l' thc HOT

\\,atcr

[lrp.

Rcrnovc

prcssrlrc

girusc,

rcplacc scaling

rinq ancl

scrc\\'.

Rcfit controls

tral'.

4.8 Instruct the User

Irnportunt. Inslruct

thc uscr

in

thc corrcct

and

safc

opcration

oi thc

hcatcr.

Hlntl thc Instruct.ions

for

Usc

to

thc

uscr

for

thcir

rctcntion.
Lcavc thc

Instlllation Instructions

with

thc uscr

for

usc during [uturc scrvicc

calls.

SLOW

IGNITION

DEVICE

SETTING SCREW

PRESSURE
TEST POINT

Diagram

11

zuo{ I o

The

heater should

be

serviced

regularly

by

a

competent

person

to

ensure long

life

and efficient

use.

For

normal domcstic

installations

servicing

at

annual intervals

is

recommendcd.

Belorc

commencing a service, turn off

the

gas

and

water supplies

at

the

service

cocks,

see

diagrams

7

and 8 and

drain the

water

from the appliance

if

necessary by

rcmoval

of thc drain

screw

in

the

water

service cock,

see diagram 7 and opening

one

of

the hot

water

taps,

On

completion of

the service the drain screw

must

be

replaced

and

the appliance

checked

for

gas

and

waler soundness.

5.1

Burner

Remove

the burner

as described in Section

6.2.

After

removal the burner should be

inspected for

damage

and

any deposits

removed with

a soft

brush

or

a

vacuum

cleaner.

5.2

Pilot Assembly

Remove

the

pilot

assembly as described in

Section 6.5.

The thermocouple

should

be

removed

as

in

Secdon 6.6

its

condition

inspected.

Replace

if

necessary.
Inspect the

elecrrode for

damage.

Replace if

necessary, see Section

6.7.

The

pilot

burner

should

be

pulled

off

and inspected

for

damage and

any deposits cleaned away

with

a

soft brush.

Inspect

the injector for

deposits or

blockage

which

should

be

carefully removed and

the orifices blown

clear, see diagram 12.

Check

the

pilot

fiiter, see

Section

6.9.

After reassembly

ensure

that the elecuode

to

pilot

dimension

is

as shown

in

diagram

13

and that the

pilot

flame

strikes

the thermocouple.

Guidedimensions

are

given

in

diagram 13.

5.3

Body

For normal annual service the

body

need not

be

removed

but should be

examined and all deoosis

formed brushed

from the heat exchanger.

Remove

the

flue

hood

as described

in

Section

6.3.

Pcriodically

it may

be

necessary to remove the

body,

see Section 6.4, for descaling, the

time

interval

for

this

work

wiil

be

determincd largely

by

the

amount of usage and the hardness

of

the

water.

5.4

Diaphragm Assembly
and

Automatic

Gas

Valve

Annual servicing of this component will normally
include only

the checking of

the

diaphragm

and

regreasing

of

the

gas

valve

spindle.

BURNER

--l-_----

The spindle

may be

removed after

having

retno\'!'d

the

diaphragm

as

Section

6.

DO NOT USE

GRIPS

when

pulling

the

gas

valve

spindle

out of

is

location.

Inspect

the spindlc

for sulightncss

and

for score

marks.

If

in

any

doubt

rcncw

this

itcrtr.

Clcan

the

spindlc

carcfully

with

a soft CLEAN

cloth

and

apply

siliconc

grclsc, Dorv

Cornirts

l1 I

or

equal,

to

the spindlc.

Replace

gas valve spindlc

ensuring

that

it

moves

frccly.

If

it docs

not,

examine automatic

valve

spindle

scals

for

wear.

On

completion

of servicing

the

appliance

shotrld

bc

rc-commissioned

as

Section

4

to

check

the

opcrrttion

of

the summer/wintcr

switch,

water temperaturc

ltnd

flow

rate,

gas pressure and

thc

like.

F\i^^.am l2
uldvrqrll

l9

10

Removal and

replacement

of

parts

must. be carried

out by

a competent

person.

Before removing

any

gas

carrying component,

turn

off

the

heater at the

gas

service

cock.

After completing the

replacement

of

gas

carrying

components,

a]ways test

for

gas

soundness

with

a

suitable

leak

detection fluid.

6.1

Front

Case

Remove

controls tray

by

pulling

forwards and

disengaging, see diagram

14.

Unscrew the

two securing

screws on

the

lugs at

the

bottom of

the front.

case.

Pull

bottom

of

case

forward

and

lift

the

case

up*'ards to

clear

the

retaining

brackets

on the

top

of

the main case.

The

front case

can

now

be

pull

forward

and

removed.
Reverse this

procedure

to

refit. front case ensuring

that.

case seal

is in

good

condition and

seated

correctly.

6.2 Burner

Remor,e

lhe

case

as Section 6.1.

Disconnect the ignition

lead

from

the spark

electrode,

see diagram 15.

Remove the sealing

plates

held

in

place

by

t*,o

M5

screws.

When

replacing

the

plates

care should

be

taken

to ensure that the

seal

is

correctJy

made.

\\/ithdraw

thermocouple

sufficiently to

clear

assembly

by

pulling

downwards. This

is

best

achieved

by

pulling

the

thermocouple

from

underside of base.
Disconnect

the

piiot

supply tube.

Remor.e

the cential lvl5

screw

securing

the

deflector

plate,

remove

deflector

plate

and

pilot

assembly.

Remove

the two M5

screws securing the burner

feed tube

flange

to

the uansfer elbow, see

diagram 16. Remove the

M5 scre*,

in

base,

withdraw

burner

and

burner

feed

tube

complete.

Separate the burner feed tube and

burner

by

rcmoving

the two

screws securing the

flange, then

removing

the tube.

Refit

in reverse

order,

ensuring that

both

"O"

rings

are

in

good

condition.

Renew if necessary.

Note. The

rear

of the

burner

is

located on

a

dou'el-bracket

and

it is

imporrant

to ensure

that

when

replacing

the

burner it is engaged

on

thc

dorvel-bracket.

M4
SCREW

SPARK

ELECTRO D E

M4

scREW

(2)

PII OT

ASSEM B LY

nr-r -^Tn6

L/trrLC\-t\Jn

PLATE
M4

NUT

(2)

M3

SCREW

IGNITION
LEAD
(CLEAR

END)

PILOT

JN I trLU

TH ERMOCO

UPLE

tvt3

SCREW

s

P ILOT
SUPPLY
TUBE

M5 SCREW

t)\

ct
s

SEALING

PLATES

Diagram

15

I

i

I
I

I

FRONT

CASE
CONTROLS

TRAY
CASING

SECURING

SCREWS

Diagram

14

>tu

11

:rl(iJ

1(i

6.3 Flue

Hood

Rcrnovc thc

frout casc

as

Scction 6.1.

Rclcasc thc hook bolts from

thc

hcating

body.

Using

a

long

scrcwdrivcr, rcmovc thc

two

screws at

thc

top

rcar corncrs

o[ thc fluc hood,

scc

diagrlm

17.

Raisc

thc

hood

to clcar

hcating

body and

pull

lorward

(o

rcmovc.

Rcfit

thc

fluc

hood in

lhc

rcvcrsc

ordcr,

taking carc

not

to

damagc

thc

hcating

body

and

ensurc

that rhc

hood

fits

squarcly

on thc heating

body.

6.4 Heating

Body

Rcmovc thc front

casc as

Scction 6.1.

Rcmovc

thc

burncr

as

Scction

6.2.

Rcrnovc

thc fluc hood

as Scction

(r.3.

Turn

ofl'

thc

watcr

scrvicc

cock

and

drain

dow,n

thc

hclting

body

by rcmoving

thc

plug

on rhc warcr

scrvicc cock, scc diagram

7 and

opcning hot

watcr

outlct taps. Collcct

watcr

in

a

suitablc conlainer.

Examinc thc

scal on thc

drain

plug

and renew

if
ncccssary.
Disconncct t.hc

lwo

watcr

connection

unions

on

body

lcgs,

sce diagram 17.

Li[t

thc

body

upwards

to

clcar thc unions

and

rcrnovc

lrom

thc casc.

Rcfit

thc body

in

thc rcvcrsc

ordcr, cnsuring

that

thc

body

frcc markcd

"Back"

is

to thc rcar

of

thc

hcatcr.

Rcncrv

lhc

washcrs

on thc union

connccIions.

6.5

Pilot

Assembly

Rcmovc

thc

casc as

Scction

6.1.

Disconncct

thc ignii:irn lcad

fronr

thc

spark

clcctrr>tlc,

scc diagrarrr

;5.

Rcrnovc

thc

two

sc:.rlinr:

platcs

hclrl in plucc

by

rrvo

,\'l-j

scrcrvs.

Whcn

rcplacinq,

clrrc

slroulrl

bc t:rkcn

to cnsurc that thc

scltl

is

corrcc[lv

ltrtrtlc.

\\/itlrtlnr*,

thcrrnocouplc

sul'l'icicntll,

[o

clcar

asscnttrly, b1,

pulling

dorvn*,ards. This

is

bcst

luchicvctl

by

pulling

thc

thcrmoccuplc liorn

rrntlcrsirlc ol-

basc.

Discurrncct

thc

pilot

suppll,

tubc.

Rcrrrovc

tlrc

lvl-l

scrcrv sccurin!:

thc

nilot

shicld

irnd

rcnlovc ylilot

shickl.

Rt'r'nr)\'c

thc

ccntftrl

irl.i

scrcrv sccuring

thc

(lcllt-ctor

plutt'.

Rcr|rrlvc

(lcl'l(-ct()r

ltlutc

untl

piklt

usscrtrhli..

l{crrrovc

tlrc trvo N'lJ

scrc*s

iln(l nuts

s!-curins tllc

llilot

usscrrtlrl)'

to thc

rlcl'lccrrlr

plutc.

Rr.til()\'c

I)ilor

lusse rrrlrI).

Itelsscrrrlrlc

llilot

irr r\:\'crsc

ortlcr rrrukirrg

surc thllt

tllc

tll[) lr,.'trvct'n thc sllurk

cl\'rtr(xlc

lrntl

piklt

lrtrrrrcr

is

Js

shorvrr irr

tliusrilru li lnrl

tlcllccttlr

l)llltc

rcsts

()n

tol) ol'tlrc

tulr lisc.d to

thc lcli-lrantl

sitlc

ol'

tlrc

lrurrre

r.

.:.-,'-\r |

"l

BURNER

FEED

TUBE

114

I ll-.----

I

tl

/7^' Bt tRN FF

TRANSFER

'O'

RINGS.-

'ffiffi

'rgi

0

-Pt:

"=-;*r^

^^,-/H

FLANiEI

n) itt?

s'b"nergl

(2)

lTLJP

J-

lfr r*

___g\___,_n5

s c R E\,

(2)

(2\

Diagram

16

FLUE HOOD
SECURING

SCREW(2)

HOOK BOLT(2i

Diacram

tz

6.6

Thermocouple

Rcmovs

lront

casc

as

Section

6.

l.

Rcmovc

rhe

scaling

platcs

hcld

in

placc

by rhc two

N'15

scrctvs,

scc diagram

15.

\\/ithdraw

thermocouplc

lrom

rhc pilot

assembly.

This

is

bcst

achievcd

by

pulling

rhc

rhermocouplc

from

undersidc

of

basc.

Withdrau,

the

thermocouple.

Repl:ce

in reverse

ordcr

ensuring

frat

rhe

scaling

plates

seal

correctly

ancl

that

thc

rhermocouole

connection

is providing

a

good

contact.

Note.

A

quarrer

turn

beyond

finger

tight

is

sufficien

r.

6.7

Spark

Electrode

Rcmove

rhe

pilot

assernbll,

as

Secrion

6.5.

undo

r\.13

scrc\\,

sccuring

the

spark elecrocle

to

pilot

assembly

bracket.

Rcplacc

in

reverse

order

cnsuring

that

the

gap

bclu,ecn

the

spark

elecrodc

and

pilot

burncr

as

shorvn

in

diagram

13.

6.8

Piezo

Unit

Rcmovc

control

ray

b1,

pulling

foru,ard

and

disengaging,

scc

diagram

14.

Rcmove

ignirion

lcad

from rcar

o[

piczo

unit,

scc

diagram

19.

Rcmovc

thc M5

scrcw

sccuring thc piczo

button

rctaincr.
Rcmovc piczo

button and

unscrcrv

piczo

unit.

Rcplace

in revcrsc

ordcr.

6.9

Pilot

Filter

Rcmove

conrrol rray

by

pulling

forward

and

discngaging,

see

diagram

14.

DisconnecI

rhc

pilor

supply,

tubc

at

conncction

to

main

gas

control

unit and

withdraw

thc

tubc. scc

diagram

19.

Rclcase

the

pilot

filrcr

cap,

notc

posirion

ol

scaling

washcr.
Rcmovc

filrcr

and

scaling

s,ashcr

from

housing,

rcneu,

thc

filtcr

and

scaling

lvashcr.

Rcplace

in

rcvcrsc

ordcr.

6.10

Main

Gas

Control

Unit

Removc

conlrol

tra;,

by'

pulling

fonvard

and

discntaqinc,

sce diagram

14.

Turn

thc

gas

:crvicc

cock

ol'l', scc

diasrarn

19.

DisconnccI

rhc

pilor

l'ccd

rubc

a[ connccrion

[o

lnain

qas

control

unit.

PIEZO

RETAI

BUTTON

:'* \

PILOT

SUPPLY

TUBE CONNECTION

M5

SCREW

N

PILOT

CONNECTOR

(FTLTER

CAP)

GAS

FEEDTUBE

UNION

NUT

PILOT

FILTER

HOUSING

,/

M5

scREW

,/

/

,^r^*ocouPLE

UNION

NUT

/

cAs

rNLET

TAIL

\

I

\,\

\u,,

IGNITION

LEAD

B

LACK

MAIN
GAS

CONTROL

UNIT

M5

SCREW

./-Z ll \

|

tsr I rull\

|

ufe':il'.IY,l''#

s

5

0

s

l'

o

N

)

(JAs

rhEs5ufit

TEST

POINT

MAIN

GAS

rtLttH

UNION

NUT

M5

SCREW

(2)

OPERATING LEVER

GAS

INLET

GAS

INLET

TUBE

l)irnrrr:r 1

(.)

'-'-':,'""' '-'

Disconnect. the thermocouplc

nut. from

rear

of

main

gas

control

unit.

Disconnect

the ignition lead

from

thc rear

of

piezo

unit.
Remove

thc

M5 scrcw sccuring

the

piezo

button

rctainer. Pull

oif

all knobs.

Remove

lhe four M5

scrcws

to releasc

clamping

plates

from

both ends of high

and

low

pressure

tubes,

see diagram 20 and2l

. Remove

tubcs

and

examinc

"O"

ring

seals, renewing

if

necessary.

Disconnect

the

gas

inlet

union nut.

at control and at

gas

service cock,

see diagram

19. Remove the

gas

inlet.

[ube, raking

care not

to damagc main

gas

filter.
Disconnect

the

gas

feed

tube

union nut

at conlrol

and removc

the two

M5

screws at automatic

valve

gas

feed

flange

connection

then

remove rhe

tubc.

The

main

gas

conuol

unit can nou,

be removed,

by

removing

the

lwo M5

screws

securing it

to the

bracket.
Replace in

reverse

order.

6.11 Electro-magnet

Unit

Remove

the main

gas

control

unit.

as in

Section

6.10.

Remove

two M5

screws

securing

the

operating lever

to thc

body

of the

gas

con[rol

unir,

see

inset

in

diagram i9

and remove

the

operaring lever.

Remove

single NI5

screw

on the.top

and rhe four

N'15

scrcws on the end.

Carefully

pull

magnet

unit clear

of

housing.

Replace in reverse

order.

6.12 Gas Filter

Remove

control

uay

by

pulling

forrvard

and

disenga_eing,

see diagram

14.

Turn the

gas

service

cock off.

Undo

M5 screws

to

rclease

clamping

plates

from

both

ends of

high and

low

prcssure tubes,

sce

diagrams

20

au;,d21.

Remove tubcs

and

examinc

the

"O"

ring

seals,

renew

if necessary.

Release unions securing

gas

inlet tube

to thc

main

gas

control

unit and scrvice

cock, see

diagram

19.

Remove thc tube. Examine

"O" ring

seal

and

rcnew i[

necessary.

Withdraw thc

main

gas

filtcr. Clean

or

renew as

necessary.
Rcplace

in reverse

order.

6.13 Summer/Winter

Control

Remove the conuols

tray by

pulling

forwards and

disengaging,

see diagram

14.

Turn the

water

service

cock off

and drain

the

heater at the drain screw,

see diagram

20. Examine

drain

plug

seal and

renew

if necessary.

Pull the summer/winter

knob from shaft.

Disconnect the

summer/winter

control

connection

and carefully

withdraw the summer/rvinter

assembly.

Examine

"O"

ring

seal,

renew il

necessary.

Reassemble

in

the

reverse order

ensuring

that the

summer/winter

knob

is

correctly

aligned

with

the

shaft before

pushing

into

position.

The

knob

should bc

positioned

so that

with

the shafi turned

fully anticlockwise

the

knob

points

towards the

word

"WINTER"

on

the controls

cover.

\\'hen

the

knob is turned

fully clockwise

it

will

point

tou'ards

the

word

"SUMlvlER".

6.14

Water Filter

Remove the conuols

tray by

pulling

fcr*'ards end

disengagin:, see

diagram

14.

Turn the

\\.rr^r

service

cock off

and drain the

heater at thc ciraiir screw,

see diagram

20.

Examine drain

plug

.eal

and renew

if necessrr\'.

IVATER

FILTER

SUMMER/
WINTER
CONTROL

CO N N ECTION

CLAMPING PLATE

PRESSURE

TUBE

WASFJES

SL,f\1l,lEF

,

\TINTER

X NOB

WATER

SERVICE COCK

WATEB

INLET
TAIL

AIN

SCREW

O

N/OFF

(sHowN

oFF)

206.{ 16

1A

Disconnect the union

nut at water

inlet to throttle

housing

and at

water

service

cock. Remove

tube

and

withdraw filter.

Examine

"O"

ring seal,

renew

if necessary.
Clean the filter or

renew

if necessary.

Replace in reverse order.

6.15

Diaphragm and Plate Assembly

Renrove the

controls tray by

pulling

forwards

and

disengaging,

see diagram

14.

Turn the

water

service cock

off

and

drain the

heater,

see

diagram 20. Examine seal on

drain

plug

and renew

if

necessary.

Remove the M5

screw

to

release the clamping

plate

from high

and low

pressure

tubes,

see

diagram

21.

Remove the eight

lr{5

screws securing the bottom

cover o[ diaphragm

housing.

Separate the

halves

of

diaphragm housing.

Note.

When replacing

diaphragm

ensure

that

the

high

pressure

side

is facing

downward.

fl

6.16

SpindFfg.l. - Diaphragm Housing

Remove ,r,"

.ffi ray

by

pulling

forwards and

disengaging,

see diagram i4.

Tum the

water

service cock

off

and drain the

heater,

see

diagram 20. Examine

seal on

drain

plr:e,

renew

if necessary.

Remove the lv15

screw to release

'clamping

plate

from

high and

low

pressure

tubes, see

diagram

21.

Examine

"O"

ring

sea-ls and

renew if

necessary.

Remove the

two

M5

screws

securing

the

diaphragm

housing to lhe

automatic

valve.

Carefully

withdraw

the

diaphragm

assembly downwards leaving

spindle

in automatic

valve

section.

Remove

brass

washer

to

expose

seal.

Carefully

prise

uut the

spindle seal and

replace with new

seal.

Lubricate

with

silicone

grease,

Dow

Corning

1ll

or

equal.

Replace

in

reverse

order, taking

care no

to bend

the

spindle.

6.17

Automatic

Valve

Complete the steps in

the

first

five

paragraphs

of

Section

6.16 to

remove

the spindle

and

seals.

Remove

the

burner

as

in Section 6.2.

Remove the

M5 screws at automadc

valve

sas

feed

pipe

flange

connection,

Remove

the four

M5 screws securing the

uansfer

elbow

to

automatic valve.

Remove

lhe

automatic Valve. Examine

gaskes

and

"O"

ring

seal, renew as necessary.

Replace in reverse

order.

sf

_ BRASS

WASHER

(a-\)l'

ffi-,.--

SPAcER

H" -----

vALVE

SPINDLE

l)-{

N

''

-/

BRASS WASHER

X'/.

\? .

JEAL

C')
q

M5 SCREW

(4)

TRANSFER

ELBOW

AUTOMATIC

VALVE

StAL

PR

ESSURE

th5 I

POINT

SCREW

/

M5

SCREW

(2)

M5

SCREW

(8)

DIAPH

RAGM

AND

PLATE

ASSEM

BLY

HIGH

PRESSURE

TUBE

R

ING

i

@

Diagram

21

GASKETS

1q

LOW PRESSURE

TUBE

206J

|

6

7.1

Pilot

wilt

not tight

CAUSE

Operating

instructions

not

correctly

carried

out. _

Gas

inlet prcssure

inadcquatc/restricted.

Air

in

gas

linc.

Pilot

supply

blocked.

(a)

Remove pilot

injector

and

press

on I knob,

gas

flows

freely.

(b)

No

gas

when

on

I

tnob

is

pressed-

Gas

supply

to

pilor,

but

pilor

will

not

lighr.

_-

Spark

at elecrrode,

but

pilot

srill nor

lighting.

No

spark

at electrode.

7.2

Pilot

will

not

stay

alight

when

Control

CAUSE

Thermocouple

has

faulty

contact

at

main gas

conrrol

unit.

Faulty

electro-magnet

unit.

Outcr

case

serl inelfectivc.

7.3

Main

Gas

will

not

light

when

Hot

CAUSE

REMEDY

Follow lightjng

instructions conectly.

Check all

gas

cocks

arc open

and

gas

line

is unrestricted.

Purge

out

air.

Clean

injector.

Clean

pilot

filtcr

and

gas

ways.

Check

there

is

a

spark ar

elecrode by

placing

an

eanhed screwdriver 2mm

away from eiecuode

and

pressing

conrrol knob.

Check

correct

gap

between

pilot

and

elecrrode,

see

diagram 13.

(a)

Check ignition

lead for

shorting our.

renew if

defective.

(b)

Renew faulty

piezo

unir.

Knob

is released.

REMEDY

Pilor

flame

not

impinging

on thermocouple.

Check

pilor

is

correctly

posirioned,

see

diagrarn 12.

Renew

pitot

if no

thermocouole

flame evidenr.

Thermocoupie

tip

burnt

away.

Check

for

partial

blockaee and clcrn.
Renew thermocouple.
Check

ftat

thermocouple

conract in main

gas

control

is

tight.

Nore. One

quarter

turn

beyond

finger tight is

adequare.
Renew thermocouple
Renerv unit.
Check

casc fitted

conecrlv.

Chcck seal

is nor

damaeed

and is

searcd correcilv.

Faulty

rirerinocouple

Tap

is opened

REMEDY

Insufficient

warer

flow/inadequate

pressure

(a)

Cistern

supply

(b)

lvlains

supply

(whcn

othcr

cold

warer

draw

off taps

in

use).

Inlct

wa(cr

supply rcsricred

by

stop

cock

Air

lock

in

supply

pipes.

Hcrt

cxchanger

fouled

by

2n6d

1

A

Raise tank

or connccl

to main-s

suppll,

(subject

to watcr

undcrraking

,-crulations).

Connect to cistcrn

supply if hcatj

is availablc

consult

wal.ci

(:ompany

with

rcgard

tc

lorv

prcssure.
Fully opcn all

stop cocks.
Remove air lock.
Dcscale or changc

h,:rt exchangcr.

scalc.

Water filter

blocked.

Venturi

or

high

and

Slou, ignition

valve
Diaphragm damaged.
Valve

spindle sticking.

Throttle inconectly

set.

Main

gasways

or injector

blocked.

7.4 Slow

lgnition

of Main Burner

or

CAUSE

Reduced

gas pressure

at

burner:

sr.iff.

low

pressure

tubes

blocked.

--

not

adiusted correctlv

or blocked.

-

Low

Clean or

change

watcr filtcr.

Check that.

venturi

and

pressure tubes are clear.

Readjust

or clean

as

necessary.

Inspect

and

renew diaphragm

if

necessary.

Check

valve

spindle

is

undamaged,

lubricate

or

renew as necessary.

Check throttle,

resel as

necessary.

Inspect

and

clear any

obsuuction.

Outlet Temperature.

REMEDY

(a)

Gas service

cock

not

fully

open.

(b)

Obstruction

in main

gas \\,ays.

(c)

Reduced inlet

pressure

Insufficient water

flow

(a)

\\/arer

service cock not.

to fully

open

gas valve.

fulli'open

(b)

\\/ater filter

blocked.

(c)

Insufficient pressure

from u,arer

(d)

Heat

exchanger fouled

by

scale.

supply.

Excessive waler

flow

throueh heater.

SIo*, isnition

valve

incorrectly

sct.

_

Diaphragm

defective.

Automaric

gas

spindle

7.5 Main

Burner

Remains

Alight

after Tap is

CAUSE

Automatic

gas

valvc

hcld

opcn by foreign

body.

Diaphraurn

defcctive.

Automatic gas

valvc

spindlc

stiff.

Turn

gas

cock

fully

on.

Inspect for and clear any

obstruction.

Ensure

that

gas

supply

is clear of

any

obstructions

and that

it

is adequate

for the

heater

when

other

gas

appliances

are in

use.

Turn

water

cock fully

on.

Clean

u'ater

filter or

rene\\' as necessary.
See Section7.3.
Descale

or

replace heal exchanger.

Check

waler

flow

rate

through

the

heater.

Reset throttle heater

as necessary,

if

stiff,

examinc throttlc

lor

obstruction.

Clean

and adjust slow

ignition

valvc.

Examine and rcncw diaphragm

as

nccessary.

Examine

spindle,

rcnov

if nccessary.

Lubricate spindlc.

turned

off.

REMEDY

Aul.omatic
Low

and

Ball

sruck

Dcad

lcg

Automa[ic

gas

valvc

spring

u,cak

or damagcd.

high

prcssurc

tubcs blockcd.

in

slow

ignition valvc.

in

wirtcr

supply crcating

an air

lock.

Clcan

gas valvc

scat, chcc:k

nutin

gls l'iltcr.

BIow out

fccd tubcs.

Examinc and rcplircc ils

ncccssilry.

Examinc

spindlc, rcnov

il-

ncccssllr)'.

Lubricatc spintllc.
Rcncw spring.
Rcmovc and blow

through.

Clcln

or

rcncrv

ball.

Rcrnovc dcad

lcg.

In.spcct.

scal

antl rcncrv il'

ncccssary.

gas

valvc

scll

damagcd

17

2064

i 6

2

l

I

6

/

I

/

I

+

,(q.

rE<l

Y

3

\

lt

J,

JI

q

lt

!l

12

/

18

2054

1 6

When

replacement.

parts

are required,

apply

to

your

local

supplier,

quoting

rhe

name

of

the

appliance,

Ascor

1.4S Water

Heater

and

its

serial

number.

Key

No

GC.

No

281

306

281

318

384 266

281

389

281

3tI

28i

313

281

386

281

370

28r

362

28t

363

28t

364

28r

317

Glorv-ryorm

Part

No.

420020

203008

202602

203300

202401

203502

2021M

208018

2c/601

204606

2M60s

ww46l0

I

3

,1

I

5

6

7

8

9

10

11

L2

Front

cover

assembly

Burner

injector

Electrode

Elecro

-

Mag

Thermocouple

Pilot

Injecror

Spark

Igniter

Diaphragm

and

Plare

Igni[er

burton

Startcr

button

Stop

burton

Ignition

lead

asscmbly

asse

mbly

Description

19

206{ I 6

Infonnation

for

the

Installer and Seryice Engineer.

Under

Section

6 of

the

Health

and

Safery

at

Work

Act

7974,

we

are

required tro

provide information

on

substances

bazardous

to

health.

The

adhesives and sealants

used

in this appliance are cured

and

give

no known

hazard

in tiis

state-

GLASS YARN
Can cause

irritation

to skin,

eyes and the

respkatory tract.

If

you

have a history of

skin

complaint

you

may be

susceptible

to

iritation.

High

dust

levels

are

usual

only

if

tbe

material is

broken.

Norrral handling

should

not

cause discomfort,

but

follow

normal

good

hygiene

and

wash

your

hands

before

eating, drinking

or

going

to

the

lavatory.

If

you

do suffer iritation

to

lhe

eyes or severe irrihtion

to

the skin

seek

medical

attention.

Because

of our constant

endeavour

for

improvement

details may

yary

slightly

from

tkose

in

the inslruci;ons.

206416 20

Glow-worrn

206417

t6t87

,,U-ger

Instructions

,

t"

Keep

for

f uture reference

!

E:s,

ASCOT

1.45

Instantaneous

Multipoint
Balanced

Flue

Water Heater

INTRODUCTION
Thi5

is a moCern

room sealeC

instanraneors water

heaier

designed to

supply

hot

water

ro

several taps

*hich

may

be

situated in

di

fferent.co:rs.

IMPORTANT
ENSURE THAT ALL

HOT'il/ATER

TAPS

ARE

TURNED OFF BEFORE L]GHTINC

THE PILOT.

IF

PILOT BLOWS OLN

WAIT

THREE NflNUTES THEN

CARRY OLTT LICHTING PROCEDURE

AGAIN.

The

pilot

is

lit

by

a

piezo

spark

batteries or

electricity

are requireC.

burners

will

automatically

light

wfren

ap is turned

on

and

go

out

when

the

off.

rSnr ter, no

The

main

a

hot water

tep

is turned

This

heater

is not

suitable for

use':'irh

a swivel

s

po

ut.

GAs SAFETY

In

your

own interest

and that

cf safety

it is

law

that all

gas

appliances are installeC

b)' competent

persons

in

accordance with

the

curreni issue

of

the

Cas

Safety

(lrstallation

&

Use)

regu!ariors.

Failtre

to

install

appliances

correctly

ccdd leaC

to

prosecuti

on.

If a gas

leal<

or fault

exists, or is sispecteC,

turn

the

heater

off

anC consul t the

lccai

region

of

British

Gas

or

yow

instatlation/servicinE

.orn"puny.

TO

LICHT

TFIE

PILOT

Ersure that the

rnai

e gas

suplJl

y

is

twne/

on,

Tr.rn

of { all

llO'f uater

\taps.

Ful!y

depress

the

'gas

on'

button

markeC

Q

'anC

press

anC

release

the spark igpiter

l-\utton

mari<ed

){

ilr'ril

the

pilot

is lit,

see

diagrarr,

l.

The pilot

may

!:e

observcC

througlt

the

pilot

vieu'inJ'

rvinCorv.

Keep

the

'gas

on' button

fully

presseC

in for l0

seconCs aiter

the

pilot

has been

lit and then release. lf

t:re

pilot

goes

otJt

repeat

the operation.

TO OBTAIN HOT

WATER

Once the pilot is

al

ight the main

burner

t'il!

be

lit

by

turning

on any

of

the

hot water taps.

TO TURN

OFF TF{E FIEATER

If

the

heater

is

not req.rireC Ior

shorr

perioCs

the

pilot

may

be

left

atight._ For lcnger

perio6

press

tne OfF

button mar*Jaf.

Cas sup"pl y io bott

'pitot

and main

burner

will

no\r'be

shut off.

Check

through

the viewing

rvindorv

that

the

pilot

flame

is

exti ngui she

d.

SUMMER-MNTER

SWTTCH

T'e

summer-winter

swi tch reduces the ef fect of

. sonal variation in

water

supply temperatLne,

so

tfrat in winter

and

surnmer

hot

\r'ater

at

a similar

temperatwe is

obtained.

Tle summer-winter swi

tch

should

be

tirned tc the

summer

posi tion

in the

u'arrn

summer arC

auturnn

months

and to the

winter positicn

in the colC

winter

and spring

months. Tfrere

is

no

aCmntage

in treq.rent

adj

tstment

of the s'*i tch as

ille water

supply

temjxrature

varies

slo\,ly

through

tie year.

II

irstatled in a hard

water

area

correst

se of

the

summer-winter

switch

will

reduce the risk of

scaling.

NOTE:

5houl d the

water

flow

through t::e

heater

be

greater

than

normal, either

by

option

or

because

of

supply

pressure variation.

cooler

hot

*ater

will

be obtained

and

the

summer-u'inter s'i'itch

will

have

no eifect.

ReCuction

of

u'ater flcu'

at the

tap

will

restore the

te:'nperature

anC

tl',e

ection of

the

summer-g'inter

switch.

--
EANINC

THE

HEATER

The

heater

casing

shoulC

be cl

eanec.\-i in warrn,

soapy

water.

DO

NOT

USE ABRASIVE

PC\I;DERS

5li.'CE

THEY

\I,'tLL

SCRATCH

TiiE

9.\tNTE.t)

S LR.FA

CE.

The heater

contains

metal

parts

and

care should

be

taken

when

hanCling

and

cleaning, u.ith particular

reg3rd

to

edges.

G

low-worm

Ltd

Nottingham

Road. Belper,

Derby

DEs

1JT

Telephone Belper

(077

382)

4141

3

Telex

37586

MAINTENANCE
To

obtain a

long life, efficient, safe and

trouble

free

service

operation of

the

heater,

it is strongly

recommencled

that

arrangements

are

made

ior

regular irspection

and mai ntenance.

Please

corrsult

the

local resion

of

B ritish Gas or

vow

irs

tallati

on/

s"r ui-ci

ng

com

pan

y.

FR6T

PRECAUTIOT.{

In

frosty

weather

the pilot shou.lC be left aJight.

ll

the

house

is to be

unoccupieC

for severai Cays

the

heater should

be drained.

Tu'n ofi the

gas

and

water

supplies,

see diagram

2.

Cpen

a

hot

tap to

release

the

pressure.

Place

a suitairl

e receptacle l-eneath the water

service

cock

then

takine

care

not

to

lose

the

seai

ing

washer

remove

the Crain scre\\'

to

drain

the

heater.

Refit

drain

screw and sealinq

*asher

then

t'.rn

off hot

tap.

SPARES

PARTS

lf

it

is

CesireC

to

refer

to

the manufactwers

regarCing

spare parts

or any

question

concerning

the

use

of

the heater, the

heater type mtrt

be

quoted,

i.e.

Glou'-u'orm

Ascot

1.45.

Becar.re of

ow constant endeavou'for

improvement

Cetails may vary sl ightly

from those

g.roted

in

these instructiom.

P

ILOT
VIEWING
WINDOW

SU M

MER/
WINTER
CONTROL

O

orr

s

Diagram

1

OFF

POSITION

{TURN

90'FOR ON

POS|ION}

o

WATER SERVTCE

COCK

<r

Diagram

2

$

PSG

Disc

02