Bosch Worcester 15SBi Bedienungsanleitung

15/24SBi SYSTEM BOILER

USER INSTRUCTIONS &

CUSTOMER CARE GUIDE

IMPORTANT: THIS APPLIANCE IS FOR USE WITH NATURAL GAS OR LPG.

THESE INSTRUCTIONS APPLY IN THE UK ONLY.

THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER OR AT THE GAS METER

G. C. NUMBERS

APPLIANCE NATURAL GAS L. P. G.

15SBi 41 311 43 41 311 45

24SBi 41 311 44 41 311 46

SBi

Worcester supports the

Benchmark code of practice

Vote for your

‘Installer of the year’ at

www.worcester-bosch.co.uk

EXCELLENCE COMES

AS STANDARD

Thank you for purchasing a Worcester SBi gas-fired system

boiler.

The SBi Series appliances are made by Worcester and the

strictest quality control standards are demanded throughout

every stage of production.

Indeed, Worcester, part of the Bosch Group have led the

field in innovative appli-

ance design and perform-

ance for more than 40

years.

The result is

that your new Worcester

system boiler appliance

offers you the very best of

everything - quality, effi-

ciency, economical run-

ning costs, proven reliabil-

ity and value for money.

What’s more, you also have the assurance of our no-

nonsense 1 year parts and labour guarantee.

Page No.

Operating Instructions

.................................... 3-11

Fault and Breakdowns 12

Maintenance and

Extended Warranty

Information ............ 13-14

Guarantee Details .. 15-16

CONTENTS

GENERAL

INFORMATION

GAS SAFETY (INSTALLATION AND USE)

REGULATIONS 1998

It is the law, in GB, that all gas appliances must be installed by a

competent person in accordance with the above regulations. Failure

to install appliances correctly could lead to prosecution. It is in your

interest and that of safety to ensure compliance with the law. The

manufacturer’s notes must not be taken, in any way, as over-riding

statutory obligations.

In GB, a competent person is someone registered with CORGI.

All CORGI registered installers carry a CORGI ID card and have a regis-

tration number. Both should be recorded in the BENCHMARK check-

list. You can check that your installer is CORGI registered by calling

CORGI on 01256 372300.

WARNING: This appliance must be earthed and protected by a

3 amp fuse.

ELECTRICITY SUPPLY: 230V ~ 50Hz

IMPORTANT: To get the best from your Worcester system boiler

please read these instructions carefully.

In the event of a fault the appliance should not be used until the

fault has been corrected by a competent person.

BENCHMARK

The Benchmark initiative is a code of practice to encourage

the correct installation, commissioning and servicing of domestic cen-

tral heating boilers and system equipment.

A checklist can be found in the back of every installation

manual. This is a vital document that needs to be completed by the

installer at the time of installation. It confirms that the boiler has

been installed and commissioned according to the manufacturers

instructions.

In Eire the declaration found in IS 813 must be complet-

ed. Without completion of the checklist and/or declaration, manufac-

turers may refuse to respond to a call-out request. It is important that

the checklist and/or declaration are fully completed by your installer.

GENERAL DESCRIPTION

(See Fig.1.)

The WORCESTER system boilers are sealed system central heat-

ing aplliances. They consist of a gas fired boiler having a varying out-

put of between 6 - 15kW (15SBi) and 15 - 24kW (24SBi), a circulating

pump and all necessary controls to provide central heating.

They can be connected to a domestic hot water supply system

through an optional, internally fitted diverter valve or to an external

S or Y plan system.

Central Heating

When a demand is made for heating by the system con-

trols (i.e. a programmer or room thermostat). The pump will energise

circulating primary water around the heating system and the burner

will light. The heat output from the appliance in this mode has been

factory set to mid-range or as reset by your installer. The appliance

will operate as necessary

to maintain the tempera-

ture of the radiators at

the level set by the adjust-

ment of the Heating

Temperature Control

Knob. (See Fig. 2.)

If the system no

longer requires output to

maintain the desired

room temperature, the

burner will extinguish.

The pump will continue

to run for a short period

to dissipate the residual

heat from the appliance

and then switch off.

The appliance will

supply heat to the central

heating system as

required.

Fig. 1. System Diagram.

Automatic air

vent

Gas to water

heat exchanger

Circulating

pump

Diverter valve

(optional) CH

flow

Domestic

hot water

out

Domestic

cold sup-

ply

return

Relief Valve

discharge

Pressure

relief valve

Boiler

Expansion

vessel

CENTRAL HEATING SYSTEM

During the first few hours of operation of the central heating

system, check that all radiators are being heated at an even rate.

Should the upper area of a radiator be at a lower temperature than

the base of the radiator, it should be vented by releasing air through

the venting screw at the top of each radiator. Make sure your installer

shows you how to carry out the operation. Repeated venting will

reduce the quantity of water in the system and this must be replen-

ished for safe and satisfactory operation of the appliance. Should

water leaks be found in the system or excessive venting be required

from any radiator, a service engineer should be contacted and the sys-

tem corrected.

SEALED HEATING SYSTEM

The appliance must be fitted to a sealed heating

system which is pre-pressurised. In this case your

installer will advise you on the minimum and maximum

pressure that should be indicated on the pressure gauge.

See Fig. 3. Check regularly that this pressure is main-

tained and contact your installer or maintenance engi-

neer if there is a permanent significant drop in pressure

indicated on the gauge. If the system loses pressure it

should be re-pressurised as instructed by the installer

(N.B. Maximum operating pressure 2.5 bar).

Pressurising The System (See Fig. 2).

(If in doubt leave this procedure to your installer).

Remove the bottom panel to gain access to the fill-

ing loop assembly.

Insert the bayonet end of the filling key into the

corresponding cut outs in the filling loop housing and

twist to lock the key in place.

Turn the grey knob anti-clockwise to allow water

ingress and fill until the required pressure is reached.

Turn the grey knob clockwise to stop filling and

remove the filling key by lining up the bayonet end of

the key with the cut outs in the filling loop housing and

withdrawing the key.

N.B. The key must always be removed from the

filling loop housing after the system has been filled to

prevent accidental filling and to comply with Byelaw

14 of the Water Byelaws Scheme.

Store the key in a safe place for future use and

refit the bottom panel

GENERAL NOTES

Grey

Knob

Filling Key

Fig. 2.

CLEARANCES

Your installer will

have provided adequate

space around the appliance

for safety and servicing. Do

not restrict this space by

the addition of cupboards,

shelves etc. close to the

appliance.

Minimum clearances in millimetres.

ROOM THERMOSTAT

A room thermostat may be fitted for control of the central heat-

ing temperature. It will be located in one room of the home. The

method of setting a room thermostat varies with the type and manu-

facture. Refer to the instructions supplied with the room thermostat.

THERMOSTATIC RADIATOR VALVES

If thermostatic radiator valves are fitted to the system then they

must conform to the requirements of BS2767. The radiator located in

the room where the room thermostat is sited must be controlled by a

thermostatic radiator valve.

VENTILATION OF ROOM SEALED FANNED

FLUE (RSF) APPLIANCES

These are room sealed appliances and any ventilation openings

in a wall or door must not be obstructed. Do not allow the flue termi-

nal fitted on the outside wall to become obstructed or damaged.

NOTE: Do not place anything on top of the appliance. If the

appliance is fitted in a compartment do not use the compartment for

storage purposes unless it conforms to the requirements of

BS 6798:1987: Section 6. It is essential that the airing space is separat-

ed from the boiler space by a perforated non-combustible partition as

described in BS 6798:1987.

CIRCULATING PUMP

This may be fitted with a speed adjuster. If so it will be factory

set at maximum and should be adjusted by the installer to suit the

heating load.

15SBi 24SBi

Left-hand side 10 10

Right-hand side 10 10

In Front 600 600

Above 180 180

Below 200 200

FROST PRECAUTIONS

If the appliance is not to be used for a long period of time and

there is a likelihood of freezing, then the appliance should be

drained. The Worcester Technical Helpline will advise you on suit-

able frost precautions.

SERVICE

Annual servicing is important in order to ensure continuing high

efficiency and long life for your appliance. In the event of any diffi-

culty in making suitable servicing arrangements, Worcester personnel

or other competent persons will discuss regular servicing arrange-

ments and offer a comprehensive maintenance contract.

WARNING

If a gas leak exists, or is suspected, turn off the gas supply to the

appliance at the service cock and consult your local service engineer.

Do not touch any electrical switches to turn them either on or off.

Open all windows and doors. Do not smoke. Extinguish all naked

lights.

CLEANING

Do not use abrasive cleaners on the outer casing. Use a damp

cloth and a little detergent.

OPERATION OF CON-

TROLS

(See also label on inside of appliance front panel).

The appliance is fitted with the following controls:

CENTRAL HEATING TEMPERATURE

CONTROL

The position of this knob will determine the temperature of the

water delivered to the radiators between the ‘I’ and ‘MAX’ position.

When the knob is turned anti-clockwise past the ‘I’ position to the

‘OFF’ (Summer Position) the appliance is off.

FACIA MOUNTED PROGRAMMER (if fitted)

Your installer may have mounted a mechanical programmer into

the facia of your appliance. Operating instructions are supplied with

the programmer.

RESET BUTTON

Press and release this button if the appliance fails to operate - if

the appliance still fails to operate then contact Worcester Bosch or

your installer.

Fig. 3. Controls.

Reset

button

Mains electricity

indicator

CH temperature

control knob

System pressure

gauge

INDICATOR LIGHTS

Green light:

MAINS : ‘ON’

TO LIGHT THE APPLIANCE

Check that the water valves to the central heating circuit are

open.

Check that the grey needle on the pressure gauge is not below

the required pressure.

Switch on the mains electricity. Set the room thermostat, if fit-

ted, to maximum. Turn the central heating temperature control knob

to ‘MAX’. The burner will light.. Set the central heating and hot water

temperature control knobs and the room thermostat/cylinder thermo-

stat, if fitted, to the desired temperature.

TO STOP THE APPLIANCE

For Short Periods

Turn the central heating temperature control knob fully anti-

clockwise to the ‘O’ position.

For Long Periods

Turn the CH temperature control

knob switch to the ‘O’ position. Switch

off the mains electricity.

A facia mounted mechanical pro-

grammer will require resetting if mains

supply has been disconnected.

ELECTRICITY SUPPLY

FAILURE

the electricity supply fails the appliance

will not operate. Once the supply is

restored the appliance will return to

normal operation. If a programmer is

fitted, check that the settings have

been maintained.

Fig. 4. 15/24SBi with front panel removed.

Circulating

pump

Clip

Locating peg

Expansion

vessel

Gas valve

TO LIGHT AND STOP THE

APPLIANCE

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