Bosch WORCESTER HEATSLAVE 12/14 Bedienungsanleitung

HEATSLAVE

12/14, 15/19, 20/25, 26/32

FLOOR-STANDING OIL-FIRED COMBINATION BOILERS FOR

CENTRAL HEATING AND MAINS-FED DOMESTIC HOT WATER

USER INSTRUCTIONS &

CUSTOMER CARE GUIDE

EXCELLENCE COMES

AS STANDARD

Thank you for purchasing a Danesmoor oil-fired central

heating boiler.

Heatslave oil boilers are made by Worcester Heat Systems and

the strictest quality control standards ever demanded are applied

throughout every stage of production.

Indeed, Worcester Heat Systems have led the field in

innovative boiler design and

performance for more than 30

years.

The result is that your

new Heatslave boiler offers you

the very best of everything –

quality, efficiency, economical

running costs, proven

reliability and value for money.

What’s more, you also

have the assurance of our no-

nonsense 2 year parts and

labour guarantee.

And it’s backed up by

Worcester Care Call – a

complete maintenance scheme to keep your boiler operating at

peak condition and efficiency.

No wonder that more and more people are agreeing that when

it has to be oil, it has to be Heatslave.

Page No.

General Information ....... 3

Your Heatslave system

controls........................... 5

How to operate your

boiler............................... 8

Fault Finding Guide .... 12

Maintenance and

Extended Warranty ..... 13

The Heatslave

Guarantee ..................... 15

CONTENTS

GENERAL

INFORMATION

To ensure you get the very best from your new Worcester

Heatslave oil boiler, please read these notes and instructions

carefully.

The Worcester Heatslave is a combination boiler which

provides mains-fed domestic hot water and full central heating. It

utilises a Heatslave tank and a heat exchanger, which ensure that

whenever a tap is turned on there is an instantaneous output of hot

water.

The boilers control system gives priority to the domestic hot

water supply. This means that during hot water draw-off and

Heatslave tank recovery periods, the total output of the boiler is

directed to the Heatslave tank. If the central heating is switched on

during this period, the circulation of hot water to the radiators will

be temporarily interrupted but will resume as soon as the Heatslave

tank has been recharged to the temperature set on the hot water

control thermostat.

SERIAL NUMBER

Your boiler serial number and model number should always

be quoted in any contact with Worcester Heat Systems. This will

help identify spare parts and also avoid confusion and delays

during any service call-out. You will find these numbers on a label

on top of the electrical control box cover plate, and access can be

gained by removing the top panel of the boiler casing.

FUEL

Your Worcester Heatslave pressure jet boiler is set to burn 28-

second kerosene fuel. Some models can be converted to burn 35-

second gas oil. If this conversion has been made your installer will

inform you.

PLEASE NOTE: Appliances fitted with a low-level discharge

flue MUST NOT be used with 35-second gas oil.

OPEN-FLUED BOILERS

Your installer will create airways (in walls or doors) to ensure

an adequate supply of fresh air to the boiler for combustion. Do not

block these airways, and never hang clothes or other combustible

materials over the boiler or against the flue pipe.

Never place anything on top of the boiler.

ROOM-SEALED BALANCED FLUE

BOILERS

Air for this type of boiler is supplied via the balanced flue

terminal, and no other air supply is required, except for ventilation

if the boiler is installed in a cupboard or compartment.

ELECTRICAL SUPPLY

The mains supply for your Heatslave boiler is 230/240 volts

AC-50Hz. The internal fuse is a 3- amp, 20mm quick-blow fuse.

ELECTRICAL CONNECTION

A mains cable should be connected to a double pole isolator

with a contact separation of 3 mm on all poles and supplying the

appliance and controls only.

Your boiler must be earthed and protected by a 5-amp fuse.

ROUTINE MAINTENANCE

It is essential that your boiler is installed and serviced by a

competent heating engineer, and Worcester Heat Systems will be

pleased to arrange regular servicing and a comprehensive

maintenance contract.

Alternatively, the Oil Firing Technical Association for the

petroleum industry (OFTEC) will gladly advise you of engineers

trained by and registered with OFTEC.

Servicing should be carried out at least once a year for boilers

which burn 28-second kerosene, and twice a year for boilers which

burn 35-second gas oil.

When considering additional controls or fittings for your new

Heatslave hot water and central heating system, please note the

following:

ROOM THERMOSTAT

It is recommended that a mains voltage room thermostat is

fitted, as this will improve your control of room temperatures.

THERMOSTATIC RADIATOR VALVES

Any thermostatic radiator valves fitted to your central heating

system must conform to BS 2767/10.

ADDITIONAL FITTINGS

& CONTROLS

SHOWERS, BIDETS, TAPS AND MIXERS

Any taps and mixers used with your system must be suitable

for operating at mains pressure.

For a shower it is recommended that you fit a

thermostatically-controlled shower valve, as this will give added

safety by protecting against excessive water temperatures.

Mains-fed hot and cold water can be supplied direct to an

over-rim flushing bidet, subject to local water bye laws.

If a loose shower head with a flexible hose is to be used over

the bath, the hose must be fixed so that the head cannot fall closer

than 25mm (1 inch) above the top edge of the bath, so preventing

its immersion in bath water. Alternatively, the shower must

incorporate or be fitted with an anti-syphonage device at the point

of the flexible hose connections.

HOT AND COLD FLOW

The flow of water from your hot and cold taps depends on the

mains water pressure, and in some homes it might not be possible

to operate several taps simultaneously. To ensure an even

distribution of water to all outlets in the home, you can fit

individual flow regulators to the supply pipes.

USER OPERATING SWITCH

Your boiler facia panel is supplied with a user operating

switch as standard, although this may have been replaced with the

optional facia mounted electronic programmer or a remote

programmer.

If ‘HOT WATER’ only is selected

The boiler will keep the Heatslave tank at the temperature set

on the hot water control thermostat.

Whenever a tap or shower is turned on, the burner will ignite

and water will be pumped through the water to water heat

exchanger to provide hot water.

YOUR HEATSLAVE

SYSTEM CONTROLS

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.

NOTE: If the appliance is to be enclosed after the

installation then the instructions given in Section 6, Air

Supply, of the Installation Book MUST be followed.

ROOM THERMOSTAT

A room thermostat may be fitted for control of the central heating

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

of setting a room thermostat varies with the type and manufacture.

Refer to the instructions supplied with the room thermostat.

THERMOSTATIC RADIATOR VALVES

If thermostatic radiator valves are to be fitted to the system then

they must conform to the requirements of BS2767:1972. It is advisable

to leave one valve permanently set at maximum to prevent the boiler

short cycling.

SHOWERS, BIDETS, TAPS AND MIXING

VALVES

Standard hot and cold taps and mixing valves used with the

appliance must be suitable for operating at mains pressure.

Thermostatically controlled shower valves will guard against the flow

of water at too high a temperature.

If using a pressure equalising valve, set the Domestic Hot Water

temperature control knob to the ‘MAX’ position.

Hot and cold mains fed water can be supplied direct to an

overrim flushing bidet subject to local water company requirements.

With all mains fed systems the flow of water from the individual

taps will vary with the number of outlets operated simultaneously

and the cold water mains supply pressure to the property. Flow

balancing using ‘Ball-o-Fix’ type valves is recommended to avoid an

excessive reduction in flow to individual outlets.

For further information contact Worcester Heat Systems

Technical Helpline.

HOT AND COLD FLOW

If the flow of water demanded from both hot and cold service

outlets is dependent upon mains supply, it may not be possible in

some installations to operate all outlets simultaneously.

WATER MAINS FAILURE

It is important to note that in the event of a mains water supply

failure, no tap water will be available until the mains supply is

restored. The appliance can still be used for heating provided that the

system is of the sealed system type.

RSF

Left-hand side 10

Right-hand side 10

In Front 600

Above the casing 180

Below 200

CLEARANCES

EXTERNAL PROGRAMMER

You may opt to have a programmer sited away from the

boiler, in which case your installer will provide setting and

operating instructions.

CENTRAL HEATING TEMPERATURE

CONTROL

The central heating temperature control knob on the boiler

facia panel enables you to control the temperature of the water in

your radiators. A low temperature is indicated by a single

horizontal bar, and the control knob can be set anywhere between

this and the maximum temperature, which is indicated by five

horizontal bars. (As shown in Fig. 1.)

PLEASE NOTE: The control knob must not be set below the

first indicating bar.

HOT WATER TEMPERATURE CONTROL

The hot water control temperature knob on the boiler facia

panel controls the temperature of the primary hot water stored in

the Heatslave tank. The temperature control settings are as for the

central heating control thermostat

(described above). A high setting will give

higher hot water temperatures and greater

quantities of hot water.

The temperature of your hot water

can also be controlled at the tap by varying

the flow rate; increasing the flow rate will

decrease the temperature, and vice versa.

WARNING. Care should be taken when

washing your hands as the combination of

low water flow rate and a high setting of

the hot water control thermostat can result

in very hot water at the tap.

The control knob has a range of adjustment as

indicated by the symbols.

Fig. 1.

TEMP

Low

Setting

High

Setting

INDICATION LIGHTS

There are two indicator lights on the facia panel — POWER ON

and LOCKOUT.

The POWER ON light shows that there is an electrical power

supply to the electrical control panel. This will remain on at all times

provided there is an external electrical supply and the internal fuse has

not blown.

The LOCKOUT light illuminates if a burner ignition failure

occurs. The burner can be reset after two minutes by pressing the

illuminated lockout reset button located on the burner control box.

PLEASE NOTE: Do not attempt to repeatedly restart the boiler

as persistent lockout indicates a fault and you should consult a service

engineer.

OVERHEAT THERMOSTAT

Your boiler is fitted with a manual reset overheat thermostat. If

the burner fails to operate and the LOCKOUT indicator light is not

illuminated, check the overheat thermostat by pressing the reset

button. The thermostat is located on the underside of the electrical

panel and is accessible by removing the boiler casing front panel. If

the problem continues after pressing the reset button, consult a

service engineer.

If your boiler is being operated for the very first time following

the installation your installer should have commissioned the system

as specified in the Installation Instructions.

HOW TO OPERATE YOUR

BOILER

Fig. 2. Control Facia

Domestic Hot Water Temperature

Control Knob

Overheat Thermostat

Reset Button

Lockout Indicator

Light

Central Heating Temperature

Control Knob

Mains Power Indicator

Light

Optional programmer

location

TO START YOUR BOILER

First ensure that the oil supply is turned on.

Now switch on the mains electricity and turn the hot water

and central heating temperature control knobs to maximum. Set

the user operating switch (or programmer) so that both HEATING

& HOT WATER ARE ON.

The burner should now ignite.

Set the user operating switch (or programmer) to suit your

own requirements, and if a room thermostat is fitted set the desired

temperature.

Similarly, set the hot water and central heating temperature

control knobs to the desired temperature level.

TO SWITCH YOUR BOILER OFF FOR

SHORT PERIODS

Set the programmer to OFF.

TO SWITCH YOUR BOILER OFF FOR

LONG PERIODS

Set the user operating switch (or programmer) to OFF and

switch off the mains electricity at the isolator switch. The facia-

mounted programmer (where fitted) will retain its settings for

about four weeks, after which it will revert to the factory-set

programme, but the display will disappear after approximately

twelve hours.

CENTRAL HEATING SYSTEM

OPERATION

During the first operation of the central heating system, check

that all radiators are heated evenly. If the top of a radiator is at a

lower temperature than the bottom, vent it by releasing air through

the vent screw at the top of each radiator. Your installer should

show you how to carry out this simple procedure, and give you the

special key required to do it.

Should you find any leaks in the system, or find that any

radiator requires excessive venting, ask the installer or a service

engineer to rectify the system.

SEALED SYSTEM OPERATION

If your boiler has been fitted to a sealed primary water system,

a minimum water operating pressure must be maintained. This

minimum pressure is indicated by the pre-set pointer located on

the pressure gauge, which can be viewed by removing the front

panel of the boiler casing.

If the pressure falls below this minimum level, the system

must be re-pressurised using the method described by your

installer.

To ensure that the boiler and system are full of water and

pressurised, check the pressure gauge indicator needle. Consult

your installer or service engineer if the system continues to lose

pressure, as this could indicate a leak.

MAINS SERVICE INTERRUPTIONS

In the event of mains water supply failure, no hot water will

be available from the boiler. However, the central heating system

will continue to operate.

If the electricity supply fails, the boiler will not operate. When

the supply is restored, the boiler will return to normal operation,

but you should check that the programmer has maintained your

required settings.

It is essential that your boiler is serviced by a competent

engineer, as previously described on page 4. These notes will also

be helpful in maintaining your boiler‘s efficiency and performance.

CLEANING

Use a damp cloth and a small amount of detergent to clean the

boiler casing. Never use abrasive cleaners.

FROST PRECAUTIONS

To protect your central heating system from freezing, your

installer may have fitted a mains voltage frost thermostat. If so,

your boiler should only be switched OFF at the user operating

switch (or programmer), otherwise the burner will not operate

when there is a demand via the frost thermostat.

If your boiler has not been fitted with a frost thermostat and is

not to be used during a long period of cold weather, the boiler and

the system should be drained to prevent freezing. If your boiler is

not to be used during short periods of cold weather, leave it on a

low temperature setting.

LOOKING AFTER YOUR

BOILER AND SYSTEM

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