Worcester Danesmoor 12/14 Manuale utente

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

Vote for your

‘Installer of the year’ at

www.worcester-bosch.co.uk

EXCELLENCE COMES

AS STANDARD

Thank you for purchasing a Heatslave oil-fired central heating

boiler.

Heatslave oil boilers are made by Worcester and the strictest

quality control standards ever demanded are applied throughout

every stage of production.

Indeed, Worcester, part

of the Bosch Group have led

the field in innovative boiler

design and performance for

more than 40 years.

The result is that

your new Heatslave boiler

offers you the very best of

everything – quality, efficien-

cy, economical running costs,

proven reliability and value

for money.

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

nonsense 1 year parts and labour guarantee.

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 care-

fully.

The Worcester Heatslave is a combination boiler which pro-

vides 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. 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 elec-

trical control box cover plate, and access can be gained by remov-

ing 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 com-

bustible 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 ter-

minal, 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 will be pleased to

arrange regular servicing and a comprehensive maintenance con-

tract.

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 thermostatical-

ly-controlled shower valve, as this will give added safety by pro-

tecting 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 incor-

porate 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 pos-

sible to operate several taps simultaneously. To ensure an even dis-

tribution 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 pro-

grammer.

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

If ‘HEATING’ and ‘HOT WATER’ are

selected together

The central heating will operate in response to any system

controls, and hot water will be supplied when a tap or shower is

turned on. The Heatslave tank will be kept at the pre-set tempera-

ture, as in the HOT WATER mode.

If ‘OFF’ is Selected

Your central heating and hot water will remain off unless

there is a demand via a frost thermostat (where fitted), in which

case the boiler pump, diverter valve and burner will be activated

until the demand is satisfied. The burner will remain inoperative

in all other circumstances.

If a demand for hot water is made at a tap or shower, primary

water will be pumped from the Heatslave tank through the hot

water heat exchanger. This will provide a limited supply of hot

water, the output depending on the amount of heat stored in the

Heatslave tank. This function could prove useful during periods

when it might be undesirable or uneconomical to keep the

Heatslave tank constantly hot, but when there might be a demand

for small quantities of hot water, such as for hand washing. Such

periods could include overnight and the summer months, when

the demand for hot water is lowest.

In these circumstances the Heatslave tank can be charged up

to maximum temperature once or twice a day as required, with the

programmer in the HOT WATER mode and the hot water control

thermostat set to maximum.

OPTIONAL PROGRAMMER

Where a Worcester facia mounted programmer has been fitted

to your appliance the additional “Heating” only setting is available.

Full installation and operation instructions are included with the

programmer kit.

If ‘HEATING’ only is selected

The boiler will operate as a conventional oil-fired boiler, giv-

ing output to the central heating circuit in response to the system

controls. A demand for hot water at a tap or shower will override

the central heating for as long as the hot water is drawn off, allow-

ing any residual heat in the Heatslave tank to be utilised.

The control knob has a range of adjustment as indi-

cated by the symbols.

Fig. 1.

TEMP

Low

Setting

High

Setting

EXTERNAL PROGRAMMER

You may opt to have a programmer sited away from the boil-

er, 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 horizon-

tal bar, and the control knob can be set anywhere between this

and the maximum temperature, which is indicated by five hori-

zontal 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 set-

ting 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.

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 serv-

ice 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 but-

ton. 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 pro-

gramme, 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 radi-

ator requires excessive venting, ask the installer or a service engi-

neer to rectify the system.

SEALED SYSTEM OPERATION

If your boiler has been fitted to a sealed primary water sys-

tem, 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 engi-

neer, 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 boil-

er 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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