Bosch Electronic with tempature selector Operating instructions

HIGHFLOW 400 ELECTRONIC
SERIES
APPLIANCE
Fanned Flue (RSF)
Balanced Flue (BF)
Open Flue (OF)
G.C. NUMBERS
NATURAL GAS
L.P.G.
47 311 61
47 311 64
47 311 62
47 311 63
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
EXCELLENCE COMES
AS STANDARD
Thank you for purchasing a Highflow 400 Electronic
gas-fired combination appliance.
Highflow 400 Electronic Series appliances are made by
Worcester Heat Systems and the strictest quality control standards are demanded throughout every stage of production.
Indeed, Worcester Heat Systems have led the field in innovative appliance design and performance for more than 30
years.
The result is that
your new Highflow 400
Electronic appliance 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 1
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 is gas, it has to be Worcester Highflow 400 Electronic
Series.
CONTENTS
Page No.
Operating Instructions
.................................... 3-11
Fault and Breakdowns 12
Maintenance and
Extended Warranty
Information ............ 13-14
Guarantee Details .. 15-16
2
GENERAL
INFORMATION
GAS SAFETY (INSTALLATION AND USE)
REGULATIONS 1998
It is the law 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
manufacturers notes must not be taken, in any way, as over-riding
statutory obligations.
WARNING: This appliance must be earthed and protected by a
3 amp fuse.
ELECTRICITY SUPPLY: 230V ~ 50Hz
IMPORTANT: To get the best from your Highflow please read
these instructions carefully.
NOTE: In the event of a fault the appliance should not be used
until the fault has been corrected by a competent person.
GENERAL DESCRIPTION
(See Fig.1.)
The HIGHFLOW 400 ELECTRONIC MODELS are combined
domestic hot water and central heating appliances. They consist of a
gas fired boiler having a varying output of between 8.8/11 kW and 24
kW, a heatbank containing stored primary water, a heat-exchanger to
provide domestic hot water via the boiler, a circulating pump, water
diverting valve and all necessary controls to provide central heating
and mains fed domestic hot water and central heating.
The hot water delivery rate is limited to 18 l/m. The specific
rate, declared as part of the relevant standard, is 20 l/m. To achieve
this a tank temperature of 75°C is required.
The appliances can operate in one of three modes. Hot water
only or hot water and central heating or heating only.
Hot Water Mode:
When a demand is made for hot water by opening a tap or shower hot water will be delivered almost immediately. The flow turbine
will energise the pump and circulate primary hot water around the
boiler and water to water heat exchanger. The burner will light to
maintain the temperature of the heatbank.
When hot water is no longer required the appliance will continue to operate, the burner will cycle a number of times, until the heatbank has returned to temperature. The pump will continue to run for
a few minutes to dissipate the residual heat around the appliance.
If no hot water demand is made then the boiler will only use
enough energy to maintain the temperature of the heatbank.
The maximum temperature of the water drawn off from the
heatbank is governed by the setting of the Hot Water Temperature
Control. (See Fig.2.)
A flow restrictor is fitted within the appliance which limits a hot
water delivery rate to a maximum of 18 (±15%) litres/minute.
The restrictor is removed by the installer if a cistern feed hot
water system is installed.
3
Hot Water and Central Heating Mode:
The appliance will supply heat to the central heating system as
required. A demand for hot water at a tap or shower will override the
central heating function for the period of the domestic hot water
demand.
When domestic hot water is no longer required the burner and
pump will continue to operate until the heatbank is back to the
required temperature.
The appliance will then return to the central heating state and
its normal mode of operation.
Similarly the hot water is occasionally diverted from the central
heating system into the heatbank to maintain the stored primary hot
water temperature.
NOTE: If in doubt about the use of the controls ask your
installer to assist you.
Central Heating Mode:
When a demand is made for heating by the system controls (i.e.
a programmer or room thermostat).
The water diverter valve will open, the pump will energise circulating primary water around the heating system and the burner will
light. The appliance will operate as necessary to maintain the temperature of the radiators at the level set by the adjustment of the Heating
Temperature Control. (See Fig. 2.)
If the system no longer requires heat 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
Fig. 1. System Diagram of Highflow 400 Electronic Series.
the appliance and then switch
off.
From
radiators
To
radiators
Flow turbine
Mains
cold in
Domestic hot
water out
Expansion
vessel
Boiler
Heat
exchanger
Pilot observation window.
Circulating
pump
Water
diverter
valve
Heatbank
Primary
Water
circulation
4
Burner
Slot in
front cover.
(O.F. only)
GENERAL NOTES
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 replenished 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 system corrected.
SEALED HEATING SYSTEM
The appliance can 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 maintained and contact your installer or maintenance engineer 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.
NOTE: Some sealed systems do not require pre-pressurisation. If
this type of system has been used by your installer he will advise you
of any special maintenance that is required to ensure that the system
is always full of water.
Should any water leaks be found in the system or excessive
venting be required from any radiator, a service engineer should be
contacted and the system corrected.
OPEN VENTED HEATING SYSTEM
The appliance may be fitted to an open vented heating system
your installer will advise you. There is no need to check the pressure
gauge.
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.
Left-hand side
Right-hand side
In Front
Above
BF Models
5
5
600
10
OF Models
5
70
600
10
RSF Models
5
5
600
10
5
ROOM THERMOSTAT
A room thermostat may be fitted for control of the central heating temperature. 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 the available mains pressure. The
use of thermostatically controlled or pressure equalising shower valves
will guard against the flow of water at too high a temperature.
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 Ltd.
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. Cistern fed hot water supply will stop once the cistern has
emptied but the appliance can still be used for heating provided that
the system is of the sealed system type. Open vent central heating
systems should be turned off until the supply is restored.
USE IN HARD WATER AREAS
In areas of exceptionally hard water supply it is recommended
that an In-Line scale inhibitor be fitted.
Installation should be strictly in accordance with the requirements of the local Water Company. An isolating valve to facilitate
servicing should be incorporated.
The water hardness may be determined using the standard test
paper or by reference to the local Water Company.
Further information may be obtained from Worcester Heat
Systems Limited.
AIR SUPPLY FOR OPEN FLUED (O.F.)
APPLIANCES
Fresh air is required for combustion
Your installer will have made arrangements for an adequate supply of fresh air to the appliance. Do not block up any air ways which
may be let into a wall or door. Do not hang clothes or other combustible materials over the appliance or against the flue pipe.
6
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. In particular, the flue pipe should not pass
through an airing cupboard space unless protected by a guard (such as
wire mesh) concentrically spaced 25mm, as described in BS
6798:1987.
VENTILATION OF BALANCED FLUED (BF)
AND ROOM SEALED FANNED FLUE (RSF)
APPLIANCES
These are room sealed appliances that do not require air for
combustion from the room. However any ventilation openings in a
wall or door must not be obstructed. Do not allow the flue terminal
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 separated 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 not be re-adjusted.
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. Your British Gas Engineer, or any service engineer will advise
you on suitable frost precautions. For short periods leave the appliance on a low temperature setting.
SERVICE
Annual servicing is important in order to ensure continuing high
efficiency and long life for your appliance. In the event of any difficulty in making suitable servicing arrangements, Worcester Heat
Systems Limited, your British Gas Engineer or other competent persons will discuss regular servicing arrangements 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 British Gas
Engineer or 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.
7
OPERATION OF CONTROLS
The appliance is fitted with a blanking panel or an electronic
programmer on the facia panel for the control of domestic hot water
and central heating.
OPERATING MODES
HOT WATER ONLY. The appliance will operate at any time
there is a demand for hot water. Heating temperature control at OFF
(fully anti-clockwise).
OFF. Both hot water and central heating will remain off when
the heating and hot water temperature controls are at OFF (fully anticlockwise).
HEATING AND HOT WATER. Hot water will be supplied when a
demand is made. Heating and hot water temperature control at OFF
(fully anti-clockwise).
Central heating will operate continuously in response to a
demand from a room thermostat or thermostatic radiator valves if fitted.
HEATING ONLY. Hot water temperature control at OFF (fully
anti-clockwise). The appliance will operate in response to a demand
from a room thermostat or thermostatic radiator valve, if fitted.
ELECTRONIC PROGRAMMER
Your Installer may have mounted the optional electronic programmer on the appliance facia panel. Operating instructions are supplied with the programmer.
TEMPERATURE CONTROLS
The Heating Temperature Control gives control over the temperature of water supplied to the radiators when the boiler is serving the
central heating system. This control does not influence the temperature of the Hot Water which is set by the Hot Water Temperature
Control. The controls have a range as indicated in Fig. 2.
The operating temperatures may be set anywhere within the
range. With a high central heating temperature setting the radiators
will get hotter and high room temperatures will be achievable.
Similarly the temperature of the hot water can be controlled. With
lower settings the radiators and hot water will be cooler but in winter
conditions the central heating and hot water may not reach their
design temperatures.
The temperature controls will shut down the relevant operating
mode when turned fully anti-clockwise.
The Heating Temperature Control is also used to reset any safety
lock-outs by turning it OFF and ON.
WARNING: Do not attempt to adjust any sealed components on
the appliance.
Any interference with sealed components may cause a dangerous condition.
8
Fig. 2. Facia panel.
CH ON Light
Power Light
HW ON Light
Optional Facia Mounted Programmer
OFF
Maximum setting
Minimum setting
Heating Temperature Control
Hot Water Temperature Control
9
TO LIGHT AND STOP THE
APPLIANCE
TO LIGHT THE APPLIANCE
See Figs 2 and 3.
Set the temperature controls A,B (or programmer C if fitted) to
OFF. Switch off the electricity supply. Remove the cabinet front panel
by lifting off its mountings. Turn the gas service cock D on. Check
that the red needle on the pressure gauge is not below the required
pressure (sealed systems only) usually 1-1.5 bar.
Switch on the mains electricity indicated by the Power light E.
Turn the heating temperature control B to max. Set each channel
of the programmer C (if fitted) to ON and the burner will light (not
visible).
Set the programmer (if fitted) to the required position.
Set the temperature controls to the desired settings.
Set the room thermostat, if fitted, to the desired temperature.
Set the central heating temperature control B to the required position.
TO STOP THE APPLIANCE
Fig. 3. Appliance with cabinet front cover removed
C
E F
A
G
B
Circulating
pump
Water
diverter
valve
Gas service cock D
10
Expansion
vessel
Heatbank
Pressure
gauge
For Short Periods; Set the temperature controls (or programmer) to OFF
as indicated by the Demand lights F,G
going out.
For Long Periods; Set the temperature controls (or programmer) to OFF
as indicated by the Demand light
going out. Switch off the mains electricity indicated by the Power light E
going out.
The facia mounted programmer
will retain its settings for about 4
weeks after which it will return to the
factory set programme. The display
will disappear after approx. 12 hours.
ELECTRICITY SUPPLY
FAILURE
The appliance will not operate
without an electricity supply. Normal
operation of the appliance will resume
after the electricity supply is restored.
OVERHEAT THERMOSTATS
Overheat thermostats are fitted to the appliance which interrupt
the electricity supply to the gas control through the control circuits in
the event of overheating.
If the appliance fails to light, check that an overheat thermostat
has not operated by observing the status of the indicator lights on the
facia.
If the CH and HW lights flash slowly then turn the Heating
Temperature Control fully anti-clockwise and then back to its set position to re-set the thermostat.
If the overheat thermostat stops the appliance again call a service engineer.
If the CH and HW lights flash alternately then this indicates a
fault of a more complex nature that can only be rectified by a service
engineer.
NOTE: If the electrical supply to the appliance is interrupted at
the isolation switch or a power failure occurs whilst the burner is firing, the boiler will normally relight automatically when the power
supply is restored. However, depending upon circumstances it may be
necessary to turn the Heating Temperature control OFF and ON
before the appliance will operate.
IGNITION LOCK-OUT AND SAFETY START
(RSF)
If the burner fails to light then lock-out will occur and will
be indicated by CH light flashing slowly. The ignition sequence can
be re-started by turning the Heating Temperature Control fully
ant-clockwise and then back to its set position.
If the lock-out occurs again then call a service engineer.
FLUE SPILLAGE DEVICE (O.F. ONLY)
The appliance is fitted with a device which detects the spillage
of combustion products from the draught diverter. In the event of the
flue becoming wholly or partially blocked this device will cut the gas
supply to the burner indicated by the CH and HW lights flashing
fast. The device automatically resets after a waiting period of approximately 10 to 15 minutes. If the blockage remains the appliance will
relight briefly before the device operates again. Should the problem
persist consult your service engineer.
11
APPLIANCE FAILS TO
OPERATE
More than 30% of all calls made to Worcester Heat Systems to
report appliance faults or breakdowns prove to be false alarms, as there
is often a simple explanation for the apparent malfunction.
So, to help you save time and money – not to mention frustration
and inconvenience – please refer to the General Information, Notes and
Lighting Instructions ensuring all controls are set correctly.
If, after following the instructions the appliance still fails to operate correctly call your local Worcester Heat Systems Service Centre.
Arrangements will be made for an engineer to call as soon as possible.
CALL-OUT CHARGES
All of our field service engineers are factory trained.
If you request a visit from an engineer and your appliance has
been installed within the last 12 months, no charge will be made for
parts and/or labour, providing:
• The appliance was commissioned correctly on installation.
• An appliance fault is found and the appliance has been
installed within the past 12 months.
A call-out charge will be made where:
• The appliance has been installed for over 12 months, or
• Our Field Service Engineer finds no fault with the appliance
(see note), or
• The cause of breakdown is with other parts of your plumbing/heating system, or with equipment not supplied by Worcester.
NOTE: Invoices for attendance and/or repair work carried out on
your appliance by any third party will not be accepted.
12
MAINTAINING YOUR
APPLIANCE
Your new Worcester Highflow 400 Electronic gas-fired appliance represents a long-term investment in a reliable, high quality product.
In order to realise its maximum working life, and to ensure
it continues to operate at peak efficiency and performance, it is
essential that your boiler receives regular, competent servicing
and annual maintenance checks beyond the initial 12 month
guarantee period.
Regular service contracts can be arranged with your
installer - however if you have difficulty making a satisfactory
arrangement simply contact Worcester Heat Systems on
08457 256206 for help.
If you would like to know more about Worcester’s extended warranty options please tick the appropriate box on your
warranty registration card.
13
SERVICE CENTRES
CONTACT NUMBERS:
UK Call Centre
UK Call Centre
Scotland only
Tel.
Fax.
Fax.
08457 256 206
01905 757536
01506 441 687
OPERATING HOURS:
Mon - Fri
Sat
8.00am to 6.00pm
8.30am to 1.00pm
Please contact our UK Call Centre number where our friendly operators
will book your call with one of our team of nationwide engineers.
NOTE:
Sunday and Bank Holiday cover is not available
IMPORTANT
Do not touch or adjust any sealed component
14
YOUR WORCESTER
HIGHFLOW 400 ELECTRONIC
SERIES GUARANTEE
This appliance is guaranteed against faulty materials or
workmanship for a period of twelve calendar months from the
date of installation subject to the following conditions and
exceptions.
1. That during the currency of this
guarantee any components of the
unit which are proved to be faulty
or defective in manufacture will be
exchanged or repaired free of material charges and free of labour
charges by Worcester Heat Systems
Limited or British Gas.
2. That the householder may be asked
to prove the date of installation,
that the appliance was correctly
commissioned and, where appropriate, the first 12 month service has
been carried out to the satisfaction
of Worcester Heat Systems Limited
when requested.
3. That any product or part thereof
returned for servicing under the
guarantee must be accompanied by
a claim stating the Model, Serial
Number, Date of Installation.
4. That Worcester Heat Systems
Limited will not accept responsibility for damage caused by faulty
installation, neglect, misuse or accidental damage, the non-observance
of the instructions contained in the
installation and Operating
Instructions Leaflets.
5. That the appliance has been used
only for normal domestic purposes
for which it was designed.
6. That this guarantee applies only to
equipment purchased and used in
mainland Great Britain.
This guarantee is given in addition to all your normal statutory rights.
15
GUARANTEE
REGISTRATION
You should complete and return the postpaid Guarantee
Registration Card within 14 days of purchase.
The card will register you as the owner of your new
Worcester Highflow 400 Electronic appliance and, while this will
not affect your statutory rights in any way, it will assist us to
maintain an effective and efficient customer service by establishing a reference and permanent record for your boiler.
IMPORTANT: SERIAL NUMBER. Copy the number off the
Guarantee Card.
FOR YOUR OWN RECORD
MODEL
SERIAL NUMBER
(See identity label inside appliance casing)
TYPE/SIZE
DATE OF INSTALLATION
CORGI CONTACT
All CORGI Registered installers carry a CORGI ID card and
have a registration number. Both should be recorded in your
central heating log book. You can check your installer is
CORGI Registered by calling CORGI on 01256 372300
EXCELLENCE COMES AS STANDARD
Worcester Heat Systems Limited. Cotswold Way, Warndon, Worcester WR4 9SW.
Telephone: (01905) 754624. Fax: (01905) 754619.
Technical Service Helpline 08705 266241.
www.worcester-bosch.co.uk
8 716 115 020a (05/08)