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6

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.

NOTE: If the appliance is to be enclosed after the

installation then the instructions given in Section 4, Siting
the Appliance, of the Installation Book MUST be followed. 

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. It is essential that the airing space is
separated from the boiler space by a perforated non-combustible
partition as described in BS 6798.

ROOM THERMOSTAT

A room thermostat must 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 fitted to the system then they

must conform to the requirements of BS2767. 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.

Thermostatically controlled 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

Technical Helpline.

HOT AND COLD FLOW

The flow of water demanded from both hot and cold service

outlets is dependent upon mains supply and 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 as it is connected
to a sealed system.

Service

Left-hand side

10          

25

Right-hand side

10

25

In Front

600

*25

Above flue elbow

30                30  

Below

200

200

CLEARANCES 

Unventilated

compartment

Minimum clearances in millimetres.

*Front clearance is to a removable

panel or door.

Summary of Contents for 24 SERIES

Page 1: ...24i 28i junior USER INSTRUCTIONS CUSTOMER CARE GUIDE G C NUMBERS APPLIANCE NATURAL GAS L P G 24i junior 47 311 69 47 311 71 28i junior 47 311 70 47 311 72 ...

Page 2: ...deed Worcester Heat Systems have led the field in innovative appliance design and performance for more than 30 years The result is that your new Worcester ijunior 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 bac...

Page 3: ...e 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 central heating boilers and system equipment A log book is dispatched with every appliance This is a vital document that needs to be completed by the installer at the time of in...

Page 4: ...he temperature of the radiators at the level set by the adjustment of the Heating Temperature Control If the system no longer requires output to maintain the desired room temperature the burner will extinguish The pump and fan 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...

Page 5: ... system loses pressure it should be re pressurised as instructed by the installer NOTE The set pressure will normally be 1 to 1 5 bar The maximum operating pressure is 2 5 bar 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 ba...

Page 6: ... MIXING VALVES Standard hot and cold taps and mixing valves used with the appliance must be suitable for operating at the available mains pressure Thermostatically controlled 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 syst...

Page 7: ...ne CIRCULATING PUMP This may be fitted with a speed adjuster If so it will be factory set at maximum and should not be changed 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 Heat Systems Technical Helpline will advise you on suitable frost precautions For short periods the built...

Page 8: ... in the winter for example to increase bath water temperature and to remove heavy grease deposits on plates etc Also this will provide an added advantage of reducing the delay before hot water is obtained FACIA MOUNTED PROGRAMMER if fitted Your installer may have mounted either a mechanical or an electronic programmer into the facia of your appliance Operating instructions are supplied with the pr...

Page 9: ...perature control knob System pressure gauge Space for optional plug in programmer INDICATOR LIGHTS Flame detection indicator OFF Burner off ON Burner on Fault indicator FLASHING SLOW Ignition lockout or once per second boiler overheat FLASHING FAST Appliance fault five times a second ...

Page 10: ...acia mounted electronic programmer will retain its settings for about two weeks after which it will return to the factory set programme The time will be saved for approximately 7 hours The display will disappear after approximately 1 hour A facia mounted mechanical programmer will require resetting once the central heating temperature control knob has been set fully anti clockwise past the positio...

Page 11: ...tap OFF and ON Re ignition will be attempted after a delay of four minutes Domestic hot water demands do not have this delay Check that the gas supply has not been interrupted If this condition continues to occur then call a service engineer AIR FLOW DEVICE The appliance will enter a lockout condition in the event of an air flow fault If the controls fail to detect the correct air flow through the...

Page 12: ...e 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...

Page 13: ...hat 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 or in Eire 01 494 0099 for help If you would like to know more about Worcester s extended w...

Page 14: ...1506 441 687 Eire Tel 01 494 0099 OPERATING HOURS Mon Fri 8 00am to 6 00pm Sat 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 14 SERVICE CENTRES ...

Page 15: ...re 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 installat...

Page 16: ...ation Card within 14 days of purchase The card will register you as the owner of your new Worcester i junior 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 RE...

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