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Summary of Contents for Worcester ZWB 7-25 HE combi
- Page 1 Users Instructions and Customer Care Guide Greenstar HE combi Condensing boiler Greenstar HE system Condensing boiler 6 720 610 577-00.10 ZWB 7-25 HE combi GC-Number: 47 311 73 ZWB 7-30 HE combi GC-Number: 47 311 74 ZB 7-28 HE system...
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Page 2: Table Of Contents
Contents Contents Excellence comes as standard Safety precautions General notes Controls Operating the Appliance Preparation Switching the Appliance On/Off Switching on the Central Heating Controlling Central Heating Combination Boilers: Setting the Hot Water Temperature Summer Mode, Hot Water Only (Combi Appliances) Frost protection (Combi Appliances) Fault Condition Tips on saving energy... -
Page 3: Excellence Comes As Standard
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 mainte- nance scheme to keep your boiler operating at peak condition and efficiency. -
Page 4: Safety Precautions
Safety precautions Safety precautions Gas Safety (Installation and Use) Regulations 1998 It is the law that all gas appliances are installed by a competent person in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution. It is in your inter- est, and that of safety, to ensure compliance with the law. -
Page 5: General Notes
General notes Combustible materials B Do not store or use any combustible materials (paper, thin- ners, paints etc.) in the vicinity of the appliance. Health and safety B This appliance contains no asbestos products. B There is no potential hazard due to the appliance being electri- cally unsafe. - Page 6 General notes done. 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 is required then a service engineer must be contacted to inspect the installation and rectify any fault.
- Page 7 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 Techni- cal Services Department. Hot and cold flow – Combination Boilers...
- Page 8 General notes Use in hard water areas – Combination Boilers In exceptionally hard water areas a device to prevent scale forma- tion may be fitted. Installation of a scale inhibitor assembly should be in accordance with the requirements of the local water com- pany.
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Page 9: Controls
Controls Controls 317 366 367 6 720 610 577-01.1O System Pressure gauge Reset button Master switch Central heating temperature control Service valves in CH flow and return Hot water Gas isolation valve (open) Cold water inlet Identification sticker Hot water temperature control (combi) Display Indicator lamp for “burner on”... -
Page 10: Operating The Appliance
Operating the Appliance Operating the Appliance Preparation Turn on the gas cock (172). B Press in the handle and turn it anti-clockwise as far as the stop (when handle is in line with direction of flow, the cock is open). Central heating system valves (170) B Using a spanner, turn square nut until groove is in line with direction of flow (see detail). - Page 11 Operating the Appliance Check the central heating system pressure B The pointer on the pressure gauge (8.1) should be about 1 bar. B If the pointer is below 1 bar (when the system is cold), top up the system with water until the pointer is 1 bar. Your installer will have shown you how to do this.
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Page 12: Switching The Appliance On/Off
Operating the Appliance Switching the Appliance On/Off Switching on B Switch on the appliance at the master switch (I). The indicator lamp shows green and the display will show the central heating flow temperature, when the appliance is oper- ating in the central heating mode. 6 720 610 333-04.1O If the display alternates between -II- and the cen- tral heating flow temperature, the trap filling pro-... -
Page 13: Switching On The Central Heating
Operating the Appliance Switching on the Central Heating B Turn the central heating temperature control to the desired level: – “Min” setting: 35˚C – Low-temperature heating: setting “E” (approx. 75˚C) – “Max” setting: 88˚C When the burner is lit, the red indicator lamp is illuminated. 6 720 610 333-05.1O Controlling Central Heating B Set the timer to the correct time. -
Page 14: Combination Boilers: Setting The Hot Water Temperature
Operating the Appliance Combination Boilers: Setting the Hot Water Temperature Hot water temperature On combi models, the hot water temperature can be set to between approx. 40˚C and 60˚C using the temperature control The domestic hot water temperature is not shown on the display. 6 720 610 333-07.1O Control Setting Water Temperature... -
Page 15: Summer Mode, Hot Water Only (Combi Appliances)
Operating the Appliance ECO mode with demand detection, button is lit The demand detection function enables maximum gas and water economy. Briefly turning a hot water tap on and then off again signals demand to the appliance which then heats up the water to the set temperature. -
Page 16: Fault Condition
Operating the Appliance Fault Condition In the unlikely event of a fault occuring while the appliance is in operation: The display then shows a fault code and the button may also flash. If the button flashes: B Press and hold the button until the display shows “–... -
Page 17: Tips On Saving Energy
Tips on saving energy Tips on saving energy Heating economically The boiler is designed to provide a high level of comfort while keeping gas consumption and the resulting environmental effect as low as possible. The gas supply to the burner is controlled according to the level of demand for heat. -
Page 18: General Information
General Information Hot water A lower setting on the hot water temperature control can result in considerable energy savings. For combi appliances: The on-demand activation using the ECO-button makes possi- ble the maximum savings of gas and water. Now you know how to heat your home economically with the Greenstar gas condensing boiler. -
Page 19: Maintaining Your Appliance
Worcester Heat Systems on 08705 256206 for help. If you would like to know more about Worcester’s extended war- ranty options please tick the appropriate box on your warranty reg- istration card. -
Page 20: Fault Or Breakdown
Fault or breakdown Fault or breakdown This product is supported in the UK by Worcester Heat Systems Ltd. – part of the Bosch Group. A specialist factory trained field SERVICE ENGINEER is available to attend a breakdown or manufacturing fault occuring on this appliance. -
Page 21: Your Bosch Guarantee
Model, Serial Number, Date of Installation. • That Worcester Heat Systems Limited will not accept respon- sibility for damage caused by faulty installation, neglect, mis- use or accidental damage, the non observance of the instructions contained in the Installation and Users Instructions Leaflets. -
Page 22: Guarantee Registration
You should complete and return the postpaid Guarantee Regis- tration Card within 14 days of purchase. The card will register you as the owner of your new Worcester Greenstar appliance and will assist us in maintaining an effective and efficient customer service by establishing a reference and permanent record for your boiler. - Page 24 EXCELLENCE COMES AS STANDARD Worcester Heat Systems Limited, Cotswold Way, Warndon, Worcester WR4 9SW. Telephone: (01905) 754624 Fax: (01905) 754619...
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