Gas Heaters GWH 10-2 G.. / GWH 13-2 G.. / GWH 16-2 G..
| Table of contents Table of contents 1 Key to symbols and safety instructions . . . . . . . 3 1.1 Explanation of symbols . . . . . . . . . . . . . . . . 3 1.2 Safety information . . . . . . . . . . . . . . . . . . . 3 2 Technical Characteristics and Dimensions . . . . . 2.1 General Description . . . . . . . . . . . . . . . . . . 2.2 Explanation of Model Code . . . . . . . . . . . . . 2.3 Package contents . . . . . . . . . . . . . . . . . . . . 2.4 Description of the heater . . . . . . . . . . . . . .
Key to symbols and safety instructions | 3 1 Key to symbols and safety instructions 1.1 Explanation of symbols Warnings Warnings in this document are framed and identified by a warning triangle which is printed on a grey background. Electrical hazards are identified by a lightning symbol surrounded by a warning triangle. Keywords indicate the seriousness of the hazard in terms of the consequences of not following the safety instructions. • NOTICE indicates that material damage may occur.
| Technical Characteristics and Dimensions 2 Technical Characteristics and Dimensions 2.1 General Description • Gas flow adjustment proportional to the water flow to maintain a constant temperature. • Safety devices: Model GWH 10/13/16 -2 G.. Category CONTINUOUS FLOW Type INTERNAL Explanation of Model Code Type l/min Series Ignition Gas Types GWH 10 2 G NG / LP gas GWH 13 2 G NG / LP gas GWH 16 2 G NG / LP gas Table 3 2.
Technical Characteristics and Dimensions | 5 2.5 Dimensions Fig. 1 1 2 3 4 5 6 7 Front cover Opening in rear panel for mounting on the wall Temperature/volume selector Gas adjustment Digital display Switch/LED - Low water pressure indicator LED - Burner status check Dimensions (mm) 8 9 10 11 12 13 14 Gas connection Connection collar for flue Draught diverter Copper Heat exchanger Burner Gas valve Ignition unit H (Ø) A B C D E F G Natural gas LP gas GWH10...
| Technical Characteristics and Dimensions 2.6 Functional diagram of the heater 1 3 2 4 5 32 31 6 30 15 29 7a 28 27 8 33 26 10 25 9 11 24 12 13 23 14 22 16 21 7b 20 Fig. 2 1 2 3 4 5 6 7a 7b 8 9 10 11 12 13 14 15 16 19 18 17 6720608992-05.
Technical Characteristics and Dimensions | 7 2.7 Electrical diagram Fig. 3 1 2 3 4 5 6 7 2.
| Technical Characteristics and Dimensions 2.9 Technical characteristics Technical characteristics Units GWH10 GWH13 GWH16 MJ 79 Natural gas H kPa 1.13 1.13 1.13 LP gas kPa 2.75 2.75 2.75 12 14 18 kPa 1000 1000 1000 °C 50 50 50 l/min 2.2 - 4.6 2.2 - 6.2 2.2 - 8.
Regulations | 9 3 Regulations Any local by-laws and regulations pertaining to installation and use of gas-heated appliances must be observed. This appliance must be installed in accordance with the manufacturers installation instructions, AS5601, NZ5261 and all Local Building & Gas fitting regulations It is recommended that for sanitary fixtures used for the purpose of personal hygiene, that a temperature limitingl device be fitted (such as a tempering valve) as per AS3498.
| Installation 4 Installation DANGER: B Check if the heater corresponds to the type of gas provided. This appliance must not be installed in a bedroom, bathroom, toilet or combined living/sleeping room in accordance with AS5601. B Ensure the flow and pressure through the regulator are appropriate for the consumption of the heater (see technical data in the table 5). DANGER: Explosion Risk 4.2 B Always turn off the gas cock before carrying out any work on components which carry gas.
Installation | 11 Ventilation requirements as per AS5601. CAUTION: Never support the gas heater on the water or gas connections. Combustion gases Use single or twin skin flue in accordance with AS5601. 4.4 DANGER: Make sure that all flue connections are sealed. B Identify the cold water pipe (Fig. 5, item A) and the hot water pipe (Fig. 5, item B), so as to avoid any possible cross-connection. B Fit the flue pipe with an approved flue cowl.
| Installation 4.6 Pressure Relief The pressure relief (Fig. 2, pos. 33) will release pressure from the system whenever the value exceeds 1500 kPa. 4.7 Gas connection DANGER: If local regulations are not followed, a fire or explosion could result causing property damage, personal injury, or loss of life. Size gas supply as per AS5601. Incorrect gas pipe sizing will not be covered by the warranty.
Operating instructions | 13 5 Operating instructions Open all water and gas isolation valves. Purge the pipes. 5.3 Turning the heater on and off Turning on B Press the switch , position . CAUTION: The front stainless steel panel in the burner and pilot burner area may reach high temperatures, with risk of burning in case of contact, and must not be removed. 5.1 Digital display - description Fig. 8 Turn Hot Tap on, LED light on = Main burner on Fig. 7 1 2 3 4 5.
| Operating instructions CAUTION: 5.5 The temperature on the display is not precise, always check before bathing children or elderly people. Gas adjustment Lower water temperature. Use less gas. 5.7 Draining the appliance There are two ways to drain the appliance if there is a risk of freezing.
Commissioning | 15 6 Commissioning 6.1 Inlet pressure adjustment B Turn on the heater with the gas selector set to the left (maximum position). DANGER: The following procedures must only be performed by a qualified technician. Burner pressures have been adjusted in the factory, however adjustment may be required upon installation. Attach a manometer to the inlet pressure test point located on the gas inlet pipe. Inlet gas pressure should be adjusted at the appliance regulator to 1.
| Maintenance 7 Maintenance DANGER: Failure to perform maintenance procedures can lead to appliance malfunction, errors, service calls and loss of warranty. To ensure that gas consumption and the environmental load (pollution, etc.) remain as negligible as possible over time, we recommend the appliance be maintained on an annual basis. These jobs can only be done by a Bosch authorised service agent. Maintenance must only be performed by a qualified technician.
Problems | 17 8 Problems 8.1 Problem/cause/solution Assembly, maintenance and repairs must be performed by qualified technicians only. The following chart offers solutions to possible problems. Problem Cause Solution The heater does not ignite and digital display is turned off. Switch turned off. Check switch position. Slow and difficult ignition of the burner. Reduced water flow. Call a qualified technician. Red LED in switch flashes. Reduced water flow. Call a qualified technician.
| Problems Problem Cause Solution Digital display shows “EA”. There is spark but the main burner does not ignite, heater blocked.No ionisation probe signal . Check: Digital display shows “F0”. Power was activated with a hot water tap running. Turn the water off and on. If the problem persists, call a qualified technician. Reduced water flow. Insufficient water supply pressure. Call a qualified technician. Dirty taps or mixers. Call a qualified technician Gas valve blocked.
Environmental protection | 19 9 Environmental protection Environmental protection is a basic company strategy of Bosch. The quality of our products, profitability and environmental protection are equal-ranking goals for us. Laws and regulations concerning environmental protection are strictly observed. We use the best possible technology and materials, under economic considerations, to protect the environment.
| Water quality 10 Water quality All Bosch water heating appliances are constructed from high quality materials and components and all are certified for compliance with relevant parts of Australian and New Zealand gas, electrical and water standards. Whilst Bosch water heaters are warranted against defects, the warranty is conditional upon correct installation and use, in accordance with detailed instructions provided with the heater.
Warranty details | 21 11 Warranty details Robert Bosch (Australia) Pty Ltd (Bosch) Manufacturer's Warranty (Applicable for purchases from 1 January 2012) All Bosch hot water units are carefully checked, tested and subject to stringent quality controls. 1.
| Warranty details Australia or New Zealand. (g) To the extent that any condition or warranty implied by law is excludable, such condition or warranty is excluded. 5. How to lodge a warranty claim and warranty procedure (a) Warranty claims must be made with the Bosch Customer Contact Centre (Australia: ph 1300 307 037; New Zealand: ph 0800 543 352). Please be ready to provide the model and serial numbers, date of installation, purchase details and a full description of the problem.
| 23 Notes 6 720 608 992 (2011/12)
6720608992 Australia Robert Bosch (Australia) Pty Ltd 1555 Centre Rd Clayton, VIC 3168 Phone 1300 30 70 37 Fax 1300 30 70 38 www.bosch.com.au/hotwater New Zealand Phone 0800 4 Bosch or 08 543 352 www.bosch.co.
