Bosch ZWB28-3A SERIES Operating Instructions Manual
Residential gas condensing boiler
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Also See for ZWB28-3A SERIES:
- Installation and service instructions manual (120 pages) ,
- Installation and service instructions for contractors (64 pages) ,
- Operating instructions manual (48 pages)
Related Manuals for Bosch ZWB28-3A SERIES
Summary of Contents for Bosch ZWB28-3A SERIES
- Page 1 Residential Gas Condensing Boiler Greenstar combi 100 p / 151 p ZWB28-3A... | ZWB42-3A... Operating Instructions...
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Page 2: Table Of Contents
2 | Contents Contents 1 Explanation of symbols and safety instructions ..... . . 4 1.1 Explanation of symbols ........4 1.2 Safety instructions . -
Page 3: Contents
Contents | 3 8 Environmental protection and disposal ......26 9 Quick reference ..........27 6720872363 (2017/04) Greenstar combi 100 p / 151 p... -
Page 4: Explanation Of Symbols And Safety Instructions
4 | Explanation of symbols and safety instructions Explanation of symbols and safety instructions Explanation of symbols Warnings In warnings, signal words at the beginning of a warning are used to indicate the type and seriousness of the ensuing risk if measures for minimizing danger are not taken. The following keywords are defined and can be used in this document: DANGER: DANGER indicates a hazardous situation which, if not avoided, could result in death... -
Page 5: Safety Instructions
Explanation of symbols and safety instructions | 5 Important Information The info symbol indicates important information where there is no risk to people or property. Additional symbols Symbol Explanation ▶ Sequence of steps Cross-reference to another part of the document •... - Page 6 6 | Explanation of symbols and safety instructions ▶ What to do if you smell gas – Do not try to light any appliance. – Do not touch any electrical switch; do not use any phone in your building. – Immediately call your gas supplier from a neighbor’s phone.
- Page 7 Explanation of symbols and safety instructions | 7 ▶ From outside the building, call the gas supply company and a trained and certified installer or service company. HIf you smell flue gas ▶ Switch OFF the appliance ( page 16). ▶...
- Page 8 8 | Explanation of symbols and safety instructions HRisk of scalding ▶ If running at DHW temperatures above 104 °F (40 °C) ask a trained and certified heating contractor to install a tempering valve to prevent scalding. ▶ When the thermal disinfection function is enabled, DHW temperatures above 140 °F (60 °C) can occur.
- Page 9 Explanation of symbols and safety instructions | 9 HInspection and maintenance The operator is responsible for safety and environmental compliance of the heating system. Sign a maintenance and inspection contract with a trained and certified contractor, covering an annual inspection and demand-dependent maintenance. This guarantees high efficiency and environmentally sound combustion.
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Page 10: Information About The Appliance
10 | Information about the appliance HIn case of water damage Do not use this boiler if any part has been under water. Immediately call a trained and certified service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water. -
Page 11: Overview Of Boiler Types
Preparing the appliance for operation | 11 Overview of boiler types ZWB28-3 Greenstar combi 100 p ZWB42-3 Greenstar combi 151 p Table 2 Appliance types Central heating appliance DHW heating Condensing technology Output and DHW output up to 95,500 BTU/hr (28 kW) Output and DHW output up to 143,300 BTU/hr (42 kW) Version Fan-supported appliance... -
Page 12: Topping Up The Heating System Water
12 | Operation 6 720 641 934-04.2O Fig. 1 Topping up the heating system water Topping up the heating system water is different on every system. Therefore, you should ask a trained and certified heating contractor to show you how it is done. Maximum pressure of 30 psi (2.07 bar) at maximum heating water temperature must not be exceeded (safety valve will spill). - Page 13 Operation | 13 Therefore, please read the operating instructions for the heating control unit used. Page 27 contains a quick reference. You can fold this outward and keep these operating instructions in the control panel cover. 6 720 614 235-04.1O Fig.
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Page 14: Overview Of Controls
14 | Operation Overview of controls reset 6 720 641 934-01.3O Fig. 3 Greenstar combi 100 p / 151 p 6720872363 (2017/04) - Page 15 Operation | 15 [1] Emission test button for contractors (see installation instructions) [2] Service button for contractors (see installation instructions) [3] Burner ON indicator lamp [4] ON/OFF switch [5] Key pad lock [6] ECO button [7] Reset button [8] Display [9] Boiler water pressure gauge [10] DHW thermostat [11] Safety relief valve discharge hose...
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Page 16: Switching The Appliance On/Off
16 | Operation Switching the appliance ON/OFF Startup ▶ Switch the appliance ON using the ON/OFF switch. The display shows the supply temperature. Fig. 4 If the display shows in alternation with the supply temperature, the appliance operates at its lowest output for 15 minutes per the initial startup sequence. Shutdown ▶... - Page 17 Operation | 17 ▶ Adjusting the supply temperature with the boiler high limit dial – Radiant floor heating: e.g. setting 3 (approx. 122 °F (50 °C)) – Panel or cast iron radiator heating: setting 6 (approx. 167 °F (75 °C)) –...
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Page 18: Programming The Heating Control Unit
18 | Operation Programming the heating control unit Observe the operating instructions for the heating control unit included in the scope of delivery. There you can read: ▶ How to set the operating mode ▶ How to adjust the room temperature ▶... -
Page 19: Setting Manual Summer Mode
Operation | 19 ECO button Pressing and holding the ECO button until it lights up switches between Comfort mode and Economy mode. • Comfort mode (default setting) The appliance is continually maintained at the set temperature. Consequently, DHW draws are immediate, however the appliance may run even if no DHW is being drawn. -
Page 20: Setting Frost Protection
20 | Operation ▶ Turn the boiler high limit dial counterclockwise to reset 6 720 641 933-82.1O Fig. 7 For further information, see the operating instructions for the heating control unit included in the scope of delivery. Setting frost protection Frost protection of the heating system: ▶... -
Page 21: Activating The Key Pad Lock
Operation | 21 Alternatively if you prefer switching the appliance OFF: ▶ Ask a trained and certified heating contractor to mix anti-freeze (see installation instructions) into the heating water. All DHW pipes and DHW tank must be completely drained. Activating the key pad lock The key pad lock affects the supply temperature dial, the DHW thermostat, the service button and the ECO button. -
Page 22: Display Codes
22 | Energy saving tips Display codes Display Description Fault-Code ( chapter 6) Inspection due Pump anti-seize function active Key pad lock active Condensate trap filling function active Bleeding function active Excessively rapid increase in supply temperature (temp. gradient monitoring). Heating mode is disabled for two minutes. - Page 23 Energy saving tips | 23 Inspection/Maintenance To ensure that gas consumption and environmental impact (pollution, etc.) remain as low as possible over an extended period of time, we recommend that you sign an inspection/maintenance contract with a trained and certified heating contractor covering scheduled annual service and maintenance.
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Page 24: Troubleshooting
24 | Troubleshooting Recirculation pump If there is a DHW recirculation pump installed, use a timer program to control its operation according to the specific requirements (e.g. morning, afternoon, evening). Troubleshooting The Heatronic boiler control monitors all safety and control components. If a fault arises during operation, an audible warning tone sounds. - Page 25 Troubleshooting | 25 An overview of the display codes can be found on page 22. Appliance details If you need to call a trained and certified heating contractor, you may be asked for details on your appliance. Those details can be found on the rating plate. Greenstar (e.
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Page 26: Maintenance
Wipe down with a damp cloth. Do not use any abrasive or corrosive cleaning agents. Environmental protection and disposal Environmental protection is one of the fundamental company policies of the Bosch Group. Quality of products, efficiency and environmental protection are equally important objectives for us. -
Page 27: Quick Reference
Quick reference | 27 Quick reference Startup DHW temperature WARNING: Danger of scalding! ▶ In normal operation, it is recommended to limit the DHW temperature to 122 °F (50 °C) to limit the risk of scalding. Turning space heating ON reset reset 6 720 641 933-53.1O... - Page 28 28 | List of keywords List of keywords Certifications............10 Commissioning .
- Page 29 List of keywords | 29 Operation ............12 Overview of boiler types .
- Page 32 50 Wentworth Avenue Londonderry, NH 03053 Tel. 603-552-1100 Fax 603-965-7581 www.bosch-climate.us U.S.A. Products manufactured by Bosch Thermotechnik GmbH Junkersstrasse 20-24 D-73249 Wernau www.bosch-thermotechnology.com Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing engineering and technological advances.