Key To Symbols And Safety Instructions; Key To Symbols - Bosch ZBR16-3A Series Installation And Service Instructions Manual

9 ZBR..-3A appliances (heating boiler) with DHW tank:
Thermal disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10 Boiler circulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 Pump anti-seize protection . . . . . . . . . . . . . . . . . . . . . . 57
10.2 Changing the pump curve of the boiler pump . . . . . . . 57
11 Heatronic boiler control settings . . . . . . . . . . . . . . . . . . . . . . . 58
11.1 Guideline to service functions . . . . . . . . . . . . . . . . . . . . 58
11.2 Overview of the service functions . . . . . . . . . . . . . . . . . 58
11.2.1 First service level (press and hold the service
button until it lights up) . . . . . . . . . . . . . . . . . . . . . . . . 58
11.2.2 Second service level (at first service level, service
button lights up, press ECO button and key pad
lock button simultaneously until 8.A appears) . . . . . . 59
11.3 Description of the service functions . . . . . . . . . . . . . . . 59
11.3.1 First service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.3.2 Second service level . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
12 Gas type conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
12.1 Converting to a different gas type . . . . . . . . . . . . . . . . . 65
12.2 Installation location higher than 2,000 feet
(610 m) above sea level . . . . . . . . . . . . . . . . . . . . . . . . 65
12.3 Setting the gas-air ratio (CO
12.4 Dynamic gas pressure test . . . . . . . . . . . . . . . . . . . . . . 67
13 Flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
13.1 Emissions test button . . . . . . . . . . . . . . . . . . . . . . . . . . 68
13.2 Measuring CO content of flue gas . . . . . . . . . . . . . . . . . 68
14 Environmental responsibility/disposal . . . . . . . . . . . . . . . . . . 68
15 Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 68
15.1 Description of various steps . . . . . . . . . . . . . . . . . . . . . 69
15.1.1 Calling up the latest fault (service function 6.A) . . . . . 69
15.1.2 Fresh water filter (only combi boiler ZWB..-3A) . . . . . 69
15.1.3 Plate type heat exchanger
(only combi boiler ZWB..-3A) . . . . . . . . . . . . . . . . . . . . 69
15.1.4 Checking the electrodes . . . . . . . . . . . . . . . . . . . . . . . . 70
15.1.5 Burner servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
15.1.6 Heat exchanger block inspection and cleaning . . . . . . 71
15.1.7 Condensate trap cleaning . . . . . . . . . . . . . . . . . . . . . . . 73
15.1.8 Checking the mixer diaphragm . . . . . . . . . . . . . . . . . . . 73
15.1.9 Expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
15.1.10Setting the boiler water pressure . . . . . . . . . . . . . . . . . 73
15.1.11Testing system water quality . . . . . . . . . . . . . . . . . . . . . 73
15.1.12Inspecting electrical wiring . . . . . . . . . . . . . . . . . . . . . . 73
15.2 Checklist for inspection and maintenance . . . . . . . . . . 74
16 Readings on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Greenstar
or O ) . . . . . . . . . . . . . . . 66
2 2

Key to symbols and safety instructions | 3

17 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
17.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
17.2 Faults that are shown on the display . . . . . . . . . . . . . . 77
17.3 Faults that are not shown on the display . . . . . . . . . . . 79
17.4 Check sensor values . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
17.4.1 Outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . 80
17.4.2 Additional supply temperature limiter . . . . . . . . . . . . . 80
17.4.3 Supply temperature sensor, External supply
temperature sensor, DHW tank temperature
sensor, DHW temperature sensor . . . . . . . . . . . . . . . . 80
17.5 Replacement code plug . . . . . . . . . . . . . . . . . . . . . . . . . 80
18 Commissioning log for the appliance . . . . . . . . . . . . . . . . . . . 81
19 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
1 Key to symbols and safety instructions
1.1

Key to symbols

Warnings
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
The following keywords are defined and can be used in this document:
• DANGER indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
• WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
• CAUTION indicates a hazardous situation which, if not avoided,
could result in minor to moderate injury.
• NOTICE is used to address practices not related to personal injury.
Important information
Important information for the proper use of the boiler is
also provided in this manual. You will find the
information with a symbol shown on the left and
bordered by horizontal lines above and below the text.
Additional symbols
Symbol Explanation
▶ Sequence of steps

Cross-reference to other points in this document or to other
documents
• Listing/list entry
- Listing/list entry (2nd level)
Table 1
6 720 806 992 (2015/03)