Table of Contents
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ZBR...-3A appliances (heating boiler) with DHW tank:
10 Boiler circulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1
Pump anti-seize protection . . . . . . . . . . . . . . . . . . . . . . 54
10.2
Changing the pump curve of the boiler pump . . . . . . . . 54
11 Heatronic boiler control settings . . . . . . . . . . . . . . . . . . . . . . . 55
11.1
Guideline to service functions . . . . . . . . . . . . . . . . . . . . 55
11.2
Overview of the service functions . . . . . . . . . . . . . . . . . 56
button until it lights up) . . . . . . . . . . . . . . . . . . . . . . . . . 56
lock button simultaneously until 8.A appears) . . . . . . . 56
11.3
Description of the service functions . . . . . . . . . . . . . . . 56
11.3.1 First service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
11.3.2 Second service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
12 Gas adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
12.1
Converting to a different gas type . . . . . . . . . . . . . . . . . 62
12.2
m) above sea level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
12.3
Checking and setting the gas-air ratio (CO
if required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
12.4
Dynamic gas pressure test port . . . . . . . . . . . . . . . . . . . 64
13 Flue gas test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13.1
Emissions test button . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13.2
Measuring CO content of flue gas . . . . . . . . . . . . . . . . . 64
14 Environmental protection and disposal. . . . . . . . . . . . . . . . . . 65
15 Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
15.1
Description of various steps. . . . . . . . . . . . . . . . . . . . . . 66
15.1.2 Fresh water filter (only combi boiler ZWB...-3A) . . . . . 66
15.1.4 Checking electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
15.1.5 Burner servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
15.1.6 Heat exchanger block inspection and cleaning . . . . . . . 68
15.1.7 Cleaning condensate trap. . . . . . . . . . . . . . . . . . . . . . . . 69
15.1.8 Checking the mixer diaphragm . . . . . . . . . . . . . . . . . . . 69
15.1.9 Checking the expansion vessel . . . . . . . . . . . . . . . . . . . 70
15.1.10 Setting the boiler water pressure . . . . . . . . . . . . . . . . . 70
15.1.11 Testing system water quality . . . . . . . . . . . . . . . . . . . . . 70
15.1.12 Checking the electrical wiring . . . . . . . . . . . . . . . . . . . . 70
15.2
Maintenance and inspection checklist. . . . . . . . . . . . . . 71
16 Readings on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Greenstar - 6721822579 (2021/01)
17 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
17.1
17.2
17.3
17.4
17.4.1 Outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . .77
17.4.2 Additional supply temperature limiter. . . . . . . . . . . . . .77
17.5
18 Commissioning log for the appliance . . . . . . . . . . . . . . . . . . .78
or O
),
2
2
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Faults that are shown on the display . . . . . . . . . . . . . . .74
Faults that are not shown on the display . . . . . . . . . . . .76
Check sensor values. . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Replacement code plug . . . . . . . . . . . . . . . . . . . . . . . . .77
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