Bosch ZWB28-3A - Page 3

Contents | 3
6 720 643 068 (2011/06)Copyright (optional information)
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.1 Before operating the appliance . . . . . . . . 59
7.2 Switching the appliance ON/OFF . . . . . . . 59
7.3 Setting up space heating . . . . . . . . . . . . . 60
7.4 Programming the FW 200 heating
control unit . . . . . . . . . . . . . . . . . . . . . . . 60
7.5 After commissioning . . . . . . . . . . . . . . . . . 60
7.6 ZBR..-3A appliances (heating boilers) with
DHW tank: Setting the DHW temperature 61
7.7 ZWB..-3A appliances (combi boilers):
Setting the DHW temperature . . . . . . . . . 61
7.8 Setting manual summer mode . . . . . . . . . 62
7.9 Setting frost protection . . . . . . . . . . . . . . 62
7.10 Activating the key pad lock . . . . . . . . . . . 63
8 ZBR..-3A appliances (heating boiler) with
DHW tank: Thermal disinfection . . . . . . . . . . . . . 63
9 Boiler circulator . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.1 Pump anti-seize protection . . . . . . . . . . . 64
9.2 Changing the pump curve of the
boiler pump . . . . . . . . . . . . . . . . . . . . . . . 64
10 Heatronic boiler control settings . . . . . . . . . . . . . 65
10.1 Guideline to service functions . . . . . . . . . 65
10.2 Overview of the service functions . . . . . . 66
10.2.1 First service level . . . . . . . . . . . . . . . . . . . 66
10.2.2 Second service level . . . . . . . . . . . . . . . . . 66
10.3 Description of the service functions . . . . 67
10.3.1 First service level . . . . . . . . . . . . . . . . . . . 67
10.3.2 Second service level . . . . . . . . . . . . . . . . . 73
11 Gas type conversion . . . . . . . . . . . . . . . . . . . . . . . 75
11.1 Converting to a different gas type . . . . . . 75
11.2 Installation location higher than 2,000 feet
(610 m) above sea level . . . . . . . . . . . . . 76
11.3 Setting the gas-air ratio (CO
2
or O
2
) . . . . 76
11.4 Dynamic gas pressure test . . . . . . . . . . . 78
12 Flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.1 Emissions test button . . . . . . . . . . . . . . . 79
12.2 Measuring CO content of flue gas . . . . . . 79
13 Environmental responsibility/disposal . . . . . . . . . 80
14 Inspection and maintenance . . . . . . . . . . . . . . . . 81
14.1 Description of various steps . . . . . . . . . . 82
14.1.1 Calling up the latest fault (service
function 6.A) . . . . . . . . . . . . . . . . . . . . . . .82
14.1.2 Fresh water filter (only combi boiler
ZWB..-3A) . . . . . . . . . . . . . . . . . . . . . . . . .82
14.1.3 Plate type heat exchanger
(only combi boiler ZWB..-3A) . . . . . . . . . .82
14.1.4 Checking the electrodes . . . . . . . . . . . . . 83
14.1.5 Burner servicing . . . . . . . . . . . . . . . . . . . . 84
14.1.6 Heat exchanger block inspection and
cleaning . . . . . . . . . . . . . . . . . . . . . . . . . .84
14.1.7 Condensate trap cleaning . . . . . . . . . . . . 86
14.1.8 Checking the mixer diaphragm . . . . . . . . 86
14.1.9 Expansion vessel . . . . . . . . . . . . . . . . . . . 87
14.1.10 Setting the boiler water pressure . . . . . . 87
14.1.11 Testing system water quality . . . . . . . . . . 87
14.1.12 Inspecting electrical wiring . . . . . . . . . . . 87
14.2 Checklist for inspection and maintenance 88
15 Readings on the display . . . . . . . . . . . . . . . . . . . . 89
16 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
16.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . 90
16.2 Faults that are shown on the display . . . . 91
16.3 Faults that are not shown on the display 94
16.4 Check sensor values . . . . . . . . . . . . . . . . 95
16.4.1 Outdoor temperature sensor . . . . . . . . . . 95
16.4.2 Additional supply temperature limiter . . . 95
16.4.3 Supply temperature sensor, External
supply temperature sensor, DHW tank
temperature sensor, DHW temperature
sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
16.5 Replacement code plug . . . . . . . . . . . . . . 96
17 Commissioning log for the appliance . . . . . . . . . 97
18 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115