Buderus Logamax plus GB142-24 Installation And Servicing Instructions page 4

Contents
14.12 Checking the hot surface ignitor;
Supply cord . . . . . . . . . . . . . . . . . . . . . . . . . . 57
14.13 Replacing the hot surface ignitor . . . . . . . . . 58
14.14 Testing the ionization current . . . . . . . . . . . . 59
14.15 Checking the ionization electrode; cable . . . 60
14.16 Checking the ionization electrode;
replace if necessary . . . . . . . . . . . . . . . . . . . 61
14.17 Checking the gas control valve; cable
connections . . . . . . . . . . . . . . . . . . . . . . . . . . 62
14.18 Checking the gas control valve; Control . . . . 62
14.19 Checking the gas control valve; Cable
connection between gas control valve
and UBA3 installation base . . . . . . . . . . . . . . 62
14.20 Ohming out the gas control valve . . . . . . . . . 64
14.21 Replacing the gas control valve . . . . . . . . . . 65
14.22 Checking the control unit;
connections to the appliance . . . . . . . . . . . . 68
14.23 Transformer; checking and if necessary
replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
14.24 Automatic air purging system; replacing . . . . 72
14.25 Burner; replacing. . . . . . . . . . . . . . . . . . . . . . 73
14.26 Sight glass; replacing . . . . . . . . . . . . . . . . . . 76
14.27 Condensate trap; replacing . . . . . . . . . . . . . . 77
14.28 Pressure sensor; replacing . . . . . . . . . . . . . . 77
14.29 Heat exchanger; replacing . . . . . . . . . . . . . . 78
14.30 UBA3; replacing . . . . . . . . . . . . . . . . . . . . . . 85
15 Converting the appliance to propane
or high altitude conversion . . . . . . . . . . . . 86
16 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
16.1 Operating messages . . . . . . . . . . . . . . . . . . . 87
16.2 Error messages. . . . . . . . . . . . . . . . . . . . . . . 88
16.3 Technical specifications . . . . . . . . . . . . . . . . 89
17.1 Start-up report . . . . . . . . . . . . . . . . . . . . . . . . 91
17.2 Inspection report . . . . . . . . . . . . . . . . . . . . . . 92
17.3 Maintenance report . . . . . . . . . . . . . . . . . . . . 93
18 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . 94
19 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
We reserve the right to make any changes due to technical modifications!
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Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net