Table Of Contents - Bosch UT-L 1 Technical Manual

2 | Table of contents

Table of contents
1 Oil/gas special boilers . . . . . . . . . . . . . . . . . . . . . 4
1.1 Types and heating output . . . . . . . . . . . . . . 4
1.2 Overview of models . . . . . . . . . . . . . . . . . . 4
1.3 Possible applications . . . . . . . . . . . . . . . . . 4
1.4 Features and benefits . . . . . . . . . . . . . . . . . 4
2 Basic principles . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Basic principles of condensing technology . 5
2.1.1 Net and gross calorific values . . . . . . . . . . . 5
2.1.2 Boiler efficiency above 100 % . . . . . . . . . . . 5
2.2 Making optimal use of condensing
technology . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2.1 Matching to the heating system . . . . . . . . . 6
2.2.2 High standard seasonal efficiency [to DIN] 7
2.2.3 Design information . . . . . . . . . . . . . . . . . . . 7
2.3 Economic viability considerations . . . . . . . 7
2.3.1 Simplified comparison of conventional
boilers and condensing boilers or boilers
with condensing heat exchangers . . . . . . . 7
3 Technical description . . . . . . . . . . . . . . . . . . . . . . 8
3.1 UNIMAT UT-L boiler . . . . . . . . . . . . . . . . . . . 8
3.1.1 Equipment overview . . . . . . . . . . . . . . . . . . 8
3.1.2 Function principle . . . . . . . . . . . . . . . . . . . . 9
3.2 UNIMAT UT-L boiler . . . . . . . . . . . . . . . . . . 10
3.2.1 Version overview . . . . . . . . . . . . . . . . . . . . 10
3.2.2 Function principle . . . . . . . . . . . . . . . . . . . 11
3.3 Dimensions and specification for the
flue gas heat exchangers . . . . . . . . . . . . . 12
3.3.1 UNIMAT UT-L boiler . . . . . . . . . . . . . . . . . . 12
3.3.2 Integrated heat exchanger without
condensing technology - ECO 7 . . . . . . . 14
3.3.3 Integrated heat exchanger with
condensing technology - ECO6 . . . . . . . . 16
3.3.4 Stand-alone flue gas heat exchanger
without condensing technology - ECO 7 . 18
3.3.5 Stand-alone flue gas heat exchanger
with condensing technology - ECO 6 . . . 20
3.4 Connections . . . . . . . . . . . . . . . . . . . . . . . 22
3.4.1 Flow and return . . . . . . . . . . . . . . . . . . . . 22
3.4.2 Flue outlet connection . . . . . . . . . . . . . . . 22
3.4.3 Connector . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.5 Characteristics . . . . . . . . . . . . . . . . . . . . . 24
3.5.1 Pressure loss on the water side . . . . . . . . 24
3.5.2 Pressure loss on the hot gas side . . . . . . . 25
3.5.3 Combustion chamber volume load . . . . . . 27
3.5.4 Boiler efficiency, standard seasonal
efficiency [to DIN] and standby loss . . . . 28
3.5.5 Flue gas temperature . . . . . . . . . . . . . . . . 30
4 Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1 General requirements . . . . . . . . . . . . . . . . 32
4.2 Information on burner selection . . . . . . . . 32
6 720 807 794 (2013/04)
4.3 Matched pressure-jet burners . . . . . . . . . 32
4.4 Combustion details for the UNIMAT UT-L
boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5 Regulations and operating conditions . . . . . . . 35
5.1 Extracts from the regulations . . . . . . . . . 35
5.2 German Immissions Act (BImSchG) . . . . 36
5.2.1 Table extracted from the 1st BImSchV
"Small and medium-sized combustion
systems" . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.2.2 Information on flue gas tests pursuant to
BImSchV/TA Luft
5.3 Operating requirements . . . . . . . . . . . . . 38
5.3.1 Operating conditions . . . . . . . . . . . . . . . . 38
5.3.2 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.3.3 Corrosion protection in heating systems
5.3.4 Corrosion protection if system out of
use for long periods . . . . . . . . . . . . . . . . . 39
5.3.5 Guidelines for water quality . . . . . . . . . . 39
5.3.6 Minimum requirements of water analyses
for designing a water treatment system . . 41
6 Sound pressure level from noise in the boiler
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1 Sound emissions from the boiler system
6.2 Noise in the installation room . . . . . . . . . 42
6.3 Noise at the chimney outlet . . . . . . . . . . 42
7 Boiler control and control system . . . . . . . . . . 43
7.1 CFB 810 control unit with CME 930
auxiliary module . . . . . . . . . . . . . . . . . . . . 43
7.2 CFB 930 and CFB 910 control units . . . . 44
7.3 Side control unit holder . . . . . . . . . . . . . 45
7.4 UNIMATIC display units and control units 46
7.5 BCO boiler control . . . . . . . . . . . . . . . . . 46
8 DHW heating . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1 Systems for DHW heating . . . . . . . . . . . . 47
8.2 DHW temperature control . . . . . . . . . . . . 47
9 System examples . . . . . . . . . . . . . . . . . . . . . . . 47
9.1 Information regarding all system
examples . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.1.1 Hydraulic connection . . . . . . . . . . . . . . . . 48
9.1.2 Control system . . . . . . . . . . . . . . . . . . . . 48
9.1.3 DHW heating . . . . . . . . . . . . . . . . . . . . . . 48
9.1.4 Pipework schemes . . . . . . . . . . . . . . . . . 49
9.2 Safety equipment to DIN-EN 12828 . . . . 52
9.2.1 Requirements . . . . . . . . . . . . . . . . . . . . . 52
9.2.2 Layout of safety components to DIN-EN
12828 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.2.3 Safety equipment for the flue gas heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.2.4 Maximum operating flow temperatures . 53
9.3 Sizing and installation information . . . . . 53
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UNIMAT