Bosch UT-L 1 Technical Manual page 29

Max.
Boiler rated
type Boiler size output
[kw]
UT-L 1
UT-L 2
UT-L 4 1000
UT-L 6 1000
UT-L 8 1250
UT-L 10 1350
UT-L 12 1500
UT-L 14 1900
UT-L 16 2000
UT-L 18 2500
UT-L 20 2500
UT-L 22 3000
UT-L 24 3050
UT-L 26 3500
UT-L 28 3700
UT-L 30 4200
UNIMAT
boiler UT-L 32 4250
UT-L
UT-L 34 5200
UT-L 36 5250
UT-L 38 6000
UT-L 40 6500
UT-L 42 7700
UT-L 44 8000
UT-L 46 9300
UT-L 48 10000
UT-L 50 11200
UT-L 52 12000
UT-L 54 12600
UT-L 56 14000
UT-L 58 14700
UT-L 60 16400
UT-L 62 17500
UT-L 64 19200
Table 17 Boiler efficiency and standard seasonal
efficiency [to DIN] for UNIMAT boilers UT-L
1) Relative to a system temperature of 80/60 °C. At other system
temperatures, the boiler efficiency changes.
2) Relative to the maximum rated output; for reduced rated
output levels, the boiler efficiency rises accordingly.
UNIMAT
Standard
seasonal
Boiler efficiency
efficiency [to DIN]
1)2)
η η
K N
650 92.2 94.9
750 92.4 95.2
91.8 94.9
93.3 95.7
92.4 95.3
92.9 95.6
92.6 95.5
91.4 94.8
92.3 95.3
91.7 95.0
93.1 95.8
92.7 95.6
91.3 94.8
92.7 95.6
92.3 95.4
92.0 95.2
92.0 95.2
91.9 95.2
92.6 95.6
93.0 95.8
91.3 94.9
92.0 95.2
92.8 95.6
92.2 95.4
93.1 95.8
92.2 95.4
92.6 95.6
92.7 95.6
93.5 96.0
92.2 95.4
93.4 96.0
92.9 95.7
92.8 95.7
Standby loss
The standby loss is part of the rated heat input that is
required to achieve the specified boiler water
temperature. The cause of this loss is the cooling down
of the boiler through radiation and convection during the
1) 2)
standby time (burner idle time).
Boiler type Boiler size
UNIMAT
UT-L boiler
Table 18 Standby loss for UNIMAT UT-L boilers
1) Relative to a system temperature of 80/60 °C
2) Relative to the maximum rated output
Technical description | 29
Max.
rated Standby loss
output
[kw] [kW]
UT-L 1 650 2.16
UT-L 2 750 2.36
UT-L 4 1000 2.80
UT-L 6 1000 2.80
UT-L 8 1250 3.20
UT-L 10 1350 3.35
UT-L 12 1500 3.57
UT-L 14 1900 4.12
UT-L 16 2000 4.24
UT-L 18 2500 4.85
UT-L 20 2500 4.85
UT-L 22 3000 5.41
UT-L 24 3050 5.47
UT-L 26 3500 5.94
UT-L 28 3700 6.14
UT-L 30 4200 6.62
UT-L 32 4250 6.67
UT-L 34 5200 7.53
UT-L 36 5250 7.57
UT-L 38 6000 8.20
UT-L 40 6500 8.61
UT-L 42 7700 9.53
UT-L 44 8000 9.75
UT-L 46 9300 10.67
UT-L 48 10000 11.15
UT-L 50 11200 11.93
UT-L 52 12000 12.44
UT-L 54 12600 12.81
UT-L 56 14000 13.64
UT-L 58 14700 14.05
UT-L 60 16400 15.00
UT-L 62 17500 15.59
UT-L 64 19200 16.49
6 720 807 794 (2013/04)
1)
q
B
2)
%
0.333
0.314
0.28
0.28
0.256
0.248
0.238
0.217
0.212
0.194
0.194
0.18
0.179
0.17
0.166
0.158
0.157
0.145
0.144
0.137
0.132
0.124
0.122
0.115
0.111
0.107
0.104
0.102
0.097
0.096
0.091
0.089
0.086