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INSTALLATION
16.3 Hot water output
The domestic hot water (DHW) output is subject to the connected
power supply, the water heater's connected load, and the cold water
inlet temperature. The rated voltage and rated output can be found
on the type plate.
Power output in kW
Rated voltage
Model
DHC
3.0
3/3.5-1
Trend
3.5
2.9
DHC
4.5
4/6-2
3.8
Trend
6.0
5.4
DHC
7.2
8/10-2
7.2
Trend
9.6
9.0
DHC
10.8
12/15-2
12.0
Trend
14.4
Power output in kW
Rated voltage
Model
DHC
3.0
3/3.5-1
Trend
3.5
2.9
DHC
4.5
4/6-2
3.8
Trend
6.0
5.4
DHC
7.2
8/10-2
7.2
Trend
9.6
9.0
DHC
10.8
12/15-2
12.0
Trend
14.4
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100 °F DHW output in gpm
Cold water inlet temperature
41 °F
50 °F
59 °F
68 °F
0.35
0.41
0.5
0.64
0.41
0.48
0.58
0.75
0.34
0.4
0.48
0.62
0.52
0.61
0.75
0.96
0.44
0.52
0.63
0.81
0.69
0.82
1.0
1.28
0.63
0.74
0.9
1.15
0.83
0.98
1.2
1.54
0.83
0.98
1.2
1.54
1.11
1.31
1.6
2.05
1.04
1.23
1.5
1.92
1.24
1.46
1.78
2.28
1.39
1.64
2.0
2.56
1.67
1.97
2.4
3.07
122 °F DHW output in gpm
Cold water inlet temperature
41 °F
50 °F
59 °F
68 °F
-
0.28
0.33
0.38
0.3
0.33
0.38
0.44
-
0.28
0.31
0.37
0.38
0.43
0.49
0.57
0.32
0.36
0.41
0.48
0.51
0.57
0.65
0.76
0.46
0.51
0.59
0.68
0.61
0.68
0.78
0.91
0.61
0.68
0.78
0.91
0.81
0.91
1.04
1.21
0.76
0.85
0.98
1.14
0.9
1.02
1.16
1.35
1.01
1.14
1.3
1.52
1.21
1.37
1.56
1.82
Power output in kW
Rated voltage
Model
DHC
3.0
3/3.5-1
Trend
3.5
2.9
DHC
4.5
4/6-2
3.8
Trend
6.0
5.4
DHC
7.2
8/10-2
7.2
Trend
9.6
9.0
DHC
10.8
12/15-2
12.0
Trend
14.4
Power output in kW
Rated voltage
Model
DHC
3.0
3/3.5-1
Trend
3.5
2.9
DHC
4.5
4/6-2
3.8
Trend
6.0
5.4
DHC
7.2
8/10-2
7.2
Trend
9.6
9.0
DHC
10.8
12/15-2
12.0
Trend
14.4
16.4 Application areas/conversion table
Here, data is shown for electrical resistivity and electrical conduc-
tivity.
Standard specifica-
Min.
Max.
Min.
resistivity
conductivity
≤
resistivity
ρ ≥
ρ ≥
Ωcm
mS/m μS/cm
Ωcm
1100
91
910
970
16.4.1 Sizing the pipework
When calculating the size of the pipework, an water heater pressure
drop of 14.5 psi (0.97 bar) is recommended.
16.5 Fault conditions
In the event of a fault, temperatures up to 176 °F (80 °C) at a pressure
of 145 psi (1.0 MPa) can occur briefly in the installation.
38 °C DHW output in l/min
Cold water inlet temperature
5 °C
10 °C
15 °C
20 °C
1.3
1.5
1.9
2.4
1.5
1.8
2.2
2.8
1.3
1.5
1.8
2.3
1.9
2.3
2.8
3.6
1.7
2.0
2.4
3.0
2.6
3.1
3.7
4.8
2.3
2.8
3.4
4.3
3.1
3.7
4.5
5.7
3.1
3.7
4.5
5.7
4.2
4.9
6.0
7.6
3.9
4.6
5.6
7.1
4.6
5.5
6.6
8.5
5.2
6.1
7.5
9.5
6.2
7.3
8.9
11.4
50 °C DHW output in l/min
Cold water inlet temperature
5 °C
10 °C
15 °C
20 °C
1.0
1.1
1.2
1.4
1.1
1.3
1.4
1.7
-
1.1
1.2
1.4
1.4
1.6
1.8
2.1
1.2
1.4
1.6
1.8
1.9
2.1
2.4
2.9
1.7
1.9
2.2
2.6
2.3
2.6
2.9
3.4
2.3
2.6
2.9
3.4
3.0
3.4
3.9
4.6
2.9
3.2
3.7
4.3
3.4
3.8
4.4
5.1
3.8
4.3
4.9
5.7
4.6
5.1
5.9
6.9
Max.
Min.
Max.
conductivity
≤
resistivity
conductivity
ρ ≥
mS/m μS/cm
Ωcm
mS/m μS/cm
103
1031
895
112
DHC Trend |
≤
1117
17
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