38
Installation - for contractors
15.3
Increasing the temperature
At 230 V, the following water temperature increases result:
1,4
1,8
2,2
2,6
3,0
3,4
20,0
22,5
25,0
27,5
30,0
32,5
35,0
37,5
40,0
42,5
45,0
3
2
1
84
_0
2_0
2_00
56
X Flow rate in l/min
Y Temperature increase in K
1 3.5 kW - 230 V
2 4.4 kW - 230 V
3 5.7 kW - 230 V
Example
mtH
350
with 3.5 kW
Flow rate
l/min
2.0
Increasing the temperature
K
25
Cold water supply temperature
°C
12
Maximum possible outlet temperature
°C
37
note
An outlet temperature of 50 °C can be achieved with
the lowest possible flow rate and the following cold
water inlet temperatures:
º
MTH 350 > 18 °C
º
MTH 440 > 21 °C
º
MTH 570 > 22 °C
15.4
Application areas
For the specific electrical resistance and
specific electrical conductivity, see "Data
table".
Standard specifica
-
tion at 15 °C
20 °C
25 °C
Spec.
resist-
ance
ρ ≥
Spec. conduc-
tivity σ ≤
Spec.
resist-
ance
ρ ≥
Spec. conduc-
tivity σ ≤
Spec.
resist-
ance
ρ ≥
Spec. conduc-
tivity σ ≤
Ωcm
mS/m
μS/cm
Ωcm
mS/m
μS/cm
Ωcm
mS/m
μS/cm
900
111 1111
800
125 1250
735
136 1361
1000
100 1000
890
112 1124
815
123 1227
1100
91
909
970
103 1031
895
112 1117
1200
83
833 1070
93
935
985
102 1015
1300
77
769 1175
85
851 1072
93
933