Operating Instructions and Installation Instructions

39
Installation - for contractors
15.3 Increasing the temperature
At 230 V / 400 V, the following water temperature increas-
es occur:
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
4
3
2
1
84_02_02_0029
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
4 6.5 kW - 400 V
Example MTD 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 ow rate and the following cold
water inlet temperatures:
º MTD 350 > 18 °C
º MTD 440 > 21 °C
º MTD 570 > 22 °C
º MTD 650 > 15 °C
15.4 Application areas
For the specic electrical resistance and
specic 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
1100 91 909 970 103 1031 895 112 1117