7.5 Setting the Temperature
Set the required (maximum) domestic hot water temperature on the controller under "Para". To ensure that
scalding cannot occur at the water valve, the maximum hot water temperature must not exceed 60 °C.
Primary side
The temperature required in the buffer tank on the primary side depends on the desired hot water tempera-
ture and the required dispensing quantity. The temperature in the buffer tank must be at least 5 K above the
required hot water temperature.
Secondary side
The possible dispensing medium flow rate [l/min] on the water valve depends on the hot water temperature
that is set in the controller and the temperature that is available in the storage tank. The recommended max-
imum domestic water medium flow rate through the fresh water module is 25 l/min. The following table
shows the relationship between the storage tank temperature and the maximum dispensing medium flow
rate that is connected when the temperature on the valve is 45 °C (e.g. single-lever mixer). If the hot water
temperature that is set on the Controller is higher than 45 °C, the dispensing medium flow rate consists of a
mixture of hot and cold water. The transmission capacity that is specified for this is required to warm the
water quantity of the dispensing medium flow rate [l/min] from 10 °C to 45 °C.
EFS 35 Single and Duo
Tempera-
ture in
buffer
tank
probe
S08
[°C]
HW tem-
perature
set on
the con-
troller
[°C]
Maximum medium
flow rate from the
fresh water station
with the set. HW
temperature
[l/min]
Maximum dis-
pensing medium
flow rate at the
water valve for an
HW Temperature
of 45 °C
[l/min]
Transmission
capacity of the fresh
water station
[kW]
Return
tempera-
ture to
the
storage
tank
[°C]
Single
Duo
Single
Duo
Single
Duo
45
40
34
68
---
---
71
142
20
50
40
44
88
---
---
92
184
18
45
32
64
---
---
79
158
22
55
40
53
106
---
---
111
222
16
45
42
84
---
---
102
204
19
50
31
62
35
70
87
174
24
60
40
61
122
---
---
128
256
15
45
50
100
---
---
121
242
17
50
40
80
45
90
111
222
21
55
30
60
39
78
95
190
27
65
40
65
130
---
---
135
270
14
45
57
114
---
---
138
276
16
50
47
94
53
106
131
262
19
55
39
78
49
98
120
240
23
60
15
30
42
84
103
206
29
70
40
65
130
*)
---
---
135
270
13
45
64
128
---
---
155
310
14
50
54
108
61
122
149
298
17
REMKO fresh water station
22
