0020308121_04 Installation and maintenance instructions 9
Technical data – Heating
VUI 30/40
Max. flow temperature
85 ℃
Flow temperature adjustment range (factory set-
ting: 75 °C)
30 to 80 ℃
Permissible operating pressure
0.25 MPa
(2.50 bar)
Nominal circulation water volume based on
ΔT = 20 K, 80/60 °C
1,318 l/h
Approx. condensate rate (pH value 3.5 to 4.0) in
50/30 °C heating mode
3.1 l/h
Remaining pump head at nominal circulation
water volume
0.025 MPa
(0.250 bar)
Technical data – Domestic hot water
VUI 30/40
Start-up flow rate
1.8 l/min
Specific flow rate D (ΔT = 30 K) (EN 13203-1)
21.0 l/min
Flow rate (ΔT = 35 K)
18.0 l/min
Permissible operating pressure
0.95 MPa
(9.50 bar)
Required connection pressure
0.07 MPa
(0.70 bar)
Domestic hot water temperature adjustment
range
35 to 65 ℃
Flow rate limiter
14 l/min
Classification in accordance with the total com-
fort factor (EN 13203-1)
* * *
Cylinder capacity
15.0 l
Technical data – Electrics
VUI 30/40
Nominal voltage/mains frequency
230 V/50 Hz
Permissible connected voltage
190 to 253 V
Built-in fuse (slow-blow)
4 A
Max. electrical power consumption for heating
mode
98.5 W
Max. power consumption in domestic hot water
mode
149 W
Electrical standby energy consumption
< 2 W
IP rating
IP X5 D
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