Siemens DE1821515: Technical data

en

VI.

A

If the continuous-flow heater does not have sufficient

Startup/additional information

water flow due to low water line pressure in your do-

The device is compliant to IEC 61000-3-12.

mestic plumbing system, remove the flow-rate

limiter.

First start-up

B

Priority circuit for the combination with electrical

■

Switch on the fuses.

storage heaters:

For operation with a priority circuit, a special load

Setting the temperature. ■

shedding relay BZ 45L20 (special accessory) is re-

Starts rinsing: Open the warm water tap and allow water ■

quired. Other existing load shedding relays, with the

to flow for at least 1 minute (flow-rate at least 6 litres per

exception of electronic load shedding relays, may

minute). Only then (for safety reasons) will the appliance

malfunction.

begin to heat.

Tip: Should the appliance not start because of a reduced

C

The control electronics must be coded when operated

with a load shedding relay.

flow-rate, remove the perlator, shower head or similar before

start and repeat the process.

■

Remove the flow-rate limiter (see Fig. A) with low water

pressure.

■

Explain the operation of the continuous-flow heater to

the user.

Technical data

DE 1821515

DE 2427515

DE 5151821

DE 5152427

18

24

Rated output

[kW]

21

27

Rated voltage

[V] 400 400

Fuse protection

[A] 32 40

2

Minimum conductor cross-section

[mm

]4 6

Warm water flow at rated output

with temperature increase from

9.9

13.2

12 °C to 38 °C [l/min]

11.6

13.9

5.4

7.2

12 °C to 60 °C [l/min]

6.3

7.6

Start-up flow

[l/min] 2.6 2.6

Start-up flow pressure *

[MPa (bar)] 0.025 (0.25) 0.025 (0.25)

Application area in water

specific electric resistance at 15 °C

[Ωcm] ≥ 1 300 ≥ 1 300

Rated pressure

[MPa (bar)] 1.0 (10.0) 1.0 (10.0)

Maximum permissible supply temperature

[°C] 55 55

Maximum mains impedance at connection point

[Ω] ≤ 0.44 ≤ 0.244

* The pressure loss on the mixer must also be added

Operation with prewarmed water (solar heated)

Important: The cold water supply temperature must not be

higher than 55 °!

The continuous-flow heater can only heat prewarmed water

to a max. of 60 °C. If the cold water supply exceeds a tem-

If the cold water supply exceeds a temperature of 60 °C, a

perature of 55 °C, the water will not be warmed any further.

circuit breaker will trigger and shut the appliance off. There-

fore, the residential plumbing must be equipped with a ther-

mostatic premixer (e. g. special accessory BZ 45T20) that will

limit the cold water supply temperature to a max. of 55 ° by

appropriately mixing in cold water.

9