Siemens DE18401 User Manual download pdf (Page 9)

Technical data

DE 18401 DE 21401 DE 24401 DE 27401

Rated output

[kW] 18 21 24 27

Rated voltage

[V] 400 400 400 400

Fuse protection

[A] 32 32 40 40

Minimum conductor cross-section

[mm

]4 4 6 6

Warm water ﬂow at rated output

with temperature increase from

12 °C to 38 °C [l/min] 9.9 11.6 13.6 13.9

12 °C to 60 °C [l/min] 5.4 6.3 7.2 7.6

Start-up ﬂow

[l/min] 2.6 2.6 2.6 2.6

Start-up ﬂow pressure *

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

Application area in water

speciﬁc electric resistance at 15 °C

[Ωcm] ≥ 1 300 ≥ 1 300 ≥ 1 300 ≥ 1 300

Rated pressure

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

Maximum permissible supply temperature

[°C] 20 20 20 20

Maximum mains impedance at connection

point

[Ω] ≤ 0.400 ≤ 0.400 ≤ 0.400 ≤ 0.400

* The pressure loss on the mixer must also be added.

If the continuous-ﬂow heater does not have sufﬁcient

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

mestic plumbing system, remove the ﬂow-rate

limiter.

Priority circuit for the combination with electrical

storage heaters:

For operation with a priority circuit, a special load

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

quired. Other existing load shedding relays, with the

exception of electronic load shedding relays, may

malfunction.

The control electronics must be coded when operated

with a load shedding relay.

Special accessories

Pipe kit ■ BZ 45U20: for use of the continuous-ﬂow heater

as an under sink appliance

Priority switch (load shedding relay) ■ BZ 45L20:

for operation with a priority circuit

Mounting kit

■ BZ 45K23: for surface mount installation

Status display on the appliance

LED Appliance status

Off Off

Lights up Ready

Slow ﬂash (1/s) Appliance is heating

Fast ﬂash (4/s) Desired water temperature is not

reached (water ﬂow too high for

appliance rating).

The ﬁlter upstream from the check valve in the cold

water supply inlet is clogged.

Remove the ﬁlter and either clean it or descale it.

See Figure E 1–3.

472

236

100

332

388

124

137

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 47 48

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Siemens DE18401 User Manual Page 9

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