Operation With Pre-Heated Water; Technical Data And Areas; Area Of Application; For The Qualified Installer - STIEBEL ELTRON DEL 24 SLi Gebrauchs- Und Montageanweisung

4. Installation alternatives
Operation with pre-heated water; Temperature cut-out
4.11 Operation with pre-hea-
ted water
The DEL ... SLi electronic LCD permits further
heating of the inlet water up to max. 60 °C.
With inlet temperatures above 55 °C
the water is not heated.
A maximum inlet temperature of 60 °C is
ensured by the installation of a central ther-
mostat fitting (see "7. Special fittings").

5. Technical data and areas

5.1 Technical Data
(The data on the unit rating plate apply)
Typ
Nennleistung
Pressure drop *
With DMB
Without DMB
Flow rate limiter (DMB)
Rated content
Design
Rated pressure
Weight
Protection class to DIN EN 60335
Protection class to EN 60529
Test mark
Water connection (external thread)
Electrical connection
VDEW approval
Bare wire - Heating system
perature
Cold water inlet tem
Area of use
Flow rate "in"
Table 2
* Values for pressure losses also apply for minimum flow pressure according to DIN 44851/flow volume for heating from 10 ºC to 60 ºC (∆ϑ 50 K).
On the basis of DIN 1988 Part 3, Table 4, pressure loss of 0.1 MPa (1 bar) is recommended with regard to the dimensioning of the pipe network.

5.2 Area of application

Specific electrical resistance and specific electrical conductivity.
Details as
Resistance
Conductivity
Conductivity
Table 3
18
for the qualified installer

4.12 Temperature cut-out

A cut-out on the outlet temperature at 43 °C
can be set by the following steps:
1. Unscrew cover fixing screw and remove
unit cover.
2. Push slide switch into position "43".
3. Fit unit cover and tighten screw.
for the qualified installer
DEL 18 SLi
electronic LCD
kW 18
MPa (bar) / l/min 0.075 (0.75) / 5.2
MPa (bar) / l/min 0.05 (0.5) / 5.2
l/min 12.0 / 7.5
Farbe brown / blue
Ranges of use for different references temperatures
Normes details
at 15 °C
Ωcm ≥ 900
mS/m ≤ 111
µS/cm ≤ 1110
M
DEL 21 SLi DEL 24 SLi
electronic LCD electronic LCD
21
0.095 (0.95) / 6.0 0.125 (1.25) / 6.9
0.065 (0.65) / 6.0 0.085 (0.85) / 6.9
12.0 / 7.5
brown / blue brown / blue
0.4 l
Closed
1 MPa (10 bar)
4.5 kg
1
IP 25 (IP 24 at electrical connection- finished walls)
See unit rating plate
G ½
3/PE ~ 400 V
Applied for
900 Ωcm (
See Table 4)
max. 65 °C
Low-lime and lime-containing water
≥ 2.5 l/min
bei 20 °C
≥ 800
≤ 125
≤ 1250
DEL 27 SLi
electronic LCD
24 27
0.155 (1.55) / 7.7
0.105 (1.05) / 7.7
12.0 / 7.5 12.0 / 7.5
brown / blue
bei 25 °C
≥ 735
≤ 136
≤ 1360