STIEBEL ELTRON DEL 18/21/24 Plus - Pressure, Faults, and Energy Data

INSTALLATION

42 | DEL Plus www.stiebel-eltron.com
17.3 DHW output
The DHW output is subject to the connected power supply, the
appliance's connected load and the cold water inlet temperature.
The rated voltage and rated output can be found on the type plate.
Connected load in kW 
Rated voltage Cold water inlet temperature
380 V      
DEL 18/21/24 Plus
16.2 7.0 8.3 10.1 12.9
19 8.2 9.7 11.8 15.1
21.7 9.4 11.1 13.5 17.2
18 7.8 9.2 11.2 14.3
21 9.1 10.7 13.0 16.7
24 10.4 12.2 14.9 19.0
19.4 8.4 9.9 12.0 15.4
22.6 9.8 11.5 14.0 17.9
25.8 11.2 13.2 16.0 20.5
DEL 27 Plus
24.4 10.6 12.4 15.2 19.4
27 11.7 13.8 16.8 21.4
Connected load in kW 50 °C DHW output in l/min
Rated voltage Cold water inlet temperature
380 V      
DEL 18/21/24 Plus
16.2 5.1 5.8 6.6 7.7
19 6.0 6.8 7.8 9.0
21.7 6.9 7.8 8.9 10.3
18 5.7 6.4 7.3 8.6
21 6.7 7.5 8.6 10.0
24 7.6 8.6 9.8 11.4
19.4 6.2 6.9 7.9 9.2
22.6 7.2 8.1 9.2 10.8
25.8 8.2 9.2 10.5 12.3
DEL 27 Plus
24.4 7.7 8.7 10.0 11.6
27 8.6 9.6 11.0 12.9
17.4 Application areas/ Conversion table
Specific electrical resistance and specific electrical conductivity
Standard specifica-
  
Resis-
tivity
ρ≥
Conductivity σ≤ Resis-
tivity
ρ≥
Conductivity σ≤ Resis-
tivity
ρ≥
Conductivity σ≤
Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm
900 111 1111 800 125 1250 735 136 1361
17.5 Pressure drop
Taps
Tap pressure drop at a flow rate of 10 l/min
Mono lever mixer tap, approx. MPa 0.04 - 0.08
Thermostatic valve, approx. MPa 0.03 - 0.05
Shower head, approx. MPa 0.03 - 0.15
Sizing the pipework
When calculating the size of the pipework, an appliance pressure
drop of 0.1MPa is recommended.
17.6 Fault conditions
In the event of a fault, loads up to 80°C at a pressure of 1.0 MPa
can occur briefly in the installation.
17.7 Energy consumption data
Product datasheet: Conventional water heaters to regulation (EU) no. 812/2013 and 814/2013
DEL 18/21/24 Plus DEL 27 Plus
236739 236740
Manufacturer STIEBEL ELTRON STIEBEL ELTRON
Load profile S S
Energy efficiency class A A
Energy conversion efficiency % 39 39
Annual power consumption kWh 476 475
Default temperature setting °C 60 60
Sound power level dB(A) 15 15
Special information on measuring efficiency Measured at ECO level at highest flow rate, maxi-
mum output and maximum set value.
Measured at ECO level at highest flow rate and
maximum set value
Daily power consumption kWh 2,184 2,177