STIEBEL ELTRON PER 18/21/24 - Specifications and Data; Sizing the Pipework; Energy Consumption Data; Data Tables

20 | PER 18/21/24 www.stiebel-eltron.com
INSTALLATION | GUARANTEE | ENVIRONMENT AND RECYCLING
Specication
Sizing the pipework
When calculating the size of the pipework, an appliance pressure
drop of 0.1MPa is recommended.
15.7 Fault conditions
In the event of a fault, loads up to a maximum of 95 °C at a pressure
of 1.2MPa can occur temporarily in the installation.
15.8 Details on energy consumption
The product data complies with EU regulations relating to the Di-
rective on the ecological design of energy related products (ErP).
PER 18/21/24
233990
Manufacturer STIEBEL ELTRON
Load profile S
Energy efficiency class A
Annual power consumption kWh 479
Energy conversion efficiency % 39
Default temperature setting °C 60
Sound power level dB(A) 15
Special information on measur-
ing efficiency
Data at Pmax.
15.9 Data tables
PER 18/21/24
233990
Electrical data
Rated voltage V 380 400 415
Rated output kW 16.2/19/21.7 18/21/24 19.4/22.6/25.8
Rated current A 27.6/29.5/33.3 29/31/35 30.1/32.2/36.3
MCB/fuse rating A 32/32/35 32/32/35 32/32/40
Phases 3/PE
Frequency Hz 50/60 50/60 50/-
Max. mains impedance at 50Hz Ω 0.284 0.270 0.260
Specific resistance ρ
15
≥ (at
ϑcold ≤ 25°C)
Ω cm 900 900 1000
Specific conductivity σ
15
≤ (at
ϑcold ≤25°C)
μS/cm 1111 1111 1000
Specific resistance ρ
15
≥ (at
ϑcold ≤45°C)
Ω cm 1200 1200 1300
Specific conductivity σ
15
≤ (at
ϑcold ≤45°C)
μS/cm 830 830 770
Connections
Water connection G 1/2 A
Application limits
Max. permissible pressure MPa 1
Max. inlet temperature for re-
heating
°C 45
Values
Max. permissible inlet tempe-
rature
°C 60
On l/min >2.5
Flow rate for pressure drop l/min 5.2/6.0/6.9
Pressure drop at flow rate MPa 0.08/0.1/0.13
DHW delivery l/min 9.4/11.0/12.6
Δϑ on delivery K 26
Hydraulic data
Nominal capacity l 0.4
Versions
Connected load adjustable X
Temperature setting range °C 30-60
Insulating block Plastic
PER 18/21/24
Heating system heat generator Bare wire
Cover and back panel Plastic
IP rating IP25
Dimensions
Height mm 485
Width mm 226
Depth mm 93
Weights
Weight kg 3.8
Mini FFB
Dimensions (H/W/D) excluding
wall mounting bracket
mm 50/50/17
Radio frequency MHz 868.3
Range inside a building incl. one
separating ceiling
m approx. 25
Temperature setting range °C 30-60
IP rating to EN60529 Shower
Bath
IP X5
IP X7
Battery type CR 2032
Guarantee
The guarantee conditions of our German companies do not
apply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products a guarantee can only
be issued by those subsidiaries. Such guarantee is only grant
-
ed if the subsidiary has issued its own terms of guarantee. No
other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in
countries where we have no subsidiary to sell our products.
This will not aect warranties issued by any importers.
Environment and recycling
We would ask you to help protect the environment.
After use,
dispose of the various materials in accordance with national
regulations.
GUARANTEE
ENVIRONMENT AND RECYCLING