
26
Electric Tankless Instant Water Heater -
Installation Manual and User Guide
EN
Technical Specifications
Technical specifications
Single-Phase Comfort Series Elex 15
Elex 18
Elex 21
Electric supply
220-240V ~ 50Hz
220-240V ~ 50Hz
220-240V ~ 50Hz
Nominal power rating
15 kW
18 kW
21 kW
Nominal current
(2) 33 A
(2) 39 A
(2) 46 A
Earth leakage circuit breaker
(2) 2-POLE 40A
(2) 2-POLE 40A
(2) 2-POLE 50A
Cable size
(2) 4�0 mm
2
(2) 4�0 mm
2
(2) 6�0 mm
2
Resistivity of the water supply
≥ 1300 Ω•cm
≥ 1300 Ω•cm
≥ 1300 Ω•cm
Flow rate (Δt=25°C)
8�5 L/min
10�2 L/min
11�9 L/min
Flow rate (Δt=35°C)
6�0 L/min
7�2 L/min
8�5 L/min
Heating system
Bare element
Bare element
Bare element
Temperature range
35 - 60 °C
35 - 60 °C
35 - 60 °C
Switch on flow rate
2�5 L/min
2�5 L/min
2�5 L/min
Non-usage consumption
< 1Wh/h
< 1Wh/h
< 1Wh/h
Protection class
IP25
IP25
IP25
Unit dimensions
477x257x125mm
477 x 257 x 125 mm
477 x 257 x 125 mm
Unit weight
4�2 kg
4�2 kg
4�2 kg
Water connections
G1/2"
G1/2"
G1/2"
Max� inlet water pressure
1�0 MPa
1�0 MPa
1�0 MPa
Min� inlet water pressure
0�1 MPa
0�1 MPa
0�1 MPa
Switch on flow pressure
0�1 MPa
0�1 MPa
0�1 MPa