ES3, ES4 & ES6 Instructions. V1.06 Page 5 August / 2014
Technical data
Model ES3 ES4 ES6
Nominal supply voltage 1/N/PE 230 V~
Power rating (kW) 2.8 4.4 5.5
Rated Current (A) 12 19 24
Element type Bare wire
Rated pressure 1 MPa (10 bar)
Factory set temperature
(1)
38°C
Temperature adjustment range 30°C - 43°C
Maximum inlet temperature 70°C
Factory set ow rate @ 3 bar (l/min)
2.0 2.5 3.3
Switch on ow rate (l/min) 1.2 1.5
Switch off ow rate (l/min) 1.0 1.3
Flow rate @ 38°C (l/min)
(2)
1.5 2.4 3.0
Minimum differential pressure @ 38°C
0.020 MPa 0.045 MPa 0.065 MPa
(0.20 bar) (0.45 bar) (0.65 bar)
Required specic water resistance @ 15°C >1300 ohm.cm >800 ohm.cm
Dimensions H x W x D (mm) 135 x 186 x 87
Maximum weight (kg) 1.5
Rated volume (litres) 0.2
Water connections (BSP) 1/2”
Protection class IP25
(1)
Subject to incoming water temperature, ow rate and power available.
(2)
Based on 12°C supply temperature, 3 bar dynamic pressure and 230V supply.
All data quoted at nominal supply voltage. Standard European voltage tolerances of -6% to + 10%
may be applied.
A minimum water presure of 0.2 MPa (2 bar) is recommended for optimum performance.
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