KRAL DL3 Series, Operating Instructions Manual, Page: 47 / 60

15 Accessories
15.2 Heating
15.2.2 Electrical heating system/fluid heating system
3
5
30
1
6
48
481 481
2
2
242 242 493 070.1
914.1
484
R 3/8"
730.2
908.2
242
R 1/2"
908.2
493 070.1
161 915.4
915.4 161
242
242
242
1
1
Fig. 13: Electrical heating system/fluid heating system (figure left DS1, figure right DS3, DS4)
1 Control block 484 Terminal strip
2 Heating duct (fluid heating system) 493 Screwed gland
070.1 End cover 730.2 Flat gasket
161 Heat conducting plate 908.2 Screw plug
242 Heating block 914.1 Socket screw
481 Heating element (electrical heating system) 915.4 Socket screw
The combined electrical heating system/fluid heating system consists of a heating block 242 , that is in-
stalled with socket screws 915.4 at the control block 1 . The heating takes place optionally with a heat-
ing element 481 and/or heating liquid that follows through the heating duct 2 . The heat transfer takes
place via the heat conducting plates 161 . The output of the heating element corresponds to the radi-
ation losses and convection losses of the pump in the required temperature range so that overheating
is not possible.
15.2.3 Operating data
Parameter Unit Series
DS1 DS3 / DS4
Voltage [V] 230
Frequency [Hz] 50/60
Wire cross-section [mm
2
] 2 x 1
Heating output [W] 180 250
Tab. 17: Operating data electrical heating system
15.2.4 Heating-up period
Electrical heating system
Required heating-up period for temperature differences of 20 °C or 50 °C:
Series Wattage Heating-up period [min] at a temperature difference of
[W] 20 °C 50 °C
DS1 1 x 180 60 180
DS3, DS4 1 x 250 120 240
Tab. 18: Heating-up period for electric heating system
Operating instructions OID 06en-GB Edition 2019-11 47