Nibe EKS 500 L User's And Installer's Manual page 22

Electrical installation
NOTE
Electrical installation and service must be carried
out under the supervision of a qualified electri-
cian, and in accordance with applicable electrical
safety regulations.
EKS 500 has two immersion heater connections for a
maximum output of 2 x 9 kW. A separate supply from
group central is routed to each immersion heater.
EKS 750 and EKS 1000 have three immersion heater
connections for a maximum effect of 3 x 9 kW. A separ-
ate supply from group central is routed to each immer-
sion heater.
Each immersion heater is supplemented with junction
box type K11 (2-pole thermostat, 3-pole temperature
limiter).
Do not modify or reconnect.
NOTE
The water heater must be completely filled with
water before it is switched on.
22 EKS 500, 750, 1000 L | GB