Nibe EKS 500 L User's And Installer's Manual page 24

Pipe connections
EKS 500
Pipe dimensions
Connection
XL3 Cold water connection
XL4 Hot water connection
XL5 HWC connection
XL12 Drain connection
XL35 Connection for immersion heaters
XL41 HWX connection
XL54 Connection for thermometer, pressure gauge, thermostat
24
EKS 750
XL41
XL54
XL5
XL54
XL35
XL12
XL4
XL3
EKS 1000
XL41
XL54
XL5
XL54
XL35
XL12
XL3
XL4
EKS 500, 750, 1000 L | GB
XL41
XL54
XL5
XL54
XL35
XL12
XL3
XL4
G50
G50
G20
Ø 22 mm
G50
G32
G15