Appendix
0020265768_01 eloBLOCK Installation and maintenance instructions
25
F.2
VE18 /14 EU I, VE21 /14 EU I wiring diagram
6
7
8
9
14
17
18
20
21
27
26
19
15
16
1
2
4
5
13
12
11
10
3
22
23
24
25
1
Connection terminal N
2
18 kW (3 x 6 kW), 21 kW (3 x 7 kW) immersion
heaters
3
Limit thermostat for underfloor heating (remove the
bridge when connecting)
4
Power supply
–
main connection block
5
Contactor 1
6
Power supply for external VR 40 module
7
Safety cut-out
8
Heating pump
9
Connection for 3-port diverter valve
10
RE 14
–
relay for heating pump
11
RE 15
–
3-port diverter valve
12
RE 16
–
relay for contactor
13
RE 13
–
relay for two-stage pump (non-EU)
14
Cylinder temperature sensor
15
Cylinder thermostat
16
Output limiter
17
Room temperature control
18
eBUS connection
19
Pressure sensor
20
Temperature sensor
21
Signal connection for external VR 40 module
22
DCF 77
23
System temperature sensor
24
Outdoor temperature sensor
25
Circulation pump remote control
26
Contactor 2
27
User interface connection
