Electrical Board Layout - Vaillant ecoTEC plus Instructions For Installation And Servicing

4.4.3 Electrical board layout

Fig. 4.9 Connection wiring
Instructions for installation and servicing ecoTEC plus / 0020020828_05
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X12
Boiler installation sequence 4
eBUS accessory connection
Burner cable harness
Accessory module connection
Diagnosis via eBUS
vrnet DIALOG
ext. flow or return probe
outer probe
ext. flow or return probe
Hydraulic cable harness
Connection for external
eBUS controller
Room thermostat 24V:
Connection 7, 8 and 9
No bi-directional
interface (analogue only)
Mains supply: 230V / 50Hz
Room thermostat 230V / 50Hz
(remove bridge on connection)
Heating pump
2A fuse, slow
Igniter
Connection: 230V
Supply for accessory module
Caution:
Do not connect
supply voltage!
Risk of damage
to electronics!
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