Connection Diagram - Vaillant ecoMAX 646 Installation And Maintenance Manual

4.8.4 Connection diagram

Fig. 4.15 Connection diagram ecoMAX 646
Installation and maintenance manual ecoMAX 646 / 0020020158_02
Diagnostics
PWM pump signal
Connection accessory box 306 248
and multi-function module 306 253 (1 of 5)
or multi-function module 306247 (2 of 6)
edge connector is included with the weather compensator
sensor for circulation pump/
FB - sensor for underfloor-heating system
AF - outside temperature sensor
RF - flow or return sensor
(DCF)
0
0
Safety circuit 20V connection
Vaillant controllers 24 V: connections 7, 8 and 9
Caution: Do not connect supply voltage!
Risk of electronics being destroyed!
Mains supply: 230 V/50 Hz
Room thermostat 230 V/50 Hz
(remove bridge on connection)
Connection 230 V/50 Hz fan
Boiler integral pump
Connection storage charging pump
Use of other functions via
module 1 of 5 (306 253) or
module 2 of 6 (306 247)
Installation 4
Sensor
for low
loss
header
17