Vaillant ecoMAX 646 Installation And Maintenance Manual - page 16
Installation and maintenance manual ecoMAX 646 / 0020020158_02
16
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230V
5
Fig. 4.14 Example of cable insertion
• Then insert the connecting cables (5) into the elec-
tronics box and cut them to length.
• Strip the connecting cable by about 2-3 cm and bare
the wires.
• Connect the connecting cables to the corresponding
ProE plug or terminal..
Caution!
Do not connect the mains voltage supply to
terminals 7, 8, or 9. The electronics could be
destroyed by this!
• If no room/clock thermostat is in place, provide a
jumper between terminals 3 and 4 if not already
present. Remove the jumper if a room/clock thermo-
stat is connected to terminals 3 and 4.
• When connecting a weather-controlled temperature
controller or room temperature controller (continuous
controlling - terminals 7,8,9), the jumper between ter-
minals 3 and 4 must remain in place.
• Close the rear cover of the electronics box and press
it in until you hear it click into place.
• Lift up the electronics box and press it by the two
clips on its left and right against the lateral appliance
casings until you hear the clips click into place.
• Attach the front casing.
• In order to attain pump mode I (continuous pump) for
the multicircuit controller (e.g. VRC 630), increase the
pump run-out time to 15-20 minutes (diagnosis point
d.1, see chapter 6.2).
4.8.3 Connecting accessories and external system
components
The Vaillant ProE (plug in terminal connections) system
facilitates a quick and trouble-free connection of acces-
sories and external system components to the appliance
electronics. Proceed with the wiring up as follows:
• Take off the front casing of the appliance and lift the
electronics box forward.
• Unclip the back cover of the switch box (1) from its fix-
ings (2) and lift it up.
• Guide the connecting cables of each of the compo-
nents to be connected through the PG screw connec-
tions (4) located on the bottom of the appliance to
the left.
• Then insert the connecting cables (5) into the elec-
tronics box and cut them to length.
• Strip the connecting cable by about 2-3 cm and bare
the wires.
• Connect the connecting cables to the corresponding
ProE plugs or slots of the electronics.
Please note that the jumper on the ProE plug should
be removed when connecting a maximum thermostat
(feed thermostat) for floor heating. Should a remote
safety circuit for a mini pressurisation device or a pump
flow switch. This will prevent the boiler firing should
such an external device fail.
• Close the rear cover of the electronics box and press
it in until you hear it click into place.
• Lift the electronics box up and press it by the two
clips on its left and right against the lateral appliance
casings until you hear the clips click into place.
• Attach the front casing.
4 Installation