Adapting The Appliance To The Heating System 6; Setting Partial-Load Heating - Vaillant ecoMAX 646 Installation And Maintenance Manual

6 Adapting the appliance to the
heating system
6.1

Setting partial-load heating

The appliances are set in the factory to the thermal load
shown in table 6.1. If you want to set a different load,
proceed as follows:
• Press the "i" and "+" keys simultaneously.
• Continue to hold the "+" key down until "d.0" appears
in the display.
The display runs from "d.0" through to "d.99" and starts
again at "d.0".
• Press the "i" key.
The "=" symbol appears in the display. Then the set par-
tial load is displayed in kW.
• By pressing the "+" or "-" keys you can now increase
or decrease the value in 1 kW increments.
The displayed value flashes during the setting proce-
dure. The possible setting ranges are to be found in
table 6.1.
Installation and maintenance manual ecoMAX 646

Adapting the appliance to the heating system 6

• Then hold down the "i" key for approx. 5 s until the
display no longer flashes.
The value is now saved. The standard display appears
again in the display (current heating supply temperature,
e.g. 45 °C).
• Quit the setting mode by pressing the "i" and "+" keys
simultaneously.
The setting mode is also quit if you do not touch a key
for 4 minutes.
Appliance type
ecoMAX 646
Table 6.1 Setting range for partial-load heating
Setting range Factory setting
in kW in kW
12 - 45 35
23