Vaillant ecoMAX 646 Installation And Maintenance Manual

Also see for ecoMAX 646: Instructions for use Installation and maintenance manual

Vaillant ecoMAX 646 Installation And Maintenance Manual Manual pdf 25 page image

25Installation and maintenance manual ecoMAX 646 / 0020020158_02Adapting the appliance to the heating system 66.2 Setting the pump over-run timeThe pump over-run time for the heating mode is set to5 minutes (default). It can be varied within a range from1 minute to 60 minutes or be in “continuous” mode.In order to change the pump over-run time, proceed asfollows:• Pull the front panel of the appliance outwards.• Switch the appliance main switch to the “l” position.• Press the “i” and “+” keys simultaneously and holddown the “+” key until “d.1” appears in the display.• Press the “i” key.The current pump run-out time in minutes appears inthe display.• By pressing the “+” or “-” keys you can now increaseor decrease the value.To set the pump mode “continuous”, do not enter anumber, rather select the symbol “--” with the “+” or“-” key.• Hold down the “i” key for about 5 seconds until thedisplay stops flashing.The value is now saved.• Quit the setting mode by pressing the “i” and “+”keys simultaneously.The standard display appears again in the display(current heating supply temperature, e.g. 45 °C).The setting mode is also quit if you do not touch a keyfor 4 minutes.6.3 Setting the burner anti-cycling timeIn order to avoid frequent switching on and off of theburner (energy loss), an electronic block preventing itbeing switched on after switching off, for a pre-deter-mined time. The burner anti-cycle time can be adjustedto fit the characteristics of the heating system.The burner anti-cycle time is only activated for theheating mode. Hot water operation during a burner anti-cycle time in progress does not affect the timer.The maximum burner anti-cycle time can be set underdiagnosis point d.2 between 2 and 60 minutes (factorysetting: 20-minutes). The anti-cycle time effective ineach case is then automatically calculated from thecurrent set supply temperature and the set maximumburner anti-cycle time.The timer can be reset or deleted by pressing the appli-ance on/off switch. The burner anti-cycle time remain-ing in the heating mode after a control shutdown canbe viewed under diagnosis point d.67.In order to change the lockout time, proceed as follows:• Pull the front panel of the appliance outwards.• Switch the appliance main switch to the “l” position.• Press the “i” and “+” keys simultaneously and holddown the “+” key until the diagnosis code “d.2”appears in the display.• Press the “i” key.The symbol “=” now appears in the display and thenthe current burner lockout time in minutes.• By pressing the “+” or “-” keys you can now increaseor decrease the value in 1 minute increments.The displayed value flashes during the setting proce-dure.• Hold down the “i” key for about 5 seconds until thedisplay stops flashing.The value is now saved.• Quit the setting mode by pressing the “i” and “+”keys simultaneously.The standard display appears again in the display(current heating supply temperature, e.g. 45 °C).The setting mode is also quit if you do not touch a keyfor 4 minutes.