Setting The Pump Run-Out Time; Setting The Pump Output; Setting The Pump Output With Direct Feeding; Setting The Pump Output With Hydraulic Decoupling - Vaillant ecoMAX 646 Installation And Maintenance Manual

6 Adapting the appliance to the heating system
6.2

Setting the pump run-out time

The pump run-out time for the heating mode is set to
5 minutes in the factory. It can be varied within a range
from 1 minute to 60 minutes or be in "continuous" mode.
In order to change the pump run-out 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 hold
down the "+" key until "d.1" appears in the display.
• Press the "i" key.
The current pump run-out time in minutes appears in
the display.
• By pressing the "+" or "-" keys you can now increase
or decrease the value.
To set the pump mode "continuous", do not enter a
number, rather select the symbol "--" with the "+" or "-"
key.
• Hold down the "i" key for about 5 seconds until the
display 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 (cur-
rent heating supply temperature, e.g. 45 °C).
The setting mode is also quit if you do not touch a key
for 4 minutes.
6.3

Setting the pump output

6.3.1

Setting the pump output with direct feeding

The operating mode of the pump is factory set to "auto"
(diagnosis point d.14 = 0).
6.3.2 Setting the pump output with hydraulic
decoupling
Proceed as described in chapter 4.2.2.
6.4

Setting the burner lockout time

In order to avoid frequent switching on and off of the
burner (energy loss), an electronic block on it switching
back on is activated for a certain time after every time it
has been switched off. The burner lockout time can be
adjusted to fit the characteristics of the heating system.
The burner lockout time is only activated for the heating
mode. Hot water operation during a burner lockout time
in progress does not affect the timer.
The maximum burner lockout time can be set under di-
agnosis point d.2 between 2 and 60 minutes (factory
setting: 20-minutes). The lockout time effective in each
case is then automatically calculated from the current
set supply temperature and the set maximum burner
lockout time.
The timer can be reset or deleted by pressing the appli-
ance main switch. The burner lockout time remaining in
24
the heating mode after a control shutdown can be
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 hold
down the "+" key until the diagnosis code "d.2" ap-
pears in the display.
• Press the "i" key.
The symbol "=" now appears in the display and then the
current burner lockout time in minutes.
• By pressing the "+" or "-" keys you can now increase
or 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 the
display 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 key
for 4 minutes.
Installation and maintenance manual ecoMAX 646