Match The Control Unit To The System Type; Check Outputs (Actuators) And Sensors - Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual

Start-up
Steps
(continued)

7. Match the control unit to the system type

8. Check outputs (actuators) and sensors

Relay test
68
Set the following coding addresses in
Coding 2:
"00" System type
"02" Burner type
"03" Oil or gas-fired operation
"0C" Return temperature raising
"4C" Plug sÖ function
"4d" Plug sL function
"4E" Plug gS function
Carry out relay test
1. Press and simultaneously for
approx. 2 seconds.
2. Select relay outputs with the
button.
3. Press .
The following relay outputs can be
selected depending on the system
equipment installed:
Burner stage 1 ON
Burner stage 1 + 2 ON
Burner modulation open
Burner modulation neutral
Burner modulation closed
Output 20 ON
Output 29 ON
Output 52 open/closed/neutral
DHW tank pump ON
DHW circulation pump ON
Heating circuit pump (M2) ON
Heating circuit pump (M3) ON
Mixing valve (M2) Open
Mixing valve (M2) Closed
Mixing valve (M3) Open
See page 116 for coding 2.
Relay test is activated.
or
Relay test is terminated.
Mixing valve (M3) Closed
Central fault indicator ON
LED selector button ! illuminated.
LED selector button ! illuminated.
LED selector button ! illuminated.
LED selector button ? illuminated.
LED selector button § illuminated.
LED selector button ? illuminated.
LED selector button ? illuminated.
LED selector button § illuminated.
LED selector button § illuminated.
All LEDs extinguished.