Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 109

Gas condensing module
The following actuator functions can be controlled depending on the system equipment:
Display
Gas condensing boiler group
Fan speed
Burner modulation, set
value
3-way valve target posi-
tion
Heating group
Primary circuit pump
speed
3-way valve target posi-
tion
Heating circuit pump 1
speed
Heating circuit pump 2
speed
Heating circuit pump 3
speed
Heating circuit pump 4
speed
Mixer HC 2
Mixer HC 3
Mixer HC 4
Group DHW
Primary circuit pump
speed, set value
Gas condensing boiler
3-way valve
Circulation pump for cyl-
inder heating
DHW circulation pump
Fuel cell group
(cont.)
Explanation
Set value Burner fan speed in rpm (rotations/minute)
Off Modulation level (in accordance with specific heat generator settings)
■
Minimum
■
heating out-
put
Maximum
■
heating out-
put
Maximum
■
DHW output
Heating Diverter valve set to heating mode
Middle Diverter valve in central position (filling/draining)
DHW Diverter valve set to DHW heating
Set value Internal circulation pump speed in %
Heating Diverter valve set to heating mode
Middle Diverter valve in central position (filling/draining)
DHW Diverter valve set to DHW heating
Set value Speed, heating circuit pump, heating circuit 1 without mixer in %
Set value Speed, heating circuit pump, heating circuit 2 with mixer in %
Set value Speed, heating circuit pump, heating circuit 3 with mixer in %
Set value Speed, heating circuit pump, heating circuit 4 with mixer in %
Open Output for "Mixer open" enabled (mixer extension kit)
Stop Current position is maintained.
Close Output "mixer close" active
Open Output for "Mixer open" enabled (mixer extension kit)
Stop Current position is maintained.
Close Output "mixer close" active
Open Output for "Mixer open" enabled (mixer extension kit)
Stop Current position is maintained.
Close Output "mixer close" active
Set value Internal circulation pump in %
Heating Diverter valve set to heating mode
Middle Diverter valve in central position (filling/draining)
DHW Diverter valve set to DHW heating
On
Off
On
Off
Diagnosis and service checks
109