Viessmann B2TF Installation And Service Instructions Manual page 75

Checking outputs (actuator test)
The following actuator functions can be controlled subject to the system equipment level:
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 1 pump
speed
Heating circuit 2 pump
speed
Heating circuit 3 pump
speed
Heating circuit 4 pump
speed
*2
Mixer HC2
Mixer HC3
Mixer HC4
*2
DHW group
Primary circuit pump,
set speed
3-way valve target posi-
tion
Circulation pump for cyl-
inder heating
DHW circulation pump
Group Solar (not for Vitodens 222-W)
(only Vitodens 200-W, type B2HF with 7 inch screen)
*2
(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 3-way diverter valve set to heating mode
Middle 3-way diverter valve in central position (filling/draining)
DHW 3-way diverter valve set to DHW heating
Set value Internal circulation pump speed in %
Heating 3-way diverter valve set to heating mode
Middle 3-way diverter valve in central position (filling/draining)
DHW 3-way 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 for "Mixer close" enabled
Open Output for "Mixer open" enabled (mixer extension kit)
Stop Current position is maintained
Close Output for "Mixer close" enabled
Open Output for "Mixer open" enabled (mixer extension kit)
Stop Current position is maintained
Close Output for "Mixer close" enabled
Set value Internal circulation pump in %
Heating 3-way diverter valve set to heating mode
Middle 3-way diverter valve in central position (filling/draining)
DHW 3-way diverter valve set to DHW heating
On
Off
On
Off
Diagnosis and service checks
75