Viessmann Vitodens 222-F B2TA series, Installation And Service Instructions Manual, Page: 119 / 196

119
Constant temperature control unit
1. Press OK and
å
simultaneously for
approx. 4 s.
"
Ü
" flashes on the display.
2. Select " " with
Ú
and confirm with
OK .
3. Select required actuator (output) with
V
/
v
(see following table):
4. Confirm selected actuator with OK .
The display shows the number for the
activated actuator and
"ON" .
The following actuators (relay outputs) can be controlled subject to system
design:
Display
Explanation
0 All actuators are off
1 Burner operates at minimum output; internal pump starts
2 Burner operates at maximum output; internal pump starts
3
Internal output
sÖ
active (internal circulation pump)
4 Diverter valve set to heating mode
5 Diverter valve in central position (filling/draining)
6 Diverter valve set to DHW mode
10 Internal extension output enabled
19 Contact P - S at plug
aBJ
of extension EA1 closed
20 Output A1 at extension AM1 enabled
21 Output A2 at extension AM1 enabled
22 Internal output sA active (only if circulation pump is connected)
Diagnosis and service scans
Checking outputs (actuator test)
(cont.)
5773 216 GB
Service