Checking The External Lpg Safety Valve (If Installed) 36. Matching The Control Unit To The Heating System - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Further details regarding the individual steps
Selecting the upper/lower output for
weather-compensated control units:
1. Press OK and simultaneously for
approx. 4 s.
2. "Actuator test"
3. Select the lower output:
Select "Base load" "ON" and con-
firm with OK.
4. Select the upper output:
Select "Full load" "ON" and confirm
with OK.
Selecting the upper/lower output for
constant temperature control units:
1. Press OK and å simultaneously
for approx. 4 s.
"Ü" flashes on the display.
Matching the control unit to the heating system
Subject to the equipment level, the control unit must be matched to the system. Var-
ious system components are recognised automatically by the control unit and the
relevant codes are adjusted automatically.
■ For the selection of an appropriate scheme, see the following diagrams.
■ For coding steps, see page 61.
Commissioning, inspection, maintenance
(cont.)
2. Select Ú " " and confirm with OK.
The display shows "I" and "on"
flashes.
3. Select the lower output:
Press OK, "on" will be displayed per-
manently.
4. Select the upper output:
Press ä.
5. Select "2" with Ú and confirm with
OK.
6. Exit output selection with ä.
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