Checking The Flue System For Unrestricted Flow And Tightness 32. Matching The Control Unit To The Heating System; Checking The External Lpg Safety Valve (If Installed) 34. Adjusting The Heating Curves (Only For Weather-Compensated Control Units) - Viessmann VITODENS 200-W B2HA Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Checking the combustion quality
Select higher/lower heating output
Weather-compensated control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. "Actuator test"
3. Select the lower heating output:
Select "Base load OFF". Then "Base load ON" ap-
pears and the burner operates at its lower heating
output.
4. Select the upper heating output:
Select "Full load OFF". Then "Full load ON" ap-
pears and the burner operates at its upper heating
output.
5. Ending output selection:
Press .
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Checking the flue system for unrestricted flow and tightness
Matching the control unit to the heating system
The control unit must be matched to the equipment
level of the system. Various system components are
recognised automatically by the control unit and the
relevant codes are set automatically.
Checking the external LPG safety valve (if installed)
Adjusting the heating curves (only for weather-compensated control units)
The heating curves illustrate the relationship between
the outside temperature and the boiler water or flow
temperature.
To put it simply, the lower the outside temperature, the
higher the boiler water or flow temperature.
The boiler water or flow temperature in turn affects the
room temperature.
Settings in the delivered condition:
■ Slope = 1.4
Level = 0
■
48
(cont.)
Constant temperature control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. Select " " with and confirm with OK.
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The display shows "I" and "ON" flashes.
3. Select the lower heating output:
Press OK, "ON" will be displayed constantly.
4. Select the upper heating output:
Press .
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5. Select "2" with ; "ON" flashes.
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6. Press OK, "ON" will be displayed constantly.
7. Ending output selection:
Press .
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For individual coding steps, see page 54.
Note
If the heating system includes heating circuits with mix-
ers, then the flow temperature of the heating circuit
without mixer is higher by a selected differential (8 K in
the delivered condition) than the flow temperature of
the heating circuits with mixers.
The differential temperature is adjustable via coding
address "9F" in the "General" group.