Viessmann Vitomax LW Operating And Service Instructions page 28

Operating conditions
Operating conditions
1. Heating water flow rate
2. Boiler return temperature
(minimum value)
Gas operation:
■
Oil operation:
■
3. Minimum flow temperature
4. Max. temperature spread
Gas operation:
■
Oil operation:
■
5. Stepped burner operation
6. Modulating burner operation
7. Reduced mode
Single boiler system
Multi boiler system
Lead boiler
■
Lag boiler
■
Weekend setback
Tab. 13
Note
Boiler types M82 and M84 can also be operated with
fuel oil S (heavy fuel oil).
Boiler type M64 can be operated with fuel oil S follow-
ing conversion (option incurs additional charge).
Note
For combustion of heavy fuel oil to DIN 51603-5, the
average boiler water temperature must be at least
90 °C.
28
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Vitomax M148
LW with
Vitotrans
100-LW/
200-LW
No minimum heating water flow rate required
65 °C
65 °C
70 °C
40 K
40 K
Operation with minimum flow temperature
Operation with minimum flow temperature
Lag boilers can be shut down
M62C M64B
Requirements/notes
55 °C
50 °C
70 °C
50 K
50 K
None
None
See reduced mode
Boiler datasheet
See chapter "Standard values for water quality"
on page 11
M82A M84B