Designating The Heating Circuits; Checking The Gas Type - Viessmann VITODENS 242-F Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Designating the heating circuits

In the delivered condition, the heating
circuits are designated "Heating circuit
1", "Heating circuit 2" and "Heating
circuit 3" (if installed).
If the system user prefers, the heating
circuits can be designated differently to
suit the specific system.

Checking the gas type

The boiler is equipped with an electronic
combustion controller that adjusts the
burner for optimum combustion in
accordance with the prevailing gas qual-
ity.
■ For operation with natural gas no
adjustment is therefore required
across the entire Wobbe index range.
The boiler can be operated in the
Wobbe index range 9.5 to
3
15.2 kWh/m (34.2 to 54.7 MJ/m
■ For operation with LPG the burner
must be converted (see "Gas type
conversion" on page 53).
52
Enter names for heating cir-
cuits:
Operating instructions
1. Determine the gas type and Wobbe
index by asking your local gas supply
utility or LPG supplier.
2. For operation with LPG, convert the
burner (see page 53).
3. Record the gas type in the report on
page 193.
3
).
(cont.)