Viessmann WB2-44 - Page 13

Initial Start-up and ServiceInitial Start-up and Service
13
Steps (continued)
Initial start-up
5. Select appropriate gas type
Service
The Vitodens 200 boiler is for use with
gases whose characteristics fall within
the following ranges. Do not use any
other types of gas.
1. Ensure that the fuel type listed on
the boiler rating plate is the correct
type for the installation being
attempted.
2. Record fuel type in Maintenance
Record on page 70.
Natural gas Propane gas
Heating value (gross) Btu/ft
3
970 to 1100 2466 to 2542
Specific gravity 0.57 to 0.70 1.522 to 1.574
Ultimate carbon dioxide (CO
2
) % 11.7 to 12.2 13.73 to 13.82
6. Measure static pressure and running pressure
Initial start-up Service
Static pressure
1. To measure static and/or running
pressure remove burner cover panel
as per the removal and reinstallation
instructions on page 7 in these
instructions.
2. Close gas shutoff valve (field
supplied).
3. Loosen screw in test nipple ”PE” A
on the gas combination valve, do not
remove completely. Connect
manometer.
4. Open the gas shutoff valve.
5. Measure static pressure. Values
must be:
H 14“w.c.max.forNG
H 14“w.c.max.forLP
6. Enter measured value into
Maintenance Record on page 70 in
this manual.
7. Start up boiler, using the on/off
switch on the boiler control.
A CO measurement (see page 16 must
be taken before and after working on
gas appliances to eliminate risks to
health and to guarantee the
satisfactory condition of the system.
The burner is automatically ignited and
starts operation after a safety time has
elapsed.
During initial start-up, the unit may
indicate a fault because of air in the gas
supply pipe (especially for propane gas).
After approx. 5 seconds, press the ”EU”
button to reset the burner. The ignition
procedure is repeated. This boiler
employs a direct spark ignition system.
5285 961 v1.3
PE
A
Measuring static gas supply pressure,
using test nipple “PE”
inlet
outlet
IMPORTANT
IMPORTANT