Select Appropriate Gas Type; Measure Static Pressure And Running Pressure - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Steps
(continued)
S
Start-up and Maintenance
ervice
The Vitodens 100-W boiler is for use with gases whose characteristics fall within the following ranges. Do not use any
other types of gas.
Heating value (gross)
Specific gravity
Ultimate carbon dioxide (CO
S
Start-up and Maintenance
ervice
D
A B
C
Fig. 45
Legend
A Inlet gas pressure measurement
port
B Outlet pressure port
C Low-fire adjustment screw / cover
D Hi-fire adjustment screw

3. Select appropriate gas type

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 83.
3
Btu/ft
) %
2

4. Measure static pressure and running pressure

Static pressure
1. To measure static and/or running
pressure remove burner cover panel
as per the removal and reinstallation
instructions on page 56 and 61 in
these instructions.
2. Close gas shutoff valve.
3. Loosen screw in test nipple A on
the gas combination valve, do not
remove completely. Connect
calibrated manometer.
4. Open the gas shutoff valve.
5. Measure static pressure. Values
must be:
H 14 "w.c. max. for NG
H 14 "w.c. max. for LP
6. Enter measured value into
Maintenance Record on page 83 in
this manual.
7. Start up boiler, using the on/off
service switch (field supplied).
Initial Start-up, Inspection and Maintenance
Natural gas
970 to 1100
0.57 to 0.70
11.7 to 12.2
IMPORTANT
A CO measurement (see page 50)
2
must be taken before and after working
on gas appliances to eliminate health
risks and to guarantee the satisfactory
condition of the system.
IMPORTANT
The burner is automatically ignited and
starts operation after a safety time has
elapsed.
During initial start-up, the unit may
indicate a fault F4 because of air in the
gas supply pipe. After fault F4 is
displayed, reset the burner (see page
66). The ignition procedure is repeated.
This boiler employs a direct spark
ignition system with 3 trials for
ignition.
Propane gas
2466 to 2542
1.522 to 1.574
13.73 to 13.82
47