Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 62

Commissioning, inspection, maintenance
Checking the static pressure and supply pressure
On the gas condensing module
D
B
Fig. 55
01. Swivel off control unit enclosure
02. Remove cover panel
03. Close gas shut-off valve
04. Loosen the screw in test connector
gas train but do not remove it. Connect the pres-
sure gauge.
05. Open gas shut-off valve
06. Measure the static pressure and record the value
in the report on page 200.
Set value: Max. 30 mbar (3.0 kPa).
07. Switch ON the gas condensing module ON/OFF
switch.
Note
During commissioning, the appliance can enter a
fault state because of airlocks in the gas line.
Reset the burner after approx. 5 s (see operating
instructions).
62
A
. See page 34.
A
B .
.
C
"IN" on the
D
.
C
C
08. Check the supply (flow) pressure.
Set value: 20 mbar (2.0 kPa)
If the set value is exceeded, take steps according
to the table on page 63.
Note
Use a suitable measuring device with a resolution
of at least 0.1 mbar (0.01 kPa) to check the supply
pressure.
09. Record the actual value in the report on
page 200.
10. Shut down the appliance and close the gas shut-
off valve. Remove the pressure gauge and tighten
the screw in test connector
11. Open the gas shut-off valve and start the appli-
ance.
Danger
Gas escaping from the test connector leads
to a risk of explosion.
Check test connector
12. Fit cover panel
(cont.)
.
D
for gas tightness.
D
.
B