Viessmann C3TB, Installation And Service Instructions For Contractors

Page: 63 / 188

63
In the delivered condition, the heating circuits are des-
ignated
"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.
Enter names for heating circuits:
Operating instructions
Checking the static pressure and supply pressure
Danger
CO formation as a result of incorrect burner
adjustment can have serious health implications.
Always carry out a CO test before and after
work on gas appliances.
On the gas condensing module
A
Fig. 63
1. Close the gas shut-off valve.
2. Undo the screw in test connector "PE"
A
on the
gas train but do not remove it. Connect the pres-
sure gauge.
3. Open the gas shut-off valve.
4. Measure static pressure and record value in the
report on page 180.
Set value: max. 25 mbar (2.5 kPa).
If the set value is exceeded, take steps according
to the table on page 65.
5. Commission the appliance.
Note
During commissioning, the boiler can enter a fault
state (fault EE is displayed) because of air in the
gas line. After approx. 5 s, press reset
R (see oper-
ating instructions) to reset the burner.
6. 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 65.
Note
Use a suitable tester with a resolution of at least
0.1 mbar (0.01 kPa) to check the supply pressure.
7. Record the actual value in the report on page 180.
8. Shut down the appliance and close the gas shut-off
valve. Remove the pressure gauge and tighten the
screw in test connector
A
.
Commissioning, inspection, maintenance
Naming the heating circuits
5775 636 GB