Viessmann VITOPEND 200, Installation And Service Instructions For Contractors

Page: 27 / 132

Checking the nozzle pressure
A Test connector
B Cap
C Screw
D Phillips screw
1. Close the gas shut-off valve.
2. Release the screw inside test
connector
A , but do not remove,
then connect the pressure gauge.
3. Open the gas shut-off valve. Start
the boiler.
4. Select the upper rated output.
Constant temperature control
unit:
K + d press simultaneously:
"
1 " is shown.
a press:
"
2 " is shown.
Weather-compensated control
unit:
K + d press simultaneously:
"
Relay test " and then
" Base load " is shown.
a " Full load " is shown.
5. Remove cap B from the gas
train.
6. Test the nozzle pressure at the
upper rated output.
In case of
deviations from the value
shown in the following table
,
adjust the nozzle pressure for the
upper rated output at screw
C
(SW 10).
7. Press d .
Operation with the upper output is
terminated.
8. Select the lower rated output.
Constant temperature control
unit:
K + d press simultaneously:
"
1 " is shown.
Weather-compensated control
unit:
K + d press simultaneously:
"
Relay test " and then
" Base load " is shown.
Further details regarding the individual steps
(cont.)
27
Commissioning, inspection, maintenance
5592
817
GB
Service