Checking The Nozzle Pressure - Viessmann VITOPEND 200 Installation And Service Instructions Manual

Initial start-up, inspection, maintenance
Further details regarding the individual steps
8. Switch OFF the system at the con-
trol unit (the boiler shuts down),
close the gas shut‐off valve,
remove the pressure gauge and
close test port A with the screw.

Checking the nozzle pressure

A Test port
B Cap
C Screw
D Phillips screw
26
(cont.)
9. Open the gas shut‐off valve and
start the boiler.
Danger
Gas escaping from the test
port leads to a risk of explo-
sion.
Check test port for sound-
ness.
1. Close the gas shut‐off valve.
2. Release the screw inside test port
A, but never remove, and con-
nect the pressure gauge.
3. Open the gas shut‐off valve. Start
up 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" is shown.
a
"Full load" is shown.
5. Remove cap B from the gas
combination valve.