Viessmann CT3U, Инструкция по эксплуатации

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12
Preparing the test
C
D
E
F
Fig. 5
1. Open the gas shut-off valve.
2. Start the burner.
3. Press "S" E and "-" D simultaneously.
Display
C
then shows the following:
■ Status: "d" (= control stop)
■ Service: Modulation level in % ("00" = 100 % =
upper heating output, "0" = 0 % = lower heating
output)
CO
2
test at the upper heating output
C
D
E
F
Fig. 6
1. Press "+" F until the service display has incre-
mented to "00" (= 100 %).
2. Note
The CO
2
content for all natural gases must be
between 7.5 and 10.5 %.
Check the CO
2
content at the flue pipe.
Rated heating
output in kW Permissible CO
2
content in
%
400 8.6
±
0.3
500 8.6
±
0.3
630 8.6
±
0.3
A B
Fig. 7
3. If the CO
2
content needs adjusting:
■ Remove cap
B
.
■ Turn setting screw
A
in small increments (3 mm
Allen key) until the CO
2
content lies within the
specified range:
– Turning clockwise
→
CO
2
content falls
– Turning anti-clockwise
→
CO
2
content rises
4. Record the actual value in the report (on page
54).
!
Please note
The CO
2
content must always be lower in
partial load than it is in full load.
Commissioning, inspection, maintenance
Checking the CO2 content
5783 337 GB