Dynamic Gas Pressure Test Port; Flue Gas Test; Emissions Test Button; Measuring Co Content Of Flue Gas - Bosch Greenstar Series Installation And Service Instructions For Contractors

Flue gas test

12.4

Dynamic gas pressure test port

▶ Switch the appliance OFF and close the gas shut-off valve.
▶ Loosen the screw in the test port for gas inlet pressure ( Fig. 52,
[1]) and connect a pressure gauge ( Fig. 81).
Fig. 81 Dynamic gas pressure test port
▶ Turn on the gas cock and switch the appliance ON.
▶ Press and hold the emissions test button
The supply temperature alternates on the display with
maximum set heat output.
▶ Briefly press the emissions test button
The supply temperature alternates on the display with
maximum nominal output.
▶ Check the required inlet gas pressure according to table 30.
Gas type Nominal pressure
" W.C. (mbar)
NG 7 (17.4)
LPG (propane) 11 (27.4)
Table 30 Inlet gas pressure
Do not operate the appliance if the measured value is below or above
these values. Determine the cause and eliminate the fault. If this is not
possible, block the appliance on the gas side and notify the gas supplier.
▶ Repeatedly press the emissions test button
out.
The display returns to the supply temperature.
▶ Switch the appliance OFF, turn off the gas cock, remove the pressure
gauge and tighten the screw in the test port for gas inlet pressure.
▶ Reinstall the cover.
64
until it lights up.
=
chimney sweep button.
=
Permissible pressure range
for maximum nominal output
" W.C. (mbar)
3.5-10.5 (8.7-26.1)
8-13 (19.9-32.3)
until the light goes
13 Flue gas test
13.1

Emissions test button

The following appliance outputs can be selected by pressing the
emissions test button until it lights up:
3 4
2 5
1 6
max
Fig. 82 Press the emissions test button
• = Maximum set output in heating mode ( Maximum heating
output, page 56)
• = maximum nominal output
• = Minimum nominal output
You have 15 minutes to complete the tests. After that, the appliance
returns to default mode.
13.2

Measuring CO content of flue gas

Use a multiport flue gas probe for the measurements.
▶ Remove plug from flue gas test port ( Fig. 76).
▶ Insert the flue gas probe approx. 2-3/4 inches (70 mm) into the test
port and seal around it.
▶ Press the emissions test button to select
output.
▶ Measure the CO levels.
DANGER
Risk of flue gas poisoning.
The CO level in the flue gas must be below 200 ppm (air free).
1)
▶ If 9.4 Vol.% CO and a CO level under 200 ppm (af) can not be
2
achieved due to the gas supplied, use a lower CO
emissions under 200 ppm (af) instead.
▶ Repeatedly press the emissions test button
out.
The display returns to the supply temperature.
▶ Remove the flue gas probe and seal the flue gas test port properly
(  Fig. 80).
1) 9.4 Vol.% with NG and 11.0 Vol.% with LPG (propane)
reset
eco
3 4
e
2
6
1
min max
6 720 641 933-51.1O
= maximum nominal
level with CO
2
until the light goes
Greenstar – 6721822579 (2021/01)