Bosch Thermotechnik 8 719 002 460 0 Instrucciones De Instalación página 29

2.1 Adjusting CO
The CO can only be adjusted by a certified
2
gas technician with a calibrated CO
analyser.
CAUTION:
Gas pressure influence CO
B Control and correct gas pressure (see
Table 2).
Once Gas Pressure is adequate:
B Press ON/OFF button to turn off the heater.
B Remove brass flat head screw on the exhaust collar
(see Fig. 6).
6720608920-18. 1 AL
Fig. 6 Measuring port
B Insert CO analyser probe into the measuring port.
2
The tip of the probe should be in the center of the flue
pipe (approx 40mm inserted).
Avoid air gaps between probe and measuring port as
they can alter readings.
B While holding the Program
ON/OFF button to turn ON the heater (see Fig. 7).
Fig. 7
B As soon as '188' flashes on the display, release the
Program button. The display should now read P2.
B Press or button until "P1" appears on
+
display.
6 720 608 915 (2012/03)
2
2
measurement.
2
button in, press the
6720608915-05. 1 AL
Measuring CO (combustion cover must be installed):
2
B Open all hot water taps to achieve a flow rate of at
least 15 l/m (1 tub and 2 sinks should be sufficient).
If heater display reverts back to P2, open more hot
water fixtures to allow sufficient flow.
B Press until P1 reappears on display.
+
B Record the CO reading in P1 inTable 5.
2
Analyser reading may take several minutes to
stabilize.
B Press the button until P2 appears. Unit will ramp
+
down to low fire and the flow should decrease.
Program CO
P1 __________%
P2 __________%
Table 5
Adjusting CO
2
Note: P1 adjustment will change the P2
reading. Confirm the P1 value BEFORE
adjusting the P2 level.
If P1 CO level is off:
2
B Loosen yellow painted philips screw (1) and cover
should rotate down (2) revealing a recessed brass
slotted screw (see Fig. 10).
B Turning the slotted screw counter clockwise.
will raise P1 CO levels.
2
B Turning the slotted screw clockwise.
will lower P1 CO levels.
2
Adjustments to the slotted screw will also
change P2 CO
2
B After the P1 CO readings are correct, press the
2
button to enter the P2 mode.
B Verify CO readings in P2 mode.
2
Fig. 8 Adjusting P1 CO
Gas Type Conversion
Values
2
levels.
level
2
+
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