Bosch Therm 8000 S GWHC 27 CTDE Installation And Operating Instructions Manual page 30

30 | Installation instructions
CAUTION:
One factor that may a ect CO
improper gas pressure.
B Check and adjust gas pressure, see
chapter 8.2.
When the gas pressure is correct:
B Press ON/OFF button to turn o the appliance.
B Remove plastic screw on the exha
50 .
6720608920-18. 1 AL
Fig. 50 Measuring port
B Insert CO analyzer probe into the measuring port. The tip of
2
the probe should be in the center of the ue pipe (approx
40mm inserted). Avoid air gaps between probe and
measuring port as they can alter readings.
B While holding the Program (P) button, press the ON/OFF
button to turn ON the heater (see Fig. 51 ).
Fig. 51
B While holding the Program
button to turn ON the heater. As soon as '188' ashes on the
display, release the Program b utton. The displa y should now
read P2.
B Press or button until "P1" appears on display.
6 720 680 174 (2012/09)
Measuring CO
B Open all hot water taps to achiev
levels is
2
B Press
B Record the CO
B Press
ust collar as seen in Fig.
Program
P1
P2
Table 10
Adjusting CO
If P1 CO
B Loosen yellow painted philips screw (Fig. 52 ,pos. 1) and
B Turning the slotted screw counter clockwise,
B Turning the slotted screw clockwise,
B After bringing the P1 CO2 readings in proper range, press
button, press the ON/OFF
(Combustion cover Installed):
2
e a ow rate of at least 15 l/
m (1 tub and 2 sinks should be su cient). If heater display
reverts back to P2, open more hot water xtures to allow
su cient ow.
until P1 reap p ears on the display.
reading in P1 in the table 10 below.
2
Analyzer reading may take several minutes to stabilize.
button until P2 appear
low re and the water ow should decrease.
CO values
2
__________%
__________%
2
Note: P1 adjustment will change the P2
reading. Con rm the P1 value BEFORE
adjusting the P2 level .
level is out of range:
2
cover should rotate down (Fig. 52 , pos. 2) revealing a
recessed brass slotted screw. (Fig. 52 , pos. 3).
will raise P1 CO levels.
2
will lower P1 CO levels.
2
Adjustments to the slotted screw (P1) will
also change P2 CO levels.
2
the button to enter the P2 mode.
s. Unit will ramp down to
Therm 8000 S