Bosch Thermotechnik 8 719 002 460 0 Instrucciones De Instalación página 30

Gas Type Conversion
If P2 CO level is off:
2
B Remove yellow painted #40 Torx cover from the front
of the gas valve (Fig. 10, pos.1). A plastic #40 Torx
screw will be revealed.
B Turning the plastic #40 Torx screw counter clockwise.
will lower P2 CO levels.
2
B Turning the plastic #40 Torx screw clockwise.
will raise P2 CO levels.
2
Note: This screw adjustment is very
sensitive and should be made in small
increments. It may take several minutes for
readings to stabilize.
Fig. 9 Adjusting P2 CO
B Verify both P1 and P2 CO
ranges specified in table 6. Repeat steps 1 and 2 as
necesssary until CO
2
ranges.
B Once CO values are within the specified ranges,
2
measure the CO readings on P1 and P2.
These readings can't exceed the values shown in
table 6 according to your appliance. If values exceed
this limit, inspect vent system and heat exchanger fin
coils for blockage.
30
1
2
6720607679-10.1AL
level
2
readings are within the
2
values are within the specified
Values for GWHC 27
CO
max. P1 8.2 % - 8.8 %
min. P2 2.2 % - 2.6 %
max. P1 10.3 % - 10.9 %
min. P2 2.4 % - 3.0 %
Note: Values above are for climate controlled
conditions. Inputs such as gas pressure, heating
value of the gas, humidity and temperature of
combustion air all impact CO and CO
Changes in these inputs can result in different CO
and CO values on the same appliance
2
Table 6 CO and CO target numbers
2
Returning to Service
B Insert the final adjusting values in Table 8.
Program CO Value
2
P1 ______________ %
P2 ______________ %
Table 7
Assemble all parts in reverse order of disassembly:
B Return slotted screw cover to original position and
tighten philips screw.
B Reinstall Torx cover.
B Remove CO analyser probe and reinstall flathead
2
screw with gasket in exhaust collar.
Apply conversion sticker to the right side of
front cover above rating plate sticker.
Ensure information is filled out accurately.
B Press ON/OFF button to turn OFF the heater.
B Press ON/OFF button to turn ON the heater.
Heater is ready for normal operation.
Max. CO
level
range(%) (measured)
2
Nat. Gas
< 200 ppm
< 30 ppm
Butane
< 500 ppm
< 30 ppm
values.
2
Date
6 720 608 915 (2012/03)