Program Values - Bosch Therm C 1210 ES Installation And Operating Instructions Manual

Maintenance and service
CO
2
max. input P1 9.9 % - 10.5 %
min. input P2 2.5 % - 2.8 %
* 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.
Table 34 CO & CO target numbers
C. Adjusting CO :
2
Note: P1 adjustment will change the P2 reading. Confirm
the P1 value BEFORE adjusting the P2 level.
1. If P1 CO level is off:
2
▶ Loosen yellow painted Phillips screw (1) and cover should
rotate down (2) revealing a recessed brass slotted screw.
Fig. 67.
▶ Turning the slotted screw counter clockwise will raise P1
CO levels and clockwise will lower P1 CO
2
Adjustments to the slotted screw will also change P2 CO
levels.
▶ After bringing the P1 CO2 readings in proper range, press
+
the button to enter the P2 mode. Verify CO
in P2 mode.
2. If P2 CO level is off:
2
▶ Remove yellow painted #40 Torx cover from the front of the
gas valve. (Fig. 68) A plastic #40 Torx screw will be
revealed.
▶ Turning the plastic #40 Torx screw counter clockwise will
lower P2 CO levels and clockwise will raise P2 CO
2
Note: This screw adjustment is very sensitive and should be
made in small increments. It may take several minutes for
readings to stabilize.
3. Verify both P1 and P2 CO
specified in table 34. Repeat steps 1 and 2 as necessary until
CO values are within the specified ranges.
2
Final Readings
P1 CO Reading:
2
P2 CO Reading:
2
54
range (%) Max. CO level
(measured)
LP Gas
< 290 ppm
< 60 ppm
2
levels.
2
2
readings are within the ranges
2
% CO
2
% CO
2
D. Returning to Service:
1. Return slotted screw cover to original position.
2. Reinstall Torx cover.
3. Remove CO
with gasket in exhaust collar.
4. Press ON/OFF button to turn OFF the heater and then turn
ON the heater.
5. Heater is ready for normal operation.
values.
2
Fig. 67 Adjusting P1 CO
2
readings
levels.
2
Fig. 68 Adjusting P2 CO
7.6

Program values

This section describes details on programming the appliance.
For most applications the factory default values will provide
robust and stable operation. Only adjust the factory settings if
the installation requires changes as indicated in the
appropriate section of this manual.
Refer to chapter 7.7 Control board diagnostics (page 56)
regarding how to access these P-modes.
analyzer probe and reinstall flathead screw
2
level
2
level
2
C 1210ES/ESC – 6 720 644 887 (2022/04)
6720608158-38.1AL