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Worcester-Bosch GREENSPRING CWi47 Manual

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42
Commissioning
GREENSPRING CWi47 – 6 720 646 322 (2015/04)
▶Verify CO
2
readings in P2 mode.
Fig. 59 Adjusting P1 CO
2
level
If P2 CO
2
level is out of range:
▶ Remove yellow painted #40 Torx cover from the front of
the gas valve (Fig.
59). A plastic #40 Torx screw will be
revealed.
▶ Turning the plastic #40 Torx screw counter clockwise.
P2 CO
2
levels will decrease.
▶ Turning the plastic #40 Torx screw clockwise.
P2 CO
2
levels will increase.
Fig. 60 Adjusting P2 CO
2
level
▶ Verify both P1 and P2 CO
2
readings are within the ranges
specified in Table
19.
▶ Repeat steps 1 and 2 as necessary until CO
2
values are
within the specified ranges.
As soon as the levels of CO
2
are correct, verify the values of
CO corresponds to the limits of the Table
19. If the values
exceed the limits, it is necessary to verify the ventilation
system and heat exchanger.
End of adjustments
▶ Record the final values in Table 20.
Reassemble all parts in reverse order:
▶ Return slotted screw cover to original position and tighten
the philips screw (Fig.
59).
▶ Reinstall Torx protection cover (Fig. 60).
▶ Remove CO
2
analyzer probe and reinstall flathead screw
with gasket in exhaust collar.
▶ Press ON/OFF button to turn OFF the heater.
▶ Press ON/OFF button to turn ON the heater.
Heater is ready for normal operation.
Note: This screw adjustment is very sensitive
and should be made in small increments. It
may take several minutes for readings to
stabilize.
6720608158-38.1AL
CO2 range (%)
Max. CO level
(measured)
Natural gas
Max. P1 8.1% - 8.9% < 200 ppm
Min. P2 2.0% - 2.6% < 30 ppm
Propane
Max. P1 9.2% - 10% < 250 ppm
Min. P2 2.0% - 2.6% < 30 ppm
Note: Values above are for controlled climate conditions.
Inputs such as gas pressure, heating value of the gas,
humidity and temperature of combustion air impact CO and
CO
2
values. Changes in these inputs can result in different
CO and CO
2
values on the same appliance.
Table 19 CO
2
& CO target numbers
Program CO
2
values measured Date
P1 ______________ %
P2 ______________ %
Table 20
… 42 …


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