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Worcester-Bosch GREENSPRING CWi47 Manual

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Commissioning
GREENSPRING CWi47 – 6 720 646 322 (2015/04)
9.3 Adjusting CO
2
(carbon dioxide)
When the gas pressure is correct:
▶ Press ON/OFF button to turn off the appliance.
▶ Remove brass flat head screw on the flue gas connector
(Fig.
57).
Fig. 57 Measuring port
▶Insert CO
2
analyzer probe into the test point. The tip of the
probe should be in the center of the flue pipe (inserted
approximately 60mm). Avoid air gaps between probe and
measuring port as they can alter readings.
▶ While holding the Program (P) button, press the ON/OFF
button to turn ON the heater (Fig.
58).
Fig. 58
▶ While holding the Program button, press the ON/OFF
button to turn ON the heater. As soon as ‘188’ flashes on
the display, release the Program button. The display should
now read P2.
▶Press or button until “P1” appears on display.
Measuring CO
2
(Combustion cover Installed):
▶ Open all hot water taps to achieve a flow rate of at least 15
l/m (1 tub and 2 sinks are usually sufficient). If heater
display reverts back to P2, open more hot water fixtures to
allow sufficient flow.
▶Press until P1 reappears on the display.
▶ Record the CO
2
reading in P1 in the Table 18.
Analyzer reading may take several minutes to stabilize.
▶Press button until P2 appears. Unit will ramp down to
low fire and the water flow should decrease.
Adjusting CO
2
If P1 CO
2
level is out of range:
▶ Loosen yellow painted philips screw (Fig. 59,[1]) and
cover should rotate down (Fig.
59, [2]) revealing a
recessed brass slotted screw. (Fig.
59, [3]).
▶ Turning the slotted screw counter clockwise.
P1 CO
2
levels, will increase.
▶ Turning the slotted screw clockwise.
P1 CO
2
levels, will decrease.
▶ After bringing the P1 CO
2
readings in proper range, press
the
button to enter the P2 mode.
The CO
2
shall only be adjusted by a Gas Safe
registered installer with a calibrated CO
2
analyzer.
CAUTION: Insufficient gas pressure
May affect CO
2
levels.
▶ Check and adjust gas pressure
(Chapter
9.2).
6720646322-02.1V
CO2
O2
6720608920-19.1AL
Program CO
2
values
P1 __________%
P2 __________%
Table 18
Note: P1 adjustment will change the P2
reading. Confirm the P1 value BEFORE
adjusting the P2 level.
Adjustments to the slotted screw (P1) will
also change P2 CO
2
levels.
+
+
+
+
… 41 …


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