Worcester GREENSPRING CWi47 Installation And Operating Instructions Manual page 38

COMMISSIONING
CAUTION: Insufficient gas pressure
May affect CO levels.
2
B Check and adjust gas pressure
( chapter 9.2).
WHEN THE GAS PRESSURE IS CORRECT:
B Press ON/OFF button to turn off the appliance.
B Remove brass flat head screw on the flue gas
connector ( Fig. 56).
CO
2
O
2
Fig. 56 Measuring port
B Insert CO analyzer probe into the test point. The tip
2
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.
B While holding the Program (P) button, press the ON/
OFF button to turn ON the heater (
Fig. 57
B While holding the Program
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.
B Press or button until "P1" appears on display.
+
MEASURING CO (COMBUSTION COVER INSTALLED):
2
B 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.
B Press until P1 reappears on the display.
+
38
6720646322-02. 1 V
Fig. 57).
6720608920-19. 1 AL
button, press the ON/
B Record the CO reading in P1 in the table 17.
2
Analyzer reading may take several minutes to
stabilize.
B Press button until P2 appears. Unit will ramp
+
down to low fire and the water flow should decrease.
Program CO
P1 __________%
P2 __________%
Tab. 17
ADJUSTING CO
2
Note: P1 adjustment will change the P2
reading. Confirm the P1 value BEFORE
adjusting the P2 level.
If P1 CO level is out of range:
2
B Loosen yellow painted philips screw (
1) and cover should rotate down (
revealing a recessed brass slotted screw. (
pos. 3).
B Turning the slotted screw counter clockwise.
P1 CO levels, will increase.
2
B Turning the slotted screw clockwise.
P1 CO levels, will decrease.
2
Adjustments to the slotted screw (P1) will
also change P2 CO
B After bringing the P1 CO2 readings in proper range,
press the button to enter the P2 mode.
+
B Verify CO readings in P2 mode.
2
Fig. 58 Adjusting P1 CO
2
If P2 CO level is out of range:
2
B Remove yellow painted #40 Torx cover from the front
of the gas valve ( Fig. 58). A plastic #40 Torx screw
will be revealed.
B Turning the plastic #40 Torx screw counter clockwise.
P2 CO levels will decrease.
2
6 720 646 322 (2012/05)
values
2
Fig. 58,pos.
Fig. 58, pos. 2)
Fig. 58,
levels.
2
level