6 720 680 174 (2014/05) Therm 8000S
30 | Installation instructions
When the gas pressure is correct:
▶ Press ON/OFF button to turn off the appliance.
▶ Remove plastic screw on the exhaust collar as seen in
Fig. 50.
Fig. 50 Measuring port
▶Insert CO
2
analyser probe into the measuring port. The tip of
the probe should be in the center of the flue pipe (approx.
40mm inserted). 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 (see Fig. 51).
Fig. 51
▶ 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 should be 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 10 below.
Analyser 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. 52, [1]) and
cover should rotate down (Fig. 52, [2]) revealing a recessed
brass slotted screw. (Fig. 52, [3]).
▶ Turning the slotted screw counter clockwise,
will raise P1 CO
2
levels.
▶ Turning the slotted screw clockwise,
will lower P1 CO
2
levels.
▶ After bringing the P1 CO2 readings in proper range, press
the button to enter the P2 mode.
CAUTION:
One factor that may affect CO
2
levels is
improper gas pressure.
▶ Check and adjust gas pressure, see
chapter 8.2.
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