Co 2 Value - A.O. Smith Innovo IR 12-160 Installation, User And Service Manual

8.9.4
c
54
13. Disconnect the pressure gauge.
14. Tighten the sealing screw in the test nipple.
Fig. Gas supply pressure
"
CO value
2
Check the CO value:
2
1. Open the gas supply.
2. Remove the cap (1) from the test nipple (2) of the flue gas outlet pipe.
3. Place the measurement probe of the CO
outlet pipe.
4. Turn on the water heater, refer to Turn on the water heater (see 4.2).
5. Set parameter 201 to Hi, refer to Settings (see 10).
6. If necessary, create a heat demand:
- Use a hot water draw-off point to tap water, or
- Raise the setpoint of the water temperature, refer to Set the water temperature
(see 4.2.2).
7. Wait until the measured value on the CO
can take several minutes.
8. Compare the full load measured value to the value from the appendix Gas details.
The CO value at full load must be within ±1.0 vol% of the CO
2
table.
Caution
When the CO value is not correct, refer to General errors (see 12.1.1),
2
CO value (at full load) is not correct.
2
Do not use the water heater when the CO
is not caused by the restrictor, venturi, venting system or gas category:
• Switch off the appliance.
• Turn off the gas supply.
• Put the cover back on the water heater.
• Contact your supplier.
9. Set parameter 201 to Lo, refer to section Settings (see 10).
10. Wait until the measured value on the CO
can take several minutes.
11. Compare the measured value to the value measured under full load.
The CO value at partial load must be within ±0.3 vol% of the CO
2
under full load.
12. If necessary, use a hex driver to adjust the adjuster screw until the CO
correct.
a) Turn the screw clockwise for a higher CO
b) Turn the screw anticlockwise for a lower CO
1. Adjuster screw
2. Gas control valve
3. Gas supply pipe
4. Sealing screw
!
meter in the test nipple of the flue gas
2
meter remains stable for some time. This
2
value stated in the
2
value is not correct and this
2
meter remains stable for some time. This
2
value.
2
value.
2
Installation, Maintenance and Service part
value measured
2
value is
2