A.O. Smith SGS-28, Installation, User And Service Manual

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Fig. SGS 28 to 60 - CO
2
adjustment (partial load)
IMD-1095c R0
Fig. SGS 80 to 120 - CO
2
adjustment (partial load)
IMD-1097b R0
Note
Turning to the left (anticlockwise) means more less (lower CO
2
level) and turning to the
right (clockwise) means more gas (higher CO
2
level).
Note
After conversion, you must check that the gas control valve is gastight.
Remove the CO
2
measurement probe from the measurement nipple of the flue gas
outlet pipe.
Put the cap back on the measurement nipple of the flue gas outlet pipe.
Shut off the gas supply.
Replace the covers.
7.9.5 Switching pressure measurement
To measure the switching pressure, proceed as follows:
Isolate the appliance from the power supply (see section 4.2.2).
Carefully remove the covers from the appliance.
The electrical section is now visible.
Remove the black caps from the measurement point of the pressure switch.
Connect the + of the pressure gauge to the H of the measurement point of the
pressure switch.
Connect the - of the pressure gauge to the L of the measurement point of the
pressure switch.
Zero the pressure gauge.
n
23.
24.
25.
26.
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0311753_SGS_28-120_II_UKUK_V2.0 , 2017-05-03 77