Adjusting And Setting O Limits - Riello Array AR 399 SE Installation, Operation And Service Manual

INSTALLATION
− remove the tube (2), that connects the mixer and the gas
valve
Fig. 22 NG mixer removal
− remove screws (3) in order to get out the mixer
Fig. 23 NG mixer removal
− connect the LPG mixer (4) to the fan, putting in the O-ring
(5) and screws (6)
Fig. 24 LPG mixer installation
− reassemble the fan unit and the mixer by reversing the pre-
vious operations.
− Use the PB inner display to enter the appliance configura-
tion menu and change the parameters #97 and #98:
Model
Par. 97
Par. 98
− Adjust the O parameter as explained in next chapter
2
− Affix the gas type label from the gas conversion kit to the
appliance.
3.15 Adjusting and Setting O
− Insert a combustion analyzer probe into the test port;
− Go to the Touchscreen and access the Module screen rele-
vant to the module under analysis;
− Press "MODULE TEST" button;
− Press "HIGH POWER" button.
Wait 2 or 3 minutes to reach steady state conditions and record
the O value.
2
To adjust the O value at high-fire turn the screw "A" (rotate count-
2
er-clockwise to decrease O
this adjustment.
Verify that the value of O
2
ed in the following table (be careful to make small changes and
confirm that the value is stable before making additional adjust-
ment).
Press "LOW POWER": the fan will run at the minimum speed.
To adjust the O value at the minimum input, turn the screw "B"
2
(rotate clockwise to decrease O
Screw "B"
Fig. 25 Adjusting O
2
Verify that the value of O
2
ed in the following table (be careful to make small changes and
confirm that the value is stable before making additional adjust-
ment).
Press "Reset" and the boiler return to the "stand by" mode.
Press "Reset" to return the boiler to standby mode.
Repeat above process for all heat exchangers.
Array Combustion Values
Gas Type
Natural Gas
LP Gas
26
LPG
AR 399 SE AR 500 SE
22
84
Limits
2
) . An allen type wrench is necessary for
2
is stable and within the range indicat-
)
2
Screw "A"
is stable and within the range indicat-
Max. Fire O % Min. Fire O
2
4.2 – 5.8 4.2 – 5.8
5.0 - 5.6 5.0 - 5.6
22
82
%
2