Adjusting And Setting Co; Limits; Ac Electrical Power Wiring - Riello Array AR 3000 Installation And Operation Manual

2.11.5 Adjusting and setting CO

− Insert a combustion analyzer probe into the test port
shown in Fig. 13
− Go to the Touchscreen and access the Module screen (as
described on "4.3.4 Module Screen" pag. 26) relevant 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 CO value.
2
Test port of
the module
Fig. 13 Test Port for Combustion Analysis (available on each module)
To adjust the CO value at the maximum power turn the screw "A"
2
(rotate counter-clockwise to increase CO2) shown in Fig. 14, allen
type wrench is necessary for this adjustment.
Verify that the value of CO is stable and is within the range indi-
2
cated 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.
Fig. 14 CO Adjustment
2
To adjust the CO value at the minimum power turn the screw "B"
2
(rotate clockwise to increase CO2) shown in Fig. 14.
Verify that the value of CO is stable and is within the range indi-
2
cated 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.
Array Combustion Values
Gas Type Max. Fire CO
Natural Gas
LP Gas

limits

2
Screw "A"
Screw "B"
% Min. Fire CO
2
8.5 - 9.5 8.5 - 9.5
10.3 - 10.7 10.3 - 10.7

2.12 AC electrical power wiring

External AC power connections are made to the unit inside the
electrical box, located on the front of the unit, inside the front
doors. Open the front doors and remove the panel mounted in
the upper part of the left front door of the unit as shown in Fig. 15.
Left Door
Cover Panel
Service
Display
Fig. 15 Front Doors Internal Layout
Loosen the screws of the cover and remove panel to access the
internal connections shown in Fig. 16.
Left Door
Electrical box
Module Power
Switch
Module Power
Switch
Module Power
Switch
Module Power
Switch
%
2
Fig. 16 Front Doors Electrical box
13
INSTALLATION
Right Door
Cover Panel
Right Door
Electrical box
Module Power
Switch
Module Power
Switch
Module Power
Switch
Module Power
Switch
7