Combustion Analysis - Riello Condexa PRO NA 75P Installation, Operation And Service Manual

4.11 Combustion Analysis

The Condexa PRO NA is supplied for operation with natural gas, as
indicated by the rating plate, and has already been factory-cali-
brated by the manufacturer.
However, if it is necessary to repeat the adjustments, for example
after non-scheduled maintenance, replacing the gas valve or af-
ter gas conversion from natural gas to LPG, or vice versa, proceed
as described below.
9
WARNING: Adjustments to maximum and minimum power
must be performed in the indicated sequence and only by
qualified installer, service agency or gas supplier.
Before making the adjustments:
− remove the locking screw
− pull the front panel outwards and then to the top to re-
move it from points A.
A
A
CO2 ADJUSTMENT AT MAXIMUM POWER
− Press the MENU button, select "System test" and press ●
button to confirm.
Menu
" "
Domestic Hot Water (DHW)
"
Information
" "
Settings
" "
System Test
" "
− select "Max. power" with the ▲ / ▼ buttons and press ●
button to confirm. The fan starts turning at its maximum
speed (which can vary based on the model).
System Test
" "
Test State
" "
Fan Speed
" "
Ionization
" "
− the appliance will operate at maximum power.
− remove the cap (1) and insert the combustion analyzer
probe
− set the CO2 with a screwdriver on the adjustment screw (2)
on the gas valve, thus reaching the value reported on the
table.
Gas type
Natural Gas
LPG (Propane)
85
COMMISSIONING AND MAINTENANCE
"
High Power
" "
0 rpm
" "
0.0 A
CO2% maximum power
8.8-9.2
10.2-10.6