Adjustments; Gas Valve Calibration; Gas Conversion - Riello Condexa HPR 35 Instructions For The Installer And For The Technical Assistance Centre

COMMISSIONING

3.16 Adjustments

The boiler was adjusted by the manufacturer at the time
of production. If the adjustments need to be made again
however, for example after extraordinary maintenance, the
replacement of the gas valve or conversion from methane gas
to LPG or viceversa, follow the procedures explained below.
The adjustments of the maximum and minimum output,
heating maximum and slow ignition, must necessarily be
made in the sequence indicated, and by qualified person-
nel only.
ƒ power the boiler
ƒ access the parameters as explained in paragraph "1.17
Accessing the parameters"
ƒ select menu P3 and confirm with
ƒ use the arrows to visualise the parameter required -
see table -
P3.06 minimum fan speed
P3.07 maximum fan speed
P3.08 slow ignition
P3.09 maximum fan speed - heating
P3.13 reignition speed
ƒ enter the sub-menu by pressing
ƒ set the required values with the
referring to the following tables
ƒ make sure P3.09=P3.10
table 1
MAXIMUM NO. FAN METHANE GAS
ROTATIONS
35 Risc.
45 Risc.
55 Risc.
70 Risc.
table 2
MINIMUM NO. FAN METHANE GAS
ROTATIONS
35
45
55
70
table 3
NO. FAN ROTATIONS
(SLOW IGNITION)
35
45
55
70
confirm the values with
ƒ

3.17 Gas valve calibration

Run the CO2 check procedure as explained in paragraph
"3.15 Combustion check". If the values need to be
modified, proceed as follows:
ƒ check the CO values with the casing closed
2
ƒ remove the casing as explained in paragraph "2.10
Removing the casing"
ƒ check the CO values again, with the casing open
2
ƒ bearing in mind the difference between the values
measured with the casing closed and open, if nec-
essary adjust the CO
- (minus) the difference noted. Example:
ƒ CO value measured with the casing closed = 8.5%
2
ƒ CO value measured with the casing open = 8.3%
2
and
LIQUID GAS
(G20) (G31)
7.300 7.100
9.100 8.900
6.800 6.300
8.200 7.800
LIQUID GAS
(G20) (G31)
1.750 1.650
1.750 1.650
1.850 1.750
1.850 1.750
METHANE LIQUID
GAS (G20) GAS (G31)
4.000 4.000
4.000 4.000
3.000 2.400
3.000 2.400
Enter
.
to the value shown in the table
2
ƒ value to be set for CO
ƒ value that must be measured for CO
closed = 9.0%
ƒ for the CO value adjustments:
2
ƒ rotate the maximum output adjustment screw clock-
wise to reduce the value, or anti-clockwise to in-
crease it
ƒ rotate the minimum output adjustment screw clock-
wise to increase the value, or anti-clockwise to re-
duce it
ƒ with the casing open, and after adjusting the CO
ue at the minimum output, check the CO
maximum output again
ƒ after completing the adjustments, refit the casing and
check the CO
the table
CO +
2
Minimum output
adjustment screw
buttons,

3.18 Gas conversion

It is easy to make the conversion from one gas to another
rpm
even after the boiler has been installed.
This operation must be carried out by professionally
rpm
qualified personnel. The boiler is designed to operate
rpm
with methane gas (G20) according to the product label.
rpm
It is possible to convert the boiler to LPG with the aid of
the relative kits.
For disassembly refer to instructions below:
ƒ disconnect the boiler from the electricity supply and
turn off the gas tap
rpm
ƒ remove the casing as explained in paragraph "2.10
rpm Removing the casing"
ƒ release the instrument panel and rotate it forwards.
rpm
rpm
For CONDEXA HPR 35-45 models
ƒ Loosen the nut of the gas train (A).
ƒ Remove the nozzle (B) inside the gas valve, and re-
place it with the one in the kit.
rpm
A
rpm
rpm
rpm
B
For CONDEXA HPR 55-70 models
ƒ Disconnect the gas train (A) of the mixer.
ƒ Loosen the 3 screws (B) fastening the mixer to the fan,
and remove it.
ƒ Loosen the 2 screws (C) fastening the plastic Venturi
tube to the aluminium body, then lever it off with the
aid of a screwdriver (do not apply excessive force, as
the plastic teeth may get damaged).
ƒ Take out the Venturi tube.
ƒ Replace the mixer+ nozzle assembly (D) with the one
in the kit.
42
with casing open = 8.8%
2
value corresponds to the one shown in
2
Maximum output
adjustment screw
with casing
2
val-
2
value at the
2
CO -
2