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COMMISSIONING AND MAINTENANCE
3.5
Adjustments
The thermal module Steel Pro Power is supplied for operation
with G20 (methane gas), as indicated by the type plate, and has
already been factory-calibrated by the manufacturer.
If further adjustments need to be made, for example after
non-scheduled maintenance, replacing a gas valve or switching
the gas supply, follow the instructions below.
9
Adjustments to maximum and minimum power must be
performed in the indicated sequence and only by Technical
Assistance Service.
Before making the regulation:
− access inside the module
− identify the unit on which you want to operate.
CO2 ADJUSTMENT AT MAXIMUM POWER
− Press the MENU key, select "System test" and press ● to
confirm.
Menu
"
"
Domestic Hot Water (DHW)
"
"
Information
"
"
Settings
"
"
System Test
"
"
− Selecting "System Test" you will have the following screen:
System Test
"
"
Boiler
Managing
"
"
"
"
− Choose between "Master" or "Dep1 ... N"
− select "Max. power" with the ▲ / ▼ keys and press ● to
confirm. The fan starts turning at its maximum speed
(which can vary based on the model).
System Test
"
"
Test State
High Power
"
"
"
Fan Speed
0
rpm
"
"
"
"
Ionisation
0.0 μA
"
"
− the appliance will operate at maximum power.
− unscrew the flue gas probe (1) and insert the combustion
analyzer probe
− set the CO2 with a screwdriver on the regulation screw (2)
placed on the gas valve, thus reaching the value reported
on the table.
Gas type
CO2% maximum power
G20
G25
Steel Pro Power 114-2 P/V
9
9
Steel Pro Power 140-2 P/V
9
9
Steel Pro Power 180-2 P/V
9
9
Steel Pro Power 230-2 P/V
9
9
Steel Pro Power 270-2 P/V
9 (*)
9
Steel Pro Power 300-3 P/V
9 (*)
9
Steel Pro Power 345-3 P/V
9
9
Steel Pro Power 405-3 P/V
9 (*)
9
Steel Pro Power 460-4 P/V
9
9
Steel Pro Power 540-4 P/V
9 (*)
9
9
(*) In Belgium and Switzerland the value must be adjusted
to 8.6.
CO2 ADJUSTMENT AT MINIMUM POWER
− Select "Min. power" with the ▲ / ▼ keys and press ● to
confirm.
System Test
"
"
Test State
"
"
Fan Speed
"
"
Ionisation
"
"
− the appliance will operate at minimum power.
− Adjust the CO2 using a screwdriver on the adjustment
screw (3) on the fan unit, so as to obtain a value listed
in the table.
Gas type
CO2% minimum power
G20
G25
Steel Pro Power 114-2 P/V
9
9
Steel Pro Power 140-2 P/V
9
9
Steel Pro Power 180-2 P/V
9
9
Steel Pro Power 230-2 P/V
9
9
Steel Pro Power 270-2 P/V
9
9
Steel Pro Power 300-3 P/V
9
9
Steel Pro Power 345-3 P/V
9
9
Steel Pro Power 405-3 P/V
9
9
Steel Pro Power 460-4 P/V
9
9
"
Steel Pro Power 540-4 P/V
9
9
80
Versions 114-2 P/V ÷ 140-2 P/V
G30
G31
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
Low Power
"
"
0
rpm
Versions 180-2 P/V ÷ 540-4 P/V
"
"
0.0 μA
G30
G31
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
10,4
CHECKING THE CALIBRATION
Select the "Max. power" value, wait until speed stabilises and
check that CO
correspond to required ones.
2
After the checks:
− select "OFF" with the ▲ / ▼ keys and press ● to confirm.
− remove the analyzer probe and carefully screw the flue
probe back (1)
− place back the front panel and lock the locking screw.
System Test
"
"
Test State
"
"
Fan Speed
"
"
Ionisation
"
"
COMMISSIONING AND MAINTENANCE
3.6
System antifreeze protection
The anti-freeze protection function protects the system against
freezing.
CO
+
CO
+
2
2
The flow and return sensors of each individual thermal element
3
2
are monitored to generate an antifreeze protection request in
the following ways:
− When one of the sensors falls below 10°C, the CH pump
and the module pump start up.
− When one of the sensors falls below 5°C, the burner is
started.
− When all sensors measure a value above 15°C, the anti-
freeze protection request is deactivated.
− When the primary probe detects a temperature lower
than parameter 155 (by default set to 15°C), the CH pumps
and the general cascade pump are activated. When the
temperature of the primary probe reaches the value de-
1
fined by the parameter 155 plus 5 degrees, the request
ceases and the cascade returns to stand-by mode.
− When the antifreeze protection is switched off, the pumps
continue to operate for the post-circulation period.
If the external probe is present, an additional antifreeze pro-
tection is activated. If the external probe detects a temperature
lower than that set in parameter 186 (default value=3), then the
pump of the first element and the pump of the CH circuit are
started.
In case of indoor installation and if no antifreeze protection
(linked to the external probe) is requested, it is sufficient to set
the parameter 186 at the lowest possible value (-30).
CO
+
CO
+
2
2
3
2
1
Off
"
"
0
rpm
"
"
0.0 μA
81
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