NTI FTVN, Установка Запуск Обслуживание

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Part 1 - General Safety Information
Part 11 - Start-Up
Operation 3
-
Adjusting the CO2 at Maximum Gas Flow Rate (High
Fan Speed)
Set the thermostat at the highest possible setting or draw off the
domestic hot water at the maximum water flow rate to create a
demand for heat.
Note:
For only Heating Boiler Applications, open all
thermostatic valves present in the CH circuit.
Select the TEST Function by pressing and holding the RESET button for
10 seconds.
WARNING! When the Test Function is activated the temperature of
the water coming out of the boiler may be more than 150°F.
and the icon will appear on the display
when Test Function is active. The boiler will operate
at maximum heating power.
Press the button to operate
the boiler at the maximum power.
The
icon will display.
Wait 1 minute for the boiler to
stabilize before carrying out the
combustion analyses. Read the
CO2 value (%) and compare it
with the values given in the table
below:
Natural Gas LP Gas
Fan Speed Low High Low High
CO PPM <175 <175
CO
2
(%)
8.5 - 10.0 9.5 - 11.0
ATTENTION: The CO
2
at minimum gas flow (Low Fan Speed) must
not be set higher than the CO
2
reading at maximum gas flow
(High Fan Speed). It may be set lower by as much as 1.0%.
For Example: If CO
2
at Max. = 9.5%, CO
2
at Min. = 8.5-9.5%
Table 31 - Combustion Settings
ATTENTION!! Obtain all values with the front cover installed.
If the CO2 (%) reading differs from the values given in the table, adjust
the gas valve following the instructions below. Otherwise move
directly to Operation 4.
Adjusting the Gas Valve at Maximum Gas Flow
Adjust the gas valve by turning setting screw 4 clockwise to increase
the CO2 level; counterclockwise to reduce the CO2 level (1 turn adjusts
the CO2 level by approximately 0.3%). Wait 1 minute after each change
in setting for the CO2 value to stabilize.
1
3
2
4
4
4
Figure 78 - Max CO2 Adjustment
It is very important that the combustion system be set within
the recommended CO measurements listed in Table 30. Visually
looking at the burner does not determine combustion quality.
Failure to measure combustion with a calibrated combustion
analyzer and set the throttle within the recommended CO
measurements could result in property damage, severe personal
injury, or death.
WARNING
0
If the value measured corresponds to
the value given in the Table 31, max
adjustment is complete. Otherwise
continue the setting procedure.
ATTENTION!!
The Test Function will
automatically deactivate after 30 minutes,
or Test Function can be turned off manually
by pressing the RESET button.
Operation 4 - Checking the CO2 at Minimum Gas Flow (Low Fan
Speed)
With the Test Function active, press
the
button to operate the boiler
at minimum DHW power. The and
icons will display.
Wait 1 minute for the boiler to
stabilize before carrying out the
combustion analyses.
If the CO2 (%) reading at min gas flow
is greater than the CO2 (%) reading at max flow, or if it is less than the
reading at max flow by more than 0.3%, adjust the gas valve following
the instructions below. Otherwise move directly to Operation 5.
Adjusting the Gas Valve at Minimum
Gas Flow
Remove cap and adjust screw
2
by turning
counter-clockwise to reduce the CO2 level;
clockwise to increase the CO2 level. Wait 1
minute after each adjustment for the CO2
value to stabilize.
WARNING! Minimum Gas Flow
Adjustment is very sensitive.
If the value measured corresponds to
the value given in Table 31 adjustment is
complete. Otherwise continue the setting procedure.
Attention!! If the value of the CO2 at minimum power has been
changed, it is necessary repeat the adjusting at maximum gas flow.
Operation 5 - Ending Adjustment
1. Exit Test Mode by pressing RESET.
2. Turn down the thermostat and / or stop the DHW draw-off. For Only
Heating Boiler applications reset all thermostatic valves.
3. Check for and repair any leaks of gas.
4. Reinstall the front cover.
5. Reinstall the combustion test port - see Figure 77.
1
3
2
4
2
2
Figure 79 - Min CO2
Adjustment
It is required to use a calibrated combustion analyzer to verify
final adjustment according to the combustion chart (Table 31).
Failure to do so could result in serious personal injury or death.