IDEAL LOGIC+ SYSTEM2 S15 Installation & Servicing page 61

Set Boiler to Maximum Gas Rate.
In accordance with boiler instructions, set
boiler to operate at maximum rate (full load
condition). Allow sufficient time for
combustion to stabilise.
Note. Do not insert analyser probe during this period to
avoid possible flooding of sensor.
Verify Flue Integrity.
Analyser readings indicate that combustion products and
inlet air must be mixing. Further investigation of the flue is
therefore required.
Check that flue components are assembled, fixed and
supported as per instructions. Check that flue and flue
terminal are not obstructed.
O2 more than or
equal to 20.6% or CO2 less
than or equal to 0.2%?
Turn off appliance and call Ideal Technical Helpline for
advice.
The appliance must not be commissioned until problems are
identified and resolved. If commissioning cannot be fully
completed, the appliance must be disconnected from the
gas supply in accordance with GSIUR.
Check that no seals, e.g. Those on flue extensions, have
been displaced during installation. Rectify if necessary.
CO level less
than 350ppm and CO/CO
ratio less than 0.0040?
Turn off Appliance and Call Ideal Technical Helpline.
The appliance must not be commissioned until problems
are identified and resolved. If commissioning cannot be
fully completed, the appliance must be disconnected from
the gas supply in accordance with GS(I&U)R.
Note. Check and record CO level and combustion ratio at
both max. and min. rate before contacting Ideal.
Installation and Servicing
Section 6 - Benchmark to Commissioning
Start
Refer to Section
2.29 on
page 32
Is
Yes
No
Is
Yes
2
No
Carry Out Flue Integrity Check Using Analyser.
Insert analyser probe into air inlet test point (where
available) and allow readings to stabilise.
Note. Where no air inlet test point is provided then a flue
integrity check with the analyser is not possible.
The installer should verify that flue integrity has been visually
checked in accordance with the "Prior to CO level and
combustion ratio check" (see opposite page) before
proceeding to the "check CO level and combustion ratio
at maximum rate" stage below.
Is
O2 more than or
No
equal to 20.6% OR CO2 less
than or equal to 0.2%?
Yes
Check CO level and Combustion Ratio at Maximum Gas
Rate.
With boiler still set at maximum gas rate, insert analyser
probe into flue gas sampling point. Allow readings to
stabilise before recording.
Is
CO level less
No
than 350ppm AND CO/CO2
ratio less than 0.0040?
Yes
Set Boiler to Minimum Gas Rate.
In accordance with boiler instructions, set
boiler to operate at minimum rate (to
minimum load condition). Allow sufficient time
for combustion to stabilise.
Check CO and Combustion Ratio at Minimum Gas Rate.
With boiler set at minimum rate, insert analyser probe into flue
gas sampling point. Allow readings to stabilise before recording.
Is
CO level less
No
than 350ppm AND CO/CO2
ratio less than 0.0040?
Yes
Boiler is Operating Satisfactorily.
No further actions required.
Ensure test points are capped, boiler case is correctly
replaced and all other commissioning procedures are
completed. Complete Benchmark Checklist, recording CO
and combustion ratio readings as required.
Refer to Section
2.29 on page
32
61