28 Installation and maintenance instructions Ultimate 3 0020239568_03
3. Unscrew the cover from the flue gas analysis point (1).
4. Measure the CO₂ content at the flue gas analysis point
(1).
5. Compare the measured value with the corresponding
value in the table.
Checking the CO₂
content
Removed
front casing
Fitted front
casing
Natural gas H Natural gas H
CO₂ at full load 9.0 ±1.0 vol. % 9.2 ±1.0 vol. %
CO at full load ≤ 250 ppm ≤ 250 ppm
CO/CO₂ ≤ 0.0031 ≤ 0.0031
◁ The value is OK.
▽ The value is not OK; you cannot start up the
product.
▶ Inform Customer Service.
9.8 Thoroughly flushing the heating installation
("hot")
1. Operate the appliance until the boiler and the heating
system are up to temperature.
2. Check the heating system for leaks.
3. Connect a hose to the drain valve located at the lowest
position of the heating system.
4. Shut off the boiler, open the drain valve and all purge
valves on the radiators and allow the water to flow out
of the heating system and the boiler quickly and fully.
5. Close the drain valve.
6. Fill the heating system again with water as described in
Filling the heating installation and Purging the heating
installation.
7. Install the front casing.
9.9 Checking leak-tightness
▶ Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
▶ Check that the air/flue pipe has been installed correctly.
Condition: Room-sealed operation
▶ Check whether the vacuum chamber has been closed
tightly.
9.10 Checking the heating mode
1. Activate the heating mode on the user interface.
2. Turn all thermostatic valves on the radiators until they
are fully open.
3. Allow the product to operate for at least 15 minutes.
4. Purge the heating installation.
5. Activate the display for the current operating mode.
(→ Page 24)
Status codes – Overview (→ Page 39)
◁ If the product is working correctly, the display shows
S.04.
10 Adapting the unit to the heating
installation
You can reset/change the system parameters (section "Us-
ing diagnostics codes").
Overview of diagnostics codes (→ Page 37)
10.1 Burner anti-cycling time
To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. The burner anti-cycling time is only active for
the heating mode. Domestic hot water mode during a burner
anti-cycling time does not affect the time function element.
10.1.1 Setting the maximum burner anti-cycling
time
▶ Set diagnostics code . (→ Page 24)
Overview of diagnostics codes (→ Page 37)
10.1.2 Resetting the remaining burner anti-cycling
time
▶
Press and hold the reset button for more than
three seconds.
◁ is shown in the display.
11 Handing over to the end user
▶ At the time of commissioning complete all relevant sec-
tions of the Benchmark commissioning checklist, located
at the rear of this document.
▶ For IE: Complete a “Declaration of Conformity” to indicate
compliance to I.S. 813. An example of this is given in the
current edition of I.S. 813.
▶ When you have finished the installation, affix the en-
closed sticker (which requests that the user reads the
instructions) to the front of the product in the end user's
language.
▶ Draw attention, to the current issue of the Gas Safety
(Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any
property containing a gas appliance in the UK.
▶ Explain to the end user how the safety devices work and
where they are located.
▶ Inform the end user how to handle the product.
▶ In particular, draw attention to the safety warnings that
the end user must follow.
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