Cointra CETI Baixo NOx, Технические инструкции

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8
Touch the “
+
” key once and the first parameter of the valve
to be calibrated appears, “PH”, relative to Maximum Pressure
.
9
Selecting “PH”, you must touch the
Standby
key to enter its
calibration, showing its internal value of the Maximum Pressu-
re parameter.
10
To set the “PH” parameter, touch the “
+
” or “
–
” key on the
panel until the gauge shows the Maximum nominal Pressure
minus 1 mbar. Wait 10 seconds for the pressure to stabilize.
If the gauge shows a different value to the maximum nominal
pressure, increase the “PH” parameter in steps with the “
+
”
key. After each change, wait 10 seconds for the pressure to
stabilize. If the gauge shows the same value as the Maximum
nominal Pressure, confirm it with the
Standby key.
11 To set the next parameter to be calibrated, from “PH” you must
touch the “
+ ” key 8 times, until you reach the “P2” parameter,
relative to the Minimum Pressure.
12 Selecting “P2”, you must touch the Standby key to enter its
calibration, showing its internal value of the Minimum Pressu-
re parameter.
13 To adjust the “P2” parameter, touch the “ + ” or “ – ” key on the
panel until the gauge shows the Minimum nominal Pressure
plus 0.5 mbar. Wait 10 seconds for the pressure to stabilize.
If the gauge shows a different value to the minimum nominal
pressure, reduce the “P2” parameter in steps with the “
– ” key.
After each change, wait 10 seconds for the pressure to stabili-
ze. If the gauge shows the same value as the Minimum nomi-
nal Pressure, confirm it with the
Standby
key.
14
To complete the calibration process you must then touch the
“
+
” key until you reach the final “
qU
” parameter.
From this
final parameter, you must confirm and exit by touching the-
Standby key
.
15 Disconnect the gauge.
3.2 COMMISSIONING
Commissioning of the water heater must
be performed by a trained, specialized
technician.
Checks that must be performed during
the first ignition, after maintenance work
which requires the unit to be disconnected
and after every intervention on the unit’s
safety devices or components.
3.2.1 Before turning the water heater on
• Check the tightness of the gas installation carefully for leaks on
the connections using a soap and water solution.
• Fill the hydraulic installation and check that there is no air in
either the unit or the installation.
• Check that there are no water leaks in the installation or the
unit.
• Check that the connection to the electrical system and the
grounding are correct.
• Check that the gas pressure is correct.
• Check that there are no flammable liquids or materials near the
water heater.
• Do not place the water heater on the floor with the connections
facing down, so the connections are not damaged.
3.2.2 Checks during operation
• Turn the unit on.
• Make sure the fuel and water systems are tight.
• Check the efficiency of the air and flue gas ducts while the wa-
ter heater is operating.
• Check that the gas valve modulates correctly.
• Check that the water heater ignites easily by doing a few on
and off tests.
• Check that the fuel consumption indicated on the meter
matches that shown in the Technical Data Table, Section 4.3.
3.3 MAINTENANCE
3.3.1 Regular check
In order for the unit to operate correctly, an authorized technician
must perform an annual inspection, checking that:
• The control and safety devices (gas valve, flow switch, etc.)
work correctly.
• The exhaust vent is perfectly efficient.
• The air and flue gas ducts and terminal are free of obstacles
and leaks.
• The burner and the exchanger have no dirt or deposits. Do not
use chemicals or steel brushes to clean them.
• The electrode is free of deposits and properly positioned.
• The gas and water systems are perfectly tight.
• The gas delivery and operating pressure values are as indica-
ted on the tables.
A soft, damp cloth may be used to clean the ca-
sing and exterior parts of the water heater, using
soapy water if necessary. Do not use abrasive
detergents or solvents.
69
EN
CETI
A73023711 - Rev. 00 - 2022-10