TriangleTube Instinct COMBI 155, Инструкция по установке и обслуживанию

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CHAPTER
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7
CHAPTER 17 - MAINTENANCE PROCEDURES
17.11. Check Boiler Relief Valve
Inspect the relief valve and lift the lever to verify flow at
least annually or as recommended on the warning tag
of the valve.
Before manually operating the pressure relief
valve, ensure the discharge piping is directed to
a suitable place of disposal to avoid a potential
scald hazard. The discharge piping must be full
size without restriction and installed to permit
complete drainage of both the valve and line.
Failure to comply with this instruction can result
in substantial property damage, serious injury, or
death.
If after closing the valve, the valve fails to seat properly
or continually weeps, replace the relief valve. Ensure
the cause of the relief valve to weep is the valve itself,
not due to system over-pressurization caused by an
expansion tank that is waterlogged or undersized.
17.12. Inspection of Ignitor
• Remove the ignitor from the burner mounting plate.
• Remove any white oxides accumulated on the
ignitor using fine grit sandpaper or steel wool. If the
ignitor does not clean to a satisfactory condition,
replace the ignitor .
• When installing the ignitor, ensure the gasket is in
good condition and correctly positioned. Replace
the gasket if necessary. Tighten ignitor screws in
multiple steps, alternating between the screws
to ensure proper alignment. See
Section 17.24 on
page 87 for torque specifications.
17.13. Check Ignition Cable and Ground Wiring
• Inspect the ignition cable from the spark generator
to the ignitor.
• Inspect the ground wire from the spark generator
to the ignitor.
• Ensure wiring is in good condition and securely connected.
• Check ground continuity using a continuity meter.
• Replace ground wire if ground continuity is not
satisfactory.
17.14. Check Control Wiring
Inspect all control wiring. Ensure wiring is in good con-
dition and properly connected.
WARNING
17.15. Check Control Settings
• Review all boiler settings in the Heating & DHW
EZ Setup menus. Adjust settings as necessary, see
Section 9.7 on page 54 and Section 9.8 on page 56.
• Check any external limit control settings (if used).
Adjust settings as necessary.
17.16. Perform Start-up and Checkout
Procedures
• Start the unit and perform the start-up procedures
as listed in Chapter 11 on page 69 .
• Verify the cold water fill pressure is correct and the
operating pressure of the boiler is within normal
operating range.
• Complete the checkout procedures as outlined in
Chapter 14 on page 77.
17.17. Check Burner Flame
• Inspect the flame pattern through the observation
port of the heat exchanger.
• If flame pattern is not fully blue and covers the entire
burner surface during high fire, shut the unit down
and allow it to cool thoroughly before disassembly.
• Close the external manual gas valve on the gas
supply line and disconnect the gas piping and gas
valve wire harness connector.
• Disconnect the wiring harness connectors from the
blower and remove the blower. Remove the blower
from the unit.
• Remove the mounting nuts securing the burner
plate to the heat exchanger and set aside. Also re-
move the two screws* securing the burner plate to
the back panel at the rear and discard.
* These two screws are for transportation purposes
only and can be discarded.
• Carefully remove the burner plate assembly from
the heat exchanger by lifting the front of the
burner plate initially then disengage the plate from
rear studs. Ensure that the combustion chamber
2-in-1 insulation is not damaged during removal of
burner mounting plate assembly.
• Remove the burner head mounting screws and re-
move the burner head. Inspect the burner head for
deterioration. Use compressed air or a vacuum to
clean the burner head.
• Remove the venturi and gas valve assembly from
the blower.