Navien NCB-180, Руководство пользователя

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Maintaining the Boiler 19
WARNING
Following installation, the valve lever must be operated at
least once a year to ensure that waterways are clear. Certain
naturally occurring mineral deposits may adhere to the valve,
rendering it inoperative. When manually operating the lever,
water will discharge and precautions must be taken to avoid
contact with hot water and to avoid water damage.
Before operating lever, check to see that a discharge line is
connected to this valve directing the flow of hot water from the
valve to a proper place of disposal. Otherwise severe personal
injury may result. If no water flows, valve is inoperative. Shut
down the boiler until a new relief valve has been installed.
2. After following the above warning directions, if the relief
valve weeps or will not seat properly, replace the relief valve.
Ensure that the reason for relief valve weeping is the valve and
not over-pressurization of the system due to expansion tank
waterlogging or undersizing.
Inspecting the Ignition and Flame Detector Electrodes
1. Remove the ignition and flame detector electrodes from the
boiler heat exchanger.
2. Remove any deposits accumulated on the ignition/flame
detector electrode. If the electrodes cannot be cleaned
satisfactorily, replace with new ones.
3. Replace ignition/flame detector electrode, making sure gasket
is in good condition and correctly positioned.
Checking the Ignition Ground Wiring
1. Check that the ground wire is in good condition and securely
attached to the boiler casing.
2. Check ground continuity of wiring using continuity meter.
3. Replace ground wires if ground continuity is not satisfactory.
Checking all Boiler Wiring
●
Inspect all boiler wiring, making sure wires are in good condition
and securely attached.
Checking the Control Settings
1. From the front panel, enter the Diagnostics Mode and check all
settings. Adjust settings if necessary.
2. Check settings of external limit controls (if any) and adjust if
necessary.
Performing Start-up and Checks
1. Start boiler and make sure that the boiler is operating properly.
2. Verify cold fill pressure is correct and that operating pressure
does not go too high.
Check the Burner Flame
1. Inspect flame through observation window.
2. If the flame is unsatisfactory at either high fire or low fire, check
for obstructions in the venting and ensure that the air intake
filter is clean.
Review with the Owner
1. Review the User’s Information Manual with the owner.
2. Emphasize the need to perform the maintenance schedule.
3. Remind the owner of the need to call a licensed contractor
should the boiler or system exhibit any unusual behavior.
4. Remind the owner to follow the proper shutdown procedure
and to schedule an annual start-up at the beginning of the
next heating season.