2
Maintenance schedule
5
Service technician
General:
• Reported problems
• Inspect interior; clean and vacuum if
necessary
• Clean condensate trap and fill with fresh
water
•
Check for leaks (water, gas, flue,
condensate)
• Verify flue and air lines in good condition
and sealed tight
• Check system water pressure/system
piping/expansion tank
• Check control settings
• Ignition and flame sense electrodes
(sand off any deposits; clean and
reposition)
• Wiring and connections
•
Perform start-up checkout and performance
verification per Section 10 in the Noble
Combi Boiler Installation and Service
Manual.
• Flame inspection (stable, uniform)
• Flame signal (at least 4 mA)
•
Clean the heat exchanger if flue
temperature is more than 54°F above
return water temperature.
If combustion or performance indicate
need:
• Clean heat exchanger
•
Remove and clean burner using
compressed air only
• Clean the blower wheel
Owner maintenance
(see pages 6 - 8 for detailed instructions)
Daily
• Check boiler area
•
Check pressure/temperature
gauge
Monthly
• Check vent piping
• Check air piping
• Check air and vent termination
screens
• Check relief valve
• Inspect condensate drain system
Periodically
• Test low water cutoff (if used)
• Reset button (low water cutoff)
Every
6 months
• Check boiler piping (gas and
water) for leaks
• Operate relief valve
End
of season
months
• Shut boiler down (unless boiler
used for domestic hot water)
WARNING
Follow the maintenance procedures given throughout this manual. Failure to perform the service and
maintenance or follow the directions in this manual could result in damage to the boiler or system,
resulting in severe personal injury, death, or substantial property damage.
ANNUAL START-UP
User’s Information Manual
F I R E T U B E C O M B I
™
