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2 Maintenance schedule
5
ƽ 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.
User’s Information Manual
Service technician
(see the Knight XL Service Manual)
General:
• Address reported problems
• Inspect interior; clean and vacuum
if necessary
• Clean condensate trap and fi ll with
fresh water
• Check for leaks (water, gas, fl ue,
condensate)
• Verify fl ue and air lines in good
condition and sealed tight
• Check system water pressure/
system piping/expansion tank
• Check control settings
• Check ignition and fl ame sense
electrodes (sand off any deposits;
clean and reposition)
• Check wiring and connections
• Perform start-up, checkout and
performance verifi cation per Sec-
tion 10 in the Knight XL Installation
and
Operation manual
• Flame inspection (stable, uniform)
• Flame signal (at least 10
microamps at high fi re)
• Clean the heat exchanger if fl ue
temperature is more than 54°F
(30°C) 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 pipng
• Check air piping
• Check air and vent a
• termination screens
• Check relief valve
• Check condensate drain
system
• Check air vents
Periodically
• Test low water cutoff
(if used)
• Reset button (LWCO)
Every
6 months
• Check boiler piping
(gas and water) for leaks
• Operate relief valve
End
of season
months
• Shut boiler down
(unless boiler is used for
domestic hot water)
ANNUAL START-UP