Lochinvar 400-801 operation manual Maintenance Maintenance and annual startup, Service technician

Outdoor Knight XL Installation & Operation Manual

9 Maintenance

Maintenance and annual startup

Table 9A Service and Maintenance Schedules

Service technician

(see the following pages for instructions)

	General:
	• Address 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 passage ways in good
	condition and sealed tight
	• Check	system	water	pressure/system
UP	piping/expansion tank
	• Check control settings
-
START	• Check	ignition	and	flame sense
	electrodes (sand off any deposits; clean
	and reposition)
ANNUAL	• Check wiring and connections
	• Perform start-up checkout and performance
	verification per Section 7.
	• Flame inspection (stable, uniform)
	• Flame signal (at least 10 microamps at
	high fire)
	• Clean the heat exchanger if flue 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 the Outdoor Knight XL User’s Information

Manual for instructions)

Daily	• Check boiler area
	• Check pressure/temperature
	gauge
	• Check air and vent termination
Monthly	screens
	• Check relief valve
	• Check condensate drain system
	• Test low water cutoff (if used)
Periodically	• Reset button (low water cutoff)
Every	• Check boiler piping (gas and
	water) for leaks
6 months	• Operate relief valve
End	• Shut boiler down (unless boiler
of season
	used for domestic hot water)
months

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