Lochinvar 81-286 Maintenance Maintenance and annual startup, Service technician, Instructions

Service Manual

2 Maintenance

Maintenance and annual startup

Table 2-1Service 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)
UP	• Verify flue and air lines in good condition
	and sealed tight
-
START	• Check	system water			pressure/system
	piping/expansion tank
ANNUAL	• Check control settings
	and reposition)
	• Check ignition and flame sense
	electrodes (sand off any deposits; clean
	• Check wiring and connections
	• Perform		start-up		checkout	and
	performance verification per Section 10
	in the Knight Installation and Operation
	Manual.
	• 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 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 Knight User’s Information Manual for

instructions)

• Check boiler area

Daily

•Check pressure/temperature gauge

•Check vent piping

•Check air piping

Monthly

•Check air and vent termination screens

•Check relief valve

•Check condensate drain system

•Check air vents

Periodically	• Test low water cutoff (if used)
	• Reset button (low water cutoff)
	• Check boiler piping (gas and
Every	water) for leaks
6 months	• Operate relief valve
	• Shut boiler down (unless boiler
End	used for domestic hot water)
of season
months

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