Lochinvar 3.5 Maintenance Maintenance and annual startup, Service technician, Owner maintenance

Service Manual

2 Maintenance

Maintenance and annual startup

Table 2A Service and Maintenance Schedules

Service technician

(see the following pages for instructions)

	General:
	•	Address reported problems, if any
	• 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
UP-		piping/expansion tank
	• Check control settings
START	• Check the ignition and both flame sense
		electrodes (sand off any deposits; clean
ANNUAL		and reposition)
	• Check wiring and connections
	• Perform		start-up		checkout	and
		performance verification per Section 9 of
		the Crest Installation and Operation
		Manual.
	• Flame inspection (stable, uniform)
	• Check both flame signals (at least 10
		microamps at high fire)
	• Test low water cutoff.
	If	combustion		or	performance
	indicate need:

•Clean heat exchanger

•Remove and clean burner using compressed air only

•Clean the blower wheels

Owner maintenance

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

31