Lochinvar WH 55 - 399 manual Maintenance schedule Service technician, Owner maintenance

User’s Information Manual

2 Maintenance schedule

Service technician

(see the Knight Wall Mount Service Manual)

	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
UP	and sealed tight
	• Check	system water pressure/system
-	piping/expansion tank
START	• Check control settings
	• Ignition and flame sense electrodes
ANNUAL	(sand	off	any deposits;		clean	and
	reposition)
	• Wiring and connections
	• Perform		start-up	checkout		and
	performance verification per Section 10
	in the Knight Wall Mount Installation and
	Operation 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)

• 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
Periodically	• Test low water cutoff (if used)
	• 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

￿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.

5