Crestron electronic 2.5, 3.5, 1.5 Maintenance Maintenance and annual startup, Service technician

Installation & Operation Manual

11 Maintenance Maintenance and annual startup

Table 11A 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.
	• Flame inspection (stable, uniform)
	• Check both flame signals (at least 10
	microamps at high fire)
	• Clean the heat exchanger
	• Test low water		cutoff (reference		the
	Crest Service Manual).
	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

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