Lochinvar Shield SNA285-125 - Manual (Page 53)

53
12
Maintenance
Maintenance and annual startup
Table 12A 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 lines in good condition
and sealed tight
• Check system water pressure/system
piping/expansion tank
• Check control settings
• Check ignition and flame sense electrodes
(sand off any deposits; clean
and reposition)
• Check wiring and connections
• Perform start-up checkout and
performance verification per Section 10
in this 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
ANNUAL
ST
ART
-UP
Owner maintenance
Daily
• Check water heater area
Monthly
• Check vent piping
• Check air piping
• Check relief valve
• Check condensate drain system
Every
6 months
• Check water heater piping (gas
and water) for leaks
• Operate relief valve
Installation & Service Manual TM