Maintenance Maintenance And Annual Startup - A.O. Smith APW015DW Installation & Service Manual

9
Maintenance
Maintenance and annual startup
The APW water heater requires regular routine maintenance to keep the unit operating at optimum efficiency. The manufacturer
recommends that the tasks listed in Table 9A - Scheduled Maintenance Actions, be performed at the periodic intervals specified.
Table 9A Scheduled Maintenance Actions
Interval
Weekly
Quarterly
Quarterly / Semi-
Annually
Semi-Annually
Annually
Periodic
For specific maintenance instructions reference the CD provided with the APW.
NOTICE
Indirect Plate Water Heater Installation & Service Manual
Double-Wall Only: Check plate packs for leakage.
Every 3 months, check the operation of the over-temp switch in the electronic
control system control box.
After the first 3 months, check the operation of the control valve in the boiler
water piping. Then check operation every 6 months.
Every 6 months, check the strainers on both the boiler water and domestic water
piping side.
Once each year, check the temperature sensors.
Once each year, check the operation of the recirculation pump.
Periodic cleaning of the heat exchanger may be necessary, depending on
conditions and settings.
Maintenance
27