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