Nordic AH4P Series, Service Manual

Page: 16 / 30

5-Jul-2022 Page 16 002596MAN-01
Routine Maintenance
MAINTENANCE SCHEDULE
Item Interval Procedure
Air Filter
6 months Inspect for dirt. Replace if necessary.
Condensate
Drain
1 year Inspect for clogs. Clean if necessary.
Water to Air
Heat Exchanger
Fin contamination:
Inspect outside surface of fins for dirt that has gotten
by air filter, perhaps due to not changing filter at rec-
ommended interval. Clean using cleaning solution or
high pressure water or air.
Hydronic circuit fouling:
Disconnect the hydronic loop and flush heat ex-
changer with a calcium removing solution. Generally
not required for closed loop or cold water open loop
systems; whenever system performance is reduced
for warm water open loop systems (unusual).
When experiencing
performance degrada-
tion that is not ex-
plained by low airflow