25
Unit Start Up
• Check that supply voltage matches nameplate data.
• Fuses, breakers and wire size are correct.
• Confirm that the 15kW or 20kW auxiliary heat kit
is wired correctly (see "Electrical Data" section if
applicable).
• Low voltage wiring is complete.
• Piping is complete and water system is cleaned
and
flushed.
• Air is purged from the closed loop system.
• Isolation valves are open, water control valves or pumps
are
wired.
• Condensate line is open and correctly pitched.
• Transformer switched to 208v if applicable.
• DIP switches are set correctly.
• Blower rotates freely.
• Blower speed is correct.
• Air filter/cleaner is clean and in position.
• Service/access panels are in place.
• Return air temperature is between 50-80°F heating and
60-95°
cooling.
• Check air coil cleanliness to insure optimum performance.
Clean as needed according to maintenance guidelines.
To obtain maximum performance the air coil should be
cleaned before startup. A 10 percent solution of
dishwasher detergent and water is recommended for
both sides of coil. A thorough water rinse should follow.
Maintenance Filters
Filters must be clean to obtain maximum performance. They
should be inspected monthly under normal operating conditions
and be replaced when necessary. Units should never be operated
without a filter. Always replace the filter with the same type as
originally furnished.
Condensate Drain
In areas where airborne bacteria produce slime in the drain pan, it
may be necessary to treat chemically to minimize the problem. The
condensate drain can pick up lint and dirt, especially with dirty filters.
Blower Motors
The ECM motor is equipped with sealed ball bearings and requires
no periodic lubrication.
Air Coil
The air coil must be cleaned to obtain maximum performance.
Check once a year under normal operating conditions and, if dirty,
brush or vacuum clean. Care must be taken not to damage the
aluminum fins while cleaning.
Caution: Fin edges are sharp.
ASTON SERIES AIR HANDLER INSTALLATION MANUAL
