IM 1267-7 • PRECISELINE AIR HANDLER 106 www.DaikinApplied.com
1. For maximum performance, the coil must be clean.
Check once a year under normal operating conditions
and brush or vacuum clean if necessary. Use a chemical
coil cleaner on multiple row coils. Read and follow the
chemical cleaner instructions since some cleaners may
while cleaning.
2. Drain pans in any air conditioning unit may have
some moisture, with growth of organisms possible
due to airborne spores and bacteria. Clean drain pans
periodically to prevent build-up from plugging the drain
clean to prevent the spread of disease. Cleaning should
3. Dirt and lint can clog the condensate drain, especially
1. Remove coil section access panel.
2. Drain the coils.
3. Disconnect unions on supply and return of heating and
cooling coils inside cabinet. Field piping does not need to
be disconnected.
Figure 110: Heating and Cooling Coil Unions
4. Disconnect any valve, damper, or electric heat wires that
may interfere with removing the coil.
5. Slide the coil out by pulling on the header tube. The coil
is not fastened in cabinet. If unit is equipped with factory
installed valve package, part of the valve package will be
removed with coil.
Figure 111: Slide Coil Out
6. For four pipe units, the cooling coil is attached to the
preheat or reheat coil. To separate the coils remove the
screws along the bottom edge of the header end plate,
on each end of the coil and the connectors.
Figure 112: Four Pipe Unit, Detaching Coils
7. For units with the electric heat option, the electric
heat rack is attached to the cooling coil in the preheat
position. To separate the electric heat rack from the
cooling coil remove the screws on each end of the coil,
and the connectors.
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