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Figure 68. Gain access to both sides of coil shown for sizes 8, 14, 17, 21, 25, and 30
For MI fan vertical unit, access via the coil door, see
Figure 69. For vertical MI fan, gain access via the coil
door
3. Wearing the appropriate personal protective equipment,
use a soft brush to remove loose debris from both sides of
the coil.
4. Install a block-off to prevent spray from going through the
coil and into a dry section of the unit and/or system
ductwork.
CLCH-SVX009L-EN
5. Mix a high-quality coil cleaning detergent with water
Figure
69.
Note: If the detergent is strongly alkaline after mixing (PH 8.5
6. Place the mixed solution in a garden pump-up sprayer or
7. Spray the leaving air side of the coil first, then the entering
8. Thoroughly rinse both sides of the coil and the drain pan
Note: Coil access door
removed for clarity
9. Repeat steps 6 and 7 as necessary.
10. Straighten any coil fins that may have been damaged
11. Confirm the drain line is open following the cleaning
12. Allow the unit to dry thoroughly before putting it back into
13. Replace all panels and parts and restore electrical power
14. Be careful any contaminated material does not contact
according to the manufacturer's instructions.
or higher), it must contain an inhibitor. Follow the
cleaning solution manufacturer's instructions
regarding the use of the product.
high-pressure sprayer. If a high pressure sprayer is to be
used:
– Maintain minimum nozzle spray angle of 15 degrees.
– Spray perpendicular to the coil face.
– Keep the nozzle at least 6 inches from the coil.
– Do not exceed 600 psi.
air side.
with cool, clean water.
during the cleaning process.
process.
service.
to the unit.
other areas of the unit or building. Properly dispose of all
contaminated materials.
Routine Maintenance
Access panel
can now be
removed
67
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