Daikin Packaged Gas / Electric Unit DFG0363D6

CAUTION! TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE RETURN AIR SYSTEM

Dirty filters are the most common cause of inadequate heating or cooling performance

Filter inspection should be made at least every two months; more often if necessary because of local conditions and usage;

Is the air filter installed in the return air system?

If the air filter is dirty, replace it immediately.

Sign off on the filter inspection

Warning: This procedure should be performed by trained personnel only!

Is the flame sensor visibly dirty?

If the flame sensor is dirty, proceed with the cleaning. If not, report the condition to the maintenance team.

Upload a photo of the flame sensor before cleaning

Enter the microamp signal after cleaning

Sign off on the flame sensor cleaning

NOTE: This will involve removing and reinstalling the heat exchanger door on the unit, which is held by two screws. If you are uncertain about your ability to do this, contact a qualified servicer. If a strong wind is blowing, it may alter the airflow pattern within the unit enough that an inspection of the burner flames is not possible.

If the wind is blowing strongly, postpone the inspection.

Was the heat exchanger door successfully removed?

Was the burner flame visually checked?

Was the heat exchanger door successfully reinstalled?

Sign off on the burner flame check

CAUTION! TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE RETURN AIR SYSTEM

Every application may require a different frequency of replacement of dirty filters

Filters must be replaced at least every three months during operating seasons

Dirty throwaway filters should be discarded and replaced with a new, clean filter

Sign off on the filter replacement

CAUTION! Prior to servicing MCHE, be sure to disconnect the power supply and use lock-out methods to prevent the power from accidentally being turned on

During periods when the MCHE is not operated for longer than a week, the MCHE must be completely cleaned following the cleaning procedure. This practice must also be performed during short shut-down periods where corrosive deposits accumulate on the MCHE

Relative to tube & fin heat exchangers, MicroChannel heat exchanger coils tend to accumulate more dirt on the surface of the coil and less dirt inside the coil, making them easier to clean

Remove surface dirt, leaves, fibers, etc. with a vacuum cleaner (preferably with a brush or other soft attachment rather than a metal tube), compressed air blown from the inside out, and/or a soft bristle (not wire!) brush. Do not impact or scrape the coil with the vacuum tube, air nozzle, etc

STEP 2: Rinse the coil by following procedure

1. Rinse the coil by approved MCHE cleaner first, or rinsing by water directly