Daikin Packaged Gas / Electric Unit DFG0724DL

WARNING! TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK, DO NOT REMOVE ANY INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY ADJUSTMENT. CONTACT A QUALIFIED SERVICER AT ONCE IF AN ABNORMAL FLAME SHOULD DEVELOP

All flue product carrying areas of the furnace, its vent system, and main burners should be examined by a qualified service agency before the start of each heating season

This examination is necessary for continued safe operation. Particular attention should be given to deterioration from corrosion or other sources

This examination is accomplished in the following manner

1. Disconnect power to the unit and remove furnace section access panel

a. Disconnect the wires from the gas valve after noting which wires are connected to each terminal

b. Disconnect wires from the flame rod and ignition electrode

c. Disconnect the gas piping at the union

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

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;

Describe the condition of the filter

Sign off on the filter inspection

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

Upload a photo of the old filter

Upload a photo of the new 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