General • Inspections

Daikin RoofPak Forced-Draft Gas Furnace: Annual Maintenance

This annual procedure is for checking all electrical connections, including field and factorymade connections, for tightness at least once per year or operating season. Any filters in the airstream must be kept clean so that adequate airflow is maintained.

MaintainX

08/10/2022

Daikin RoofPak Forced-Draft Gas Furnace: Annual Maintenance

Planned maintenance is the best way to avoid unnecessary expense and inconvenience. Have this system inspected at regular intervals by a trained and experienced service technician. The following service intervals are typical for average situations but will have to be adjusted to suit your particular circumstances.

Fuel pressure settings, control settings, and linkage adjustments should be made only by persons thoroughly experienced with the burner and control system, and must not be tampered with by persons without such experience.

Always replace covers on burner controls and boxes as the electrical contacts are sensitive to dust and dirt. Perform maintenance of flame safeguard, controls, gas valves, and other such components in accordance with instructions contained in the manufacturer’s bulletins

Annual:

Gas Train - Check all valves, piping and connections for leakage. Remove burner gun assembly. Inspect and clean pilot burner, flame rod, ignition electrode, main burner discs, and blast tube. Check tightness of linkage fasteners and bolts that could work loose from vibration and movement.
Combustion - Check quality of combustion. Test CO2 and CO and look for irregularities in fire shape. If combustion characteristics have changed since the last test, determine the cause. Changes in input changes in the BTU content of gas being supplied, reduced combustion air due to a dirty blower wheel, or flue passages in need of cleaning can cause changes in CO2 reading. When a readjustment seems necessary, do not make the adjustment without first trying to determine if the required change is not an indication that something else is in need of correction.
Flame Safeguard - Perform a flame failure check and pilot turndown test. See control manufacturer’s bulletin for further information.
Motor - Motor life can be increased by proper oiling. There are provisions in both end shields for relubrication. Re-oil each bearing with 150 drops (approximately 1 teaspoon) SAE-20 oil.
Summer Shutdown - If the burner is to be out of service for the summer, turn off the burner control switch and close the manual gas cocks.
Condensate Drain - Inspect the Rear Condensate Drain for blockage.

Source: MaintainX (Community Member)

Fuel pressure settings, control settings, and linkage adjustments should be made only by persons thoroughly experienced with the burner and control system, and must not be tampered with by persons without such experience.

Always replace covers on burner controls and boxes as the electrical contacts are sensitive to dust and dirt. Perform maintenance of flame safeguard, controls, gas valves, and other such components in accordance with instructions contained in the manufacturer’s bulletins

Annual:

Gas Train - Check all valves, piping and connections for leakage. Remove burner gun assembly. Inspect and clean pilot burner, flame rod, ignition electrode, main burner discs, and blast tube. Check tightness of linkage fasteners and bolts that could work loose from vibration and movement.

Flame Safeguard - Perform a flame failure check and pilot turndown test. See control manufacturer’s bulletin for further information.

Motor - Motor life can be increased by proper oiling. There are provisions in both end shields for relubrication. Re-oil each bearing with 150 drops (approximately 1 teaspoon) SAE-20 oil.

Summer Shutdown - If the burner is to be out of service for the summer, turn off the burner control switch and close the manual gas cocks.

Condensate Drain - Inspect the Rear Condensate Drain for blockage.