Lennox SL18XC1 Series Units: Routine Maintenance

DEALER

Outdoor Unit

Maintenance and service must be performed by a qualified installer or service agency. At the beginning of each cooling season, the system should be checked as follows:

Clean and inspect outdoor coil (may be flushed with a water hose). Ensure power is off before cleaning.
Outdoor unit fan motor is pre-lubricated and sealed. No further lubrication is needed.
Visually inspect all connecting lines, joints and coils for evidence of oil leaks.
Check all wiring for loose connections.
Check for correct voltage at unit (unit operating).
Check amp draw on outdoor fan motor. Motor Nameplate:_________ Actual:__________.
Inspect drain holes in coil compartment base and clean if necessary.

NOTE ‐ If insufficient heating or cooling occurs, the unit should be gauged and refrigerant charge should be checked.

Outdoor Coil

It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, fertilizers, fluids that may contain high levels of corrosive chemicals such as salts)

Outdoor Coil — The outdoor coil may be flushed with a water hose.

Outdoor Coil (sea coast) — Moist air in ocean locations can carry salt, which is corrosive to most metal. Units that are located near the ocean require frequent inspections and maintenance. These inspections will determine the necessary need to wash the unit including the outdoor coil. Consult your installing contractor for proper intervals/procedures for your geographic area or service contract.

Indoor Unit

Clean or change filters.
Lennox blower motors are prelubricated and permanently sealed. No more lubrication is needed.
Adjust blower speed for cooling. Measure the pressure drop over the coil to determine the correct blower CFM. Refer to the unit information service manual for pressure drop tables and procedure.
Belt Drive Blowers - Check belt for wear and proper tension.
Check all wiring for loose connections.
Check for correct voltage at unit. (blower operating)
Check amp draw on blower motor. Motor Nameplate:_________ Actual:__________.

Indoor Coil

Clean coil if necessary.
Check connecting lines, joints and coil for evidence of oil leaks.
Check condensate line and clean if necessary.

Start-Up and Performance Checklist

Lennox SL18XC1 Series Units: Routine Maintenance

Lennox SL18XC1 Series Units: Routine Maintenance

DEALER

Outdoor Unit

Maintenance and service must be performed by a qualified installer or service agency. At the beginning of each cooling season, the system should be checked as follows:

Clean and inspect outdoor coil (may be flushed with a water hose). Ensure power is off before cleaning.

Outdoor unit fan motor is pre-lubricated and sealed. No further lubrication is needed.

Visually inspect all connecting lines, joints and coils for evidence of oil leaks.

Check all wiring for loose connections.

Check for correct voltage at unit (unit operating).

Check amp draw on outdoor fan motor. Motor Nameplate:_ Actual:__.

Inspect drain holes in coil compartment base and clean if necessary.

NOTE ‐ If insufficient heating or cooling occurs, the unit should be gauged and refrigerant charge should be checked.

Outdoor Coil

It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, fertilizers, fluids that may contain high levels of corrosive chemicals such as salts)

Outdoor Coil — The outdoor coil may be flushed with a water hose.

Indoor Unit

Clean or change filters.

Lennox blower motors are prelubricated and permanently sealed. No more lubrication is needed.

Adjust blower speed for cooling. Measure the pressure drop over the coil to determine the correct blower CFM. Refer to the unit information service manual for pressure drop tables and procedure.

Belt Drive Blowers - Check belt for wear and proper tension.

Check all wiring for loose connections.

Check for correct voltage at unit. (blower operating)

Check amp draw on blower motor. Motor Nameplate:_ Actual:__.

Indoor Coil

Clean coil if necessary.

Check connecting lines, joints and coil for evidence of oil leaks.

Check condensate line and clean if necessary.

Start-Up and Performance Checklist

DEALER

Outdoor Unit

Maintenance and service must be performed by a qualified installer or service agency. At the beginning of each cooling season, the system should be checked as follows:

Clean and inspect outdoor coil (may be flushed with a water hose). Ensure power is off before cleaning.

Outdoor unit fan motor is pre-lubricated and sealed. No further lubrication is needed.

Visually inspect all connecting lines, joints and coils for evidence of oil leaks.

Check all wiring for loose connections.

Check for correct voltage at unit (unit operating).

Check amp draw on outdoor fan motor. Motor Nameplate:_________ Actual:__________.

Inspect drain holes in coil compartment base and clean if necessary.

NOTE ‐ If insufficient heating or cooling occurs, the unit should be gauged and refrigerant charge should be checked.

Outdoor Coil

It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, fertilizers, fluids that may contain high levels of corrosive chemicals such as salts)

Outdoor Coil — The outdoor coil may be flushed with a water hose.

Indoor Unit

Clean or change filters.

Lennox blower motors are prelubricated and permanently sealed. No more lubrication is needed.

Adjust blower speed for cooling. Measure the pressure drop over the coil to determine the correct blower CFM. Refer to the unit information service manual for pressure drop tables and procedure.

Belt Drive Blowers - Check belt for wear and proper tension.

Check all wiring for loose connections.

Check for correct voltage at unit. (blower operating)

Check amp draw on blower motor. Motor Nameplate:_________ Actual:__________.

Indoor Coil

Clean coil if necessary.

Check connecting lines, joints and coil for evidence of oil leaks.

Check condensate line and clean if necessary.

Start-Up and Performance Checklist

Check amp draw on outdoor fan motor. Motor Nameplate:_ Actual:__.

Check amp draw on blower motor. Motor Nameplate:_ Actual:__.