Lennox TSA*H4: Maintenance

At the beginning of each cooling season, the system should be checked as follows:

• Make sure power is off before cleaning. Clean and inspect outdoor coil. The coil may be flushed with a water hose.

• The outdoor coil is protected by an inner mesh screen and a wire cage (see figure 16). If debris has collected between the mesh screen and the coil and cannot be dislodged by spraying unpressurized water from inside coil surface to the outside, the mesh may be removed by first removing the top of the unit which will allow for removal of the wire cage

• Then, using pliers to grip the head of the push pins, pull straight out to extract the push pins along one side of the coil. If necessary, remove the push pins along the back of the unit; it is usually unnecessary to fully remove the inner mesh screen.

• Drape the mesh screen back and wash the coil. When all the debris has been removed from the coil, reinstall the mesh screen by positioning it in its original position and reinserting the push pin. No tool is required to push the pin back into the same slot in the fins.

• If the push pin is loose and tends not to stay in place, brush the fins with a fin brush (22 fins/in). Line up the push pin a couple fins to the right or left of the original hole and re−insert the pin.

• Outdoor fan motor is prelubricated and sealed. No further lubrication is needed.

• Visually inspect connecting lines and coils for evidence of oil leaks.

• Check wiring for loose connections.

• Check for correct voltage at unit (unit operating).

• Check amp−draw outdoor fan motor.

INDOOR UNIT

• Clean or change filters.

• Lennox blower motors are pre-lubricated 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.

Outdoor Coil

• Clean coil if necessary.

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

• Check condensate line and clean if necessary.