303.14701 - Sears/ Kenmore Central Humidifier

303.14701
Owners Manual
Maintenance

Maintenance

CLEANING AND SERVICE INSTRUCTIONS:

CAUTION: Before performing service, inspection, or maintenance:

1. Turn off electricity at furnace, humidifier, and humidistat.
2. Turn off water at humidifier saddle valve.
3. Wear safety glasses.

This humidifier is an appliance that evaporates water in large quantities. The dissolved minerals normally found in tap water in varying degrees are left as lime deposits on the media pad and other parts in contact with the water. Deposit build up will reduce humidifier output. Annual cleaning and replacement of media pad is recommended. SInce water conditions vary, it may be necessary to service more or less often. Establish your own service schedule. Ease of service has been foremost in the design of this humidifier following the steps below:

Servicing the media pad

1. Lift off front panel

2. Remove media pad by lifting bottom edge up slightly and pivoting out. Inspect and replace if badly blocked with mineral deposits. (media pad available from Sears, Stock No. 42-14711.)

3. If necessary, clean the inside of humidifier case (especially lower drain area) with water and vinegar solution, detergent and water, or Sears All-Purpose Humidifier Cleaner, Stock No. 42-14713.

4. Install media pad by sliding top edge up and pivoting bottom edge into position.

5. Replace front panel.

6. Turn on water and electricity and test operation by observing if water is flowing to drain while furnace is running and humidistat is set to 'test' position.

7. Set humidistat according to outdoor temperature as instructed on operating instruction label. Unit is back in operation.

Periodic preventative maintenance

Periodic inspection and preventative maintenance is important for continued, efficient operation of the humidifier. Refer to exploded view for location of components.

CAUTION: Be sure water and electricity are turned off as advised above.

Distribution trough

1. Lift off front panel.

2. Loosen the (2) #6 outer screws on top of the humidifier. Remove and clean the distribution trough and pad set. Replace pad set (Pt No. 35587901) if badly soiled.

3. Reassemble pad set and distribution trough and secure with the (2) #6 screws.

Drain tube

1. Using spring hose clamp pliers, expand hose clamp and remove drain tube.

2. Clear internal lime and calcium deposits by flexing or striking on hard surface.

3. Flush with water under pressure.

4. Reinstall drain tube and hose clamp.

Solenoid water filter

1. Remove water line at solenoid

2. Remove nylon elbow inlet fitting filter/ orifice assembly from solenoid valve by unscrewing (turn counter clockwise)

3. Check for clogging by blowing through one end. If clogged, replace with new fitting assembly, Part No. 05291201.

CAUTION: This special fitting contains a brass filter and flow control orifice which must be in place for proper operation of your humidifier. (If not installed, too much water will flow and may cause leaking.)

4. Reinstall the nylon elbow inlet fitting filter/ orifice assembly by carefully aligning the fine thread end containing the flow control orifice into the solenoid valve and screwing in (clockwise) until moderately tight.

5. Reinstall water line.

6. Replace front panel.

7. Turn on water and electricity and test operation by observing if water is flowing to drain while furnace is running and humidistat is set to 'test' position. Check for leaks and tighten fitting as required.

8. Set humidistat according to outdoor temperature as indicated on operation instruction label. Do not leave in 'test' position. Your humidifier should now be ready for many more months of trouble free operation.

Summer shut down
Turn humidistat dial counter-clockwise to minimum setting position, close saddle valve, close bypass damper, and clean per above.(As a reminder, you might want to put a tag or sticker on the unit indication it has been shut down for the summer and will require start up in the fall.)

Fall start up
Open saddle valve and open bypass damper. Test operation by observing if water is flowing to drain while furnace is running and humidistat dial is set to 'test' position. Set humidistat according to outdoor temperature as indicated on operation instruction label. Unit is back in operation.

 

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