303.14701 - Sears/ Kenmore Central Humidifier

303.14701
Owners Manual
Operation

Operation

1. Set knob to the lowest temperature predicted for a 24 hour period. Because of differences in house construction you may want to try a higher or lower setting to achieve proper humidity.

2. Change knob setting as outdoor temperature changes occur.

WARNING: DO NOT LEAVE KNOB SET IN 'TEST' POSITION ABOVE '+20' OR HUMIDIFIER WILL RUN CONSTANTLY.

IF SWEATING OF WINDOWS OR WALLS OCCURS OR IF AIR IS TOO DRY:
Check dial setting. Indicator should point to the lowest 24 hour temperature. If setting does not agree, readjust knob to proper number and wait 24 hours for sweating to stop. If dial setting was correct and conditions have not changed, rotate knob back and forth from TEST to MINIMUM HUMIDITY SETTING. If humidifier goes ON and OFF, control is operating properly.

AIR CONDITIONING - IMPORTANT:
If your furnace has air conditioning (cooling), close the damper completely during summer months and turn the humidistat to the Minimum Humidity setting. BE SURE TO OPEN DAMPER DURING HEATING SEASON AND RESET THE HUMIDISTAT.

WATER FLOW RATE:
At standard water line pressure of 50-60 PSI (pounds per square inch), water will flow through humidifier at approximately four (4) gallons per hour. About 0.7 gallons per hour of the four will be evaporated, leaving 3.3 gallons to be drained away. Since the furnace only runs an estimated 30-40% of the heating season, and the humidifier is wired to operate only when the furnace blower, and only when humidity is required, the actual amount of water drained per day is much less than would be expected.

SPLASH INSIDE HUMIDIFER:
This humidifier depends on the difference of air pressure between the supply air plenum and the return air plenum to propel air through the humidifier. Some furnaces have higher pressure than others. This could result in air traveling at high speed through the humidifier. This can cause droplets of water to be picked up and splashed against the inside of the humidifier case. Eventually a coating of lime will build up. It could, in extreme cases, cause leaking of water from the humidifier.

TO REDUCE SPLASH:
Partially close the damper located in the collar on the return air plenum. Some experimenting may be necessary to find the proper setting.

 

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