About Your White-Rodgers Humidifier
Principle of Operation
Your
You’ll notice that the evaporator pad has many holes and connecting strands. These significantly increase the surface from which water can evaporate. This warm air evaporative process, is intensified by the warm air from your furnace, this is what makes your humidifier perform efficiently.
The system is controlled by a humidistat that monitors the relative humidity in your home, and activates or deactivates the humidifier accordingly. Water evaporated from the humidifier leaves behind all its impurities (e.g., calcium, iron, lime, bacteria, etc.), thus creating a purified vapor that doesn’t pollute your indoor air. As a result, your home will be free from these contaminants… and your family will almost certainly be healthier and more comfortable.
How Your Humidifier Works. . .
Model HFT2100 & HFT2700. When your home’s air is dryer than the selected level of humidity, the humidistat activates the
Model HFT2900FP.
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Operating Instructions
Your new humidifier is controlled by a humidistat that is installed either on the cold air return of your furnace, or on an interior wall of your home. The recommended settings for this control may seem illogical until you understand the principle behind them....
As you can see from the Humidistat Settings chart below, the recommended setting goes down as the outside temperature
your furnace’s thermostat operates. To understand the reason for this, think of what happens to an
(or condensation) forms on the outside of the glass. Condensation occurs because the hot summer air contains humidity, and the cold surface of the glass cools the surrounding air. Once cooled, the air molecules become smaller and can no longer hold as much moisture. The result is that water droplets accumulate on the glass.
The same principle applies to your home during the winter, when the outside temperature drops and the inside air remains warm and humid. In order to retain moisture in your home and prevent condensation, it’s necessary to turn your humidistat down as outside temperatures fall.
Recommended Humidistat Settings
At Outside | Recommended | At Outside | Recommended | ||
Temperature | Setting | Temperature | Setting | ||
15% | +10°F. | 30% | |||
20% | +20°F. | – 7°C. | 35% | ||
0°F. | 25% | Above 20° | 40% |
Checking the Humidifier for Proper Operation
To check your humidifier for proper operation after servicing or winter
1.Turn the furnace blower to the OFF position, making sure the solenoid valve is closed.
2.Turn the furnace blower ON and set the humidistat to the full on position. The solenoid valve should open.
3.Make sure the water flow from the solenoid falls directly into the distribution tray. (The solenoid valve should limit the flow to approximately four gallons per hour at a line pressure of 60 P.S.I.)
4.To avoid overflow, run the humidifier long enough to be sure the drain tubing is carrying water to the waste line.
!WARNING: DO NOT SET HUMIDITY CONTROL TOO HIGH. Use the recommended settings shown on humidistat nameplate.
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