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This .Pdf document is for informational purposes only and contains an Installation
Template. The Template in this .Pdf document is not to scale. Do not use for sizing
purposes.
Continue to next pages for Template instructions, Owners Guide and Humidistat Instructions.
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MODEL HFT2100,
HFT2700, HFT 2900FP
HOME HUMIDIFIERS
OWNER’S
MANUAL
Includes Safety, Operating and Maintenance
Instructions
CAUTION: READ THESE INSTRUCTIONS THOROUGHLY
BEFORE SERVICING
FILL IN FOR HOME OWNER REFERENCE:
Model No. ꢀ Model HFT 2100 ꢀ Model HFT 2700 ꢀ Model 2900FP
Installation Date
SAVE THIS MANUAL FOR FUTURE REFERENCE
The Emerson logo is a trademark and a service mark of Emerson Electric Co.
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Contents
Introduction
Homeowner Tips
A. In a home that has had little or no humidification, allow approximately three
weeks for your new humidifier to attain the desired humidity level. Your furniture,
woodwork, carpeting, plaster, houseplants and family members all need time to
absorb lost moisture.
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5
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Principle of Operation
Operating Instructions
Checking for Proper Operation
Maintenance for Models HFT2100, HFT2700 and HFT2900FP
Water Hardness and Maintenance Schedule
Homeowner Tips
B. To eliminate drafts that allow heat and humidified air to escape, keep fireplace
dampers closed when not in use.
Warranty
Notes:
WARNING: Setting your humidity control higher than the listed setting could
cause condensation that would damage your home. If excessive moisture
appears on windows or walls, reduce humidity setting at humidistat enough
to eliminate condensation. If the situation continues, turn off water valve and
the humidistat until condensation is gone.
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Maintenance Instructions for HFT2100,
HFT2700 & HFT2900FP
Congratulations…
… on your purchase of a White-Rodgers High-Capacity Flow-Thru Humidifier—
one of the finest home humidifiers made!
Danger - To Avoid Hazard of Electrical Shock or Burn Turn Off
Power Supplying This Equipment Before Servicing.
1. Shut off water supply.
Caring for Your Humidifier
Please take a few minutes to read this booklet. It will familiarize you with the
many features and benefits of your new humidifier, and aid you in understanding
the routine maintenance that will ensure many years of efficient operation.
2. Remove the humidifier cover by turning the screw located at the bottom of the
cover and pulling the cover out toward you.
If, at some point, you need parts or service to maintain the superior performance of
your humidifier, follow these simple procedures:
3. Tilt out the distribution tray and evaporator pad assembly.
4. All plastic and metal parts (except electrical parts and components) can be
washed in humidifier cleaner or a 50% solution of vinegar and water.
• Contact the heating and air conditioning contractor who installed your unit.
Often, this information can be found on a label attached to your humidifier or
heating system.
• If no label is found, look in the yellow pages of your phone book under Heating
& Air Conditioning Contractors.
• Finally, if these attempts for parts or service fail, write or call White-Rodgers at
the address or phone number printed on the front inside cover or page 5 of this
booklet.
5. Replace evaporator media, if cleaning is not satisfactory. This unit also
contains a one piece wick. This wick must be changed along with the evaporator
pad. The wick can be changed very easily by simply lifting out the old one and
replacing it with the new one provided with the evaporator pad.
6. Evaporative media should be replaced at least once a year (once each heating
season).
7. Wipe any loose sediment from the water tray (make certain no particles are
allowed to plug the drain hole).
Water Hardness
and Maintenance Schedule
Your humidifier will accumulate minerals such as calcium and lime after operating
for a short period (accumulation of minerals is a sure sign the humidifier is producing
humidity). The amount of accumulation is dependent on the hardness of the water
supply in your area. Therefore the time between cleaning is unpredictable.
NOTE: Excessive buildup of these minerals is detrimental to internal parts as well as
evaporative efficiency. Refer to the maintenance instructions above to achieve years of
satisfactory performance from your White-Rodgers Humidifier.
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1
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Operating Instructions
About Your White-Rodgers Humidifier
Principle of Operation
Your White-Rodgers Humidifier uses the same method of evaporation you observe in
nature after a summer shower. Mother Nature’s technique is simple: warm air passes
over a thin layer of water spread over a large area, causing the water to evaporate
and raising the level of humidity. Your humidifier creates the same natural response
with an evaporator pad that dispenses water evenly in front of a warm air stream.
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 decreases—just the opposite of how
your furnace’s thermostat operates. To understand the reason for this, think of what
happens to an ice-cold drink when it’s outside on a hot summer day… water
(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.
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.
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
Temperature
+10°F. –12°C.
+20°F. – 7°C.
Above 20° –7°C.
Recommended
Setting
30%
Temperature
–20°F. –29°C.
–10°F. –23°C.
0°F. –18°C.
Setting
15%
20%
How Your Humidifier Works. . .
Model HFT2100 & HFT2700. When your home’s air is dryer than the selected
level of humidity, the humidistat activates the low-voltage solenoid in your humidi-
fier, allowing water to flow across the unit’s media. Warm, dry air is then forced
through the humidifier cabinet by the furnace blower. As the warm air evaporates
the water, the resulting moist (or humidified) air is circulated throughout your home
by the heating system.
35%
40%
25%
Checking the Humidifier for Proper Operation
To check your humidifier for proper operation after servicing or winter start-up,
follow these procedures:
Model HFT2900FP. (White-Rodgers Model HFT2900FP operates identically to
Model HFT2100 & HFT2700, except that warm air is forced through the humidifi-
er cabinet by a humidifier fan rather than by the furnace blower.)
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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3
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