HE120A HE120B By Pass Drum Humidifier Honeywell He120 Product Data

User Manual: HE120B

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HE120A,B
By-Pass Drum Humidifier
PRODUCT DATA

FEATURES/BENEFITS
• Can be installed in a furnace room without a drain.
• Capable of humidifying a large area.
• Small footprint, light weight and reversible
components allow easy mounting on either warm air
supply or return air duct of any forced air furnace.
• Minimal amount of water and electricity needed for
operation, saving the homeowner money.
• Unique snap-lock fittings and reversible components
allow quick installation and maintenance.
• Interior components designed for easy clean up
or replacement.
• Durable thermoplastic cabinet resists rust, corrosion
and warpage.

APPLICATION
The HE120A,B By-Pass Drum Humidifier uses the warm air
furnace blower to provide humidification for the whole house.
The HE120A,B works with virtually any Honeywell humidity
control, but use the Honeywell Perfect Climate Comfort
Center™ control for optimal performance.

• Includes easy-to-use humidity control that mounts on
the wall or duct for more installation flexibility.
• Perfect Climate Comfort Center™ control can be
installed to replace both the thermostat and humidity
control for improved aesthetics and convenience.
• Optional Automatic Flushing Timer can be used to
reduce the frequency of maintenance. A drain is
required if the timer is installed.

Contents
Application ...........................................................................
Features/Benefits ................................................................
Specifications ......................................................................
Ordering Information ...........................................................
Installation ...........................................................................
Wiring ..................................................................................
Operating the Humidifier .....................................................
Operation ............................................................................
Maintenance ........................................................................
Checkout Procedure ...........................................................
Troubleshooting ...................................................................
Replacement Parts ..............................................................

® U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • All Rights Reserved

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68-0190-3

HE120A,B BY-PASS DRUM HUMIDIFIER

HE120 B Tradeline® By-Pass Drum Humidifier package
includes:
mounting template and hardware,
self-piercing saddle valve,
24 Vac transformer and wire,
by-pass tubing,
summer shut-off damper,
H1008A Automatic Humidity Control with HumidiCalc+™
Software.

SPECIFICATIONS
Capacity:
At 120°F (49°C) plenum temperature and 0.20 static pressure
drop across supply and return:
17 gallons per day (gpd) or 64 liters per day (lpd).
Humidified Area:
For precise sizing and product selection, use Honeywell’s
HumidiCalc™ humidifier sizing software. If unavailable, refer to
Table 1.

House
Description
Loose
Average
Tight

/1
-11

Sq ft

Sq m

Two

1,845

171

One

2,575

239

One-half

4,045

376

10

-7/

11

Area (up to)

Air Changes
Per Hour

7)

29

6(

Table 1. Size Of Area That Can Be Humidified.

12

-3/

8(

8(

27

6)

31

4)

10

-1
(2 5/16
78
)

Drum Motor:
24 Vac, 3W, 1 rpm, bi-directional.
Plenum Opening Dimensions (Height x Width):
6-5/8 in. x 8-1/2 in. (168 mm x 216 mm).
By-Pass Duct Opening (Diameter):
6 in. (152 mm).

M12254A

Dimensions:
Refer to Fig. 1.

Fig. 1. HE120A,B Dimensions in in. (mm).

Testing Standard:
Air Conditioning and Refrigeration Institute: Standard 610.

Accessories:
C7089H Outdoor Temperature Suensor.
H1008A Automatic Humidity Control with HumidiCalc+™
Software (software calculates dewpoint to prevent
moisture condensation).
H908A Convertible Humidity Control.
HC40 Automatic Humidifier Flushing Timer.
HumidiCalc™ Humidifier Sizing Software (software
calculates required humidifier capacity for application).
PC8900 Perfect Climate Comfort Center™ Control.

Models:
HE120A Tradeline® By-Pass Drum Humidifier package
includes:
mounting template and hardware,
self-piercing saddle valve,
24 Vac transformer and wire,
by-pass tubing,
summer shut-off damper,
H908A Convertible Humidity Control.

ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Logistics
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 (612) 951-1000
In Canada—Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, Ontario M2H 3N7.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

68-0190–3

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HE120A,B BY-PASS DRUM HUMIDIFIER

INSTALLATION

COVER

BEARING END OF
DRUM SHAFT

DRUM
ASSEMBLY

WARNING
Electrocution and Chemical Hazard.
Can cause death or blindness.
Do not cut or drill into any air conditioning line or
electrical accessory.

CAUTION
Freezing Water Hazard.
Can result in water damage to property.
Locate the humidifier where the ambient temperature is
between 32°F and 180°F (0°C and 82°C).
HUMIDIFIER HOUSING

IMPORTANT
To assure optimal product performance, be sure the
template is level before marking location.

WATER PAN

1. Determine the best location for the humidifier and draw a
level line on the duct. See Fig. 2 for humidifier
components.

WATER VALVE OPENING

Fig. 3. Humidifier components.
9. On the inside of the humidifier housing where the bypass tube connects, snap the bearing bracket into place
with the U shape of the bracket pointing up.
10. Snap the motor plate into place on the opposite side of
the humidifier housing.

L

TA

ON

M12252

RIZ

HO

NOTE:

Be sure the motor coupling is positioned toward
the top.

OY

HB

HIG

11. Place the lead wires through the hole in the bottom of the
motor cover and snap the cover in place.
12. Cut an opening for the 6 in. (152 mm) collar in the
selected by-pass location.

WN
DO O
FL

NOTE:
OY

Be sure to install a duct damper for summer
shutoff if there is air conditioning.

WB

LO

13. Install the 6 in. (152 mm) collar.
14. Use sheet metal screws to connect the by-pass tubing
from the collar to the humidifier.
15. Seal the connections with duct tape.
16. Insert the drain fitting in the bottom of the humidifier
housing.

M13170

Fig. 2. Typical humidifier installation locations.

NOTE:

2. Tape the template in position and trace around it.
3. Remove the template and carefully cut the rectangular
opening.
4. Position the humidifier housing (See Fig. 3.) over the hole
(be sure it is level) and mark the five mounting holes.
5. Set the cabinet aside and drill the five 7/64 in. (3 mm)
mounting holes.
6. Start the three 3/4 in. (19 mm) sheet metal screws in the
top holes.
7. Place the humidifier housing over the screws, level the
housing and tighten the three screws.
8. Use two 1/2 in. (13 mm) screws to secure the humidifier
housing at the bottom.

Be sure the overflow tube is positioned toward
the front and on the same side as the
by-pass tubing.

17. Place the water pan in the humidifier housing so the
overflow tube is above the previously installed
drain fitting.
NOTE:

Be sure the tubing does not touch hot surfaces
and sharp edges.

18. Attach a 3/8 in. (10 mm) ID tubing to the drain fitting and
route downward to a suitable drain or catch basin.
19. Screw the float onto the float valve assembly.

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68-0190–3

HE120A,B BY-PASS DRUM HUMIDIFIER

20. Attach the float valve to the humidifier housing on the
same side as the motor.
21. Insert the valve hole plug in the double D hole on the
opposite side of the valve.
22. Assemble the drum and humidifier pad. See Fig. 4.

WIRING

CAUTION
Electrical Shock Hazard.
Can shock or burn out equipment.
• Disconnect power supply before installing or
servicing.
• To prevent premature transformer burnout on
multispeed blower applications, do not wire the high
voltage side of the transformer to the same power
source that services the furnace blower.

SQUEEZE
SLIGHTLY
TO INSTALL

OPEN
DRUM END

All wiring must comply with applicable local codes, ordinances
and regulations.
1. Mount the transformer in a convenient location.
2. Connect the wires to the 120V side of the transformer.
3. Wire the drum motor, transformer and humidity control.

PAD
TINNERMAN
DRUM SHAFT
METAL TABS
CLOSED DRUM END

Refer to the humidity control installation instructions for
mounting and wiring information.

M12243

Fig. 4. Assembling drum and humidifier pad.

OPERATING THE
HUMIDIFIER

23. Insert the drum assembly into the motor coupling end
and snap into the bearing end.
24. Install the saddle valve (using the instructions on the
saddle valve bag) on the nearest cold water pipe.
25. Connect the copper tubing and route to the humidifier.
26. Connect the copper tubing to the humidifier valve and
finger tighten.
27. Use a wrench to turn the nut one and one-half turns
more.
28. Turn the water on at the saddle valve and adjust the
water level to 1-3/8 in. deep.
NOTE:

The HE120A humidifier is
controlled by the H908A
Humidity Control that is
installed either on an interior
wall in the living area or on the
return air duct. Choose the
M13155
H908A
setting using the combination
relative humidity/outdoor
temperature setting scale on your humidity control. Match the
dial setting to the outdoor temperature for optimizing the
humidity level while reducing the moisture condensation on
your windows. Table 2 can also be used to adjust the humidity
control to the recommended setting.

Turn the valve adjustment screw (located on the
water valve inside the humidifier) clockwise to
lower and counterclockwise to raise.

Table 2. Recommended Humidity Control Settings.
At Outside Temperature

Recommended Setting

At Outside Temperature

Recommended Setting

-20°F (-29°C)

15

+10°F (-12°C)

30

-10°F (-23°C)

20

+20°F (-7°C)

35

0°F (-18°C)

25

Above 20°F (-7°C)

40

NOTE:

As the outside temperature drops, the recommended setting is lowered to accommodate the effects of dewpoint. These
settings should reduce the accumulation of moisture and ice on the windows and in other areas of the house.

Some indoor activities such as cooking, showering and clothes
drying can cause excessive levels of humidity and start the
accumulation of moisture on the windows.
NOTE:

Your Honeywell HE120B
Humidifier is controlled by the
Honeywell H1008 Automatic
Humidity Control with
HumidiCalc+ Software. The
automatic humidity control is
mounted in the return air duct
where it can be exposed to the air
stream of the return air. The
HumidiCalc+ Software inside
your automatic humidity control is
designed to automatically adjust

If this condition persists for more than a few hours, set
the humidity control to the lowest setting to turn off the
humidifier. If the condition does not improve, ventilate
your home to remove the moisture.

68-0190–3

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H1008A

M12817

HE120A,B BY-PASS DRUM HUMIDIFIER
the humidity level based on indoor temperature and humidity,
inferred or measured outdoor temperature, and the setting of
the frost factor dial. The frost factor allows for variations in
furnace size, window insulation and average daily climate
temperature.

Every 1 to 3 Months
(Depending on Water Quality)

CAUTION

The Automatic Humidity Control with HumidiCalc+ Software
requires an initial adjustment period. Set the frost factor dial on
5 and use Table 3 to adjust the frost factor—only one setting at
a time—increasing the dial setting if you feel you need more
humidity, or reducing the setting if you see moisture on the
inside of your windows. For more precise humidity adjustment,
set the frost factor between dial settings. Allow two days for the
humidity level to subside before making further adjustments.
Once you have tuned in the proper setting, you should never
have to adjust it again. HumidiCalc+ Software takes over and
makes any future adjustments caused by varying outdoor
temperatures, thus reducing moisture build-up on windows
while maintaining the optimal humidity level.

Voltage Hazard.
Can cause electrical shock and equipment damage.
Disconnect power supply before installing or servicing.

IMPORTANT
Never oil any part of the humidifier.
Use the following procedure to clean the humidifier:
1. Disconnect the power and turn off the humidifier water
supply.
2. Remove the humidifier cover by lifting up the bottom of
the cover. See Fig. 5.
BEARING END OF
DRUM SHAFT

COVER

Table 3. Recommended Frost Factor Settings.

Humidity Level

DRUM
ASSEMBLY

Recommended Adjustment

Insufficient humidity

Increase the frost factor dial by one
setting

Condensation on
windows

Decrease the frost factor dial by one
setting

OPERATION
The HE120A,B humidifier uses the principle that vapor
(evaporated water) is created when warm air blows over a
water soaked area. As the vapor circulates, the relative humidity
rises.

HUMIDIFIER HOUSING

WATER PAN

The humidity control monitors the relative humidity and
activates the humidifier accordingly. The humidifier has a water
supply that disburses water over a humidifier pad. The warm
dry air from the furnace passes over the humidifier pad and
picks up the moist air to circulate it through the house.

WATER VALVE OPENING

M12252

Fig. 5. Location of humidifier parts.

Humidified air feels warmer and more comfortable so the
homeowner may be able to lower the thermostat heating
setpoint and save money on heating fuel bills. The end result is
that the humidifier gives the homeowner a comfortable
environment that is also energy efficient.

3. Lift up the drum shaft from the bearing end and slide it
out of the motor coupling to remove the drum assembly.
NOTE:

You will encounter some resistance and hear an
audible click when removing the drum shaft.

4. Remove the drum from the assembly.
5. Grasp the rubber valve seat between thumb and
forefinger and lift it upward to remove the valve seat from
the valve. (The seat is located inside the humidifier
housing at the water valve opening.)
6. Raise up the float and remove the water pan.
7. Refer to Fig. 6 to disassemble the drum.
8. Clean all humidifier parts in a 50 percent solution of
vinegar (or a humidifier cleaner) and water. Soak
overnight to remove stubborn deposits.

MAINTENANCE
A regular maintenance program prolongs the life of the
humidifier and provides a more comfortable environment.
Frequency of cleaning depends on the condition of the water.
You can use either hard or soft water in the humidifier, but
hard water mineral deposits are more difficult to clean than
soft water deposits.

NOTE:

5

Replace humidifier pad yearly. The actual
frequency depends on the quality of the water
used.

68-0190–3

HE120A,B BY-PASS DRUM HUMIDIFIER

9. After the humidifier components are clean, reassemble
the humidifier by reversing the order of steps 1 through 7.
NOTE:

CHECKOUT PROCEDURE
After winter startup or maintenance, use the following
procedure to check the humidifier operation:

To be sure that the drum shaft is completely
seated, listen for the click.

1. Turn on the humidifier power and water supply.

10. Verify the humidifier operation by following the steps in
the Checkout Procedure section.

2. Check the water level in the humidifier water pan; water
level setting should be 1-3/8 in. deep. Turn the valve
adjustment screw (located on the water valve inside the
humidifier) clockwise to lower the water level and
counterclockwise to raise it.

End of Humidification Season
The humidifier should be cleaned and shut off at the end of the
heating season. Use the Every 1 to 3 Months section, steps 1
through 9, to shut down for the season.

3. Turn the H908A Convertible Humidity Control to the
highest setting or the H1008A Automatic Humidity
Control to the Test position, and set the thermostat to
10°F (6°C) above the room temperature.

IMPORTANT
Be sure the humidifier power is off and the humidifier
is empty.

Vacation

NOTE:

When you leave on vacation, turn off the humidifier water
supply and your humidity control. When you return, turn on the
humidifier water supply and reset your humidity control.

The H1008A Automatic Humidity Control stays
in the test mode for thirty minutes. After thirty
minutes, the control automatically resets to the
maximum frost factor setting. If system
checkout has not been completed in thirty
minutes, the test mode can be extended by
turning the dial back to one of the dial settings
and then returning it to the test mode.

4. Check that the humidifier pad is rotating.
5. Reset the thermostat and the Convertible Humidity
Control to a comfortable setting, or the Automatic
Humidity Control to the desired frost factor setting, for
automatic operation.

SQUEEZE
SLIGHTLY
TO INSTALL

OPEN
DRUM END
PAD
TINNERMAN
DRUM SHAFT
METAL TABS

CLOSED DRUM END

M12243

Fig. 6. Drum assembly parts.

TROUBLESHOOTING
Refer to Table 4 for troubleshooting procedures.
Table 4. Troubleshooting Procedures.
Problem
Low humidity

High humidity

68-0190–3

What To Look For

What To Do

Furnace blower not
operating.

•
•
•
•
•

Reset circuit breaker or check for blown fuse.
Check that the furnace power is on.
Check all external wiring connections.
Check the humidity control setting.
Call a professional heating contractor.

Rapid air changes.
Drafts (cold air is dry and
is an added load to the
humidifier).

•
•
•
•

Keep doors and windows closed.
Close fireplace damper when not in use.
Keep exhaust fan running time to a minimum.
Seal around doors and windows.

Condensation on walls.

• Turn off humidity control and water until condensation is completely
evaporated.

Heavy condensation on
windows.

• Turn humidity control down low enough to eliminate condensation caused by
moisture from bathing, mopping, cooking, etc. If moisture persists, more
ventilation is needed.

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HE120A,B BY-PASS DRUM HUMIDIFIER

REPLACEMENT PARTS
Refer to Fig. 7 and Table 5 when ordering replacement parts.

8
10
9
9

9

9

13

12
14
11

3

1

4
5
7
6
2

M12239A

Fig. 7. Exploded view of humidifier parts.

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68-0190–3

HE120A,B BY-PASS DRUM HUMIDIFIER

Table 5. List Of Replacement Parts For HE120 Humidifier.
Exploded View Number
1

Description
Cover Assembly

HE120 Part Number
32000131-001

2

24 Vac motor

32000132-001

3

Humidifier housing

32000133-001

4

Water pan

32000134-001

5

Float for valve

32000135-001

6

Float valve

32000136-001

7

Valve seat

32000137-001

8

Saddle valve assembly

32001616-001

9

Drum assembly

32000141-001

10

Humidifier pad (includes clips)

32000146-001

11

Transformer (10 VA)

32001652-001

12

Bearing bracket

32000147-001

13

Convertible Humidity Control

H908A1003

14

Automatic Humidity Control

H1008A1008

—

Current Sensing Relay

32001754-001

Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524

Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7

Honeywell Latin American Region
480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325

Honeywell Europe S.A.
3 Avenue du Bourget
1140 Brussels
Belgium

68-0190—3 J.S. Rev. 6-98
68-0190–3

Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer
8 paper fibers.

Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong

www.honeywell.com



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Description                     : ByPass Drum Humidifier
Creator                         : Honeywell - Bel-Aire ElectronicAirCleaners.com
Title                           : HE120A HE120B By-Pass Drum Humidifier
Subject                         : White-Rodgers Whole House Humidifier HDT2600 Series, Skuttle Model 190
Keywords                        : White-Rodgers Whole House Humidifier HDT2600 Series..Skuttle Model 190
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