MODEL HUM HUMIDIFIERS
HOMEOWNER’S MANUAL
MODEL HUM
HUMIDIFIERS
Model HUMBBLFP1025-A-Fan-Powered Humidifier
Model HUMBBLBP2018-A-Bypass Humidifier
Model HUMBBWTR2019-A-Water-Saver Bypass Humidifier
Model HUMBBSFP1016-A-Fan-Powered Humidifier
Model HUMBBSBP2017-A-Bypass Humidifier
NOTE TO
INSTALLER:
This manual
must be
left with the
equipment user.
REFRESHING MOISTURE
. . . AS NATURE INTENDED
Congratulations on your excellent choice
and sound investment in this addition to
your home comfort system.
Your humidifier represents both the latest
in engineering development and the culmination of many years of experience
from one of the most reputable manufacturers of comfort systems.
Your new unit is among the most energyefficient and reliable home humidifiers
available today. To assure its dependability, spend a few minutes now with this
booklet. Learn about the operation of
your humidifier and the small amount of
maintenance it takes to keep it operating
at peak efficiency.
With minimal care, your humidifier will
provide you and your family with moist,
spring-fresh air—from season to season
and year to year.
YOUR HOME HUMIDIFIER
lustrous appearance. Houseplants thrive.
Static electricity is significantly reduced
in a properly humidified home. Your family will breathe more easily and find relief
from the cool, drafty feeling commonly
experienced in overly dry homes. The additional moisture supplied by your humidifier may enable you to reduce the
temperature setting on your thermostat—
without any loss of indoor comfort.
HOW YOUR HUMIDIFIER
WORKS
Your humidifier adds water molecules to
the air inside your home. Although the
rate of humidification is variable, it may
exceed one-half gallon of water per hour.
That’s a healthy drink for a dry household. The typical process of humidification begins when water flows through the
humidifier valve and soaks the large
evaporator pad. Hot, dry air from the furnace passes through the pad and absorbs
the water. Then, this moisture-laden air is
distributed throughout the house via the
ductwork. See Fig. 1, 2, and 3.
YOUR HOME CAN BE DRIER
THAN DEATH VALLEY
During the heating season, your home
can become uncomfortably dry. This is
because cold winter air holds very little
moisture. When outdoor air is warmed to
average room temperature, its relative
humidity falls to even lower levels. Refer
to Table 1 for a comparison of the levels
of relative humidity for a few sample
environments.
EVAPORATOR
PAD
DRY
AIR
HUMIDIFIED
AIR
DRAIN
Fig. 1
Table 1—Relative Humidity
Comparison
DRY
AIR
HEATED HOME
RECOMMENDED
RELATIVE
HUMIDITY
35%
SAHARA
DESERT
DEATH
VALLEY
25%
23%
HEATED HOME
AVERAGE
HUMIDIFIED
AIR
5-15%
Parched air can cause the wood used in
the construction of your house and furnishings to dry, crack, and split. Draperies and upholstery may age prematurely.
Annoying static electric shock and cling
are more prevalent. Your throat, nasal
passages, sinuses, and skin are more
susceptible to irritating dryness. You may
even have to set the thermostat higher
than otherwise necessary—just to feel
warm.
Fig. 2
Your new humidifier is designed to operate as part of your home heating system.
It will perform at maximum efficiency
if these recommendations are
followed:
• The humidifier is controlled by a humidistat. Adjust the humidistat setting
according to the outside temperature.
Refer to Table 2 as a general guide. If after
several days, the air in your home seems
too moist, lower the humidistat setting.
Condensation on single-pane windows
indicates excessive moisture. If the air is
too dry, increase the setting. Dry throat
and nasal passages indicate dry air.
• All models come with a humidistat.
Continuous blower operation provides for
constant humidification. It may also contribute to greater personal comfort
because continuous blower operation
minimizes temperature differences
throughout the home. Furthermore, a
system equipped with an electronic air
cleaner offers the added benefit of fulltime air filtration.
• Supply- and return-air grilles should
not be blocked by items such as drapes,
furniture, and toys. Restricted airflow
reduces the efficiency of the humidifier,
as well as that of the whole comfort
system.
• The humidifier unit must be properly
maintained on a regular basis.
STARTUP PROCEDURES
1. Open the saddle valve on the
water supply line. (See Fig. 4.) Set
humidistat to the desired relative
humidity. (See Fig. 5 and Table 2.)
2. Turn the furnace on and adjust the
thermostat to a high temperature
setting. Be sure that the furnace
blower is operating.
3. Check to see if water is flowing into
the humidifier.
Table 2—
Humidistat Settings
TYPICAL
INSTALLATIONS
MOISTURE MAKES A
REFRESHING DIFFERENCE
Proper humidity control can alleviate
problems caused by excessive dryness.
Furnishings and fabrics take on a more
OPERATING YOUR
HUMIDIFIER
Fig. 3
—2—
OUTSIDE
TEMPERATURE
(°F)
–20
–10
–0
10
20
30
RECOMMENDED
HUMIDISTAT
SETTING
(% RELATIVE
HUMIDITY)
15
20 (LOW)
25
30
35
40 (MED)
Fig. 4—Saddle Valve
bly in place. Check to see if water is flowing from the solenoid valve into the
distributor pan. (See Fig. 9.)
• On a Model HUMBBWTR unit, look
through the window on front of the unit to
see that the evaporator pad is rotating and
water is flowing. (See Fig. 10.)
The Model HUMBBWTR is controlled
by a float valve. Turning off the furnace
will not affect the water flow until float
level is achieved. (See Fig. 11.)
SOLENOID VALVE
DISTRIBUTOR COVER
SHUTDOWN PROCEDURES
To shut down your humidifier, close the
saddle valve on the water line. Then turn
off the humidistat. When set to the OFF
position, the humidistat shuts off the
electrical power to the solenoid valve on
the humidifier.
NOTE: If your home comfort system includes cooling, be sure the water supply
to your humidifier is turned off during
the cooling season. Close the damper
located in the bypass duct if one is
installed. If your humidifier is a Model
HUMBBWTR, drain and clean the water
pan as described in cleaning procedures.
DISTRIBUTOR PAN
PERFORMING ROUTINE
MAINTENANCE
EVAPORATOR PAD
AT
CABINET
ST
IDI
M
HU
Fig. 5
• On a Model HUMBBLBP or Model
HUMBBLFP humidifier, loosen the
thumbscrew that holds the distributor
cover to the top of the cabinet. Lift up the
distributor cover slightly to make certain
that water is flowing from the solenoid
valve into the distributor pan. Do not lift
the cover off the cabinet more than 1 in.
when water is flowing. (See Fig. 6 or 7
according to the model you own.)
SOLENOID VALVE
BOTTOM ACCESS PANEL
Fig. 7—
Model HUMBBLFP1025-A-INLET
SOLENOID VALVE
CABINET
DISTRIBUTOR PAN
EVAPORATOR PAD
With the proper maintenance and care,
your humidifier will operate economically and dependably. Maintenance can
be accomplished easily by referring to
the following directions. However,
before performing any maintenance,
consider these important safety
precautions:
• DISCONNECT ALL ELECTRICAL POWER TO THE HUMIDIFIER
AND FURNACE BEFORE PERFORMING ANY SERVICE OR
MAINTENANCE TO AVOID PERSONAL INJURY.
DUCT HOUSING
BEARING RETAINER
SIDE ACCESS DOOR
RECTIFIER
DRAIN
Fig. 8—
Model HUMBBSBP2017-A--
DISTRIBUTOR COVER
DISTRIBUTOR PAN
CABINET
CABINET
FRONT COVER
EVAPORATOR PAD
PAD
SCREWS (4)
PAD ASSEMBLY
PAN
Fig. 10—
Model HUMBBWTR2019-A--
CABINET
BOTTOM ACCESS
PANEL
Fig. 6—
Model HUMBBLBP2018-A--
• On a Model HUMBBSBP humidifier,
gently pull the latch that secures the
access door. Remove the door. Check to
see if water is flowing from the solenoid
valve into the evaporator pad. (See Fig. 8.)
• On a Model HUMBBSFP humidifier,
open the side door or the front cover. If the
front cover is opened, hold the pad assem-
SIDE ACCESS DOOR
Fig. 9—
Model HUMBBSFP1016-A-4. Turn off the furnace. When the
blower stops, look into the humidifier to make sure the water is not
flowing into the unit.
5. Replace the cover assembly and
fasten securely.
6. Now, turn the furnace on and set
the thermostat for desired room
temperature.
—3—
NOTE: THERE MAY BE MORE
THAN 1 ELECTRICAL DISCONNECT SWITCH.
• ALTHOUGH SPECIAL CARE HAS
BEEN TAKEN TO MINIMIZE SHARP
EDGES IN THE CONSTRUCTION OF
YOUR HUMIDIFIER, BE EXTREMELY CAREFUL WHEN HANDLING
PARTS OR REACHING INTO THE
UNIT TO AVOID PERSONAL INJURY.
Your humidifier has been designed for
easy disassembly to simplify cleaning
and servicing. Your unit must be kept
clean to maintain its efficiency.
Regular inspection allows you to determine the cleaning schedule best suited to
your humidifier’s operating conditions.
The frequency for required maintenance
will depend most upon the available
water supply. In areas where hard water
and high mineral content are prevalent,
more frequent cleaning and servicing
may be required.
At minimum, the humidifier will need to
be cleaned at the beginning of every heating season.
CLEANING PROCEDURES
Models HUMBBLBP,
HUMBBSBP, HUMBBLFP, and
HUMBBSFP
1. Turn off all electrical power to the
humidifier and furnace or fan coil.
2. Turn off the humidifier’s water
supply. (See Fig. 4.)
3. Disassemble the humidifier.
• To disassemble a Model HUMBBSBP
humidifier, gently pull the latch that
secures the access panel. Remove the door
and slide the evaporator pad assembly out
of the unit. (See Fig. 8.)
• To disassemble either a Model
HUMBBLBP or Model HUMBBLFP
humidifier, first remove the water supply
connection to the solenoid valve. Next,
remove the screw that holds the distributor cover to the cabinet, and lift off the
cover. Disconnect the drain line from the
sump and loosen the thumbscrew(s)
holding the sump to the cabinet. Remove
the sump. Remove evaporator pad
assembly. (See Fig. 6 or 7, according to
the model you own.)
• To disassemble a Model HUMBBSFP,
the pad assembly can be removed from the
side access door or the front cover. When
removing the side door, lift the pad assembly up by holding the tabs and slide the
assembly out. When removing the front
cover on Model HUMBBSFP, disconnect
the quick connects to the solenoid valve,
unscrew the 4 screws to the front cover,
snap loose the top and bottom catches, and
lay the front cover aside. Once the front
cover is off, lift the pad assembly up and
twist it out. The pad assembly consists of 4
parts; the distributor pan, frame, sump, and
the evaporator pad. Pull the distributor pan
apart from the frame and the evaporator
pad can be removed. Do not force the evaporator pad in or out without removing the
distributor pan, as this will distort the pad.
4. Clean the humidifier’s external
components.
• If your humidifier is a Model
HUMBBSBP humidifier, wash the access
door and outlet drain portion of the cabinet. Make sure the drain is open.
• If your humidifier is a Model
HUMBBLBP or HUMBBLFP, wash the
distributor cover, sump cover, and cabinet.
Be sure the inlet ports are open and clean.
Then, clean the sump with a solution of
detergent and water.
5. Clean the internal components of
your humidifier. Wash the distributor pan with a mild detergent and
warm water. Be sure holes and slots
in the pan are clean and unobstructed. Wash the evaporator pad
assembly in a detergent solution. If
there are scale deposits on the pad,
soak it in ordinary household vinegar. If the pad is covered by a heavy
deposit of scale, or if the local water
supply has high sulfate or calcium
content, replace the pad with a new
one. Contact your dealer for replacement part.
6. Reassemble your humidifier.
7. Turn on the electrical power and
water supplies. Refer to the startup
procedures.
Model HUMBBWTR
1. Turn off all electrical power to the
humidifier and furnace or fan coil.
2. Turn off the humidifier’s water
supply. (See Fig. 4.)
3. Drain water from the unit. Place a
pail underneath the drain plug
located on the bottom of the humidifier cabinet. Lift the tab on the drain
plug and remove the plug. Allow
all water to drain from the unit.
(See Fig. 12.)
4. Remove the front door from the
humidifier. Rotate the latches onehalf turn, then pull the door forward.
5. Remove and inspect the evaporator
pad assembly. Lift the bearing from
its retainer. (See Fig. 10.) Pull the
assembly away from the motor to
disengage the assembly shaft from
the motor coupling. Remove assembly through the access opening.
Inspect the evaporator pad. If the pad is
heavily loaded with scale, or if the local
water has a high sulfate content, replace
the pad. Contact your dealer for replacement part.
NOTE: For best performance, the evaporator pad should be replaced before each
heating season.
6. Inspect the float assembly. Remove
the float arm from the valve body by
sliding out the pin and lifting off the
float arm. (See Fig. 11.) Inspect the
rubber valve seat located inside the
float arm. If the seat appears to be
nicked or worn, invert the seat or replace it with the spare valve seat
—4—
located on the float arm. Inspect the
water opening in the valve body. If
the opening is clogged, use a pin to
remove the obstruction. Remove
any accumulated deposits from the
valve body and float arm.
7. Clean the water pan and unit cabinet. Tilt the water pan and lift it from
the unit. Wash the pan with warm,
soapy water. Flex the pan to loosen
accumulated scale. Wash the unit
interior, removing any accumulated
deposits. Inspect the drain line to insure that no blockage has occurred.
Clean as required. (See Fig. 12.)
8. Reassemble your Model
HUMBBWTR humidifier. Reinsert
the water pan and drain plug. Ensure
that the overflow tube is inserted
into the hole at the bottom of the
cabinet. Attach the float arm to the
valve body by aligning the holes on
both parts and reinserting the pin.
Do not force or bend the pin. The
float arm should have free up-anddown movement. Install the evaporator pad assembly. Ensure that the
square shaft engages the motor coupling and that the bearing washer is
located inside the bearing retainer.
Turn the water on. Adjust float by
rotating until water covers inside of
foam drum. Attach the access door
and turn the latches.
PIN
FLOAT ARM
VALVE
BODY
HIGHER
LOWER
VALVE SEAT
Fig. 11—Float Arm Removal
HUMIDIFIER HOUSING
WATER PAN
OVERFLOW TUBE
DRAIN PLUG
Fig. 12—Cleaning Water Pan
and Unit Cabinet
9. Turn on electrical power supplies.
Refer to startup procedures listed on
page 2.
BEFORE YOU REQUEST
A “SERVICE CALL’’
BEFORE YOU CALL FOR
SERVICE, CHECK FOR THESE
EASILY SOLVED PROBLEMS:
• Check the main power disconnect
switch. Verify that the circuit breakers
are on and that fuses have not blown.
If you must reset breakers or replace
fuses, do so only once. Contact your
servicing dealer for assistance if the
breakers trip or the fuses blow a
second time.
• Check for sufficient airflow. Check the
furnace filter or electronic air cleaner for
excessive accumulations of dirt. Check
for blocked return- or supply-air grilles.
Be sure grilles are open and unobstructed.
• If water drips from the humidifier,
check the drain hose for kinks or obstructions. If your unit is a Model
HUMBBWTR, dripping may indicate
that the float valve requires adjustment.
If your comfort system still fails to operate
properly, contact your servicing dealer for
troubleshooting and repairs. Specify your
apparent problem, and state the model and
serial numbers of your equipment. (You
should have them recorded where noted in
this booklet.) With this information, your
dealer may be able to offer helpful suggestions over the phone, or save valuable time
through knowledgeable preparation for
the service call.
• If the humidity level is too low, check
the humidistat setting. Confirm that the
saddle valve is turned on. Check the evaporator pad, and clean or replace the pad as
necessary. Check water level in Model
HUMBBWTR.
—5—
REGULAR DEALER
MAINTENANCE
In addition to the routine maintenance
that you perform, your humidifier should
be inspected regularly by a properly
trained service technician. The inspection (preferably each year, but at least
every other year) should include the following:
• Routine inspection of the humidifier.
Cleaning, if necessary. Cleaning or
replacement of the evaporator pad as
required.
• A check of all electrical wiring and
connections.
• A check of water connections to the
unit.
• Operational check of the complete
comfort system to determine actual
working condition. Necessary repair
and/or adjustment should be performed at
this time.
Your servicing dealer may offer an
economical service contract that covers
seasonal inspections. Ask for further
details.
—6—
—7—
Record the model and serial numbers of your new humidifier in
the following spaces. This information, along with the other
ready-reference facts requested below, may be required if you
should ever need information or service.
Model No._________________________________________
Serial No. _________________________________________
Date Installed ______________________________________
Dealer Name_______________________________________
Address ___________________________________________
City ______________________________________________
State ____________________ Zip_____________________
Telephone _________________________________________
Cancels: OM08-5
© 1998 Bryant Heating & Cooling Systems, 7310 W. Morris St.
Indpls, IN 46231
—8—
Printed in U.S.A.
Catalog No. 13HU-MB0
OM08-6
7-98
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