Aprilaire 56 User manual

4
Humidier
OPERATING INSTRUCTIONS
Model 56
Automatic Humidier Control
INSTALLER: LEAVE THIS
OPERATION MANUAL WITH
THE HOMEOWNER
B2202674B • 10005447 • 6.22
© 2022 AprilAire | aprilaire.com | 800.334.6011
AprilAire reserves the right to change specications without notice.
TO DETERMINE THE RELATIVE HUMIDITY
(RH) IN YOUR HOME
The Humidier Control is a precision instrument that can be used
to determine the RH accurately in your home. If you would like to
determine the relative humidity in your home, follow these steps:
1. Activate the furnace blower by setting your thermostat fan
switch to the ON position, or by setting your thermostat to a
higher temperature.
2. Turn the control dial setting to the OFF position. Then, slowly
turn the dial clockwise until you hear the solenoid valve “click
on”. Next, slowly turn the dial counterclockwise until you hear
the solenoid valve “click off”. This will be very close to the
actual RH in your home.
CHECK THE HUMIDIFIER OPERATION
(BOTH AUTOMATIC AND MANUAL MODES)
Set the knob to TEST/RESET. Make sure that the water shutoff
valve is open and that there is electricity to the unit. The furnace
blower motor must be operating for the humidier to function.
After the humidier has operated for one minute and water is
entering the unit and coming out at the drain, reset the control to
it’s original setting.
CHANGE WATER PANEL LIGHT
(BOTH AUTOMATIC AND MANUAL MODES)
If the Change Water Panel
light remains lit, your
Water Panel needs to be
replaced. After changing
the humidier pad, turn the
knob to TEST/RESET until the
Change Water Panel light
starts to blink. NOTE: Control
must be powered (furnace
on) to reset the Water Panel
change indicator.
If the Change Water Panel light is blinking, your unit is in TEST
mode. Do not leave in TEST mode or humidier will not operate.
Turn the knob to it’s original setting for normal operation.
LIMITED WARRANTY
Your AprilAire® Automatic Humidier Control is expressly warranted for ve (5)
years from date of installation to be free from defects in materials or workmanship.
The exclusive obligation of AprilAire under this warranty shall be to supply, without
charge, a replacement for any control which is found to be defective within such
ve (5) year period and which is returned not later than thirty (30) days after
said ve (5) year period by you to either your original supplier or to AprilAire,
Madison, Wisconsin 53701, together with the installation date of the control.
THIS WARRANTY SHALL NOT OBLIGATE APRILAIRE FOR ANY LABOR COSTS AND SHALL
NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER
AS CONTRASTED TO DEFECTS IN THE CONTROL ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
SHALL BE LIMITED IN DURATION TO THE AFORESAID FIVE YEAR PERIOD. THE APRILAIRE
LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES
FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAID IMPLIED
WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY EXCLUDED. THIS
LIMITED WARRANTY IS VOID IF DEFECTS(S) RESULT FROM FAILURE TO HAVE THIS UNIT
INSTALLED BY A QUALIFIED HEATING AND AIR CONDITIONING CONTRACTOR. IF THE
LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR, ALL
DISCLAIMERS OF IMPLIED WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION.
Some states do not allow limitations on how long an implied warranty lasts or
the exclusion or limitation of incidental or consequential damages so the above
exclusion or limitations may not apply to you.
This warranty gives you specic legal rights and you may also have other rights
which vary from state to state.
WARRANTY REGISTRATION
Visit us online at aprilaire.com to register your AprilAire product. If you do not
have online access, please mail a postcard with your name, address, phone
number, email address, product purchased, model number, date of purchase,
and dealer name and address to: AprilAire, P.O. Box 1467, Madison, WI 53701.
Your warranty registration information will not be sold or shared outside of
this company.
YOUR HUMIDIFIER
Your Humidier Control offers two modes of operation, Automatic or
Manual. The automatic mode of operation requires the installation
of an outdoor sensor and provides the following benets:
1. You always receive the optimal amount of humidity.
Automatically adjusts your home’s relative humidity (RH)
based on the outdoor temperature.
2. Eliminates the need to manually adjust the control when
outdoor temperature changes – a common occurrence with
manual humidistats.
3. Maximizes the amount of time humidity is maintained in
the healthy range, 40-60% RH. Precisely adjusts the relative
humidity to deter the adverse effects of low humidity on your
home’s occupants, such as itchy eyes and dry skin. It also
protects your home and its furnishings from the effects of excess
condensation when outdoor conditions are the most severe.
4. Simple operation with few adjustments.
Eliminates the need to turn the dial setting
to OFF during the summer season.
WATER PANEL CHANGE INDICATOR
90-1009
Product Info &
Digital Manual

21 3
OPERATING INSTRUCTIONS
AUTOMATIC MODE (MANUAL MODE – SEE PAGE 4)
Your Humidier Control is installed in the return air duct of your air
conditioning and heating system. During the rst heating season,
your Humidier Control needs to be set initially
to match your home’s condition. Please follow
these steps when adjusting your control.
1. Turn the dial setting knob to 5, which is
within the normal range. During the next
24-48 hours, it may be necessary to
adjust the dial for more or less humidity,
depending on your personal comfort and
home’s requirements. Refer to TABLE 1.
2. During the coldest portion of the rst heating season, minor
adjustments may be necessary. This is dependent upon your
individual home construction. Refer to TABLE 1.
TABLE 1 – OPERATION GUIDE
Condition Solution
Condensation on
windows.
Reduce the setting on the control dial
by 1 increment.
Humidity too low. Increase the setting on the control dial
by 1 increment.
Humidier does not
operate. (Solenoid
does not “click” when
control is moved to
TEST/RESET position.)
Turn dial to TEST/RESET. Make certain
furnace blower is operating and
furnace is calling for heat. If unit still
doesn’t operate, consult a heating
contractor.
Humidier won’t
shut off.
Turn dial to OFF. If unit continues to
operate, consult a heating contractor.
Test mode.
System operation is checked by
setting the knob to TEST/RESET. Make
certain furnace blower is operating
and furnace is calling for heat.
Humidier will operate for one minute.
The relative humidity in your home will now be controlled to meet
your needs and should not need further adjustment during future
heating seasons. Make note of the dial setting in the event you
temporarily move the knob when performing annual maintenance
of the humidier.
ADDITIONAL INFORMATION
Your humidier is a high precision system that will accurately
maintain the relative humidity in your home. For every 1°F change
in outdoor temperature, the Automatic Humidier Control will
automatically adjust the indoor relative humidity (RH) by 1/2%. If
you would like to determine the relative humidity in your home,
follow these steps:
1. Determine the outdoor temperature.
2. Activate the furnace blower by setting your thermostat to a
higher temperature.
3. Turn the Humidier Control dial setting to the OFF position.
Then, slowly turn the dial clockwise until you hear the solenoid
valve “click on”. Next, slowly turn the dial counterclockwise until
you hear the solenoid valve “click off”. At this point, make note
of the dial setting.
4. Locate your dial setting on TABLE 2. Follow the dial setting
to the right until it intersects with the current outdoor
temperature. This is the relative humidity in your home under
existing conditions.
TABLE 2 – % RELATIVE HUMIDITY GUIDE
Outdoor Temperature (°F)
-10°F 0°F 10°F 20°F 30°F 40°F
Dial Setting
110% 10% 10% 15% 20% 25%
Relative Humidity (%)
210% 10% 15% 20% 25% 30%
310% 15% 20% 25% 30% 35%
415% 20% 25% 30% 35% 40%
520% 25% 30% 35% 40% 45%
625% 30% 35% 40% 45% 45%
730% 35% 40% 45% 45% 45%
As an example, if the outdoor temperature is 20°F and, following
step 3, the humidier turns off at 5on the dial range, then the
relative humidity in your home is 35%.
5. Return the thermostat and control to their original settings.
The healthy humidity range is 40-60%, but on cold days that can
result in condensation forming on cold surfaces which can cause
damage to your home. The Humidier Control will automatically
adjust the humidity setting lower to compensate. The Humidier
Control will accurately control the humidity in your home to a
maximum of 45% RH and a minimum of 10% RH. The values of
outdoor temperature and dial settings may fall in between or
outside of the listed values in TABLE 2. In these cases, you can only
approximate your home’s actual indoor relative humidity.
MANUAL MODE (AUTOMATIC MODE – SEE PAGE 1)
Your Humidier Control is installed in the
return air duct of your air conditioning
and heating system. When installed
in the manual mode, it is important to
anticipate a drop in outdoor temperature
and reduce the setting accordingly to
avoid excess condensation. For example,
with an outdoor temperature of 20°F,
the correct setting will be 35%. If the
temperature is expected to fall to 0°F,
reduce the setting to 25% several hours
prior to the temperature change.
See TABLE 3 for the
recommended settings.
These settings represent a
compromise between healthy
humidity levels (40-60% RH)
and protection from window
condensation. For example,
a range of 40-60% indoor
humidity in wintertime may
be ideal for comfort, but
would result in damaging
condensation. Thus, observing
recommended humidity levels
on the Humidier Control is
important. Condensation on
the inside surface of windows
in the form of fogging or
frost is indicative of over-
humidication. This same
condensation can occur in
other areas of the home,
resulting in damage.
90-1054
90-1055
TABLE 3 – OUTDOOR
TEMPERATURE / INDOOR
RELATIVE HUMIDITY
Outside
Temperature
Recommended
RH
+40°F 45%
+30°F 40%
+20°F 35%
+10°F 30%
0°F 25%
-10°F 20%
-20°F 15%