Aprilaire 1852 User Manual
Model 1830, 1850 & 1850W Dehumidifier
Owner’s Manual
PLEASE LEAVE THIS MANUAL WITH THE HOMEOWNER
Installed by: _________________________________ Installer Phone: _______________________ Date Installed: _______________
ON/OFF button
used to turn
dehumidifier on
and off
MODE button
used for optional
ventilation feature
Up/ Down
buttons used to
change humidity
setting
Dehumidifer Control
Inlet Filter Access
Door
Outlet
Drain Power
Switch
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WHOLE HOME DEHUMIDIFICATION
The Aprilaire® Dehumidifier controls the humidity level in your entire home. A powerful blower inside the dehumidifier draws air into the cabinet,
filters the air and removes moisture, then discharges the dry air into the HVAC system or dedicated area of the home. Inside the cabinet, a
sealed refrigeration system removes moisture by moving the air through a series of tubes and fins that are kept colder than the dew point of
the incoming air. The dew point is the temperature at which moisture in the air will condense, much like what occurs on the outside of a cold
glass on a hot summer day. The condensed moisture drips into the dehumidifier drain pan to a drain tube routed to the nearest floor drain or
condensate pump. After the moisture is removed, the air moves through a second coil where it is reheated before being sent back into the home.
The air leaving the dehumidifier will be warmer and drier than the air entering the dehumidifier.
You can reduce the amount of humidity that enters the home by closing windows, doors, and fireplace flues when outdoor humidity is high,
and by drying clothes outside. Direct exhaust from kitchen vents and bath fans is the best means of controlling humidity due to cooking and
showers/baths. The dehumidifier is not designed to prevent window condensation in winter. Use ventilation to lower indoor humidity levels
in the winter.
SETTING THE DESIRED HUMIDITY LEVEL
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The dehumidifier on-board control will display the humidity setting when not running,
and displays the measured humidity when running.
The UP and DOWN arrow buttons allow the humidity level to be set from 40% to 80%
relative humidity. Use the ON/OFF button to turn the dehumidifier ON or OFF.
Set the control at 55%RH when first
installed. Allow the dehumidifier to run
until it reaches the setting before deciding
if you want to change the setting.
• Ifyouprefertheairtobemoredry,
decrease the humidity setting.
• Ifyouprefertheairtobelessdry,
increase the humidity setting.
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Your comfort is the best measure of how to adjust your setting. When first installed,
your dehumidifier has to remove all the moisture that is initially in your home. The home
acts like a sponge so the moisture in the materials of your home is at the same level as
the air. After drying the air, the materials of the home will release moisture back into
the air until they are again at the same level. As a result, it is not uncommon for the
dehumidifier to operate for an extended period when first installed.
HOW DOES THE DEHUMIDIFIER WORK?
ENERGY SAVINGS TIPS
EnergySavingsTip#1: Adjust the humidity
setting to be as high as is comfortable to
reduce dehumidifier run time. If it feels
clammy or “smells musty”, lower the humidity
setting. To save energy, turn the dehumidifier
to OFF when you open your windows, just as
you would with air conditioning.
EnergySavingsTip#2: If vacating your home
for an extended period in the summer, set the
RH at 55% and set your thermostat as high as
you are comfortable setting it to in the cooling
mode. Consult with appropriate professionals
regarding the highest temperature that is safe
for your pets or possessions. This will keep the
humidity at a controlled level while minimizing
the amount of cooling energy used.
Once per hour the dehumidifier will measure the humidity level of the air and compare it to the humidity setting. If the humidity in your home is
higher than the setting, the dehumidifier will dehumidify the air until the humidity level drops below the setting. NOTE: The dehumidifier will
continue to dehumidify until the humidity level is 3%RH below the setting.
When the dehumidifier turns on, the blower circulates the air for 3 minutes before measuring the
humidity level of the air. The on-board control will display AIR SAMPLING, along with the measured
humidity on the control screen.
If the humidity of the air is higher than the setting, the compressor turns on and the control will display
DEHUMIDIFYING, along with the measured humidity on the control screen.
Your dehumidifier is equipped with two features that protect against unwanted energy consumption. Defrost is a normal operating mode that
helps to prevent significant ice formation on the refrigeration system coil. The dehumidifier display will show “DEFROSTING” when operating
in this mode. This mode can occur when there is not enough air moving through the dehumidifier or if the temperature and/or humidity of
the incoming air is too low. The second protection feature is the E8 code. E8 on the dehumidifier display indicates that the air entering the
dehumidifier is below 50°F or above 104°F, or the dew point of the incoming air is below 40°F. There would be a significant reduction in
dehumidifier efficiency if the dehumidifier operated outside of these conditions. Low dew point conditions can be seen in some basements
or crawl spaces and usually occur in the Winter and Spring months. The dehumidifier continues to monitor the incoming air and when the
conditions are within the operating range, E8 will be removed from the display and dehumidification will begin as needed.
OPTIONAL – HEATING AND COOLING SYSTEM BLOWER OPERATION
Your installing contractor may have configured the dehumidifier to turn on the heating and cooling system blower when the dehumidifier turns on
to allow for improved circulation of the dry air.
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EXTERNAL CONTROL OPTIONS
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Your Aprilaire dehumidifier can be controlled with an optional external control that is conveniently located in the living space. The Aprilaire
Model 76, 8620, and 8910 are recommended controls. The Model 76 is a dedicated dehumidifier control and the 8620 and 8910 integrate
dehumidification control as part of the thermostat minimizing the number of controls on the wall.
The Model 76 can also act as a remote control if the dehumidifier is located in a crawl space. Install the Model 76 in your living space and make
changes to the dehumidifier setting or find out what the humidity level is in the crawl space from the comfort and convenience of the living space.
If one of these controls or any other external control is installed, please refer to their owner’s manuals for operating instructions. Aprilaire owner’s
manuals are available at www.aprilaire.com.
If you are interested in having an external control installed, please consult your installing contractor.
Model 76 Control Model8620ThermostatorModel8910*HomeComfortControl
™
8620MainDisplayScreen 8620HumidityControlScreen
* Model 8910 consists of a thermostat and equipment control module to accommodate the installation
of various IAQ accessories.
HOW DOES THE OPTIONAL VENTILATION WORK?
If you had your contractor install the optional ventilation feature, they calculated how much fresh air was needed based on various factors
(i.e. home size, number of occupants, local building codes, etc.). Knowing how much is needed and the rate at which fresh air will be brought
into your home, the contractor set up the dehumidifier control to operate ventilation a certain amount of time per hour to provide the needed
fresh air. When ventilation operates, a damper in a duct that brings air in from the outside opens, and
your heating and cooling system blower will run to distribute the fresh air.
If you need to change the amount of time to operate ventilation, press the MODE button twice to
display the ventilation time setting. Use the UP or DOWN button to adjust the number of minutes
per hour (0–60, set to zero to turn it off) that ventilation is to run. The control will return to the
dehumidifier setting display automatically.
For additional information, go to www.aprilaire.com to find out more about the benefits of home ventilation.
MAINTENANCE
CLEAN OR REPLACE THE AIR FILTER
After initial installation the air filter should be checked and
cleaned every 6 months. The CLEAN FILTER service reminder
will display on the on-board control screen every 6 months.
To clear the service message, press the UP and DOWN
arrows simultaneously for 3 seconds.
Filter Cleaning Procedure
1. Turn the ON/OFF switch OFF.
2. Remove the filter access door from either side of the dehumidifier.
3. Slide the filter out of the dehumidifier.
4. Flush the filter with warm water and a mild detergent solution.
5. Shake off the excess water from the filter.
6. Replace the filter, making sure the filter is secured in both the top and
bottom filter rails.
7. Replace the filter access door.
8. Turn the ON/OFF switch ON.
9. Press the UP and DOWN buttons simultaneously for 3 seconds to clear
the service message.
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MAINTENANCE (CONTINUED)
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CHECK THE DRAIN
The drain should be checked annually to ensure there are no blockages or air lock in the drain system. If the unit is not draining properly, have it
checked by a qualified service professional.
CAUTION
Do not use spray solvents or cleaners on or near the inlet side of the dehumidifier.
If desired, apply cleaner to a cloth and use to clean the cabinet.
TROUBLESHOOTING
DIAGNOSTIC CODES
The on-board control will display a diagnostic code if an error should occur and service is required.
Contact your installing contractor if E1– E7 or E9 is displayed on the on-board control screen. E8 will be
displayed if the incoming air temperature is below 50°F, above 104°F, or when the dew point is below
40°F. When the incoming air is within the acceptable range, the dehumidifier will resume operation.
If the error persists, contact your installing contractor.
LIMITED WARRANTY
Your Research Products Corporation Aprilaire® Dehumidifier is expressly warranted for five (5) years from date of installation to be free from defects in materials or workmanship.
Research Products Corporation’s exclusive obligation under this warranty shall be to supply, without charge, a replacement for any component which is found to be defective within such
five (5) year period and which is returned not later than thirty (30) days after said five (5) year period by you to either your original supplier or to Research Products Corporation, Madison,
Wisconsin 53701, together with the model number and installation date of the dehumidifier.
THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS
FURNISHED BY YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE DEHUMIDIFIER ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID FIVE YEAR PERIOD. RESEARCH
PRODUCTS CORPORATION’S 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 DEFECT(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 specific legal rights and you may also have other rights which vary from state to state.
WARRANTY REGISTRATION
Visit us on-line at www.aprilaire.com to register your Aprilaire product. If you do not have on-line 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:
Research Products Corporation, P.O. Box 1467, Madison, WI 53701
YourWarrantyRegistrationinformationwillnotbesoldorsharedoutsideofthiscompany.
10010758 5.15
B2206315C
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P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 • www.aprilaire.com
Printed in U.S.A.
© 2015 Aprilaire – A division of Research Products Corporation
Model 1830, 1850 & 1850W Dehumidifier
Installation Instructions
SAFETY INSTRUCTIONS
WARNING
1. 120 Volts may cause serious injury from electric shock. Disconnect electrical power before starting installation or servicing.
Leave power disconnected until installation/service is completed.
2. Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling duct work.
3. Dropping may cause personal injury or equipment damage. Handle with care and follow installation instructions.
CAUTION
1. Read all instructions before beginning installation.
2. Improper installation may cause property damage or injury. Installation, service, and maintenance must be performed by a
qualified service technician.
3. Do not use in pool applications. Pool chemicals can damage the dehumidifier.
4. Do not use solvents or cleaners on or near the circuit board. Chemicals can damage circuit board components.
5. Wait 24 hours before running the unit if it was not shipped or stored in the upright position
6. Do not use dehumidification to prevent window condensation in the winter. To address window condensation, use ventilation
to lower indoor humidity in the winter.
READ AND SAVE THESE INSTRUCTIONS
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TABLE OF CONTENTS
Safety Instructions......................................................................................................1
Specifications..........................................................................................................3
Set Up Dehumidifier for Installation ......................................................................................3
Duct Collars ...........................................................................................................4
Control Location........................................................................................................5
Hard Wiring............................................................................................................6
Electrical Specifications for Hard Wiring ....................................................................................6
Wiring Instructions .....................................................................................................7
Location Considerations.................................................................................................8
Drain Installation .......................................................................................................9
Leveling ..............................................................................................................9
Condensate Pan, Condensate Pump and Float Switch .........................................................................9
Ducting to HVAC System – Basement and Attic Installations ...............................................................10
Ducting to HVAC System – Closet Installations ...........................................................................11
Ducting for Stand Alone Installations or Non-Ducted Installations..........................................................11
Ducting for Two Zone Installations ......................................................................................12
Model 76 – External Control or Crawl Space/Sealed Attic Control and Wiring...............................................13
Wiring the Dehumidifier to the HVAC System and Zone Dampers ...........................................................14
System Set Up and Checkout ...........................................................................................15
Installer Test Mode ....................................................................................................17
Start Up and Sequence of Operation.....................................................................................18
Single Zone Whole House or Stand Alone Using the Dehumidifier Control .......................................................18
Single Zone Whole House or Stand Alone Using Model 76 External Control ......................................................18
Crawl Space (Remote) Control Using Model 76 .............................................................................18
Two Zone – Primary and Secondary .......................................................................................18
Ventilation ............................................................................................................19
Installation and Wiring .................................................................................................19
Vent Auto & Vent-Timed ................................................................................................20
Outdoor Temperature Sensor Installation...................................................................................20
Determine Ventilation Requirements ......................................................................................21
Installer Settings ......................................................................................................22
Sequence of Operation .................................................................................................23
Troubleshooting .......................................................................................................24
Table 4 – Diagnostic Codes .............................................................................................24
Table 5 – Troubleshooting Guide .........................................................................................26
Service Parts..........................................................................................................27
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SPECIFICATIONS
Model 1830 Model 1850 & 1850W
Weight
Capacity
80°F, 60% RH Conditions
Power
115 VAC, Single Phase, 60Hz
Dehumidifier Inlet
Air Conditions
Filter
Airflow
Pressure ("w.c.) Airflow (CFM)
*Maximum design external static pressure.
70 pints per day @ 160 CFM 95 pints per day @ 245 CFM
External Static
0.0 160 0.0 245
0.2 120 0.2 215
0.4* 75 0.4 185
67 lbs. 70 lbs.
6.3A operating current 8A operating current
Dehumidification: 50°F – 104°F, 40°F dew point minimum
Ventilation: 40°F – 140°F, 0%RH – 99%RH (non-condensing)
SET UP DEHUMIDIFIER FOR INSTALLATION
MERV 8, washable
External Static
Pressure ("w.c.) Airflow (CFM)
0.6* 150
IMPORTANT: Cut the strap securing the compressor
shipping support bracket and remove the strap and shipping bracket.
See Figure 1.
FIGURE 1 – Remove Shipping Bracket
REMOVE SHIPPING BRACKET
CLIP OFF
PLASTIC STRAP
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SET UP DEHUMIDIFIER FOR INSTALLATION (CONTINUED)
DUCT COLLARS
STANDARD BASEMENT AND ATTIC INSTALLATIONS (FULLY DUCTED)
• Use the screws in the parts bag to attach the duct collars to the inlet and outlet of the dehumidifier. The outlet collar has a backflow damper.
• The outlet duct collar may be attached to the top or end of the unit. Move the outlet cover to the location not being used. See Figure 2.
• Make sure there are no bends in the ductwork coming off the outlet for a minimum of 4”. This will ensure that the ductwork will not interfere
with the backflow damper function.
CLOSET INSTALLATIONS
Use the screws provided in the parts bag to attach the duct collars if
desired or required based on recommendations below:
• Where inlet space is restricted, the inlet duct collar is optional.
• When the dehumidifier is installed below the HVAC equipment
and requires a vertical discharge, move the top access panel to the
end of the unit. The outlet duct collar with backflow damper is not
required. See Figure 3.
• When the dehumidifier requires a ducted vertical discharge,
remove the top access panel and remount on the outlet of the unit.
Install the outlet duct collar with backflow damper on top of the
unit. See Figure 3.
CRAWL SPACE, SEALED ATTICS OR
BASEMENT INSTALLATIONS
If dehumidifying the space in which the dehumidifier is installed, the
duct collars do not need to be installed. Leave the outlet cover on top
of the unit. See Figure 4.
FIGURE 2 – Fully Ducted Installations
INLET
DUCT
COLLAR
END DISCHARGE
INLET
DUCT
COLLAR
TOP DISCHARGE
OUTLET COVER
OUTLET DUCT
COLLAR W/BACK
DRAFT DAMPER
MOVE OUTLET
COVER AND
INSTALL OUTLET
DUCT COLLAR TO
TOP DISCHARGE
LOCATION
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FIGURE 3 – Closet Installations
UNDUCTED
INLET
UNDUCTED
INLET
4
UNDUCTED OUTLET
OUTLET
COVER
OUTLET DUCT
COLLAR W/BACK
DRAFT DAMPER
OUTLET
COVER
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FIGURE 4 – Non-ducted Installations
OUTLET COVER
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SET UP DEHUMIDIFIER FOR INSTALLATION (CONTINUED)
CONTROL LOCATION
The on-board control can be located on the top of the
dehumidifier or can be relocated to the front of the
dehumidifier if the control can not be seen/accessed in
the top orientation.
To move the control:
1. Remove the front control panel cover.
2. Remove the filter access door and filter.
3. Detach the on-board control by removing the four
(4) screws around the control. NOTE: Use one hand
to support the bottom of the on-board control when
removing.
4. Keep the control in the unit and relocate to the front
access hole.
5. Secure the control with the same four screws used
to attach the control to the top of the unit.
6. Secure the control panel cover to the top of the unit.
FIGURE 5 – Control Location
CONTROL
CONTROL
PANEL COVER
CONTROL
PANEL COVER
CONTROL
FILTER ACCESS DOOR
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HARD WIRING
WARNING
ELECTRICAL SHOCK HAZARD: 115-volts may cause serious injury or death from
electrical shock. Disconnect and tag electrical service before starting installation or
field-service. Leave electrical service disconnected until installation or field-service
is complete.
ELECTRICAL SHOCK HAZARD: An interrupted or broken ground may cause property
damage, serious injury or death should an electrical fault occur. The cabinet must
be grounded in accordance with NEC ANSI/NFPA 70-2011 or local codes. In Canada,
refer to Canadian Electrical Code CSA C22.1.
FIRE HAZARD: Use of improper wire may cause serious injury, property damage or
death due to fire. Do not use aluminum wire for electrical service to the dehumidifier.
Use only copper wire.
The Model 1830 dehumidifier can be modified for applications where hard wire power to 115VAC is required; the Model 1850W must be hard
wired. An electrical disconnect switch can be installed as needed to comply with appropriate codes or ordinances. The ON/OFF switch on the
dehumidifier interrupts the 115VAC service to the internal components of the dehumidifier, but does not disconnect the power supply at the
115VAC terminals on the dehumidifier.
United States Installations: Make all electrical connections in accordance with the current edition of the NEC ANSI/NFPA 70 and any local
codes or ordinances that may apply.
Canada Installations: Make all electrical connections in accordance with the current edition of the Canadian Electrical Code CSA C22.1 and
any local codes or ordinances that may apply.
Use of an undersized circuit
breaker may cause property
damage and/or the need for
mold remediation service. See
Specifications for wire and
circuit breaker sizing.
CAUTION
ELECTRICAL SPECIFICATIONS FOR HARD WIRING MODEL 1830 & 1850W
Model 1830 Model 1850W
Voltage
Minimum Circuit Capacity
Maximum Fuse or Circuit Breaker Amps
Minimum Wire Size AWG
110-120 VAC, 60 Hz, 1 phase 110-120 VAC, 60 Hz, 1 phase
9A 12A
16A 20A
14 14
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