Aprilaire 1730A User manual

Model 1730A Compact Dehumidifier
Installation Instructions
SPECIFICATIONS
Dimensions: Width: 12.5” cabinet, 13” with doors
Height: 14.5” cabinet, 18.5” with leveling feet
fully extended
Length: 22” cabinet, 27” with collars
Weight: 65 lbs.
Capacity: 65 pints/day @ 150 cfm
AHAM DH-1-2003 80°F, 60% RH conditions
Efficiency: 1.8 Liters per kilowatt hour
AHAM DH-1-2003 80°F, 60% RH conditions
Power: 115VAC, 60 Hz, 7A Operating Current @ 80°F/ 60% RH
Unit equipped with 8 ft. grounded power cord
15 Amp circuit required
Airflow:
Inlet Air Operating Conditions: 60°F to 95°F, 30% RH to 99% RH
Installation Conditions: 40°F to 140°F, 0% RH to 99% RH
Evaporator Frost Sensor: 25°F +/- 5°F, circuit opens (cut-out)
55°F +/- 5°F, reset temperature (cut-in)
Filter: MERV 8, washable
WARNING
1. 120 volts may cause serious injury from electric shock. Disconnect electrical power
before starting installation. Leave power disconnected until installation is complete.
2. Sharp edges may cause serious injury from cuts. Use care when cutting plenum
openings and handling ductwork.
3. Dropping may cause personal injury or equipment damage. Handle with care.
4. Do not remove the outlet screen. The screen is required to protect from moving parts
and electrical components.
CAUTION
1. Do not use in pool applications.
2. If unit has been shipped or stored on
its side, wait 24 hours before running.
3. Do not use solvents or cleaners on
or near the display or circuit board.
Chemicals can damage components.
P ("w.c.) Airflow (cfm)
0.0 230
0.2 220
0.4 190
UNPACKING AND CONTENTS
Do not tip unit to remove from carton.
1. Open carton completely using cut line shown along bottom
perimeter of carton.
2. Remove all cardboard inner pack (top edges and duct collars).
3. See Figure 1 for opening view and contents.
a. Installation Manual
b. Owner’s Manual
c. Model 76 Control
d. Outlet Collar with Back Flow Damper
e. 8 ft. Grounded Power Cord
f. Wiring Access Panel
g. Condensate Pan
a
b
f
d
g
c
e
FIGURE 1 – Carton Opening & Contents
90-1654

2-1/8" CLEARANCE
FOR LEVELING FEETVIBRATION ISOLATORS
FILTER ACCESS DOOR
OUTLET INLET
5-1/8"
FIGURE 3 – Suspended Installation
If hanging the unit, use 1/4” (minimum) threaded rod and two unistruts
to support the base just inside the leveling feet. It is recommended
that vibration isolators be placed between the unistruts and
dehumidifier base. See Figure 3. Do not position threaded rods over
filter access doors. There must be a minimum clearance of 12” on one
side of the unit to allow for removal of the filter.
SUSPENDED INSTALLATION
90-1427
MOUNT CONTROL
•Inanareathehomeownerwantstomonitorandcontrol
moisture levels.
•Onaninteriorwall.
•Approximately5’offthefloor.
•Atleast18”fromanoutsidewall.
DO NOT MOUNT CONTROL
• Intheflowofasupplyregister.
•Behinddoors,incornersorotherdeadairspaces.
•Indirectsunlight,nearlightingfixtures,orotherappliancesthat
give off heat.
•Onanoutsideorunconditionedareawall.
•Instairwellsornearoutsidedoors.
•Onawallwithconcealedpipesorductwork.
FIGURE 4 – Mounting Control
90-1640
DEHUMIDIFIER CONTROL LOCATION
LOCATION CONSIDERATIONS
1. Install Unit Indoors: Do not expose to elements.
2. Drain Accessibility: If a drain is not located in the
installation area, a condensate pump may be required.
3. Power: Outlet within 8 feet of unit.
4. Filter Access: Allow for 12” clearance on one side of
the unit for removal of filter. (Figure 2)
5. Inlet: If inlet is not ducted, a minimum of 6” of open
space is required from the inlet panel to an adjacent
surface.
TOP VIEW
FILTER 12" MINIMUM CLEARANCE
FOR FILTER
(EITHER SIDE)
6" MINIMUM CLEARANCE
FOR PROPER AIR FLOW
90-1426
FIGURE 2 – Filter
Access Clearance
2

MECHANICAL INSTALLATION
The dehumidifier can be installed as shipped, with the supply collar
on the outlet panel, or if space is restricted, the supply collar can be
relocated to the top of the unit.
TOP MOUNT SUPPLY COLLAR (FIGURE 5)
1. Remove the four screws securing the supply collar (with backflow
damper) and screen to the outlet panel.
2. Remove the four screws securing the top mounted outlet cover plate.
3. Attach screen and supply collar with damper to the top of the unit.
4. Attach outlet cover plate to the outlet panel.
SUPPLY COLLAR FIGURE 5 – Top Mount Supply Collar
90-1655
Supply collar
mounted to
top of unit
Outlet cover
plate moved to
outlet panel
OUTLET VIEW
MOUNT CONTROL
PULL APART
FRONT COVER
BACKING
PLATE
DH
DH
R/+
C/
-
B
A
FIGURE 6 – Disassemble Control
90-1631
BACKING PLATE
ANCHOR
SCREW
DH
DH
R/+
C/
-
B
A
FIGURE 7 – Mount Backing Plate
90-1632
Required Components
18 – 24 gauge wire (field supplied) – 4 wires required, run new cable as needed.
(2) #8 x 1-1/2” mounting screws (supplied)
(2) Anchors (supplied)
1. Level the backing plate on the wall and mark the mounting holes and wire access location on the wall.
2. Drill two 3/16” mounting holes and a 3/4” wire access hole. See Figure 7.
3. Install the drywall anchors flush with the wall surface. Note: Mounting holes on the backing plate are designed to fit on a horizontal J-box.
4. Run a 4-wire cable from the dehumidifier to the wall mount location and through the square hole in the backing plate.
5. Secure the backing plate to the wall using the two #8 x 1-1/2” screws.
6. Connect wires to the C/-, R/+, and both DH terminals on the backing plate. Important: Note wire colors used for each terminal and match
with connections at the dehumidifier (see WIRING on page 6).
7. Push excess cable into the wire access hole and fill the hole with insulation. Note: Failure to seal the hole can cause drafts to enter the
control and affect sensing accuracy.
3

Run vinyl or pvc tubing from the 3/4” drain outlet on the dehumidifier inlet to a floor drain. Make sure the drain line has a constant downward
slope and is not kinked. Refer to local codes to determine if a p-trap is required. In attic installations the supplied condensate pan with a field
supplied float switch is required. See Condensate Pan and Float Switch section for installation and wiring instructions.
DRAIN
The feet can be adjusted to level the unit and/or to accommodate
a p-trap. Leveling is required to ensure proper drainage from the
dehumidifier. See Figure 8.
LEVELING
7/8" MINIMUM
4" MAXIMUM
FIGURE 8 – Leveling
90-1498
If the dehumidifier is installed in an attic or an area requiring leak protection, the unit must be placed the supplied condensate pan with a field
supplied normally closed condensate overflow safety switch (float switch). The float switch should be wired to the FLOAT SWITCH terminals on
the circuit board on the outlet panel. The compressor is disabled when the float switch is open.
CONDENSATE PAN AND FLOAT SWITCH
2"
2"
2"
2"
FLOAT SWITCH
(FIELD SUPPLIED)
MODEL 4911
CONDENSATE PAN
2" MIN.
LEVELING FEET (4)
MODEL 1730A
DEHUMIDIFIER
WIRING ACCESS
FIGURE 9 – Install Dehumidifier
in Condensate Pan
90-1656
TO FLOAT SWITCH
FLOAT SWITCH
REMOTE
G-STAT
R-HVAC
G-HVAC
FIGURE 10 – Wiring Float Switch
to Dehumidifier Control Board
90-1475
FLOAT SWITCH INSTALLATION AND WIRING
1. Install a float switch (field supplied) on any side of the condensate
pan. Refer to the instructions provided with the float switch for
proper installation.
2. The wires from the float switch are to be routed through the wiring
access panel in the back of the dehumidifier (see Figure 9).
Remove the wiring access panel and pull the FLOAT SWITCH
terminal block off the circuit board. Remove the float switch jumper
wire and wire the float switch to the FLOAT SWITCH terminals.
Plug the terminal block back into the circuit board (see Figure 10).
CONDENSATE PAN INSTALLATION
1. Raise the unit so that the bottom of the dehumidifier drain tube is
at least 2” off the floor (see Figure 9) and so that the dehumidifier
is level front to back and side to side.
2. Install the dehumidifier so that all four sides of the dehumidifier
and the drain tube are inside the condensate pan (see Figure 9).
4

DUCTWORK INSTALLATION
The dehumidifier is supplied with two 8” round collars. An integral backflow damper is installed in the outlet collar. In a ducted installation,
the dehumidifier pulls air from the living space or HVAC return duct and supplies the dehumidified air to the HVAC supply duct.
DUCTED INSTALLATION
• Movesupplycollartothedesiredlocation,ifnecessary.(SeeSupply Collar in MECHANICAL INSTALLATION section.)
• Usetheleastamountofductworkpossible.Toensurebestperformance,donotexceedatotalof50feetofductinstalledinaccordancewith
SMACNA Standards. UL approved, 8” diameter, insulated duct is recommended for all connections.
• Alljointsandseamsmustbesealed.
ATTIC INSTALLATIONS
CONDENSATE PAN
8" DIA. INSULATED DUCT
BOTH SIDES
FILTER
AIR HANDLER
6" MIN.
6 FT. MIN.
PLENUM BOX OR Y-FITTING
FIGURE 11 – Preferred Attic Installation
90-1618-2
8" DIA. INSULATED DUCT
BOTH SIDES
CONDENSATE PAN
FILTER
24"
MIN.
PLENUM BOX
6" MIN. 6" MIN.
0.4" w.c. MAX.
PLENUM
AIR HANDLER
FIGURE 12 – Alternate Attic Installation
90-1618-4
The Preferred Installation ensures warm, dehumidified air is thoroughly mixed with HVAC system air before being discharged into the living
space. If adequate space exists between the supply plenum and the first branch, allowing for proper mixing with the HVAC system air, the
dehumidifier discharge may be ducted to the supply side. The Alternate Installation minimizes re-evaporation of moisture off the cooling coil.
Attic installations require the dehumidifier to be installed in the supplied condensate pan with a field supplied float switch. Vibration isolators
placed under the dehumidifier feet are recommended when the dehumidifier is installed on ceiling joists.
CLOSET INSTALLATION
HVAC / FURNACE
DEHUMIDIFIED AIR IS
SUPPLIED DOWNSTREAM
FROM A-COIL TO MINIMIZE
EVAPORATION OFF A-COIL
2 FT INSULATED
FLEX DUCT ON INLET
TO REDUCE NOISE
DEHUMIDIFIER
FIGURE 13
90-1618-7
HVAC / FURNACE
DEHUMIDIFIER
DEHUMIDIFIED AIR IS
SUPPLIED DOWNSTREAM
FROM A-COIL TO MINIMIZE
EVAPORATION OFF A-COIL
AIR IS PULLED
FROM RETURN
DUCT
FIGURE 14
90-1618-6
BASEMENT INSTALLATION
CAUTION
Ensure return grill in door is not obstructed so dehumidifier
does not pull from HVAC system.
5

STAND ALONE INSTALLATIONS
DEHUMIDIFIER
AIR IS PULLED FROM
INSTALLED SPACE
DEHUMIDIFIED AIR
IS SUPPLIED TO
INSTALLED SPACE
FIGURE 15 – Stand Alone, Non-Ducted
90-1423
LIVING
SPACE
DEHUMIDIFIER
FIGURE 16 – Stand Alone, Ducted
90-1423
In a free standing installation, the dehumidifier pulls air from the installed space and returns the dehumidified air back to that space. See Figure 15.
•Placeunitinareawithdrainaccessandwithin8’ofanoutlet.
•Unitcanalsobeductedtopullandreturntoasinglelivingspace.SeeFigure 16.
WIRING
Required Components
18-24 gauge, 3-wire stranded cable
1. Disconnect power to the dehumidifier and HVAC system.
2. Remove the wiring access panel on the dehumidifier outlet panel.
3. Run a 3-wire cable from the dehumidifier to the furnace/air
handler.
4. At the HVAC equipment, disconnect the thermostat wire from the
Gterminal. Wire nut this wire to one of the wires (G-STAT) from
the 3-wire cable. Connect the remaining two wires to the HVAC R
terminal (R-HVAC) and the HVAC Gterminal (G-HVAC).
5. Unplug the G-STAT, R-HVAC, and G-HVAC terminal block from
the circuit board. Make the connections shown in Figure 17.
6. Plug the terminal block back into the circuit board.
7. Unplug the REMOTE terminal block from the circuit board.
Connect the DH wires from the Model 76 to the REMOTE
terminals as shown in Figure 17.
DUCTED INSTALLATIONS WITH A FLOAT SWITCH (ATTIC, CLOSET, ETC.)
8. Plug the terminal block back into the circuit board.
9. Pull the Dehumidistat C and Dehumidistat R wires out of the
wiring access panel and remove the wire nuts.
10. Using the wire nuts, make the final two connections with the
4-wire cable to C/- and R/+ as shown in Figure 17.
11. Remove the FLOAT SWITCH terminal block from the circuit
board. Make the connections shown in Figure 17.
12. Replace the wiring access panel on the unit.
13. Snap the Model 76 front cover on the backing plate. The 6-pin
terminal aligns with the terminal block receptacle on the backing
plate.
14. Proceed to SYSTEM CHECKOUT on page 9.
6

HVAC EQUIPMENTTHERMOSTAT
Y
G
W
Y
R
CC
R
W
G
MODEL 76 CONTROL
FLOAT
SWITCH
DEHUMIDISTAT R
DEHUMIDISTAT C
DH
DH
R/+
C/-
B
A
FIGURE 17
90-1646
Required Components
18-24 gauge, 3-wire stranded cable
1. Disconnect power to the dehumidifier and HVAC system.
2. Remove the wiring access panel on the dehumidifier outlet panel.
3. Run a 3-wire cable from the dehumidifier to the furnace/air
handler.
4. At the HVAC equipment, disconnect the thermostat wire from the
Gterminal. Wire nut this wire to one of the wires (G-STAT) from
the 3-wire cable. Connect the remaining two wires to the HVAC R
terminal (R-HVAC) and the HVAC Gterminal (G-HVAC).
5. Unplug the G-STAT, R-HVAC, and G-HVAC terminal block from
the circuit board. Make the connections shown in Figure 18.
6. Plug the terminal block back into the circuit board.
INSTALLATIONS WITHOUT A FLOAT SWITCH (BASEMENT, ETC.)
G
W
R
CC
R
Y
W
G
Y
THERMOSTAT HVAC EQUIPMENT
MODEL 76 CONTROL
DEHUMIDISTAT R
DEHUMIDISTAT C
DH
DH
R/+
C/-
B
A
FIGURE 18
90-1646
7. Unplug the REMOTE terminal block from the circuit board.
Connect the DH wires from the Model 76 to the REMOTE
terminals as shown in Figure 18.
8. Plug the terminal block back into the circuit board.
9. Pull the Dehumidistat C and Dehumidistat R wires out of the
wiring access panel and remove the wire nuts.
10. Using the wire nuts, make the final two connections with the
4-wire cable to C/- and R/+ as shown in Figure 18.
11. Replace the wiring access panel on the unit.
12. Snap the Model 76 front cover on the backing plate. The 6-pin
terminal aligns with the terminal block receptacle on the backing
plate.
13. Proceed to SYSTEM CHECKOUT on page 9.
7

When the dehumidifier is not wired to the HVAC system, air is pulled through the unit, dehumidified, and circulated solely by the dehumidifier
blower. No additional components are required for this configuration. The 24 VAC wires to power the control off the dehumidifier transformer
are located inside the wiring access panel.
STAND ALONE INSTALLATIONS
FLOAT
SWITCH
MODEL 76 CONTROL
DEHUMIDISTAT R
DEHUMIDISTAT C
DH
DH
R/+
C/-
B
A
FIGURE 19
90-1646
Note: If float switch is not required,
keep the factory supplied jumper
installed in FLOAT SWITCH terminals.
1. Disconnect power to the dehumidifier.
2. Remove the wiring access panel on the dehumidifier outlet panel.
3. Unplug the REMOTE terminals from the circuit board. Connect
the DH wires from the Model 76 to the REMOTE terminals as
shown in Figure 19.
4. Plug the terminal block back into the circuit board.
5. Pull the Dehumidistat C and Dehumidistat R wires out of the
wiring access panel and remove the wire nuts.
6. Using the wire nuts, make the final two connections with the
4-wire cable to C/- and R/+ as shown in Figure 19.
7. Remove the FLOAT SWITCH terminal block from the circuit
board. Make the connections shown in Figure 19.
8. Replace the wiring access panel on the unit.
9. Snap the Model 76 front cover on the backing plate. The 6-pin
terminal aligns with the terminal block receptacle on the backing
plate.
10. Proceed to SYSTEM CHECKOUT on page 9.
8

SYSTEM CHECKOUT
POWER UP
1. Check all wiring and restore power to the
HVAC equipment.
2. Plug in the dehumidifier and turn on/off
switch ON.
 •CheckLEDindicatorslocatedbelow
the wiring access panel (see below).
Verify the green POWER LED is on.
The green LED is on when power is
applied to the system.
 •Model76Control:Aftera4second
start up sequence all buttons on the
Model 76 will be functional.
– The control will display the
measured humidity.
FIGURE 20
90-1636
Model 76 Control
Model 76 LCD Display
Blinking ON +*: Control Limit Exceeded.
See Control Limits, page 10.
Solid ON:
Control On
Blinking ON:
Dehumidifying
Measured
Humidity or
Setting
Control On/Off
Humidity Setting
and Offset
Adjustment
Control must be
ON to adjust offset
and setting.
SET: Shows when
humidity setting
displayed or being
changed.
OFF: Control Off
TEST MODE
1. Press and hold the ON button for 5 seconds to enter Test Mode.
a. Verify the measured humidity is displayed on the screen.
b. Verify the dehumidifier turns on and ON blinks on the screen.
c. If wired to the HVAC system, verify the HVAC fan turns on.
d. After 3 minutes, if still in TEST MODE, the compressor will turn on.
e. Check LED indicators. The green POWER LED will remain on. If the red FAULT LED is on, refer to the TROUBLESHOOTING GUIDE.
The red LED turns on when a fault condition is active.
2. After 5 minutes or after pressing the OFF button, the control will enter Off mode.
a. Verify the dehumidifier turns off.
b. If wired to the HVAC system, verify the HVAC fan turns off.
HUMIDITY SETTING
• ThecontrolmustbeONtoadjustthehumiditysetting.
• The (up) and (down) buttons are used to increase or decrease the humidity setting.
• ThefirstpressofeitherbuttonwilldisplaythecurrentsettingontheLCDdisplayandSETwillbedisplayedbelowthe%sign.
• Eachsubsequentpushoftheupordownbuttonswillchangethesettingby1%.
• Ifabuttonishelddown,thesettingwillcontinuallychangeby1%foraslongasthebuttonispressed.
• ThecontrolwillreturntoNormalMode,displayingthemeasuredhumidity,5secondsafterthelastbuttonpress/release.
LED indicators
90-1656
9

SEQUENCE OF OPERATION
The Model 76 Control continually measures the humidity of the space in which it is located and controls to the humidity setting.
Normal Mode
• Whenthemeasuredhumidityisgreaterthanthesetting,thecontrolwillactivatethedehumidifieroutput.
– Model 76: ON will blink on the display.
– Dehumidifier: The dehumidifier blower will turn on and the DEH FAN Amber LED on the circuit board (middle LED, not visible unless wiring
access panel is removed) will illuminate. The HVAC system blower, along with the HVAC FAN Amber LED (top LED, not visible unless wiring
access panel is removed) will turn on if the dehumidifier is wired to the HVAC system. Note: The HVAC FAN LED will turn on regardless
of wiring to the HVAC system. After three minutes of blower operation, the dehumidifier compressor will turn on along with the COMPR
Amber LED (bottom LED, not visible unless wiring access panel is removed).
• Whenthemeasuredhumidityfalls3%RHbelowthesetting,thecontrolwilldeactivatethedehumidifieroutput.
– Model 76: ON will stop blinking on the display.
– Dehumidifier: The compressor and dehumidifier blower will turn off. If wired to the HVAC system, the HVAC blower will also turn off unless
the system thermostat keeps it running. All Amber LEDs will turn off.
Control Limits
• Ifthecontrolmeasuresadew point below 40°F OR a temperature above 99°F, the control will deactivate the dehumidifier output if
actively dehumidifying, the dehumidifier will stop dehumidifying, and ON and *will blink on the display.
• Thecontrolwillresumenormaloperationwhenthemeasureddewpointisgreaterthan45°Forthemeasuredtemperatureisbelow94°F,
depending on which control limit was exceeded.
OFFSET
An offset can be applied to the humidity reading to avoid discrepancies with other humidity measuring
devices in the home. Allow 48 hours for the control to acclimate before applying an offset. The control
must be ON to enter the Offset screen.
• PressandholdtheOFFbuttonfor5secondstoentertheOffsetscreen.
• The buttons can be used to set an offset value between -5% RH and +5% RH.
• ThecontrolwillreturntoNormalMode,displayingthemeasuredhumidity,5secondsafterthelast
button press/release.
FIGURE 21 – Offset Screen
90-1638
TURNING ON AND SETTING CONTROL
1. Press the ON button.
2. Use the buttons to set the control at 59%.
Increasing the humidity setting will decrease dehumidifier run time, allowing for higher humidity levels.
Decreasing the humidity setting will increase dehumidifier run time, allowing for lower humidity levels.
10

Technical Support is available Monday through Friday, 7:00 a.m. to 5:00 p.m. CST, at [phone]. Use the guides that follow to help find and
correct system faults. Contact Technical Support before replacing the control or for additional troubleshooting.
When the control detects an internal error, it will stop controlling, deactivate the dehumidifier
output, and the display will show the Error Code. See Figure 22. The control will attempt to recover
from the error every 10 minutes. The Error Code will continue to be displayed as long as the error
condition exists. Button presses are not registered when in Error Mode. Cycling power to the control
will not clear the code and the control will need to be replaced if the error code persists.
ERROR CODES
FIGURE 22 – Error Code Screen
90-1645
TROUBLESHOOTING
TABLE 1 – Model 76 Troubleshooting Guide
Symptom Possible Reason Troubleshooting Procedure
No power to the control. Incorrect wiring. Verify wiring connections between control, dehumidifier
and HVAC system (where applicable).
No power to dehumidifier. •VerifythatthedehumidifierpowerswitchisON.
•Verifythecircuitbreakerhasnottripped.
No power to HVAC equipment. •VerifyHVACsystemswitchison.
•Verifythecircuitbreakerhasnottripped.
Control does not turn on
dehumidifier output.
Incorrect wiring. Verify wiring connections between control and
dehumidifier.
Control does not turn on HVAC fan. Incorrect wiring. Verify wiring connections between dehumidifier and
HVAC system.
Display does not flash all LCD
segments during Test Mode.
LCD error. Replace control.
Display shows Er. Control detected an internal error. The control will need to be replaced.
Inaccurate humidity reading. Control recently installed after being stored in an
uncontrolled temperature and humidity environment.
Allow 48 hours for control to acclimate.
Offset has been applied to the humidity reading. Change the offset.
Control is mounted in direct sunlight, above a heat or
humidity source, or in the path of a supply register.
Relocate the control.
11

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10009848 3.12
B2205736A
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© 2012 Aprilaire – A division of Research Products Corporation
TABLE 2 –Dehumidifier Troubleshooting Guide
Symptom Possible Reason Troubleshooting Procedure
Red LED On.
Blower and compressor
not running.
Open float switch. •Iffloatswitchnotinstalled,confirmjumperinstalledatFLOATSWITCHterminals.
•Iffloatswitchinstalled,confirmswitchisnotopen.
•Clearobstructionindrainpan/tubing.
Red LED On.
Blower is on but
compressor not running.
High system pressure, high discharge
line temperature due to lack of airflow or
excessive inlet temperature.
•Checkdehumidifierairfilterandwashorreplace.
•Checkforblockedductworkandclear.
Dehumidifier blower is
running but little or no
airflow.
Pressure drop across dehumidifier is
higher than 0.8”w.c.
•Checkdehumidifierairfilterandwashorreplace.
•Checkforblockedductworkandclear.
•Checkifbackflowdamperisblockedorstuck.Removeobstruction.
Blower is running but
compressor is not.
Coil is frosting. •Lackof,orreducedairflow,check/cleanfilter.
•Inletairconditionstoolow(below60°F),increaseModel76setpoint.
Blower 3 minute minimum on time. Wait 3 minutes. Compressor will not start until blower has run for 3 minutes.
Dehumidifier is not
draining properly.
Incorrect drain installation. •Checkdrainlineforcontinuousdownwardslope.
•Verifytherearenokinks,trapsordebrisinthedrainline.
•Ifdraintrapinstalled,confirmtrapisproperlyinstalled,clearandprimed.
•Unitisnotlevel,adjustfeet.
The dehumidifier does
not run.
No power to unit. Green LED is off
(15 amp circuit required).
•Checkthattheon/offswitchonthedehumidifierisON.
•Checkifcircuitbreakerhastripped.
Model 76 Control is OFF. Turn on Model 76. See Table 1 for additional Model 76 troubleshooting steps.
Dehumidifier is loud
when operating.
Fan noise. If inlet is not ducted to HVAC return, install approximately 2’ of 8” flex duct on the
inlet collar.
Vibration. Install vibration isolators under dehumidifier feet.
Dehumidifier is
producing hot air.
The dehumidifier normally produces
heated, dry air. Better mixing with the
HVAC system air is needed.
•Changeductingtoallowformaximummixing.SeeDUCTWORK INSTALLATION
on page 5.
•WiredehumidifiertotheHVACsystem.