Anden A320v1 User manual

DEHUMIDIFER CONTROL

ON/OFF BUTTON

USED TO TURN

DEHUMIDIFIER ON

AND OFF

UP/DOWN

BUTTONS USED TO

CHANGE HUMIDITY

SETTING

MODE BUTTON

USED FOR

OPTIONAL FEATURES

INLET

FILTER

OUTLET

SAFETY INSTRUCTIONS

WARNING

1. High voltage 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. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of

experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible

for their safety. Children should be supervised to ensure that they do not play with the appliance.

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. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualiﬁed persons in order to avoid a hazard.

READ AND SAVE THESE INSTRUCTIONS

Model A320V1 and A320V3 Dehumidifier

Installation and Operating Instructions

90-2432

10013678 B2208381E 10.21 English 1

TABLE OF CONTENTS

SAFETY INSTRUCTIONS � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1

SPECIFICATIONS � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3

UNPACKING THE DEHUMIDIFIER � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4

LOCATION CONSIDERATIONS � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4

FLOOR MOUNTING � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �5

SUSPENDING THE DEHUMIDIFIER � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6

Install Brackets for Suspending Unit � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6

Hanging the Dehumidifier� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6

Ducting� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6

DRAIN INSTALLATION � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �7

Condensate Pan, Condensate Pump and Float Switch � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �7

HARD WIRING – LINE VOLTAGE� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8

START UP AND SEQUENCE OF OPERATION � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9

Using the Dehumidifier Control � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9

Using Model A77 Control � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9

SYSTEM SET UP & CHECKOUT � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �10

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WIRING AND SET-UP� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 11

Model A77 Control� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 11

Alternative External Control � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �12

DAISY CHAIN WIRING � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 13

Model A77 Control as Driving Control� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 13

Alternative External Dry Contact Control as Driving Control� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �14

CODES � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �15

TROUBLESHOOTING � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �16

Table 1 – Diagnostic Codes � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �16

Table 2 – Troubleshooting Guide � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �17

SERVICE PARTS � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �18

LIMITED WARRANTY � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �19

2 English

SPECIFICATIONS

Ø 3/4" FNPT DRAIN

17-5/8

1-11/16

4-7/16

32-11/16

25 UP TO 1/2" DIAMETER ROD

90-2433

FIGURE 1 – DIMENSIONS (INCHES)

ELECTRICAL A320V1 A320V3

Voltage 208-240 VAC (~), 1ø, 60 HZ 277 VAC (~), 1ø, 60 HZ

Operating Current 11�1A @ 80°F, 60% RH 9�1A @ 80°F, 60% RH

Efficiency 2�9 L/kW-hr (6�0 pints/kW-hr)

@ 80°F, 60% RH

2�6 L/kW-hr (5�5 pints/kW-hr)

@ 80°F, 60% RH

ENVIRONMENTAL

Operating Temperature Range 50°F – 104°F

Operating Dew Point Lower Limit 40°F

MECHANICAL

Weight 180 lbs (without packaging)

Drain Size 3/4" FNPT

Capacity 320 PPD @ 80°F, 60% RH

Filter MERV 11

Airflow 830 CFM (free flow)

DIMENSIONS

English 3

UNPACKING THE DEHUMIDIFIER

Use the cut line on the carton to pulll carton off dehumidfier�

INCLUDED IN THE CARTON

• Dehumidifier

• Installation manual

• Hanging brackets

• Model A77 control

• 3/4" P-Trap

• 3/4" MNPT x 3/4" female pipe

• 3/4" FNPT x 3/4" female pipe

• 3/4" x 3/4" x 3/4" T-fitting

• Terminal screwdriver

• 30 feet of thermostat cable

• MERV 11 filter

18"

MIN.

18"

MIN.

INLET SIDE

ELECTRICAL

SERVICE PANEL

90-2434

FIGURE 2 – SPACE CLEARANCES

LOCATION CONSIDERATIONS

This appliance is classified as to not be accessible to the general public�

The dehumidifiers should be spaced evenly throughout the area to be

dehumidified with the following recommendations:

1. Avoid placement where the discharge of one dehumidifier is

pointing toward the inlet of another�

2. Avoid locating the dehumidifier inlet too near a supply register�

Space is not usually available to totally avoid this, but minimizing

the amount of cold air that is discharged to the dehumidifier inlet

will improve moisture removal performance of the dehumidifier�

3. Account for handling dehumidifier condensate by considering drain

or sump pump locations�

4. Allow sufficient space near the inlet (18" minimum) to be able to

remove/install a filter� More space ensures no loss of airflow due to

restriction at the inlet�

4 English

INCLUDED WITH

DEHUMIDIFIER

3-1/2"

BLOCKING MUST BE USED FOR P-TRAP CLEARANCE

90-2443 90-2438

FIGURE 3 – LEVELING FEET ASSEMBLY FIGURE 4 – FLOOR MOUNTING

FLOOR MOUNTING

The 5789 leveling feet kit (not included) is required for floor mounting� The drain hose must continuously slope downward toward the drain� Use solid

supports as needed to elevate the unit enough to allow for continuous drain slope� Use the adjustable feet to level the unit right to left and front to

back so that unit drains properly�

English 5

SUSPENDING THE DEHUMIDIFIER

INSTALL BRACKETS FOR SUSPENDING UNIT

The brackets are designed to accommodate up to 1/2" threaded rod�

1. Insert bracket into slots on the base� See FIGURE 5�

2. Rotate the bracket up toward the dehumidifier and secure the bracket to the side of the dehumidifier using #12 sheet metal screws (provided)�

This can be done with a 5/16" hex socket� See FIGURE 6�

3. Repeat for remaining three brackets�

HANGING THE DEHUMIDIFIER

Use the threaded rod to suspend the unit

from appropriate ceiling structure� The unit

weight is 180 lbs� Install vibration isolators

if located in an area where noise could be

a concern� Level unit right to left and front

to back so that unit drains properly�

DUCTING

Use duct kit part number 5807 for

installing ductwork to the dehumidifier�

Reference the instructions provided with

duct kit 5807 for installation details�

INSERT BRACKET INTO

OPENINGS ON BOTTOM

OF UNIT – 4 PLACES

ROTATE BRACKET

INTO PLACE AND SECURE

WITH SCREWS PROVIDED

4X VIBRATION

ISOLATORS

(OPTIONAL)

90-2435 90-2436

90-2437

FIGURE 5 – INSTALL MOUNTING BRACKET IN BASE FIGURE 6 – SECURE BRACKET TO DEHUMIDIFIER

FIGURE 7 – SUSPENSION

6 English

DRAIN INSTALLATION

The blower draws air through the

dehumidifier, putting the cabinet under

negative pressure� As a result, the included

P-trap is required for proper draining� The

installed drain fitting on the dehumidifier

is 3/4" FNPT� Use the included fittings to

trap and install the drain� See FIGURE 8�

The drain tubing can be hard pipe or clear

flexible tubing� NOTE: PTFE thread seal

tape is recommended for the threaded

connections and hand tighten only�

Use PVC primer and cement for all slip

fit connections to prevent leaks� After

installing the drain connections, trap, and

tubing, pour enough water (about 2 pints)

into the dehumidifier drain pan to prime

the trap�

If the drain tubing will be installed to a

condensate pump, or if a common drain

tube will serve multiple dehumidifiers

or air conditioners, a vacuum break is

recommended to prevent the p-trap from

being unintentionally siphoned� Install a

T-fitting with a short section of drain tubing

pointed vertically and extending above the

start of the filter (see FIGURE 8)� Install the

vacuum break after the P-trap�

CONDENSATE PAN, CONDENSATE PUMP AND FLOAT SWITCH

A condensate pan is recommended when suspending

the dehumidifier over finished areas or product� Adhere

to local codes regarding draining of the condensate

pan� If a condensate pump is needed, install it in the

condensate pan as well�

Install a condensate overflow safety switch (i�e� float

switch) in the condensate pan, remove the factory

installed jumper wire between the Float Switch

terminals on the control and wire the float switch to the

dehumidifier as shown in FIGURE 9� Overflow safety

switches on condensate pumps can be wired to the

Float Switch terminals in a similar fashion�

3/4" MNPT x 3/4" BARB

(INCLUDED)

3/4" FEMALE PIPE x 3/4" FNPT

(INCLUDED)

3/4" MNPT x

3/4" FEMALE PIPE

(INCLUDED)

3/4" FLEXIBLE TUBE

(INCLUDED)

FLOAT

Switch

DH DH

NORMALLY CLOSED

FLOAT SWITCH

90-2438

90-1857

FIGURE 8 – DRAIN ASSEMBLY

FIGURE 9 – FLOAT SWITCH WIRING

PVC HARD PIPE

(NOT INCLUDED)

OPTIONAL VACUUM BREAK

HIGHER THAN

FILTER FRAME

3/4" PIPE TEE (INCLUDED)

3/4" MNPT x

3/4" FEMALE PIPE

(INCLUDED)

P-TRAP (INCLUDED)

English 7

HARD WIRING – LINE VOLTAGE

CAUTION

If the supply cord is damaged, it must be replaced by the

manufacturer, its service agent or similarly qualiﬁed persons in

order to avoid a hazard.

The A320V1 dehumidifier comes with a power cord that has a NEMA

6-20P plug that can simply be plugged into a corresponding NEMA

6-20R receptacle� The A320V3 dehumidifier comes with a power

cord that has a NEMA L7-20P plug that can simply be plugged into a

corresponding NEMA L7-20R receptacle� The plug can be removed and

replaced by hard-wired electrical service if desired�

United States Installation: 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 Installation: 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�

Model A320V1 Model A320V3

Voltage 208-240 VAC,

single phase, 60Hz

277 VAC,

single phase, 60Hz

Recommended

Breaker Size 20A 20A

Recommended Wire

Gauge 12 Gauge, Copper 12 Gauge, Copper

Maximum Fuse or

Breaker Size (MOCP) 30A or lower 25A or lower

Minimum Circuit

Ampacity (MCA) 21�9A at 208V 18�5A at 277V

1. Disconnect electrical service at the main fuse or circuit breaker�

2. Run electrical service to where the dehumidifier is to be installed

following all required local and national codes and standards�

3. Remove the side panel from the dehumidifier�

4. Loosen the terminal screws securing the power cord wires to the

terminal blocks and ground lug�

5. Use channellock pliers to remove the strain relief and power cord

from the unit� Pinch the side of the strain relief to release it from the

opening in the sheet metal and pull it away from the dehumidifier�

6. Route the service wires through the opening in the dehumidifier and

secure the cable or conduit to the opening in the dehumidifier using

fittings/clamps intended for the conduit/cable used�

7. Insert the black service wire into the L1 terminal and the white

service wire into the L2 terminal� Secure the wires into the terminals

by tightening the terminal screws�

8. Insert the ground wire (bare or green) of the electrical service into

the ground lug and secure it in place by tightening the ground lug

screw�

9. Reattach the side panel to the dehumidifier�

10. Restore electrical service at the fuse or circuit breaker�

CONNECT THE

BARE OR GREEN

GROUND WIRE

TO THE GROUND

LUG AS SHOWN

CONNECT THE LINE (BLK) AND

NUETRAL WIRE (WHT) WIRES

TO THE POWER BLOCK AS SHOWN

DISCONNECT POWER

CORD WIRES

L1 L2 G

ELECTRICAL

SERVICE PANEL

HARD

WIRING

ACCESS

L1 L2 G

90-2439

FIGURE 10 – HARD WIRING TO REPLACE THE POWER CORD

8 English

START UP AND SEQUENCE OF OPERATION

USING THE DEHUMIDIFIER CONTROL

1. Press the ON/OFF button to turn the dehumidifier control ON� The display will show the current setting, and the dehumidifier blower will turn on

to start sampling the air�

The setting will be replaced by the measured humidity and “AIR SAMPLING” will show on the display�

2. Use the UP or DOWN button to adjust the humidity setting as desired�

3. After three (3) minutes of sampling, the measured humidity will be compared to the setting:

a. If the humidity is above the setting, the dehumidifier compressor turns on and “AIR SAMPLING” will be replaced by “DEHUMIDIFYING”� The

compressor remains on until the measured humidity falls 3% RH below the setting�

b. If the measured humidity is below the setting, the blowers turn off and the display returns to showing the RH setting�

4. The dehumidifier will sample again after the number of minutes selected during the Air Sampling portion of the SYSTEM SET UP (see page 10), or

any time the humidity setting is lowered�

USING THE MODEL A77 CONTROL

1. Press the ON/OFF button to turn the dehumidifier control ON� “REMOTE” will show on the display to indicate that an external control is wired to

the dehumidifier�

2. At the Model A77, press the ON button; the Model A77 will display the measured RH�

3. Use the UP or DOWN button on the Model A77 to adjust the humidity setting as desired�

4. If the RH measured by the Model A77 rises above the setting, the dehumidifier will turn on� “DEHUMIDIFYING” will appear on the dehumidifier

control display to show that the Model A77 is calling for dehumidification� The dehumidifier will turn off when the RH measured by the Model A77

drops 3% RH below the setting�

English 9

INSTALLER TEST MODE

If everything is properly wired, the dehumidifier and all of the

wired components will turn on and off during Installer Test

Mode to demonstrate that all are properly operating� Installer

Test Mode lasts for four (4) minutes� If the ON/OFF button is

pressed during test mode, the dehumidifier will exit Installer

Test Mode and return to the OFF screen�

DEHUMIDIFICATION ONLY

90-1854

If the dehumidifier is not

already OFF, press the ON/

OFF button to turn it off�

90-1854

Press and hold the ON/

OFF button and MODE

buttons for 3 seconds� The

measured humidity, AIR

SAMPLING and TEST will

show on the display�

90-1854

After three (3) minutes the

dehumidifier compressor

will turn on and

DEHUMIDIFYING will

replace AIR SAMPLING on

the control screen�

90-1854

After one minute of

compressor operation, all

outputs will turn off and

DONE will blink for 3

seconds and then return to

the OFF screen�

90-1854

SYSTEM SET-UP & CHECKOUT

Skip set up and proceed to INSTALLER TEST MODE on page 10 unless:

• A Model A77 or other external control is to be installed

• changing the air sampling rate

1. Check all wiring�

2. Make sure the wire access cover has been snapped back onto the

on-board control�

3. Plug unit in and turn power switch to ON�

4. The on-board control screen should display OFF�

90-1854

NOTE: If the display backlight is not on, the first button press (any

button) will only turn on the backlight� Press the button a second time

to achieve function�

5. Hold the MODE button on the on-board control for 3 seconds to

enter the Installer Set-up Menu�

6. Navigate through the following screens to set up the dehumidifier

for the installed application�

Use the UP or DOWN arrows to select items and use MODE to

switch to the next set-up option� To exit installer set-up, all options

must be scrolled through using the MODE button�

7. After the installer set up options have been completed, DONE will

blink for 3 seconds and the control will return to the OFF screen�

90-1854

AIR SAMPLING

90-1854

Use the UP or DOWN button to

adjust how frequently the

dehumidifier samples the air to

determine whether or not to

dehumidify� Fewer minutes means

the dehumidifier will sample more

frequently to minimize humidity swings, but increases cost to operate

due to more frequent fan operation� Press MODE when done to move to

the next screen�

RH OFFSET

90-1854

An offset can be applied to the

on-board humidity reading to avoid

discrepancies with other humidity

measuring devices in the home� Use

the UP/DOWN arrows to select an

offset from -5% to 5%� Press MODE

to exit the installer set-up screens�

10 English

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

MODEL A77

CONTROL

R/+

C/-

90-2490

WIRING AND SET-UP

MODEL A77 CONTROL

The Model A77 will measure the relative humidity and turn the dehumidifier on and off to control the humidity level to the desired setting� The

humidity setting can be adjusted from the control, while the display allows easy access and monitoring of the humidity level in the space� It is

recommended that the Model A77 be mounted at/near canopy height� Shield the Model A77 from direct exposure to HPS or LPS lighting�

NOTE: Use 18-22 AWG wire for control wiring�

Humidity can be controlled using the internal dehumidifier control, a Model A77 control, or a different external control like a thermostat�

Installing an external control eliminates the need to run the dehumidifier blower for sampling, as the control is constantly measuring the humidity

close to the canopy� When the humidity level rises above the setting, the dehumidifier is turned on�

FIGURE 11 – MODEL A77 REMOTE CONTROL WIRING

TO INSTALL AND USE THE MODEL A77 CONTROL,

COMPLETE ALL STEPS:

1. Unplug the dehumidifier or turn off power to the circuit at the

breaker or fuse�

2. Run thermostat cable (use 18-22 AWG wire) from the Model A77 to

the control of the dehumidifier�

3. Trim about 1/4" of insulation from the end of the wires on each

end� Insert the wire into the terminals as shown in FIGURE 11�

4. Restore dehumidifier power�

TO SET THE DEHUMIDIFIER TO USE THE MODEL A77 CONTROL,

COMPLETE ALL STEPS:

1. With power to the dehumidifier, use the ON/OFF button to set the

dehumidifier to the OFF position�

NOTE: If the display backlight is not on, the first button press (any

button) will only turn the backlight on� Press the button a second

time to achieve the desired function�

2. Hold the MODE button on the on-board control for 3 seconds to

enter the Installer Set-up Menu�

3. The display should now read REMOTE on the left and DISABLED

on the right� Use the UP or DOWN arrow buttons to set this to

ENABLED�

90-1854

4. Once the display reads REMOTE ENABLED, press the MODE button

to cycle through the other settings until the display blinks DONE

for 3 seconds�

5. Use the ON/OFF button to turn the dehumidifier ON� The display

on your unit should read REMOTE�

6. Locate the Model A77 that you just set up� On the Model A77, press

the ON button and use the arrow buttons to set your preferred

%RH setpoint� When setting up in REMOTE mode for the first

time, your dehumidifier will wait 3 minutes before starting to

dehumidify, regardless of ambient conditions�

English 11

FLOAT DH DH

SWITCH

EXTERNAL

CONTROL

90-2542

ALTERNATIVE EXTERNAL CONTROL

Alternatively, use any other humidity control system as long as it has a dry contact, normally open output dedicated to controlling the dehumidifier�

Reference the installation literature provided with the alternative control for wiring, set-up, and operating details�

FIGURE 12 – ALTERNATIVE EXTERNAL CONTROL WIRING

TO INSTALL AND USE AN ALTERNATIVE EXTERNAL CONTROL,

COMPLETE ALL STEPS:

1. Unplug the dehumidifier or turn off power to the circuit at the

breaker or fuse�

2. Run thermostat cable (use 18-22 AWG wire) from the alternative

external control to the control of the dehumidifier�

3. Trim about 1/4" of insulation from the end of the wires on each

end� Insert the wire into the terminals as shown in FIGURE 12�

4. Restore dehumidifier power�

TO SET THE DEHUMIDIFIER TO USE THE ALTERNATIVE CONTROL,

COMPLETE ALL STEPS:

1. With power to the dehumidifier, use the ON/OFF button to set the

dehumidifier to the OFF position�

NOTE: If the display backlight is not on, the first button press (any

button) will only turn the backlight on� Press the button a second

time to achieve the desired function�

2. Hold the MODE button on the on-board control for 3 seconds to

enter the Installer Set-up Menu�

3. Press MODE again and the display should change to EXTERNAL in

the center, and DISABLED on the right� Use the UP or DOWN arrow

buttons to set this to ENABLED�

90-1854

4. Once the display reads EXTERNAL ENABLED, press the MODE

button to cycle through the other settings until the display blinks

DONE for 3 seconds�

5. Use the ON/OFF button to turn the dehumidifier ON� The display

on your unit should read EXTERNAL� Even if there is a demand for

dehumidification according to your external control, the dehumidifier

will wait 3 minutes before turning on for the first time only�

12 English

DAISY CHAIN WIRING

Anden dehumidifiers can be wired in a daisy chain application, allowing one Model A77 or alternate dry contact dehumidistat to control any number

of dehumidifiers wired together� Reference the dehumidifier Installation and Operation Manual for detailed set-up and operation�

MODEL A77 AS DRIVING CONTROL

When a Model A77 is used to control the first dehumidifier, Unit #1 must be set to REMOTE ENABLED in the set-up menu� All downstream units must

be set up to EXTERNAL ENABLED in each set-up menu� See pages 11 and 12 for set up details, and wire as shown in FIGURE 13�

SEQUENCE OF OPERATION

Each unit in the daisy chain responds to the first unit being controlled by the A77� When the humidity level rises above the humidity setting, all units

will dehumidify until the humidity measured by the A77 falls below the setting�

IMPORTANT: If the A77 or first dehumidifier experiences a fault or loses power, all downstream dehumidifiers will also stop function� If any

dehumidifier in the daisy chain other than Unit #1 experiences a fault, that unit will stop operation as determined by the fault but all other units will

continue operating� If any dehumidifier loses power, all downstream units will stop function�

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

R/+

C/-

Float

Switch

DHDH

Vent

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

Float

Switch

DHDH

Vent

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

Float

Switch

DHDH

Vent

DEH DEH DEH

UNIT #1

SET UP FOR REMOTE CONTROL

MODEL A77 CONTROL

UNIT #2

SET UP FOR EXTERNAL CONTROL

UNIT #3

SET UP FOR EXTERNAL CONTROL

90-2508

FIGURE 13 – WIRING WITH A77 CONTROL

English 13

ALTERNATE EXTERNAL DRY CONTACT CONTROL AS DRIVING CONTROL

When a dry contact control is used to control the first dehumidifier, Unit #1 must be set to EXTERNAL ENABLED in the set-up menu� All downstream

units must be set up to EXTERNAL ENABLED in each set-up menu� See page 12 for set up details and wire as shown in FIGURE 14�

SEQUENCE OF OPERATION

Each unit in the daisy chain responds to the first unit being controlled by the external control� When the humidity level rises above the humidity

setting, all units will dehumidify until the humidity measured by the external control falls below the setting�

IMPORTANT: If the external control experiences a fault, all downstream dehumidifiers will also stop function� If any dehumidifier experiences a fault,

that unit will stop operation as determined by the fault but all other units will continue operating� If any unit loses power, all downstream units will

stop function�

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

Float

Switch

DHDH

Vent

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

Float

Switch

DHDH

Vent

+ - A B ODT

SensorRemote

Gh Rf Cf Gs YW

HVAC EQUIP.

Float

Switch

DHDH

Vent

DEH DEH DEH

TO APRILAIRE 88XX SERIES CONTROL

OR OTHER EXTERNAL DRY CONTACT CONTROL

UNIT #1

SET UP FOR EXTERNAL CONTROL

UNIT #2

SET UP FOR EXTERNAL CONTROL

UNIT #3

SET UP FOR EXTERNAL CONTROL

90-2509

FIGURE 14 – WIRING WITH ALTERNATE EXTERNAL CONTROL

14 English

CODES (LOCATED ON BACK OF WIRE ACCESS COVER)

See the Installation Instructions for troubleshooting error codes� For additional

assistance, Technical Support is available Monday through Friday, 7:00a�m� to

5:00p�m� CST, at (800)972-3710�

Contact Technical Support before replacing the unit or components and for

additional troubleshooting.

ERROR CODE FAILURE MODE

E1 Internal %RH/Temperature Sensor Failure

E3 Model A77 Remote Control Communication Loss

E4 Insufficient Capacity

E5 High Temperature Thermistor Failure

E6 Low Temperature Thermistor Failure

E7 Float Switch Open

E8 Inlet Air Temperature Out of Range

English 15

TABLE 1 – DIAGNOSTIC CODES

Diagnostic

Code Failure Mode Action Reset

E1 Internal Humidity or

Temperature Sensor

Open or Shorted

1. If connection okay, replace User Interface, Part No� 71000062� Cycle Power

E3 Model A77

Remote Control

Communication Loss

1. Check connections between Model A77 and dehumidifier control board� Terminals should be fully

inserted and secured in the control board and Model A77 control terminals�

2. If connections are correct and secure, turn off the dehumidifier and remove the Model A77� Use a

short section of 4-wire cable to reconnect the Model A77 to the control board� Turn the dehumidifier

back on and increase the dryness level setting on the Model A77� If the dehumidifier turns on, the

problem is with the wiring between the dehumidifier and control�

3. If the dehumidifier does not turn on, call Technical Support�

Self-Correcting

E4 Insufficient Capacity 1. Check the frost sensor connection at the power board� Terminal should be fully seated on the power

board pins�

2. Remove the side access panel and verify that the sensor is secured to the suction line�

3. If the sensor is connected and secured to the refrigeration line proceed to the next step�

4. Reset the fault by cycling power to the dehumidifier�

5. Make sure the dehumidifier is not in EXTERNAL or REMOTE mode� For instruction, see pages 11 and

12 for WIRING AND SET-UP�

6. Turn the humidity setting down (below room/home humidity level) to make a dehumidification call�

7. Allow the fan and compressor to run for approximately 10-15 minutes and then enter diagnostic

test mode by simultaneously pressing the UP ARROW and MODE buttons for 3 seconds� (NOTE:

This action must be done at the user interface installed on the unit�) The LCD will display the

temperature measured by the internal sensor while also displaying AIR SAMPLING and ON, the

humidity measured by the internal sensor while also displaying %RH and ON, and the frost sensor

temperature while also displaying ON� Scroll through these values and by using the UP/DOWN arrow

buttons�

8. Record values and call Technical Support�

Cycle Power

E5 High Temperature

Thermistor Failure

1. Check the high temperature sensor connection at the power board� Terminal should be fully seated

on the power board pins�

2. Remove the side access panel and verify the sensor is not damaged and connected to the

refrigeration line coming from the compressor�

3. If the sensor is connected and secured to the refrigeration line, it may need to be replaced with Part

No� 71000035 – contact Technical Support to confirm�

Cycle Power

E6 Low Temperature

Thermistor Failure

1. Check the low temperature sensor connection at the power board�

2. Remove the side access panel and verify the sensor is not damaged and connected to the suction line�

3. If the sensor is connected and secured to the refrigeration line, it may need to be replaced with Part

No� 71000034 – contact Technical Support to confirm�

Self-Correcting

E7 Float Switch Open 1. Empty the condensate pan�

2. Check the float switch connection at the control board�

3. If not using a float switch, verify jumper is between float switch terminals on dehumidifier control board�

4. If the problem persists, replace the float switch�

Self-Correcting

E8 Inlet Air Temperature

Out of 50°F – 104°F

Range or Dew Point

Below 40°F

1. Verify all ductwork is properly sealed�

2. If no signs of leak points, contact Technical Support�

Self-Correcting

TROUBLESHOOTING

Technical Support is available Monday through Friday, 7:00 a�m� to 5:00 p�m� CST, at (800) 972-3710� Use the guides on the following pages to identify

and correct system faults� Contact Technical Support before replacing the unit or any components and for additional troubleshooting�

DIAGNOSTIC CODES

When an error occurs, the Diagnostic Code along with SERVICE REQUIRED will be displayed on the control

screen� If a 71000087 Alert Light is used, the light will turn on when an error occurs�

90-1854

16 English

TABLE 2 – TROUBLESHOOTING GUIDE

Symptom Possible Reason Troubleshooting Procedure

Dehumidifier does not

turn on/run�

No power to unit� • Check that the dehumidifier is plugged in�

• Check that the power switch is turned ON�

• Check that the control is turned ON�

• Check that the circuit breaker has not tripped�

Dehumidifier blower is

running but with little or

no airflow�

Pressure drop across

dehumidifier is too high�

• Check dehumidifier air filter and replace if necessary�

• Check for blocked duct work and clear�

Dehumidifier blower is

running but compressor

is not�

Float switch open� • If float switch installed, check connections at control board and empty condensate pan�

• If no float switch installed check that the jumper is installed at the float switch terminals on the control

board�

Coil frosting – defrost� • Lack of or reduced airflow� Check dehumidifier air filter and replace if necessary�

• Check for blocked duct work�

• Inlet air conditions below 60°F� Increase the humidity setting�

Inlet air temperature is

outside of the 50°F –

104°F range or the dew

point is below 40°F and

there is a demand for

dehumidification�

• Verify all ductwork is properly sealed�

Dehumidifier is not

draining properly�

Drain line blocked or unit

not level�

• Verify that the unit is level�

• Check the drain line blockages and for a continuous downward slope�

Dehumidifier is

producing hot air�

Normal function� • Air is reheated across the condenser coil, resulting in a temperature rise between inlet and outlet, this is

normal�

English 17

SERVICE PARTS

No. Part Description Part No.

1Transformer, 40VA, 240V (V1) 71000069

Transformer, 40VA, 277V (V3) 71000078

2Fuse, 1A, Slow-Blow 71000070

3Internal Power PCB 71000026

4Compressor Contactor 71000061

5Compressor Run Capacitor (45MFD, 370VAC) (V1) 71000037

Compressor Run Capacitor (60MFD, 370VAC) (V3) 71000079

6Fan Relay 71000072

7Fan Assembly 71000080

8Cord, SJT 12/3, 6-20P (V1) 71000081

Cord, SJT 12/3, L7-20P (V3) 71000082

9Filter, MERV 11 5813

No. Part Description Part No.

10 User Interface 71000062

11 Low Temperature Sensor 71000084

12 High Temperature Sensor 71000085

Not Shown

Digital Dehumidifier Control A77

P-Trap Kit 71000086

Fitting, 3/4" MNPT x 3/4" BARB, PVC 71000053

Drain Tubing, 3/4" ID x 10' L 71000063

Duct Kit 5807

Leveling Feet 5789

Alert Light 71000087

Hanging Bracket Kit 71000088

90-2440

18 English

LIMITED WARRANTY

Your Research Products Corporation Anden™ 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 online at anden.com to register your Anden product� If you do not have online access, please mail a postcard with your name, address, phone number, email address, product