background image

3/4" MNPT X 3/4" FEMALE PIPE 
(INCLUDED)

P-TRAP
(INCLUDED)

3/4" MNPT X 3/4" FEMALE PIPE 
(INCLUDED)

P-TRAP
(INCLUDED)

3/4" PIPE X 3/4" PIPE COUPLING
(NOT INCLUDED)

PVC HARD PIPE
(NOT INCLUDED)

3/4" PIPE TEE

(INCLUDED)

3/4" FEMALE PIPE X 3/4" FNPT
(INCLUDED)

3/4" MNPT X 3/4" BARB (INCLUDED)

3/4" FLEXIBLE TUBE
(NOT INCLUDED)

HIGHER

THAN

FILTER

FRAME

OPTIONAL

VACUUM

BREAK

+ - A B ODT

Sensor

Remote

Gh
Rf
Cf
Gs

Y

W

HV

AC E

QUIP
.

DH

DH

R/+

C/-

B

A

MODEL A77 CONTROL

90-2534

90-2481
90-2553

5. DRAIN CONNECTION

6. WIRING 

NOTES:

•  Mount control at canopy height.

•  Do not mount in direct path of 

dehumidifier outlet air.

•  Shield control from lights.

anden.com 

P.O. Box 1467 
Madison, WI 53701-1467 
800.972.3710  F: 608.257.4357 
Printed in USA
©2020 

Anden – A Quality brand from Research Products Corporation

10015129 B2209017A 10.20

8. 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

E9

Fan or Compressor Fault

IMPORTANT NOTES:

•  Do not double trap.

•  Prime drain trap when installation is complete.

•  Drain line must maintain a constant downward slope.

•  Support the drain lines to prevent dips or sags.

•  Do not submerge the end of the drain line in water to avoid microbial growth.

•  Vacuum break is recommended when using a condensate pump or when 

connecting multiple drain lines.

A710V1

L6-30P

A710V3

L7-30P

7. SET-UP & SEQUENCE OF OPERATION WITH MODEL A77  

(REFER TO THE INSTALLATION MANUAL FOR SET UP AND WIRING OF ANY OTHER CONTROL)

1. 

Plug unit in and turn power switch to ON.

2. 

The on-board control screen should display OFF.

90-1854

NOTE:

 The first button press will only turn on the 

backlight. 

3. 

Hold the MODE button on the on-board control 
for 3 seconds to enter the Installer Set-up Menu.

90-1854

SEQUENCE OF OPERATION

1. 

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

2. 

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

3. 

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 and ON will blink on the Model A77 to 
show that there is a call for dehumidification. The dehumidifier will turn off when the RH measured by the 
Model A77 drops 3% RH below the setting.

NOTE:

 When using the Model A77, there is an initial 3 minute delay at power-up before the dehumidifier 

compressor will turn on.

4. 

Press the UP or DOWN button to change 
to ENABLED.

90-1854

5. 

Press MODE repeatedly until DONE shows 
on screen.

90-1854

6. 

Press ON/OFF to turn ON.

90-1854

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