3/4" MNPT X 3/4" SLIP FIT
PVC RIGID PIPE
FLEXIBLE TUBE
CONSTANT DOWNWARD
SLOPE 1/8"/FT (MIN.)
3/4" MNPT X 3/4" SLIP FIT
PVC RIGID PIPE
FLEXIBLE TUBE
CONSTANT DOWNWARD
SLOPE 1/8"/FT (MIN.)
CONSTANT DOWNWARD
SLOPE 1/8"/FT (MIN.)
KEEP TOP OF
LOOP BELOW THE
BOTTOMOF THE
DEHUMIDIFIER
CABLE TIE
DRAIN TRAP
3/4" MNPT x 3/4"
BARB
3/4" FEMALE PIPE
x 3/4" FNPT
PRIME TRAP
3/4" MNPT x 3/4" BARB
3/4" MNPT x 3/4"
FEMALE PIPE
3/4" MNPT x 3/4"
FEMALE PIPE
FLEXIBLE TUBE
FLEXIBLE TUBE
PVC
RIGID PIPE DRAIN TRAP
DRAIN TRAP
CONSTANT DOWNWARD
SLOPE 1/8"/FT (MIN.)
KEEP TOP OF
LOOP BELOW THE
BOTTOMOF THE
DEHUMIDIFIER
CABLE TIE
DRAIN TRAP
3/4" MNPT x 3/4"
BARB
3/4" FEMALE PIPE
x 3/4" FNPT
PRIME TRAP
3/4" MNPT x 3/4" BARB
3/4" MNPT x 3/4"
FEMALE PIPE
3/4" MNPT x 3/4"
FEMALE PIPE
FLEXIBLE TUBE FLEXIBLE TUBE
PVC
RIGID PIPE DRAIN TRAP
CONSTANT DOWNWARD
SLOPE 1/8"/FT (MIN.)
KEEP TOP OF
BOTTOMOF THE
DEHUMIDIFIER
CABLE TIE
DRAIN TRAP
3/4" MNPT x 3/4"
BARB
3/4" FEMALE PIPE
x 3/4" FNPT
PRIME TRAP
3/4" MNPT x 3/4" BARB
3/4" MNPT x 3/4"
FEMALE PIPE
3/4" MNPT x 3/4"
FEMALE PIPE
FLEXIBLE TUBE
FLEXIBLE TUBE
PVC
RIGID PIPE DRAIN TRAP
DRAIN TRAP
+ - A B ODT
Sensor
Remote
Gh Rf Cf Gs YW
HVAC EQUIP.
DH
DH
R/+
C/-
B
A
MODEL A77 CONTROL
90-2479
90-2479
90-2479
90-2479
90-2479
90-2481
90-2480
5A. DRAIN CONNECTIONS – A210V1
5B. DRAIN CONNECTIONS – A320V1/V3
DO NOT DOUBLE TRAP
6. WIRING
• 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
©2019 Anden – A Quality brand from Research Products Corporation
10013947 B2208490A 4.19
7. SET-UP & SEQUENCE OF OPERATION WITH MODEL A77
1. Plug unit in and turn power switch to ON.
2. The on-board control screen should display OFF.
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.
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.
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.
5. Press MODE repeatedly until DONE shows on screen.
6. Press ON/OFF to turn ON.
ERROR CODE FAILURE MODE
E1 Internal %RH/ Temperature Sensor Failure
E2 High Refrigeration Pressure
E3 Model 76 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
12/3,6-20P
12/3,L7-20P
14/3,6-15P
