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MODEL A77 – REMOTE CONTROL AND WIRING

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�

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 a 4-wire 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 5

 and tighten 

to secure�

4. 

Restore dehumidifier power� There is a delay of three minutes after 
restoring power before the dehumidifier will respond to the control� 

5. 

Set up the dehumidifier to 

ENABLE REMOTE

 control as shown on page 7�

6. 

See 

USING THE MODEL A77 OR EXTERNAL CONTROL

 on page 7 for start up instructions�

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�

Press the ON button on the Model A77 to turn on the control� The UP/DOWN arrow buttons are used to set the desired humidity setting� At all other 
times, the Model A77 will display the measured humidity level� Reference the Model A77 Installation and Operating Instructions for set-up�

ALTERNATE EXTERNAL CONTROLS

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

When using an external control, set up the dehumidifier to 

ENABLE 

EXTERNAL

 control as shown on page 7� Reference the installation 

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

+ - A B

ODT

Sensor

Remote

Gh
Rf
Cf

Gs

Y

W

HV

AC E

QUIP
.

DH

DH

R/+

C/-

B

A

MODEL A77 CONTROL

FLOA

T

DH

DH

SWITCH

EXTERNAL

CONTROL

90-1860

90-2542

FIGURE 5 

– MODEL A77 REMOTE CONTROL WIRING

FIGURE 6 

– ALTERNATE EXTERNAL CONTROL WIRING

6

Summary of Contents for A100F

Page 1: ...IER FOR INSTALLATION 3 LOCATION CONSIDERATIONS 3 DRAIN INSTALLATION 4 Leveling 5 Condensate Pan Condensate Pump and Float Switch 5 MODEL A77 REMOTE CONTROL AND WIRING 6 Alternate External Controls 6 S...

Page 2: ...property damage or injury Read instructions before installation service or maintenance 3 Do not use in pool applications Pool chemicals can damage the dehumidifier 4 Do not use solvents or cleaners on...

Page 3: ...emoval of the side panel shown Allow sufficient space for service on this side of the unit Always install the dehumidifier in a condensate pan when locating in or over a finished space CLIP OFF PLASTI...

Page 4: ...result in air lock NOTE PTFE thread seal tape is recommended for the threaded connection and hand tighten only If hard pipe is used PVC primer and cement is recommended for the slip fit connection Re...

Page 5: ...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 4 Overflow safety switche...

Page 6: ...rt up instructions 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...

Page 7: ...r for the installed application Use the UP or DOWN buttons 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...

Page 8: ...red 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...

Page 9: ...tting 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...

Page 10: ...r 3 seconds to clear the service message 90 1854 MAINTENANCE CLEAN OR REPLACE THE AIR FILTER After initial installation the air filter should be checked and cleaned every 6 months The CLEAN FILTER ser...

Page 11: ...p and gently lifting the cover up and out of the drain pan 6 Clean the drain insert with warm water and mild detergent solution REINSTALLING THE DRAIN INSERT 1 Reinstall the drain insert by inserting...

Page 12: ...ture while also displaying ON Scroll through these values and by using the UP DOWN arrow buttons 7 Record values and call Technical Support Cycle Power E5 High Temperature Thermistor Failure 1 Check t...

Page 13: ...s 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...

Page 14: ...Deh 5882 6 Fan 100pt Deh with 12MFD Capacitor 5886 7 Wire Harness Power Deh 5884 8 Sensor Low Temperature Deh 5455 No Part Description Part No 9 Sensor High Temperature Deh 5456 10 Capacitor Run 50 F...

Page 15: ...IABILITY 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 EXCLU...

Page 16: ...anden com P O Box 1467 Madison WI 53701 1467 800 972 3710 F 608 257 4357 Printed in USA 2021 Anden A Quality brand from Research Products Corporation 10015567 B2209250A 1 21...

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