+ - A B
ODT
Sensor
Remote
Gh
Rf
Cf
Gs
Y
W
HV
AC E
QUIP
.
MODEL A77
CONTROL
DH
DH
R/+
C/-
B
A
90-2490
90-2553
6A. 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.
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 the
MODEL A77
REMOTE CONTROL WIRING
diagram below.
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.
A710V1
L6-30P
A710V3
L7-30P
3
