MODEL S77 – REMOTE CONTROL AND WIRING
NOTE:
Use 18-22 AWG wire for control wiring�
Humidity can be controlled using the internal dehumidifier control, a
Model S77 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 S77 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 S77 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 10
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 12�
6.
See
USING THE MODEL S77 OR EXTERNAL CONTROL
on page 13 for start up instructions�
The Model S77 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 S77 be mounted at/near canopy height� Shield the Model S77 from direct exposure to HPS or LPS lighting�
Press the ON button on the Model S77 to turn on the control� The UP/DOWN arrow buttons are used to set the desired humidity setting� At all other
times, the Model S77 will display the measured humidity level� Reference the Model S77 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 12� 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 S77 CONTROL
FLOA
T
DH
DH
SWITCH
EXTERNAL
CONTROL
FIGURE 10
– MODEL S77 REMOTE CONTROL WIRING
FIGURE 11
– ALTERNATE EXTERNAL CONTROL WIRING
English
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