DriSteem RL-3 - Wiring and Setup of the D77 Controller

42
DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
+ - A B ODT
SensorRemote
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HVAC EQUIP.
MODEL D77
CONTROL
DH
DH
R/+
C/-
B
A
90-2490
Wiring and setup of the D77 controller
The Model D77 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. Shield the Model D77 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
D77 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. When the
humidity level rises above the setting, the dehumidifier is turned on. With
internal control, the sampling rate can be set to 15,30,45, or 60 minutes.
TO INSTALL AND USE THE MODEL D77 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 D77 to the
control of the dehumidifier.
3. Trim about 1/4" (6 mm) of insulation from the end of the wires on each
end. Insert the wire into the terminals as shown in Figure 42-1.
4. Restore dehumidifier power.
FIGURE 42-1: MODEL D77 REMOTE CONTROL WIRING
INSTALLATION