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Terminal Description
* NOTE: The outer screws on the terminal block
secure the block to the chassis. They are not
used for wiring.
A wiring terminal block is located on the side
panel of the TrueDRY unit.
The four terminals for the terminal block (reading
from left to right in the photo) are:
DHUM: Compressor and fan operation for
dehumidification
R: DR90 24V output
FAN: Fan activation only for ventilation
C: DR90 24V output
External 24V devices can be powered from R and
C terminals (20VA max.)
Wiring
Wire the TrueDRY DR90 according to the diagram that applies to your desired opera-
tion.
TrueDry DR90 Dehumidication System 69-2407—01 7
TrueDRY
HVAC
THERMOSTAT
GYWR C
M29839
DHUM
+
+
R
FAN
C
C
Rc
R
H
H
DH
DH
W
W2
Y
Y2
G
K
NOTE: THERMOSTAT MUST BE CONFIGURED TO DRIVE FURNACE FAN
DURING DEHUMIDIFICATION CALL.
Follow this diagram if using the
Prestige™ thermostat.
CAUTION: Low voltage hazard.
Can cause equipment damage.
Disconnect HVAC equipment before beginning installation.