CAuTIOn: low voltage hazard.
Can cause equipment damage.
Disconnect hVAC equipment before beginning installation.
Wire the TrueDRY DR90 according to the diagram that applies to your desired opera-
Follow this diagram if using the
TrueDry DR90 Dehumidification System
NOTE: THERMOSTAT MUST BE CONFIGURED TO DRIVE FURNACE FAN
DURING DEHUMIDIFICATION CALL.
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
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.)
DHUM R FAN C