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Terminal Description
CAUTION: Low voltage hazard.
Can cause equipment damage.
Disconnect HVAC equipment before beginning installation.
Wiring
Wire the TrueDRY DR90-AP according to the diagram that applies to your desired
operation.
Follow this diagram for
ducted operation with an
external humidity control.
T
u r
e
D
y r
D
R
9
0
A -
P
D
e
h
u
m
i d i
c i f
HVAC
R
C
R
Rc
THERMOSTAT
t a
o i
n
S
s y
e t
m
5
0
0
7
7
4
7
0
0 -
0
1
*
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 six terminals for the terminal block (reading from
left to right in the photo) are:
FLOAT: External low voltage float switch or water
sensor (two terminals). Use normally
closed switch.
DHUM: Compressor and fan operation for
dehumidification
R: DR90-AP 24V output
FAN: Fan activation only for ventilation
C: DR90-AP 24V output
External 24V devices can be powered from R and C
terminals (20VA max.).
G
Y
W
DPDT RELAY,
2.6A
G
Y
W
FLOAT FLOAT
DHUM
R
TrueDRY
MECHANICAL
DEHUMIDISTAT
DRY
CONTACTS
FAN
C
M29840A
26
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