Install to Fit Your Application
TrueDry DR90 Dehumidification System 69-2407—01
5
Flex duct is recommended in connecting to the TrueDRY DR90 collars to reduce vibration noise.
M24745
Electrical requirements:
115 VAC outlet. Ground fault
interrupter (GFI) recommended.
Duct sizing:
Use minimum 10-in. diameter round for
duct lengths up to 25 ft. Minimum 12-in. required for
lengths longer than 25 ft. Duct branches from the
main inlet/exhaust should be minimum 10-in. round
for 2-3 branches, and 12-in. round or larger for 4
branches or more.
For the optional fresh air ventilator port, use 6-in.
round, insulated duct for lengths up to 50 ft.
Use 8-in. round duct for more than 50 ft. of if more
than 100 CFM is required.
Isolated Areas:
Effective dehumidification may require
ducting to isolated or stagnant air flow areas.
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27325
A
Main Return to Main Return
Ideal when…
• Running TrueDRY DR90 with A/C
operation.
• Minimizing discharge air temperature
(DAT) increase is preferred.
• Space dictates.
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27324
BACKDRAFT
DAMPER
B
Main Return to Main supply
Ideal when…
• Running TrueDRY DR90 opposite A/C
operation. Running with A/C operation
requires damper on the exhaust port
to minimize backdraft when TrueDRY
DR90 is not on but A/C is.
• Space dictates.
