Install To Fit Your Application; Electrical Requirements - Honeywell DR90A3000 Guide D'installation

Install to Fit Your Application

Flex duct is recommended in connecting to the DR90/DR120A3000 collars to reduce vibration noise.
Dedicated Return to Main Supply
A
RETURN
SEPARATE
RETURN
Main Return to Main Supply
B
RETURN
6
DR120
DR90
MCR36852
AIR HANDLER
SUPPLY
DEHUMIDIFIER
(OPTIONAL)
GRAVITY DAMPER
BACKDRAFT
DAMPER
AIR HANDLER
SUPPLY
DEHUMIDIFIER
BACKDRAFT
DAMPER
Duct Sizing: Use minimum 10" diameter round for
duct lengths up to 25' Minimum 12" required for
lengths longer than 25' Duct branches from the main
inlet/exhaust should be minimum 10" round for 2-3
branches, and 12" round or larger for 4 branches or
more.
For the optional fresh air ventilator port, use 6" round,
insulated duct for lengths up to 50'
Use 8" round duct for more than 50' of if more than
100 CFM is required.
Isolated Areas: Effective dehumidification may
require ducting to isolated or stagnant air flow areas.

Electrical requirements:

115 VAC outlet. Ground fault
interrupter (GFI) recommended.
Ideal when...
• Access to dedicated central return for
dehumidifier is available.
• Requires backdraft damper on the
exhaust port to minimize backdraft
when dehumidifier is not on but A/C is.
• (optional) Duct humidifier supply with
20% open gravity damper to provide
M36843
dry air to a specific area
Ideal when...
• Running dehumidifier when not
running A/C.
• Requires damper on the exhaust port
to minimize backdraft when DR90/
DR120A3000 is not on but A/C is.
• Access to a dedicated central return is
not possible.
M36844
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
M24745