Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
http://customer.honeywell.com
® U.S. Registered Trademark.
© 2015 Honeywell International Inc.
68-3087—04 M.S. Rev. 06-15
Printed in U.S.A.
Installation Recommendations and Options
Dedicated Return to Main Supply
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M33150
SEPARATE
RETURN
BACKDRAFT
DAMPER
(OPTIONAL)
GRAVITY DAMPER
A
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27324
BACKDRAFT
DAMPER
B
Main Return to Main Supply
TrueDRY
M33152
SEPARATE
RETURN
SUPPLY
D
Dedicated Return to Dedicated Supply
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27325
C
Main Return to Main Return
Ideal when…
• Access to a dedicated central return for
TrueDRY DR90 is available.
• Combined with A/C operation; requires
backdraft damper on the exhaust port to
minimize backdraft when TrueDRY DR90
is not on but A/C is.
• Providing dry air to a specific area with
an optional 20% open gravity damper on
TrueDRY DR90 supply.
Ideal when…
• Running TrueDRY DR90 when not
running A/C. Requires damper on the
exhaust port to minimize backdraft when
TrueDRY DR90 is not on but A/C is.
• Access to a dedicated central return for
TrueDRY DR90 is not available.
• System fan should run with dehumidifier
for best results.
Ideal when…
• TrueDRY DR90 will not be ducted to a
forced air HVAC system.
Ideal when…
• Running TrueDRY DR90 with A/C
operation.
• System fan must run with dehumidifier.
• Minimizing discharge air temperature
(DAT) increase is preferred.
• Access to a dedicated central return for
TrueDRY DR90 is not available.
1. Never operate a unit with a damaged power cord. If the power cord is damaged it must be replaced by the manufacturer, its
service agent, or similarly qualified person in order to avoid a hazard.
2. The appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or
lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by
a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
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