Owners Manual DA2 Series Dehumidifier
Installation
Dectron, Inc. November 2009 9
Data subject to change without notice.
DECTRON
Minimum Service Access
a
ft (m)
1 2 3 4 5
DA2-007 - DA2-024 2 (0.6) 3
b
(1) 2 (0.6) 3 (1) 4 (1.2)
DA2-035 - DA2-070 3 (1) 3
b
(1) 3 (1) 3 (1) 4 (1.2)
a - access doors must be able to open to at least 90°.
b - (Canada) 1 meter
(USA) 3 ft for 230V, 3.5 ft for 460V units or per NEC
exhibit 110-26, whichever is greater.
4
2
3 ft. (1m)
3
1
5
Minimum clearances are required. See table below.
Sound and Vibration Elimination
Install anti-vibration springs or pads
such as machinery cork, rubber pads
or other approved isolation materials to
isolate the unit from the supporting
structure.
IMPORTANT!
Do not mount the unit on a ply-
wood sheet or any other material
that will resonate.
Install flexible duct to all duct connec-
tions of the unit to prevent sound and
vibration transmission. Use aerofoil-
type turning vanes on all elbows.
Elbows and acoustic insulation can be
used to further reduce noise where
necessary. See
Installation - Unit-
Duct Connections
.
Condensate Drain Connection
Some units may have bottom con-
densate drains connections. In this
case allow a minimum 12-inch clear-
ance for the bottom drain connection.
Some units may have side drains.
DA2 Series units have internal P-
traps and do not require others. Do
not install other P-traps without
consulting Dectron. Be sure to fill the
P-trap before starting the unit. Failure
to fill the P-trap will result in
condensate overflow.
Use schedule 40 PVC or standard
ABS plastic drainage pipe and slope
the condensate drain line at least 1/4
inch per foot. The drain line must dis-
charge through an air gap to a vented
open pipe.
If the unit is located below the drain
level a condensate pump is required
(available from Dectron with rated
maximum pump head of 9 feet and
shut-off pressure of 13 feet -- if higher
lift is required a more powerful pump
must be supplied by others). The
Dectron condensate pump and tank
comes complete with a high-level limit-
switch which must be connected to an
alarm. The alarm should notify person-
nel of a problem with condensate
removal.
If a condensate pump is used, it must
have sufficient pump head to over-
come vertical lift and water pressure if
pumped into a pressurized pipeline.
When connecting to a pressurized
pipeline, a check valve and normally-
closed solenoid valve should be uti-
lized in the condensate pump dis-
charge line, with the valve only open-
ing during pump operation. Do not
connect the condensate drain to a
pipe with negative pressure.
Air filters and blower belts require regular maintenance. Should it become necessary, major-
component replacement may require some minimum working clearance.
If the air handler unit is located overhead, then:
1. Adequate and safe service and maintenance access must be provided.
2. A mezzanine floor must be constructed to allow the minimum service
access.
3. Where the units are mounted above the floor level, adequate fall-protection rails
should be provided.
4. Minimum straight lengths of duct may be required. See Installation - Ducting.
5. Provision must be made for disposal of condensate.
NOTICE
Safety switches, safety valves, fall protection, pipes, conduits, etc., are not shown here.
This diagram is for illustration only, and is not suitable for any particular purpose. A
qualified structural engineer should design any support system, including fall protection.
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