Bottom Condensate Drain Connection(s)
Note: Units with the SmartSaver® heat-recovery option may have more than one condensate drain.
Allow a minimum 12-inch clearance for the bottom drain connection. On horizontal units, a P-trap must be installed and
filled with water to prevent air from entering the unit (which is under negative pressure) and to assure proper drainage of
the condensate. Failure to do so will cause the drain pan to overflow.
On vertical units, the internal P-trap is factory-installed.
Use schedule 40 PVC or standard ABS plastic drainage pipe and slope the condensate drain line in the direction of flow
at least 1/4 inch per foot (0.2cm/m). The drain line must discharge through an air gap to a vented non-freezing point.
When a unit is used in a natatorium, Dectron recommends that the condensate be returned to the swimming pool if
local laws permit. Independent tests have shown that condensate from a DRY-O-TRON® unit is safe (these reports are
available from Dectron). The amount of water returned to the pool over an entire year is approximately equal to the entire
swimming pool water volume!
The ideal way to return the condensate to the pool water system is gravity drainage to the nearest skimmer or surge tank
(if so equipped). If the unit is located below the pool water surface 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 personnel of a problem with condensate removal.
DECTRON
Dectron, Inc. March 2012
DSH/DSV/RSH/DBH/RBH Series Dehumidifier Owner’s Manual
Data subject to change without notice.
60
Lifting and Locating Air Handler Underside Piping
Underside Pipe Chases
Some units may have pipe chases in the base
of the unit. These chases may be intended to
enclose conduits, heating-water pipes, steam
pipes, etc.
In this case, locate the chase and arrange any
required connections before setting the unit.
IMPORTANT: Use the included chase cap to
assist in sealing any pipe chases. Air must not
be allowed to move through a chase.
IMPORTANT: In some cases, pipes chases may
be subject to fire-stopping requirements.
Consult applicable codes.
STRAINER 1 1/2" SINK TYPE
DRAIN PAN
INSULATION
INSULATION
P-TRAP
(BY OTHERS)
ENCLOSURE BASE
Horizontal units only
(vertical-unit P-traps
are internal)
If a condensate pump is used, it must
have sufficient pump head to overcome
vertical lift, check valve cracking
pressure, 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 installed in the
condensate pump discharge line, with
the valve only opening during pump
operation. Do not connect the
condensate drain to a pipe with
negative pressure.
SAMPLE ONLY
Where pipe chases
are present, their
location may vary.
LIFTING AND
LOCATING
ALLOW
MINIMUM 12 IN
CLEARANCE
Risk of leaking water. Can cause property damage.
This product requires a free-flowing drain. Freezing or other abnormal conditions could
cause leakage or overflow. Do not locate this product above any equipment that could
be damaged by water.
NOTICE
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