EconoPurge Option
Units equipped with the Purge option may also be
equipped to maximize energy conservation with a
variation of economizer or Intelligent Energy Saver
options.
If the unit is equipped with an outdoor-air temperature
sensor, the Purge mode described above may also
operate automatically during periods when the outdoor
air is cool enough to control room temperature by
ventilation alone. This mode is one of the
economizer options.
If the unit is equipped with both outdoor-air
temperature sensor and an outdoor-air humidity
sensor, then the Purge mode described above may
also operate automatically when the outdoor air is cool
and dry enough to control room temperature and/or rel-
ative humidity by ventilation alone. This mode is one of
the the Intelligent Energy Saver options.
The outdoor-air intake damper(s) must be adjusted
mechanically to limit the intake flow to maintain a slight
negative pressure on the room.
Dectron, Inc. March 2012
DSH/DSV/RSH/DBH/RBH Series Dehumidifier Owner’s Manual
Product Description Major Airflow Options
Data subject to change without notice.
12
DECTRON
Normal operation
Purge Mode
DRY-O-TRON
®
with
Purge Option
Superchlorination of a pool may produce
gases and odors that preclude the presence
of swimmers in the natatorium. Purge mode
may be controlled manually to minimize the
time in which people must be out of the
natatorium during superchlorination.
On receipt of a manual input from the
operator,
1. the refrigeration system is stopped,
2. the supply blower continues to run,
3. the evaporator face dampers close,
4. the evaporator bypass damper closes,
5.
the outdoor-air damper opens completely,
6. the dampers for blower EF2 open, and
7. EF2 (the larger exhaust blower) runs.
Under normal conditions, half the return
air passes through the evaporator while the
other half passes through the bypass.
Under normal (not Purge) mode the
outdoor-air intake flow rate can be up to
15% (or up to 35% with air-conditioning
option) of the total supply airflow rate,
depending on outdoor temperature.
Except in Purge mode, the incoming outdoor
air must be heated to not less than
32°F (0°C). Theremay be limitations on
maximum flow rates. See subsequent page
in this manual.
Natatoriums with DRY-O-TRON
®
units
having the Economizer option must also
have auxiliary pool heaters, which may be
by others.
For more information, refer to
Appendix M6 - Purge
.
DESCRIPTION
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