4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472
URL:
www.iscenclosurecooling.com
● Email:
SP-ENG-210-100-09 Rev 1.6
6
|
P a g e
Operation
DELTA-T air conditioners will lower (or increase as necessary) the temperature inside an enclosure to
ensure its proper operational temperature. Our air conditioners, when sized properly, will provide
cooling or heating automatically controlled by the temperature digital controller.
DELTA-T
air conditioners operate as a “closed loop” system with no exposure or introduction of
outside air. This insures that the enclosure is separated from and is not contaminated with ambient
air, dirt, chemicals, dust, moisture or foreign matter so that sensitive enclosure components are
protected and are kept at your required operational temperature.
An air conditioner is designed to dehumidify and extract heat from an area, or provide heat to an area.
The cooling is done using a simple refrigeration cycle. A product of this simple refrigeration cycle is
excess humidity that condenses to a liquid.
DELTA-T air conditioners are designed using an advanced refrigeration cycle and are equipped with a
Condensate Removal System that changes the excess humidity liquid into a vapor which is then
vented to the atmosphere. In the event of excess water vapor where the enclosure door has been left
open there is an overflow hole on the bottom of every unit. Please contact ISC Inc. if you encounter
excess water coming from your air conditioner.
Preliminary Testing
Before mounting the air conditioner to the enclosure, test for proper operation. Follow the steps below
prior to installation.
WARNINGS
The air conditioner must sit upright for 24 hours to assure the compressor oil has drained down to the
compressor. Check the unit label to assure the electric power available to the air conditioner is the
proper voltage and phase. Check the electric power source for proper ground wire and neutral wire
installation per 2008 NEC. Assure that the electric power is protected by a circuit protection device;
refer to the Unit Specification section in this manual for proper circuit protection sizing.
Plug the unit’s power cord into your source to start the evaporator fan and, if desired, change
the set point. Refer to Digital Temperature Controller Programming section on this manual for
details on changing the set point. Factory default settings should be satisfactory; however you
may want to adjust heat, cooling and alarm set points for your specific application.
The condenser fan is controlled by the refrigerant high heat pressure and will turn on later
when the operating pressure builds up. This feature allows low ambient operation and
reduces current inrush at initial power on.
