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
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Options
The RZ-01A & RZ-01V Series Air Conditioners may be ordered with the following options. Review the
list below for the specifications and functions of the option(s) that apply to your unit.
Low Ambient
This option consists of circuitry to protect the compressor in a low ambient temperature environment.
The low ambient package is designed to provide an optimum constant low current in the compressor
motor during the non cooling state. This option provides internal heat to the compressor to protect it
from stalls and hard starts during long periods of compressor off state.
Dry Contact
This option provides an early warning capability to your enclosure to aid in the protection of your
expensive equipment. The Dry Contact is programmed with an individual dry contact set point to
monitor the enclosure temperature limit that you require. When the enclosure temperature has
exceeded the maximum limit, the Form C gold plated contact will activate to notify you that there is a
problem in achieving your cooling set point.
Default Settings:
105°F Dry Contact High Temperature Alarm Set Point
2°F Recovery Differential
3min Temperature Alarm Delay
At the default settings the Dry Contact initial conditions are normally open and/or normally closed.
When the unit is powered on and the temperature exceeds 105°F for a period longer than 3 minutes
the Dry Contact will activate. At this time the normally open contact will close and the normally closed
contact will open. This state will remain until the temperature has decreased to 103°F.
Note:
The dry contact is not a power status indicator, rather a high temperature alarm alerting you that
the unit is unable to meet the cooling set point.
Refer to Advanced Digital Temperature Controller Programming section on page 8 for details on
changing these parameters.
