4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472
SP-ENG-210-100-06 Rev 1.9 12 |
P a g e
Options
The RZ-02A, RZ-03A, & RZ-04ASeries 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.
High Temperature Alarm
This option provides an early warning capability to your enclosure to aid in the protection of your
expensive equipment. The High Temperature Alarm is programmed with a contact set point to monitor
the enclosure temperature limit that you require. When the enclosure temperature has exceeded the
maximum limit, the 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 contact initial condition is normally open. When the unit is powered on and
the temperature exceeds 105°F for a period longer than 3 minutes the contact will activate. At this time
the normally open contact will close. This state will remain until the temperature has decreased to
103°F.
Refer to Advanced Digital Temperature Controller Programming section on page 14 for details on
changing these parameters.
Celsius Programming
Celsius Programming option allows the user to control the DELTA-T Air Conditioner in SI units. This
feature can be programmed into the digital temperature controller at time of manufacturing.
External Heat Output
This option allows you to add an external heater to be located anywhere in your enclosure. These
external heaters are ideal for focusing on individual sections of the enclosure without having a large
capacity Built-in Heater.
External Heater capacities available are 100 Watt, 150 Watt, 200 Watt, 250 Watt, 300 Watt,
400 Watt, 550 Watt, 650 Watt & 950 Watt
Default Settings:
55°F Heat Set Point
3°F Differential
