CSZ EZT-570i, Техническое руководство

Страница: 76 / 95

EZT-570i Technical Manual
76
8.5 Refrigeration Options
The “Refrigeration Options” screen is accessed from the “Chamber” menu. This screen is used to
define what type of refrigeration system the chamber has and how the EZT-570i is to control it.
Figure 8-9 Refrigeration Options
The
Advanced button provides access to additional refrigeration system settings used with Rate
Master, Tandem, Redundant and Tundra II systems.
You must press the “Set” button to save changes to the refrigeration and/or defrost type
selections. Be sure to press the “Set” button prior to switching to another configuration
screen or any change to the refrigeration and/or defrost type will not be saved.
Parameter Descriptions
Refrig Type: Sets the type of refrigeration system installed on the chamber (can no
refrigeration). Base selections include:
Single Stage: selection for standard single stage systems (typically R404a)
Tundra: selection for single stage systems using R410a
Cascade: selection for standard cascade systems
Rate Master: selection for cascade systems with system 1 cooling mode ability
In addition to the base selections, there are two other selections provides for the
single stage, tundra and cascade options. These are the “tandem” and
“redundant” modes.
Tandem: Selection for dual refrigeration (single stage, Tundra or cascade)
in which both systems operate together to provide cooling.
Typically used on large chambers or when high heat loads are
generated by product under test.
Redundant:
Selection for dual refrigeration (single stage, Tundra or cascade)
in which only one system operates at a time. If the operating
system faults out, the other system will take over. Provided with
time share setting son the “Advanced” refrigeration options page,
the systems will alternate back and forth to share equal run time.