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The ULC Series internal blower will automatically turn off when either of the two exterior doors are opened. When one of the two
exterior doors is opened, the LCD screen displays a warning icon, along with a yellow light indicator on the light bar located in the
top middle of both doors. Should the door remain open for too long (user adjustable setting from 5 to 300 sec.), the display
changes from a "Warning" to the "Alarm" condition, and the color of the light bar will change from yellow to red. There is also an
audible alarm to notify the user of an alarm condition. Additional warning and alarm status items can be found in the Alarms
section of this manual.
The blower circulates air flow throughout the chamber. Should the temperature deviate more than +3°C from the set point (this
value is adjustable to 0 to 40°C), the controller is designed to start both refrigeration systems automatically in order to reach and
maintain the control set point temperature.
Alarms
The ULC Series is supplied with remote alarm signaling dry contacts (non-powered). Connections are made to a terminal strip
located on the right side of the unit near the top. Each pair of contacts is electrically isolated from the other contacts.
Figure 1: Remote Alarm
There are two sets of dry contacts, as shown in Figure 2. One set activates when either door is open, and the other activates for
any alarm condition. Both sets of contacts are normally open when the chamber is powered off. More details are provided in the
Terminal Positions and Descriptions table.
06
ULC SERIES INSTRUCTION MANUAL
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