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INTRODUCTION
The FARRAR™ ULC (Ultra-Low Chamber) Series addresses a major shift in the biopharma industry. Manufacturers of these
products want to make and distribute biological and tissue donor samples and materials as fast as possible for process intensifi-
cation and high yields. FARRAR wants to limit handling steps and on-site storage, as well as streamline freezing and cold storage
to avoid bottlenecks (reducing the time to reach temperature set point after opening doors). Additionally, FARRAR wants its
freezers to have the flexibility to meet changing set points and be easy to maintain.
The FARRAR ULC Series meets these requirements. These units are forced-air, low-temperature, long-term storage freezers with
built-in redundancy. Interior chamber temperatures are maintained between +2°C to +8°C and -20°C to -80°C. The ULC Series
chamber consists of two redundant cascade refrigeration systems. There are two condensers, two evaporators, and a total of
four compressors.
There are six models based on cu. ft. of storage:
North American Markets
ULC-190
ULC-259
ULC-311
International Markets
ULC-190i
ULC-259i
ULC-311i
The ULC Series has a wide range of storage and customizable material handling capabilities. The energy-efficient design offers
improved sustainability and helps lower operating costs. The ULC-190 recently earned its ENERGY STAR® certification. It also
offers best-in-class density, which reduces the amount of storage/warehouse space required. Good Manufacturing Practices
(GMP) requirements are maintained across all models without sacrificing performance.
Features
FARRAR ULC Series freezers consist of:
Dual refrigeration systems
Blower
Control system
The user can adjust various settings to suit their specific requirements. These are described in the Operation section of this
manual.
Refrigeration System
Each refrigeration system consists of:
Compressors (move heat)
Evaporator (absorbs heat)
Condenser (rejects heat)
Interstage heat exchanger (transfers heat between stage 1 and stage 2)
Circulating blower (produces air flow)
Pulse width modulation (PWM) valve (controls refrigerant flow)
These components are packaged as one unit. Both systems are located on top of the chamber. Each refrigeration system has its
own electrical power supply and power cord. There are also two LCD controllers (one mounted on each of the exterior doors).
There are two refrigeration systems. When one runs the defrost cycle, the other maintains the freezer temperature. Both refriger-
ation systems work in tandem after the doors are opened to help maintain set points. Therefore, additional cooling capacity is
available when needed, and energy consumption is reduced when at the steady state.
ULC SERIES INSTRUCTION MANUAL
04
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