ULTRA-LOW HIGHVOL FREEZERS

LOW TEMP CHEST (LTC)Multiple reach-in -75º C. / -103º F. chest freezers designed to share a central cascade system. Volumes typically to 80 cubic feet. Ideal for small vials, plates, pharmaceutical archival storage, long term product banking, and argon blanketed product storage. Chest design offers frequent door openings with minimal temperature disturbance.

Maximum capacity, multi-temperature and storage flexibility, and product protection are essential design elements avail-able in the most unique cascade freezers on the market today. Environmental Specialties offers a new solution to the antiquated ‘freezer farm’ approach which uses individual freezers with single, common refrigeration systems to store large volumes of prod-uct. Finally, a solution better than “just adding one more freezer”….

LOW TEMP UPRIGHT (LTU)Multiple reach-in -75º C. / -103º F. upright freezers designed to share a cen-tral cascade system. Volumes typically to 80 cubic feet. Ideal for small to medium product loads similar to those listed for the LTC line. Upright design offers front door loading and a reduced footprint.

LOW TEMP WALK-IN (LTW)Multi-door or truck-in -75º C. / -103º F. vaults designed

to share a central cascade refrigeration system. Vaults are located within -20º C. or 4º C. storage spaces. Ideal for large product containers, bulk drums, and can-

isters. Chamber within a chamber design offers multi-temperature storage for a wide variety of products.

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ELECTRICAL / CONTROL SYSTEM• A grey enamel, or optional NEMA 4X stainless steel enclosure, contains all branch

power, switching, and control circuits. This panel serves multiple freezers from a single central control location.

• The front features a heavy-duty insert section with Lexan door and key lock. The controls, recorder (if purchased), and non-fade labeling can withstand light spray down.

• The panel is third party listed to UL standards. NEC code is strictly followed for internal and external panel wiring.

• Temperature is controlled by a high accuracy, digital PID controller. This type of control-ler allows for close temperature control through proportional-integral-derivative algo-rithms (not on-off control).

• Alarm settings, solenoid actions, system auto-switching, mechanical enabling, and other various parameters are controlled through the proprietary ES microprocessor board.

• Alarms are indicated by solid-state LED’s and other highly visible panel-mounted indicators; audible alarms are also standard. Dry contact outputs are standard for temperature alarm limits, and may be provided, by request, for other indications.

MECHANICAL SYSTEM• Mechanical refrigeration ‘skids’ serves multiple freezer vaults inside walk-

ins, or multiple upright reach-in / chest style freezers.• Refrigeration skids are designed to be compact, yet offer generous service spac-

ing. Strategic thermocouple locations (and display panel) allow for temperature readings important for servicing.

• Copeland scroll compressors offers a multitude of advantages over reciprocating compressors: lower energy usage (high COP), fewer moving parts, fewer wear and stress points, lower noise, lower vibration, physically smaller, and higher coefficients of performance. The scroll systems use non-CFC refrigerants.

• Super-high efficiency oil separators remove 99.9% of circulating oil; oil removal is essential for trouble-free compressor operation.

• Thermostatic expansion valves allow precise metering of refrigerant.• Dual, identical mechanical systems alternate regularly for even wear, and auto-

matically switch systems based on detected system fault. Product protection is essentially guaranteed with redundancy.

SPECIAL OPTIONS• (all models) Custom designed horizontal or vertical storage systems allow quick and

easy access to various product types.• (LTW line) A dry air purge option can be provided for dewpoint depression and frost mini-

mization. This can be provided with a dewpoint monitor for constant readout of dry air moisture level.

• (LTW line) An LN2 option provides backup cooling in the event of mechanical system power failure. This is a popular option that provides liquid nitrogen cooling to bare tube coils; the injection valve and controls operate from a battery back-up unit.

• (all models) Inner doors may be provided on all chamber designs. This allows lid or door opening without air disturbance of the entire chamber volume. Size and number is specified by customer, and based on loading / unloading requirements.

Environmental Specialties is devoted to insuring you are completely satisfied with your ultra-low chamber purchase. Your questions are important, and we welcome an opportunity to speak with you about specific interests and low temperature storage requirements. Call us today and a Sales Associ-ate will be glad to assist you!

1-800-688-5859

A Division of the Zellweger Luwa Group

Environmental Specialties

4412 Tryon Road, Raleigh, NC 27606(919) 829-9300 • Sales Fax: (919) 833-9476

www.luwausa.com • E-mail: esi@luwausa.com

WALK-IN CHAMBERS • REACH-IN CHAMBERS • ULTRA-LOW FREEZERS • SERVICE AND VALIDATION

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