The Nuovair NA T1 SC is a professional blast chiller designed for the rapid cooling and freezing of food products. It is intended for use by qualified personnel in commercial environments. The machine operates automatically once a cycle is selected, requiring operator presence primarily for loading and unloading. After a cycle, it switches to a product maintenance/preservation phase, maintaining a predetermined cabinet temperature.
Technical Specifications:
The identification label (page 23) provides key technical data:
- Model: NA T1 SC
- Serial Number: MSC2007001
- Supply Voltage: 208 V 3PH 60 Hz
- Max Current: (not specified, but a field exists)
- Rating (BCSC/MCA/MOP): (fields exist, values not specified)
- Compressor Type: 4FES-3Y UL
- Refrigerant Type: R449a
- Quantity of Refrigerant: 5.5 kg
- Motor Compressor Ratings (RLA/LRA): (fields exist, values not specified)
- Evaporator Fan (FLA): (field exists, value not specified)
- Number of Evaporator Fans: 4
- Condenser Fan (FLA): (field exists, value not specified)
- Number of Condenser Fans: 2
- Production Date: 07/2020
- Climatic Class: (not specified, but a field exists)
- Weight: 650 kg
The chiller's dimensions are provided on page 24, with a width of 940 units, a depth of 1426 units, and a height of 2653 units. The condensing unit (optional, page 25) has dimensions of 801 units wide, 1120 units deep, and 630 units high.
Usage Features:
The device features a display for setting, adjusting, and viewing functions (page 36).
- First Start-up: Involves setting the company name, time zone, language, date, time, and units of measurement (pages 36-38).
- Cycles: The manual details various blast chilling (+37°C) and freezing (+0°C) cycles, including "Soft Chilling," "Hard Chilling," and specific programs for different food types like "Bread," "Pizza," "Meat/Fish," "Soups/Sauces," "Sushi," "Tartare," "Cakes," "Creams," and "Vegetables" (pages 39-42).
- Operating Modes: Offers "Full Mode" (72 cycles) and "Easy Mode." Full Mode allows for 24 blast chilling, 24 freezing, and 24 customized cycles. Easy Mode provides simplified "Soft" and "Hard" blast chilling (+37°F) and freezing (+0°F) programs that are not editable (page 43).
- Cycle Operation: Cycles can be started with time or core temperature priority. The cycle time and fan speed can be adjusted. An infinite cycle mode is available (page 47-48).
- Cycle Customization: Users can replace preset cycles, duplicate, change, or restore blast chilling/freezing cycles (pages 46-47).
- Defrosting: The device supports adaptive or timed defrosting, with various duration options (page 48-49).
- Ionization: An ionization function can be activated with 15 different intensity levels for sanitization, operating only when the door is closed (page 49-50).
- HACCP: The system records anomalies during cycles or conservation phases, including date, time, door openings, alarms, temperatures, and product batch information (page 50-51).
- Data Export: Allows exporting alarm logs and HACCP logs to internal memory or a USB stick (page 51-52).
- Parameter Import/Export: Enables saving and loading machine parameters (page 52).
- Detailed Display Menu: Provides information on fan operation, electronic expansion valves, condensing unit status, and temperature trends (pages 53-54).
Maintenance Features:
The manual outlines routine and extraordinary maintenance procedures (page 67).
- General Safety: Emphasizes disconnecting the blast chiller from the mains power supply before any maintenance and using original spare parts (page 67).
- Chilling Cabinet Cleaning: Daily cleaning of food-contact surfaces and stainless steel parts, checking door gaskets, and evaporator/tray support. Defrosting by leaving the door open is recommended. Avoid pressurized water jets, metal tools for ice removal, solvents, thinners, or abrasive detergents. Daily cleaning of the needle probe is crucial (page 68).
- Condensing Unit and Electrical System Cleaning: Monthly cleaning of the condensing unit to remove dust and grease. Regular checks of electrical terminals and refrigerant circuit for leaks (every 4 months). Refrigerant gas leak checks are recommended annually (3-30 kg charge), every six months (30-300 kg charge), or quarterly (over 300 kg charge). If a leak is found, prompt intervention, filter replacement, and oil/refrigerant checks are necessary (page 68).
- Evaporator Cleaning: Involves defrosting, opening the fan doors, and carefully cleaning the evaporator coil, avoiding bending aluminum fins. Do not use pressurized water jets or aggressive products (page 71).
- Ionizer Maintenance: Requires periodic cleaning of quartz condensers (every 1-3 months depending on air quality) and replacement after approximately 8,000 hours of continuous operation or when the quartz appears opaque (page 71).
- Troubleshooting: A detailed section provides possible causes and solutions for various alarms and faults, such as fan open alarms, door open alarms, EPROM damage, temperature alarms, and power supply issues (pages 55-65).
The manual stresses the importance of proper installation, handling, and disposal by qualified and authorized personnel to ensure safety and optimal machine performance. It also highlights the need for personal protective equipment during various operations.
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