Thermaster D-G7 7-Tray Commercial Blast Chiller & Shock Freezer | GN 1/1 10A

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Halt bacterial proliferation, preserve culinary moisture, and safeguard cellular food texture with the Thermaster D-G7 7-Tray Commercial Blast Chiller & Shock Freezer. Purpose-engineered for Australian commercial catering operations, production kitchens, aged care facilities, hotel banqueting suites, artisan bakeries, and high-volume restaurants, this heavy-duty undercounter blast unit reduces hot core temperatures from +70°C down to +3°C in under 90 minutes, or down to -18°C shock freezing, strictly complying with Australian Standard 3.2.2 and HACCP guidelines.

HACCP-Compliant Rapid Chilling & Shock Freezing (+70°C to -18°C)

Allowing cooked food to cool slowly at room temperature leaves it exposed in the biological danger zone (+5°C to +60°C), triggering bacterial bloom and moisture loss. The Thermaster D-G7 rapidly draws down core temperatures:

• Blast Chilling Mode (+70°C to +3°C in <90 mins): Locks in natural colour, moisture, nutrients, and aroma while halting bacterial activity.

• Shock Freezing Mode (+70°C to -18°C): Micro-crystallises cellular moisture rapidly to prevent large, jagged ice crystals from rupturing food fibres, ensuring delicate fish, meats, and pastries thaw without moisture bleed or texture damage.

A high-precision core temperature food probe pairs with an intuitive digital microprocessor controller and LED display, automatically adjusting airflow cycles and logging exact core pull-down readings for food safety auditing.

High-Capacity 7 x GN 1/1 Tray Configuration

Engineered for cook-chill operations and batch production, the internal racking system accommodates up to seven full-size GN 1/1 Gastronorm pans (or 400 x 600 mm bakery trays) across its 224-litre gross volume (127L net). This direct-pan layout allows chefs to transfer steaming trays straight from combi ovens, steamers, or bratt pans directly into the chilling cavity without decanting or handling food twice.

European Refrigeration Engineering in Tropical 40°C Ambients

Commercial cooklines generate significant ambient heat. The D-G7 is tropical-rated to perform reliably in ambient kitchen temperatures up to 40°C (with 40% relative humidity), driven by premium European-engineered hardware:

• High-Displacement European Condenser & Evaporator Fans: Deliver dynamic, fan-forced high-velocity airflow that wraps evenly around every pan tier.

• Specialised Anti-Crystallisation Air Circulation: Prevents surface skin drying and uneven crust freezing during rapid cycle pull-down.

• Automated Cycle Defrost & Drainage: Incorporates an automated defrost cycle with a heated, self-evaporating condensate pan, eliminating manual defrosting and external drain plumbing.

Heavy-Duty Commercial Stainless Steel Construction

Built for heavy commercial line duty, the D-G7 features food-grade stainless steel construction across internal and external surfaces. The internal cabinet is fabricated with smooth, rounded coved transitions that eliminate food traps and facilitate rapid sanitisation. A heavy-duty, self-closing hinged door with magnetic seals prevents accidental cold air loss during hectic production shifts.

Energy-Efficient Plug-and-Play Australian 10A Connection

Despite its 300 kg commercial chassis and high refrigeration capacity, the D-G7 operates on standard single-phase 240V power with an economical 480W power rating (approx. 2.0 Amps on a standard 10A plug). This plug-and-play capability connects directly into existing commercial wall sockets without requiring costly three-phase electrical modifications.

Key Features & Benefits

• HACCP-Compliant Blast Chilling: Drops cooked food core temperatures from +70°C to +3°C in under 90 minutes, eliminating bacterial bloom.

• Rapid Deep Shock Freezing: Pulls food down to -18°C to prevent cellular structural damage and eliminate moisture loss upon thawing.

• Accommodates 7 x GN 1/1 Trays: High-density pan capacity fits standard Gastronorm pans directly from commercial ovens.

• Core Temperature Probe Included: Accurately measures internal food heat and automates cycle completion for verified HACCP records.

• Tropical 40°C Ambient Rating: Engineered with European fans and heavy-duty refrigeration to operate smoothly on hot Australian cooklines.

• Anti-Crystallisation Airflow Design: Ensures rapid heat extraction without drying out delicate sauces or crusting cooked proteins.

• Food-Grade Stainless Steel Build: Hygienic stainless interior and exterior with coved corners for fast, compliance-ready sanitisation.

• Self-Closing Hinged Door: Heavy-duty door assembly with magnetic gaskets seals tightly to prevent thermal leakage.

• Zero-Plumbing Condensate Evaporation: Automatic cycle defrost with an internal heated pan evaporates meltwater without requiring floor waste plumbing.

• Standard Australian 10A Plug Setup: 480W power consumption connects straight into standard 240V single-phase commercial power points.

• 2 Years Commercial Warranty: Backed by 2 Years Parts and Labour warranty for dependable peace of mind.

Technical Specifications

Daily Care, Maintenance & End-of-Shift Sanitisation

To protect refrigeration efficiency, prevent cross-contamination, and ensure commercial hygiene compliance:

1. Power Isolation: Before undertaking deep interior cleaning or removing internal tray racks, isolate the unit at the power point and disconnect the plug from the 10A wall outlet.

2. Core Probe Sanitisation: Wipe down the stainless steel core temperature probe immediately after every cycle using an approved commercial alcohol probe wipe or food-safe sanitiser. Never leave food residue or grease to bake onto the probe shaft or cable.

3. Internal Cabinet Sanitisation: Remove the wire tray slides and wipe down the stainless steel interior cavity and floor deck daily. Wipe down the perimeter magnetic door gasket with warm, mild soapy water to remove accumulated food spills, ensuring an airtight seal.

4. Stainless Steel Exterior Care: Wipe down the stainless steel worktop, door face, handles, and side panels daily using warm water and a neutral commercial sanitiser. Dry thoroughly with a clean microfibre cloth following the grain of the steel. Never use steel wool, wire brushes, metal scrapers, or chlorine bleach, as these will scratch the surface and induce pitting.

5. Condenser Coil Dusting (Crucial for Rapid Pull-Down): Unplug the unit and inspect the compressor ventilation compartment monthly. Airborne kitchen grease and dust accumulate on the condenser fins, restricting airflow and forcing the refrigeration system to run hotter and take longer to chill. Vacuum or gently brush the condenser fins with a soft brush attachment at least once a month.

6. Drainage Clearance: Check the internal condensate drain channel during routine cleaning to ensure it remains clear of loose food debris and packaging.

7. Electrical Safety: Never wash down the blast chiller with a commercial pre-rinse hose or high-pressure spray gun, and ensure water does not enter the digital controller or rear ventilation louvres.

Kitchen Placement & Operational Guidelines

The Thermaster D-G7 is engineered for commercial cook-chill lines, prep passes, and production kitchens:

1. Standard 10A Electrical Connection: The blast chiller draws an economical 480W on standard single-phase 240V power and comes fitted with a standard Australian 10 Amp plug. Connect directly into a dedicated commercial wall outlet. Avoid the use of domestic extension leads or double adaptors.

2. Solid Floor Positioning & Structural Load: Position the heavy 300 kg unit (approaching 400 kg when fully loaded with hot pans) on a completely flat, level, and solid commercial concrete floor capable of supporting the combined weight.

3. Condenser Airflow Clearances: Maintain at least 100 mm of clearance around all refrigeration ventilation louvres to allow hot exhaust air to dissipate efficiently during rapid pull-down cycles. Never box the unit into a completely unventilated cavity.

4. Thermal Separation & Direct Heat: While rated for 40°C ambient temperatures, avoid positioning the unit directly adjacent to intense open-flame cooking equipment (such as open charbroilers, deep fryers, or wok burners) without a thermal heat barrier. Ambient radiant heat forces the refrigeration system to cycle continuously and prolongs pull-down times.

5. Core Probe Placement: When running a probe-driven cycle, insert the core probe horizontally into the thickest, geometric center of the densest food portion. Avoid letting the probe tip touch pan bases, bone, or fat pockets, as this causes premature cycle shut-off.

6. Pan Loading Protocol: Spread food evenly across pans up to a maximum recommended depth of 40–50 mm. Overfilling pans creates thermal barriers that delay core heat transfer and prevent compliance with the 90-minute chilling window.

Freight & Delivery Notice

Standard commercial road freight delivery is available Australia-wide to commercial business addresses with level ground access or loading docks. Due to the substantial 300 kg net weight and large footprint of this commercial blast chiller, tail-lift delivery or a commercial loading dock with heavy-duty pallet handling equipment is strictly required. For deliveries to residential or non-commercial addresses, please contact our friendly commercial sales team prior to ordering to obtain a customised courier quote and confirm delivery logistics.

Frequently Asked Questions

Can I plug this blast chiller into a standard Australian 10 Amp power point?

Yes. The Thermaster D-G7 draws an economical 480W on standard single-phase 240V power and comes fitted with a standard Australian 10 Amp 3-pin plug. It connects straight into standard commercial wall sockets with no specialized electrical wiring required.

What is the difference between blast chilling and standard refrigeration?

A standard commercial refrigerator is designed only to hold cold food (+2°C to +5°C) and lacks the compressor displacement or fan-forced velocity to chill hot items safely. Placing steaming hot food into a regular fridge causes ambient cabinet heat to rise, risking existing stock and taking hours to pass through the danger zone (+5°C to +60°C). The D-G7 blast chiller rapidly extracts heat from +70°C down to +3°C in under 90 minutes, complying strictly with Food Safety Standard 3.2.2.

Why does shock freezing protect food quality better than standard freezing?

Slow freezing in a standard freezer forms large, sharp ice crystals that puncture cell walls, resulting in mushy texture and heavy moisture loss (drip loss) when thawed. The D-G7's high-velocity shock freezing pulls food down to -18°C so rapidly that only microscopic ice crystals form, preserving cellular structure, natural moisture, and texture upon thawing.

How does the core probe function?

The core probe inserts directly into the centre of the food. The digital controller monitors this internal sensor in real time, running the high-velocity chilling cycle until the core reaches the programmed target (+3°C or -18°C), then automatically shifts into an energy-efficient holding mode.

What size pans fit inside the unit?

The D-G7 is designed with adjustable internal runners that accommodate up to seven full-size GN 1/1 Gastronorm pans (up to 65 mm deep) or 400 x 600 mm commercial bakery trays.

Does this unit require dedicated plumbing for drainage?

No. The D-G7 features an automatic cycle defrost system with an internal heated condensate evaporation pan. Defrost meltwater drains directly into the heated pan near the compressor where heat evaporates the water automatically.

N.B Image is for illustrative purposes only. Specifications are subject to change without notice.