Muller MMT / MLT Unit Cooler – Medium & Low Temperature Refrigeration Evaporator

Muller MMT and MLT Unit Coolers are commercial refrigeration evaporator units designed for medium-temperature and low-temperature cold room applications. Manufactured for reliable refrigeration performance, the Muller unit cooler range is available in multiple capacities, fan configurations and coil options to suit different cold room and refrigeration requirements.

The MMT series is designed for medium-temperature applications, while the MLT series is designed for low-temperature and freezer applications. The range includes models with 1 to 5 fans, providing a broad selection for cold rooms, chill rooms, freezers, food storage facilities and other commercial refrigeration systems.

The Muller MMT/MLT series features a practical cabinet design with front access to the electrical panel and a separate refrigeration component compartment, making inspection and maintenance more convenient. The electrical board is front-facing, while the drain tray is supported by lanyards for easier servicing.

Muller MMT Medium Temperature Unit Cooler

The Muller MMT Medium Temperature Unit Cooler is designed for chilled-room and medium-temperature refrigeration applications. The catalogue specifies the MMT performance rating at -8°C SST, 0°C room temperature and 8K TD under SC2 conditions.

The MMT range is available with standard and electric-defrost configurations. MMT models are available with different fin spacing options, including 4, 5 and 6 FPI, as well as options such as stainless-steel casing and fin protection.

Muller MLT Low Temperature Unit Cooler

The Muller MLT Low Temperature Unit Cooler is designed for freezer and low-temperature cold-room applications. The catalogue provides SC3 ratings at -25°C SST, -18°C room temperature and 7K TD, and SC4 ratings at -31°C SST, -25°C room temperature and 6K TD.

The MLT range is suitable for applications requiring low-temperature refrigeration and freezer conditions, with multiple models available across different fan and capacity configurations.

Key Features

• Muller commercial refrigeration unit cooler / evaporator
• Medium-temperature MMT series
• Low-temperature MLT series
• Multiple model sizes and capacities
• Available in 1 to 5 fan configurations
• 300 mm and 350 mm fan diameter options
• Front-facing electrical compartment for easier access
• Separate refrigeration component compartment
• Drain tray supported by lanyards for maintenance
• Drain heaters positioned at the bottom of the coil for easy access
• Extended drain-heater arrangement provides additional heat to end compartments
• Available electric-defrost models
• Optional stainless-steel casing
• Optional fin protection
• Multiple fin-space configurations
• Suitable for commercial and industrial refrigeration applications
• Designed for cold rooms, chill rooms, freezers and food storage applications

Typical Applications

Muller MMT / MLT unit coolers can be considered for:

• Cold rooms
• Chiller rooms
• Freezer rooms
• Food storage rooms
• Meat storage
• Seafood storage
• Frozen food storage
• Supermarkets
• Food processing facilities
• Distribution centres
• Refrigerated warehouses
• Commercial refrigeration systems
• Industrial refrigeration applications

Model Selection

The Muller MMT and MLT series provides a wide range of model numbers, making it easier to select a unit cooler according to room temperature, required refrigeration capacity, fan configuration and application conditions.

For correct equipment selection, the actual refrigeration capacity should be checked against the required SST, room temperature, KTD, refrigerant, fin spacing and operating conditions. The manufacturer's catalogue specifically notes that capacity correction factors and application limits apply.

Muller MMT Medium Temperature Models

The catalogue lists the 300 mm MMT models together with their corresponding MMT-H electric-defrost versions. The 350 mm MMT range similarly includes models from MMT030 through MMT259, with corresponding H versions.

MMT Model Number Search List

Important: The “H” designation indicates the model is equipped for electric defrost.

Muller MLT Low Temperature Models

The catalogue lists 22 MLT low-temperature models across the 300 mm and 350 mm fan configurations.

MLT Model Number Search List

MMT / MLT Model Nomenclature

The Muller catalogue provides a model nomenclature system that can also be useful when customers are searching by configuration.

Refrigeration Performance

MMT performance ratings are based on SC2 conditions of -8°C SST, 0°C room temperature and 8K TD.

MLT performance ratings are based on:

These ratings are catalogue conditions and should not be treated as the actual capacity for every installation. Capacity correction factors are provided by the manufacturer for different operating conditions.

Why Choose Muller Unit Coolers?

Muller unit coolers provide refrigeration contractors and system designers with a broad selection of evaporator configurations for medium- and low-temperature applications. With multiple model sizes, fan configurations, fin-spacing options and defrost arrangements, the range can be matched to different cold-room operating requirements.

For projects requiring accurate equipment selection, please provide the room temperature, room dimensions, required product temperature, refrigerant, target SST, desired capacity and defrost requirement so the appropriate Muller model can be selected.

Available from RNA Engineering & Trading Sdn. Bhd. for refrigeration and cold-room applications in Malaysia.