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Desert Master™
50TJM

Single-Packaged Rooftop
Electric Cooling Units
Puron® (R-410A) Refrigerant

15.0 to 30.0 nominal tons

puron-refrigerant

The 50TJM units are single side discharge rooftop cooling unit utilizing electric heat as an option. Units are prewired, pre-charged with R-410A refrigerant, and tested at the factory. These units can be placed on the side of a building or can be placed on a roof without roof curbs. Each unit is designed to occupy a minimal space. Piping and drain connections are readily accessible.

Carrier’s Package Rooftop Unit software makes selecting and optimizing the 50TJM easy.

Installation Features

  • Single point electrical service entry
  • Side discharge application
  • No roof curb needed
  • Side by Side supply and return air
  • Separate panel for control box

Performance Features

  • HFC R-410A refrigerant
  • ASHRAE 90.1 Compliant
  • EER’s up to 10.9
  • TXV refrigerant metering device
  • Two independent refrigerant circuits, each with a scroll compressor
  • Low outdoor temperature cooling operation down to 40°F
  • Cooling operating range up to 125 °F (51.6°C)
  • Liquid filter drier standard on each circuit
  • Fresh air intake capability
  • Non-corrosive sloped condensate drain pan in accordance to ASHRAE 62 standard
  • Thermally protected and permanently lubricated condenser and evaporator fan motors
  • Angle type return air section with washable type filters

Environmentally Responsible Refrigerant Choice

R-410A refrigerant is:

  • A chlorine-free refrigerant from the HFC group
  • Has zero ozone depletion potential
  • Thermally efficient and provides high EER (energy efficiency), COP, and part load efficiencies

Superior Reliability, Efficiency and Safety

  • Exceptional endurance tests
    • Painted panels tested to ASTM B-117 500 hours salt spray protection
    • Pre-coated fin condenser coil for extra corrosion protection
  • Compressor Protection:
    • High and low pressure cutouts
    • Compressor lockout
    • Phase protection relay
    • Crankcase heaters are standard for all units
    • Internal over temperature protection
    • Freeze protection
  • Low vibration design:
    • Leak-tight refrigerant circuit
    • Brazed refrigerant connections for increased leak tightness
    • Low-noise scroll compressors with low vibration levels
  • Control circuit protected by circuit breaker
  • Thermally protected and permanently lubricated condenser and evaporator fan motors
  • Angle type return air section with washable type filters
  • Transformer for safe 24v control circuit supply included
  • State-of-art scroll compressor technology
  • Dual, electrically and mechanically independent refrigerant circuit
  • Double skin construction, Insulated cabinet

Standard Limited Warranty

  • 5 years on compressors and 2 years parts on systems up to 25 tons
  • Extended warranty packages available

Factory-Installed Options

  1. Refrigerant sight glass - Installed on each circuit
  2. Pre-coated fins - condenser only
  3. Copper fins - condenser only
  4. Copper fins - condenser and evaporator

Field-Installed Options

  1. Electric Heater Package: The electric heater package is factory supplied for field installed. Heater assemblies are provided with internal fusing for protection of heater circuits not exceeding 25 amps each. All power wiring leads are 8 AWG and control wiring are 18AWG, both rated at 105°c. Auto reset thermo limit controls, magnetic heater contractors (24v coil) and terminal block are mounted in electric heater control box attached to heater assembly.
  2. UVC Ready: The unit shall be UVC ready for easy installation. UVC Lamp is field supplied and field installed.
  3. Softbag Filters: Softbag filters are factory supplied and field installed. Softbag filters are in compliance of Eurovent EU7.

Physical Data

Unit Size Nominal Cooling Capacity (tons) AHRI Efficiency (EER) Dimensions (mm) (LxWxH) Approx Unit Weight (kg)
18 15 10.3 2440x2182x1348 860
24 20 10.4 2440x2182x1348 880
28 25 10.9 3200x2432x1374 1125
34 30 10.5 3200x2432x1374 1150

Installation Features

  • Single point electrical service entry
  • Side discharge application
  • No roof curb needed
  • Side by Side supply and return air
  • Separate panel for control box

Performance Features

  • HFC R-410A refrigerant
  • ASHRAE 90.1 Compliant
  • EER’s up to 10.9
  • TXV refrigerant metering device
  • Two independent refrigerant circuits, each with a scroll compressor
  • Low outdoor temperature cooling operation down to 40°F
  • Cooling operating range up to 125 °F (51.6°C)
  • Liquid filter drier standard on each circuit
  • Fresh air intake capability
  • Non-corrosive sloped condensate drain pan in accordance to ASHRAE 62 standard
  • Thermally protected and permanently lubricated condenser and evaporator fan motors
  • Angle type return air section with washable type filters

Environmentally Responsible Refrigerant Choice

R-410A refrigerant is:

  • A chlorine-free refrigerant from the HFC group
  • Has zero ozone depletion potential
  • Thermally efficient and provides high EER (energy efficiency), COP, and part load efficiencies

Superior Reliability, Efficiency and Safety

  • Exceptional endurance tests
    • Painted panels tested to ASTM B-117 500 hours salt spray protection
    • Pre-coated fin condenser coil for extra corrosion protection
  • Compressor Protection:
    • High and low pressure cutouts
    • Compressor lockout
    • Phase protection relay
    • Crankcase heaters are standard for all units
    • Internal over temperature protection
    • Freeze protection
  • Low vibration design:
    • Leak-tight refrigerant circuit
    • Brazed refrigerant connections for increased leak tightness
    • Low-noise scroll compressors with low vibration levels
  • Control circuit protected by circuit breaker
  • Thermally protected and permanently lubricated condenser and evaporator fan motors
  • Angle type return air section with washable type filters
  • Transformer for safe 24v control circuit supply included
  • State-of-art scroll compressor technology
  • Dual, electrically and mechanically independent refrigerant circuit
  • Double skin construction, Insulated cabinet

Standard Limited Warranty

  • 5 years on compressors and 2 years parts on systems up to 25 tons
  • Extended warranty packages available

Factory-Installed Options

  1. Refrigerant sight glass - Installed on each circuit
  2. Pre-coated fins - condenser only
  3. Copper fins - condenser only
  4. Copper fins - condenser and evaporator

Field-Installed Options

  1. Electric Heater Package: The electric heater package is factory supplied for field installed. Heater assemblies are provided with internal fusing for protection of heater circuits not exceeding 25 amps each. All power wiring leads are 8 AWG and control wiring are 18AWG, both rated at 105°c. Auto reset thermo limit controls, magnetic heater contractors (24v coil) and terminal block are mounted in electric heater control box attached to heater assembly.
  2. UVC Ready: The unit shall be UVC ready for easy installation. UVC Lamp is field supplied and field installed.
  3. Softbag Filters: Softbag filters are factory supplied and field installed. Softbag filters are in compliance of Eurovent EU7.

Physical Data

Unit Size Nominal Cooling Capacity (tons) AHRI Efficiency (EER) Dimensions (mm) (LxWxH) Approx Unit Weight (kg)
18 15 10.3 2440x2182x1348 860
24 20 10.4 2440x2182x1348 880
28 25 10.9 3200x2432x1374 1125
34 30 10.5 3200x2432x1374 1150