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Single-Package Rooftop
Standard Efficiency
Electric Cooling Units
with Optional Electric Heat
3 to 27.5 Nominal Tons

48/50TC WeatherMaster Rooftop Unit with Puron Refrigerant

50TC WEATHERMAKER® rooftop unit were designed by customers for customers. With a gauge plug, centralized control center, plug & play accessory board, “no-strip screw” collars, and handled access panels, we’ve made the unit easy to install, easy to maintain, and easy to use. Units are pre-wired and pre-charged with environmentally sound Puron® (R-410A) refrigerant at the factory. The units are factory tested in cooling mode.

Performance Features
  • Puron® (R-410A) HFC refrigerant
  • ASHRAE 90.1 compliant
  • Single-stage capacity control (sizes 04 to 12)
  • Two-stage cooling capacity control (sizes 08 to 30)
  • SEERs up to 13.0
  • EERs up to 11.3
  • IEERs up to 12.2
  • Exclusive non-corrosive composite condensate pan in accordance with ASHRAE 62 Standard, sloping design; side or center drain
  • Pre-painted exterior panels and primer-coated interior panels tested to 500 hours salt spray protection
  • Acutrol™ refrigerant metering system
  • Fully insulated cabinet
  • Cooling operating range up to 115°F (46°C) and down to 25°F (-4°C) with winter start kit
  • Rated in accordance with ARI Standards 210 (sizes 04-06) and 360 (sizes 07-30)
  • Designed in accordance with Underwriters’ Laboratories Standard 1995
  • Listed by UL and UL, Canada, or ETL
Maintenance Features
  • Access panels with easy grip handles
  • Innovative , easy starting, no-strip screw feature on unit access panels
  • Two-inch disposable return air filters
  • Tool-less filter access door
  • Belt drive evaporator-fan motor and pulley combinations available to meet any application
  • New control terminal board facilitating simple safety circuit troubleshooting and simplified control box arrangement
Installation Features
  • Field convertible from vertical to horizontal airflow for slab mounting; No special kits required (sizes 4 to 14 only). Field kit required for 016 sizes.
  • Provisions for thru-the-bottom power entry capability as standard
  • Dedicated vertical and horizontal airflow models available (factory option for sizes 17 to 30 only)
  • Single point electric connections
  • Full perimeter base rail with built-in rigging adapters and fork truck slots
Reliability Features
  • Scroll compressors with internal line-break overload protection
  • 24-volt control circuit protected with resettable circuit breaker
  • Permanently lubricated evaporator-fan motor
  • Totally enclosed condenser motors with permanently lubricated bearings
  • Low pressure and high-pressure switch protection
  • Liquid line filter drier as standard
Standard Limited Warranty
  • 5 years parts only electric heater
  • 5 years parts only compressor
  • 3 years parts only on Novation™ condenser coil
  • One year parts only on all other parts
  • Extended warranty packages available
50TC Options and Accessories
Category Item Factory
Cabinet Thru -the-base electrical or gas-line connections Y Y
Coil Options Cu/Cu indoor and/or outdoor coils Y5  
Pre-coated outdoor coils Y5
Premium, E-coated outdoor coils Y5  
Humidity Control Humidi-MiZer Adaptive dehumidification system (sizes 04-28 only) Y5  
Condenser Protection Condenser coil hail guard (louvered design) Y5 Y
Controls Thermostats, temperature sensors, and subbases   Y
PremierLink DDC communicating controller Y Y
RTU-OPEN multi-protocol controller Y  
Smoke detector (supply and/or return air) Y Y (sizes 17-30)
Time Guard II compressor delay control circuit   Y
Filter status switch1   Y
Fan status switch1   Y
Economizers & Outdoor Air Dampers EconoMi$er IV (for electro-mechanical controlled RTUs) Y5 Y
EconoMi$er2 (for DDC controlled RTUs) Y5 Y
Motorized 2 position outdoor-air damper Y5 Y
Manual outdoor-air damper Y (sizes 17-30) Y
Barometric relief2 Y Y
Power exhaust Y (sizes 17-30) Y
Economizer Sensors & IAQ Devices Single dry bulb temperature sensors3 Y Y
Differential dry bulb temperature sensors3   Y
Single enthalpy sensors3 Y Y
Differential enthalpy sensors3   Y
CO2 sensor (wall, duct, or unit mounted)3 Y Y
Indoor Motor & Drive Multiple motor and drive packages Y  
Low Ambient Control Winter start kit   Y
Motormaster head pressure controller4   Y
Power Options Convenience outlet (powered) Y5  
Convenience outlet (unpowered) Y  
Non-fused disconnect Y  
Roof Curbs Roof curb 14-in. (356mm)   Y
Roof curb 24-in. (610mm)   Y

Refer to Product Data for further information.


1. Use in conjunction with specialized thermostat or controls device.
2. Included with economizer.
3. Sensors for optimizing economizer.
4. See application data for assistance.
5. Not available on single phase models.

Puron evironmentally sound refrigerantashrae90.1
AHRI standard 210/240 unitary small ac
C-UL-USC-UL-USQuality Assurance Certified to ISO 9001

Additional Information
Physical data
RTU-OPEN Controller
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