50A Packaged Rooftop Unit from Carrier

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50A WEATHERMAKER®

Packaged Rooftop
Electric Cooling Units
With Puron® Refrigerant (R-410A)
20 to 60 Tons

50A2 - CV, Vertical
50A3 - VAV, Vertical
50A4 - CV, Horizontal
50A5 - VAV, Horizontal

Carrier "A" – Series Rooftop products are pre-wired and charged with refrigerant and tested in both cooling and heating modes at the factory.

All 50A models feature an industrial grade cabinet with fully hinged access panels. Superior supply fan performance with up to 3.5 in. external static pressure is standard.

They are available in dedicated vertical down shot and horizontal side supply/return airflow models. There are "A" Series models available for Constant Volume or Variable Air Volume applications. Units are available as cooling-only or with a variety of electric heat options.

All "A" Series units come standard with ComfortLink™ control and Scroll compressors on dual independent TXV controlled refrigeration circuits.

Interactive Tour
(requires Flash)

Performance Features

High-efficiency scroll compressors
TXV refrigerant metering device for each circuit
Two-stage cooling on Constant Volume units, with multiple adaptive demand control for up to 5 stages of cooling capacity
Cooling operation range up to 120° F ambient and down to 35° F ambient
115-volt and 24-volt control circuit
Sloped, aluminized steel condensate pan
Two-inch disposable-type return air filters (Optional four inch available)
Fixed speed belt-drive blower drive
High-efficiency motors meet EPACT (Alternate motors are available)
Two-position outside air damper is standard, capable of admitting up to 25% outdoor air during fan operation, closed when the fan is off. Outside air hoods and permanent filters.
Meet or exceed the EER requirements of ASHRAE Standard 90.1
Rated in accordance with ARI Standard 340/360
Tested in accordance with UL Standard 1995
Listed by ETL and ETL, Canada
Variable Air Volume Units:
- Adjustable speed drive with true torque control (VFD)
- Soft start and anti-windmilling control
- Supply duct static pressure control
- Discharge air temperature control
- Supply air temperature reset
- Up to 6 steps of cooling capacity staging available with optional hot gas bypass
ComfortLink™ control:
- Easy to use Scrolling Marquee Display
- Time schedule
- Space temperature sensor capability
- Service diagnostics, alarms and alarm history
- CO₂ sensor capability for Demand Control Ventilation (DCV)
- Compressor reverse rotation protection
- Short-cycle compressor protection
- Self-diagnostic service and start up run test capability
- Carrier Comfort Network® communications or stand-alone operation
- Remote start/stop capability
- ComfortID™ system with 35 and 45 series PIC terminals

Maintenance Features

Large hinged service access doors

Installation Features

Single point electrical service entry, thru unit bottom or side
Lifting lugs

Reliability Features

Dual electrically and mechanically independent refrigeration circuits
Crankcase heaters are standard on all models
Compressor protection includes high and low pressure transducers with safety cutouts
Coil frost protection
Liquid line filter driers
Circuit breaker protection for all power components
Cabinet made of pre-painted, galvanized steel with baked enamel finish, which meets ASTM B117 salt spray resistance
Condenser-fan motors are totally enclosed, with internal protection

Standard Limited Warranty

Standard one-year warranty
Five-year non pro-rated warranty on heat exchanger

Factory Installed Options

Electric Heat
Low electric heat	Yes
High electric heat	Yes
Indoor Air Quality
2-inch filters	Yes
4-inch filters	Yes
Return air CO₂ sensor	Yes
Economizer
Manual outside air self-closing damper	Yes
Modulating economizer 3-position damper	Yes
Exhaust Air Control
Barometric relief	Vertical units only
Non-modulating power exhaust	CV vertical units only
Modulating power exhaust and static sensor	Vertical units only
Condenser and Evaporator Coils
Al/Cu condenser & evaporator	Yes
Al/Cu Pre-coat condenser & Al/Cu evaporator	Yes
Al/Cu E-coat condenser & Al/Cu evaporator	Yes
Cu/Cu condenser & Al/Cu evaporator	Yes
Hot gas bypass	Yes
Galvanized drain pan	Yes
Stainless drain pan	Yes
Controls
Controls option board	Yes
Return air CO₂ sensor	Yes
Return air smoke detector	Yes
Filter switch	Yes
Power Circuit
GFI convenience outlet (powered)	Yes
GFI convenience outlet (not powered)	Yes
Power terminal block	Yes
Non-fused disconnect	Yes
Indoor Motor Options
Low HP, standard efficiency	Yes
Medium HP, standard efficiency	Yes
High HP, standard efficiency	Yes
Low HP, high efficiency	Yes
Medium HP, high efficiency	Yes
High HP, high efficiency	Yes

Field-Installed Accessories

Indoor Air Quality
Return air CO₂ sensor	Yes
CO₂ space sensor	Yes
CO₂ aspirator box	Yes
Economizer
Outdoor or return humidity sensor (enthalpy)	Yes
Exhaust Air Control
Barometric relief	Yes
Non-modulating power exhaust	Yes
Modulating power exhaust and static sensor	Yes
Supply and building pressure control board	Yes
Build pressure control sensor	Yes
Condenser and Evaporator Coils
Condenser coil hail guard assembly	Yes
Controls
Controls option board	Yes
Enhanced display	Yes
Navigator™ display	Yes
Return air CO₂ sensor	Yes
Supply smoke detector	Yes
Filter switch	Yes
Fan status switch (requires options board)	Yes
T55 thermostat	Yes
T56 thermostat	Yes
T58 sensor	Yes
Space temperature sensor with CO₂ override	Yes
Space temperature sensor setpoint and CO₂ override	Yes
Remote enhanced display	Yes
Thermostats (Debonair®)	CV units only
Thermostats (Slimline)	CV units only
Thermostats (Corporate)	CV units only
BACnet/MODBUS Carrier translator	Yes
LonWorks Carrier translator	Yes
Miscellaneous Options
Roof curb adapter kit	Yes
14-inch roof curb	Yes
Low ambient control (Motormaster® V )	Yes



	Size 20		ISO 9001:2000 #A2260

Carrier Corporation

A Member of The United Technologies Corporation Family

Stock Symbol: UTX

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