PACKAGED ROOFTOP 50A
Description
Carrier PACKAGED ROOFTOP 50A.
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.
See more Carrier Packaged Rooftop Solutions. Carrier PACKAGED ROOFTOP 50A.
Features
PerformanceReliabilityInstallationMaintenanceStandard WarrantyFactory-Installed OptionsField-Installed Accessories
- 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.
- 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.
- Single point electrical service entry, thru unit bottom or side.
- Lifting lugs.
- Large hinged service access doors.
- Standard one-year warranty.
- Five-year non pro-rated warranty on heat exchanger.
| 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 |
| 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 |
Documents
Product Data
