Rheem 20 Ton R-454B Commercial Packaged Air Conditioner — RACGYB240ADG000BACA0
The Rheem RACGYB240ADG000BACA0 is the 460V three-phase version of Rheem's 20-ton Commercial Renaissance Classic Series rooftop package, delivering 228,000 BTU/h AHRI net cooling at an 11.0 EER and 14.2 IEER on R-454B. Its 460V wiring drops each compressor's draw to about 13.5 A from 28.5 A on the 208/230V build, a real advantage when a 460V service supplies several large rooftops. It retains the two-stage dual-circuit compressor layout, SmartShield interlaced MicroChannel coils, refrigerant leak detection, and 8,000 CFM belt-drive VFD supply fan in a convertible downflow or horizontal cabinet.
Is a 20-Ton Package Unit the Right Size?
This 20-ton unit is a high-capacity rooftop matched to loads near 228,000 to 240,000 BTU/h, frequently roughly 8,000 to 12,000 sq ft in typical commercial construction. Because it serves very large open zones with substantial internal and ventilation loads, sizing from an engineered load analysis rather than square footage is essential.
Ventilation air, high occupancy, large glazing, and cooking or equipment loads can each swing a 20-ton requirement by tons. A packed assembly space or busy retail floor behaves very differently from a lightly occupied warehouse of the same footprint. A proper commercial load calculation confirms whether one 20-ton unit is right, or whether the space is better served by multiple systems, and keeps the two-stage staging and latent (humidity) performance effective.
Ideal for: The largest single-zone loads in arenas, warehouses, manufacturing plants, and institutional complexes fed from 460V three-phase power, where multiple large rooftops share one service.
Need more capacity? Need more than 20 tons? Browse Rheem's larger 25-ton RACG rooftops and the full packaged air conditioner category for additional capacities and voltages.
Recommended applications are general guidelines only. Actual capacity requirements depend on insulation, ventilation, occupancy, solar gain, ceiling height, and local design temperatures. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Model Number | RACGYB240ADG000BACA0 |
|---|---|
| Product Type | Commercial Renaissance Classic Series Straight-Air (Cooling-Only) Packaged Air Conditioner |
| Nominal Capacity | 20 Tons — 240,000 BTU/h (228,000 BTU/h AHRI net cooling) |
| Rated Efficiency | 11.0 EER / 14.2 IEER |
| Refrigerant | R-454B (A2L, factory charged — approx. 196/204 oz (dual circuit)) |
| Compressors | Two Scroll Compressors, Two Stages, Dual Refrigerant Circuits |
| Nominal Airflow | 8,000 CFM — belt-drive supply fan with standard VFD, convertible downflow or horizontal |
| Electrical | 460V, 3-Phase, 60 Hz |
| Minimum Circuit Ampacity | 46 A |
| Max Overcurrent Protection | 50 A |
| Manufacturer Warranty | 5-Year Compressor / 1-Year Parts (Commercial) |
The RACGYB240ADG000BACA0 ships as one factory-assembled, wired, and run-tested cabinet with both refrigerant circuits charged with R-454B, so there is no field line set to braze — set it, connect power and ducting, and commission. For curbed rooftop installs, pair it with the matching 15–25 Ton Rheem 14 in. roof curb (RXKG-CBH14). Browse more Rheem equipment or the full packaged air conditioner lineup for related sizes and voltages.
Unit Features
Cooling, Compressors & Coils
- Two scroll compressors on independent refrigerant circuits providing two true stages of cooling
- Factory-charged with low-GWP R-454B refrigerant and factory-installed refrigerant leak detection with automatic mitigation
- Patented PlusOne SmartShield interlaced dual-circuit MicroChannel evaporator and condenser coils
- TXV refrigerant metering with a solid-core liquid-line filter drier on each circuit
- Rated 11.0 EER / 14.2 IEER at 240,000 BTU/h nominal (228,000 BTU/h AHRI net) cooling
- High- and low-pressure protection with built-in Smart Logic and internal compressor line-break overload
- Cooling operation to 125°F ambient; two-fan propeller condenser section
- Heavy galvanized cabinet with forkable base rails and a flexible footprint (unit net weight approx. 2,045 lb)
Airflow, Controls & Serviceability
- High-performance belt-drive supply fan delivering 8,000 nominal CFM
- Standard Variable Frequency Drive (VFD) supply-fan control — runs at half speed on first-stage/constant-fan for lower energy use, quieter operation, and up to 126% more moisture removal at low load (meets ASHRAE 90.1-2022 and CA Title 24)
- Field-convertible airflow — vertical downflow or horizontal side-flow
- PlusOne ServiceSmart access: Qwik-Slide blower assembly and Qwik-Clean drain pan; slide-out rack holds eight 20 x 24 x 2 in. filters
- PlusOne Diagnostics with dual 7-segment LED display, overflow condensate sensor, and external lockable gauge ports
- Ships wired and run-tested; MERV 8 and MERV 13 filters available as factory or field options
- 460V, 3-Phase, 60 Hz power: 46 A minimum circuit ampacity, 50 A maximum overcurrent protection, two compressors at 13.5 A RLA each
- Field- and factory-installed options include economizers, low-ambient control, hot-gas reheat, hinged access, smoke detectors, and two-stage 18–72 kW electric heat kits
Specifications & Manuals
Product documentation includes RACG series technical specifications, installation instructions, and warranty information to assist with equipment selection, installation, and service. This unit carries a Rheem limited warranty; see the warranty document above for full coverage terms and conditions.
Frequently Asked Questions
What size space will the RACGYB240ADG000BACA0 cool?
It is matched to large commercial cooling loads near 240,000 BTU/h (228,000 BTU/h AHRI net), which often lands around roughly 8,000 to 12,000 sq ft of commercial space. Because occupancy, ventilation, glazing, and internal heat gain move the real load, size it with an engineered commercial load calculation rather than floor area alone.
Why choose the 460V RACGYB240ADG000BACA0 over the 208/230V model?
On 460V, 3-Phase, 60 Hz this unit draws far less current — a 46 A minimum circuit ampacity and 50 A maximum overcurrent protection (two compressors at 13.5 A RLA each) — versus the 208/230V build. That eases feeder and breaker sizing where a 460V service supplies several large rooftops. If your panel is 208/230V, order the 208/230V three-phase 20-ton version instead.
Is this a two-stage unit with two compressors?
Yes. Every RACGYB unit uses two scroll compressors on independent refrigerant circuits for two true stages of cooling, and a Variable Frequency Drive (VFD) supply fan is standard. Running at first stage with the VFD at reduced speed improves part-load efficiency (IEER) and moisture removal.
Does the VFD supply fan come standard?
Yes. A VFD on the belt-drive supply fan is standard on every RACGYB model. It ramps the fan up smoothly, runs at roughly half speed during first-stage and constant-fan operation for major energy savings and lower noise, and meets ASHRAE 90.1-2022 and California Title 24 multi-speed fan requirements.
Can this rooftop unit be installed downflow and horizontal?
Yes. Airflow is field-convertible between vertical downflow (for curbed rooftop openings) and horizontal side-flow, and the flexible footprint supports a variety of roof curbs. A matching 14 in. Rheem roof curb (RXKG-CBH14) is available for 15–25 ton RACG units.
How is the 20-ton different from the 15-ton RACG unit?
The 20-ton delivers 228,000 BTU/h AHRI net cooling versus 172,000 for the 15-ton, moves 8,000 CFM versus 6,000, and carries a larger refrigerant charge, while keeping the same 11.0 EER / 14.2 IEER rating and two-compressor, two-stage design. Choose the size from an engineered load calculation for the zone.
RACGYB 15 to 25 Ton Straight Cool Package Installation ManualRACGYB 15 to 25 Ton Straight Cool Package Technical SpecificationsRheem Residential & Commercial Warranty 
