MRCOOL® Signature Series 24K (2 Ton) Heat Pump System — MCAEAMPSF24C21AA + MCAESHS4T2421AA
Overview
The MRCOOL® Signature Series 24K heat pump system pairs a multi-position air handler with a split-system heat pump condenser for year-round heating and cooling. The air handler supports upflow, downflow, and horizontal installations for flexible placement, and both components use R-454B refrigerant.
Highlights
- Year-round comfort: Heat pump provides heating + cooling from one outdoor unit.
- Efficient ratings: Outdoor unit listed at 14.3 SEER2, 11.7 EER2, and 7.5 HSPF2.
- Flexible install: Air handler supports upflow, downflow, and horizontal configurations.
- Modern refrigerant: System uses R-454B.
- Cold-weather note: Outdoor unit lists 5°F minimum ambient heating operation.
2 Ton (24K Class)
14.3 SEER2 • 7.5 HSPF2
3/8" Liquid • 3/4" Suction
59°F Cool • 5°F Heat
Performance varies by climate and installation. Manual J sizing is recommended.
What’s Included
- Multi-Position Air Handler: MCAEAMPSF24C21AA
- Heat Pump Condenser: MCAESHS4T2421AA
- Documentation (see Documents & Downloads)
Indoor Specs
Model: MCAEAMPSF24C21AA (Signature Series Multi-Position Air Handler)
| Unit Type | Air Handler |
| Configuration / Mount | Multi-Position (Upflow / Downflow / Horizontal) |
| Tonnage | 2 Ton |
| Airflow (CFM) | 761 |
| Sound | 53 dB(A) |
| Refrigerant | R-454B |
| Metering Device | Orifice |
| Drain Connection Size | 3/4" |
| Line Sizes | Liquid 3/8" • Suction 3/4" |
| Blower Motor Type | PSC |
| Blower Motor | 1/3 HP • 3 Speeds • 910 RPM |
| Filter | Replaceable • 18" × 21" × 1" |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 2.4A |
| Max Fuse / Breaker | 3A |
| Aux Heat | Not included • Optional heat kit available (5 kW, 7.5 kW, 10 kW) |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 19.625" × 22" × 45.75" |
| Net Weight | 128 lb |
| GTIN / UPC | GTIN 00840255595858 • UPC 840255595858 |
| Proposition 65 | Yes |
Designed to work with Signature Series top discharge condensers.
Outdoor Specs
Model: MCAESHS4T2421AA (Signature Series Split System Heat Pump Condenser)
| Unit Type | Split System Heat Pump Condenser |
| Tonnage | 2 Ton |
| Cooling / Heating Capacity | 22,000 BTU / 22,000 BTU |
| Efficiency | 14.3 SEER2 • 11.7 EER2 • 7.5 HSPF2 |
| Airflow (CFM) | 1950 |
| Sound | 60 dB(A) |
| Inverter | No |
| Min Ambient (Cooling) | 59°F |
| Min Ambient (Heating) | 5°F |
| Refrigerant | R-454B • 91.7 oz |
| Max Line Set Length | 100 ft |
| Line Sizes | Liquid 3/8" • Suction 3/4" |
| Compressor | Scroll |
| Condenser Fan Motor | PSC • 1/9 HP |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 15.2A |
| Max Fuse / Breaker | 20A |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 23.6" × 23.6" × 25" |
| Net Weight | 144 lb |
| GTIN / UPC | GTIN 00840255595780 • UPC 840255595780 |
| Proposition 65 | Yes |
Designed to work with Signature Series Multi-Position or Stud Mount air handlers.
Documents & Downloads
- Signature Series Multi-Position Air Handler (MCAEAMPSF24C21AA)
- Signature Series Heat Pump Condenser (MCAESHS4T2421AA)
Important
- Heat pump operation: This pairing includes a heat pump condenser for heating + cooling.
- Minimum outdoor temps: Outdoor unit lists 59°F minimum ambient for cooling and 5°F minimum ambient for heating.
- Line sizes: Listed as 3/8" liquid and 3/4" suction; confirm routing and any long-line requirements in the installation manual.
- Line set length: Outdoor unit lists up to 100 ft maximum line set length; verify long-line accessories/requirements in the install manual.
- Electrical: Both components are 208/230V, 1-phase, 60 Hz. Verify breaker/fuse sizing per install manual and local code.
- Aux heat option: Air handler supports optional heat kits (listed as 5 kW, 7.5 kW, and 10 kW) for added cold-weather comfort (sold separately).
FAQs
Does this system provide heating and cooling?
Yes. The outdoor unit is a heat pump condenser, so the system is listed for both heating and cooling.
What installation positions does the air handler support?
The air handler is multi-position and supports upflow, downflow, and horizontal configurations.
What refrigerant and line sizes does it use?
Refrigerant is listed as R-454B. Line sizes are 3/8" liquid and 3/4" suction.
How cold can it run in heating?
The outdoor unit lists a minimum ambient heating temperature of 5°F.
What warranty coverage is included?
Warranty is listed as 10-year limited parts, with limited lifetime compressor coverage referenced for the outdoor unit.
