MRCOOL — Signature Series Split System (Air Handler + Cooling-Only Condenser)
MRCOOL® Signature Series 18K (1.5 Ton) Split AC System — MCAEAMPSF18C21AA + MCAESAS4T1821AA
Overview
18K Class1.5 TonUp to 14.3 SEER211.7 EER2R-454BCooling OnlyMulti-Position Air HandlerUpflow / Downflow / HorizontalAHRI Certified10-Year Parts Warranty
ThisMRCOOL® Signature Series 18K split systempairs amulti-position air handlerwith acooling-only condenserfor dependable comfort and straightforward installation. Both components useR-454B refrigerantfor a modern, lower-impact refrigerant platform. The air handler supportsupflow, downflow, and horizontalconfigurations for flexible placement in closets, attics, and crawl spaces, while the condenser delivers efficient, quiet cooling for residential applications.
Highlights
- Flexible installation:Multi-position air handler supportsupflow, downflow, and horizontalconfigurations.
- Efficient cooling:Condenser ratedup to 14.3 SEER2and11.7 EER2.
- Modern refrigerant:R-454Brefrigerant platform.
- Durable construction:Galvanized steel cabinet and copper “A” coils with high-efficiency aluminum fins.
- Quiet outdoor operation:Outdoor unit listed at60 dB(A).
System Size
1.5 Ton (18K Class)
1.5 Ton (18K Class)
Efficiency
Up to 14.3 SEER2
Up to 14.3 SEER2
Line Sizes
3/8" Liquid • 3/4" Suction
3/8" Liquid • 3/4" Suction
Max Line Set
100 ft
100 ft
Sizing and performance depend on installation, duct design, and load. Manual J sizing is recommended.
What’s Included
- Multi-Position Air Handler:MCAEAMPSF18C21AA
- Cooling-Only Condenser:MCAESAS4T1821AA
- Documentation (see Documents & Downloads)
Indoor Specs
Model:MCAEAMPSF18C21AA (Signature Series Multi-Position Air Handler)
| Unit Type | Air Handler |
| Configuration / Mount | Multi-Position (Upflow / Downflow / Horizontal) |
| Tonnage | 1.5 Ton |
| Airflow (CFM) | 749 |
| 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 | 1/4 HP • 3 Speeds • 830 RPM |
| Filter | Replaceable • 18" × 21" × 1" |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 2.1A |
| Max Fuse / Breaker | 3A |
| Aux Heat | Not included • Optional heat kit available (5 kW, 7.5 kW) |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 19.625" × 22" × 45.75" |
| Net Weight | 120 lb |
| GTIN / UPC | GTIN 00840255595841 • UPC 840255595841 |
| Proposition 65 | Yes |
This air handler is designed to work withSignature Series top discharge condensersand supports most third-party thermostats.
Outdoor Specs
Model:MCAESAS4T1821AA (Signature Series Split System AC Condenser — Cooling Only)
| Unit Type | Split System AC Condenser (Cooling Only) |
| Tonnage | 1.5 Ton |
| Cooling Capacity | 17,000 BTU |
| Efficiency | 14.3 SEER2 • 11.7 EER2 |
| Airflow (CFM) | 1950 |
| Sound | 60 dB(A) |
| Inverter | No |
| Min Ambient Cooling | 59°F |
| Refrigerant | R-454B • 74 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) | 12.2A |
| 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 | 132 lb |
| GTIN / UPC | GTIN 00840255595711 • UPC 840255595711 |
| Proposition 65 | Yes |
This condenser is designed to work withSignature Series Multi-PositionorStud Mountair handlers.
Documents & Downloads
- Signature Series Multi-Position Air Handler (MCAEAMPSF18C21AA)
- Brochure (EN)
- Installation & User Manual (EN)
- Warranty (EN)
- Signature Series Cooling-Only Condenser (MCAESAS4T1821AA)
- Brochure (EN)
- Installation & User Manual (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
Important
- Matched system:Air handler and condenser should be paired per approved combinations for rated performance and certification.
- Line sizes:Listed as3/8" liquidand3/4" suction; confirm sizing and routing requirements in the installation manual.
- Electrical:Both units are208/230V, 1-phase, 60 Hz. Verify breaker/fuse sizing per installation manual and local code.
- Air handler orientation:Supportsupflow, downflow, and horizontalinstallation—ensure condensate management is configured correctly for the chosen position.
- Optional heat:Air handler supports optional electric heat kits (5 kW,7.5 kW) when additional heat is desired.
FAQs
Is this a heat pump system?
No. The outdoor unit listed here is acooling-onlycondenser. Heating would require a compatible heat source (such as an optional electric heat kit in the air handler) or a different outdoor unit.
What installation positions does the air handler support?
The air handler ismulti-positionand supportsupflow, downflow, and horizontalconfigurations.
What are the refrigerant and line sizes?
Refrigerant is listed asR-454B. Line sizes are listed as3/8" liquidand3/4" suction.
What is the maximum line set length?
The condenser lists a maximum line set length of100 ft.
What warranty coverage is included?
Warranty is listed as a10-year limited parts warranty, withlimited compressor warrantycoverage referenced for the outdoor unit.
