MRCOOL® Signature Series 48K (4 Ton) Split AC System — MCAEAMPEF48E21AA + MCAESAS4T4821AA
Overview
The MRCOOL® Signature Series 48K split system combines a multi-position air handler with a cooling-only condenser for high-capacity residential cooling. This pairing is designed for flexible installs (upflow, downflow, or horizontal) and uses R-454B refrigerant across the system. Note the larger 7/8" suction line on this 4-ton class setup.
Highlights
- Multi-position install: Air handler supports upflow, downflow, and horizontal configurations.
- ECM airflow performance: Air handler uses a high-efficiency ECM blower (5 speeds) for strong, steady airflow.
- High-capacity cooling: Condenser rated 4 ton with 45,000 BTU listed cooling capacity.
- Modern refrigerant: System uses R-454B.
- Long-line capable: Condenser lists up to 150 ft maximum line set length.
4 Ton (48K Class)
Up to 13.8 SEER2
3/8" Liquid • 7/8" Suction
150 ft
Sizing and performance depend on installation, duct design, and load. Manual J sizing is recommended.
What’s Included
- Multi-Position Air Handler: MCAEAMPEF48E21AA
- Cooling-Only Condenser: MCAESAS4T4821AA
- Documentation (see Documents & Downloads)
Indoor Specs
Model: MCAEAMPEF48E21AA (Signature Series Multi-Position Air Handler)
| Unit Type | Air Handler |
| Configuration / Mount | Multi-Position (Upflow / Downflow / Horizontal) |
| Tonnage | 4 Ton |
| Airflow (CFM) | 1549 |
| Sound | 57 dB(A) |
| Refrigerant | R-454B |
| Metering Device | Orifice |
| Drain Connection Size | 3/4" |
| Line Sizes | Liquid 3/8" • Suction 7/8" |
| Blower Motor Type | ECM |
| Blower Motor | 3/4 HP • 5 Speeds • 1010 RPM |
| Filter | Replaceable • 20" × 24" × 1" |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 7.2A |
| Max Fuse / Breaker | 10A |
| 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) | 22" × 24.5" × 53.125" |
| Net Weight | 163 lb |
| GTIN / UPC | GTIN 00840255595896 • UPC 840255595896 |
| Proposition 65 | Yes |
Designed to work with Signature Series top discharge condensers and most third-party thermostats.
Outdoor Specs
Model: MCAESAS4T4821AA (Signature Series Split System AC Condenser — Cooling Only)
| Unit Type | Split System AC Condenser (Cooling Only) |
| Tonnage | 4 Ton |
| Cooling Capacity | 45,000 BTU |
| Efficiency | 13.8 SEER2 • 11.2 EER2 |
| Airflow (CFM) | 4000 |
| Sound | 65 dB(A) |
| Inverter | No |
| Min Ambient Cooling | 59°F |
| Refrigerant | R-454B • 116.4 oz |
| Max Line Set Length | 150 ft |
| Line Sizes | Liquid 3/8" • Suction 7/8" |
| Compressor | Scroll |
| Condenser Fan Motor | PSC • 1/3 HP |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 30A |
| Max Fuse / Breaker | 50A |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 29.14" × 29.14" × 32.875" |
| Net Weight | 204 lb |
| GTIN / UPC | GTIN 00840255595759 • UPC 840255595759 |
| Proposition 65 | Yes |
Designed to work with Signature Series Multi-Position or Stud Mount air handlers.
Documents & Downloads
- Signature Series Multi-Position Air Handler (MCAEAMPEF48E21AA)
- Brochure (EN)
- Installation & User Manual (EN)
- Warranty (EN)
- Signature Series Cooling-Only Condenser (MCAESAS4T4821AA)
- Brochure (EN)
- Installation & User Manual (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
Important
- Cooling-only outdoor unit: This condenser is listed as cooling only. If you need heating via outdoor equipment, select a compatible heat pump condenser instead.
- Line sizes: Listed as 3/8" liquid and 7/8" suction; confirm routing and any long-line requirements in the installation manual.
- Line set length: Condenser lists up to 150 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.
- Air handler orientation: Supports upflow, downflow, and horizontal installation; configure condensate management for the selected position.
- Optional heat kits: Supported sizes listed as 5 kW, 7.5 kW, and 10 kW (sold separately).
FAQs
Is this a heat pump system?
No. The outdoor unit in this pairing is a cooling-only condenser. Heating requires a different outdoor unit (heat pump) or an indoor heat source such as an optional electric heat kit.
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 7/8" suction.
What is the maximum line set length?
The condenser lists a maximum line set length of 150 ft.
What warranty coverage is included?
Warranty is listed as 10-year limited parts, with limited lifetime compressor coverage referenced for the outdoor unit.
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We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
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