This is the outdoor condenser (outdoor unit) only for a single-zone ductless mini split heat pump. It's built for homeowners or installers who already have — or are separately sourcing — a matched indoor head, line set, and installation accessories, and who need the outdoor half of a Carrier Performance 26 system rated for 9,000 BTU/h cooling.
This 37MARAQ09AA3 outdoor condenser is the compressor half of a Carrier Performance 26 single-zone system, rated at 9,000 BTU/h cooling with a variable-speed (inverter-driven) compressor and Puron Advance (R-454B) refrigerant. It is AHRI-rated in combination with a specific matched indoor unit, as published in Carrier's performance tables — the indoor head is not included with this listing. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
System Components
- Outdoor Condenser Unit: Carrier 37MARAQ09AA3 (37MARA family, size 09K) — included in this listing.
- Indoor Unit: NOT included. Must be ordered separately and matched to an AHRI-certified pairing (compatible indoor architectures referenced in manufacturer tables include high-wall, one-way cassette, 4-way cassette, floor console, ceiling/floor, and slim duct styles).
Installation Requirements & Accessories
- Voltage: 208/230V; 1-Phase; 60Hz (this size-09 outdoor unit is not rated for 115V-only circuits).
- Minimum Circuit Ampacity (MCA): 12 A. Maximum Overcurrent Protection (MOP): 15 A.
- Liquid line: 1/4 in (6.35mm). Suction line: 3/8 in (9.52mm). Refrigerant charge: 2.03 lb (0.92 kg) factory charge, R-454B.
- Line Set Sold Separately — this listing does not include line set, wall sleeve, mounting bracket, or disconnect/whip.
- Not compatible with 115V-only circuits.
- Not a listed match for indoor units outside Carrier's published 37MARA/45MCCA/45MBCA/45MBFA/45MCFA/45MBDA/45MBAA AHRI-rated pairings — confirm exact matched indoor model number before purchase.
- Professional installation is required; R-454B (A2L) refrigerant handling requires EPA Section 608 certification.
Pro-Installer Tip
Flare connections on R-454B systems must be torqued to the manufacturer's specification and leak-checked before charging — an under-torqued or damaged flare is the most common cause of a slow refrigerant leak that shows up months later as reduced capacity or an outdoor unit fault code. Evacuate the line set and indoor coil with a vacuum pump and confirm the system holds vacuum before opening the service valves; this prevents moisture-related compressor damage and communication errors between indoor and outdoor boards. Use a calibrated digital torque wrench sized for the 1/4 in and 3/8 in flare nuts on this unit, and log the vacuum result per your standard practice. EPA Section 608 certification is required to handle R-454B refrigerant on this job — this is not an optional credential for A2L-rated equipment.
Key Benefits
- Variable-speed (inverter-driven) compressor for steadier temperature control versus single-speed compressors.
- Outdoor sound level as low as 52.5 dBA at this size.
- Puron Advance (R-454B) refrigerant, with lower global warming potential than legacy refrigerants.
- Compatible with multiple indoor unit architectures (high-wall, cassette, floor console, slim duct) when AHRI-matched.
- Rated heating operation down to -13°F ambient, per manufacturer operating range data.
| Spec | Value | Unit |
|---|---|---|
| Cooling Rated Capacity | 9000 | BTU/h |
| Heating Rated Capacity | 10000 | BTU/h |
| SEER2 | [NEEDS VERIFICATION] | — |
| HSPF2 | [NEEDS VERIFICATION] | — |
| Voltage | 208/230;1;60 | V;Ph;Hz |
| Minimum Circuit Ampacity (MCA) | 12 | A |
| Maximum Overcurrent Protection (MOP) | 15 | A |
| Outdoor Sound Level | 52.5 | dBA |
| Refrigerant Type | R-454B | — |
| Refrigerant Charge | 2.03 (0.92) | lb (kg) |
| Liquid Pipe Size | 1/4 (6.35) | in (mm) |
| Suction Pipe Size | 3/8 (9.52) | in (mm) |
| Net Weight | 62.17 | lb |
| Gross Weight | 67.68 | lb |
| Cooling Operating Range | -13 to 122 (-25 to 50) | °F (°C) |
| Heating Operating Range | -13 to 75 (-25 to 24) | °F (°C) |
| Compressor Type | Variable-Speed (Inverter Driven) | — |
| Zone Count | 1 | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matches with an indoor unit rated for the same size-09 capacity class in Carrier's published AHRI tables (multiple indoor architectures listed by the manufacturer, including high-wall, one-way cassette, 4-way cassette, floor console, and slim duct).
- Runs on a dedicated 208/230V; 1-Phase; 60Hz circuit.
- Not compatible with 115V-only circuits or with indoor units outside Carrier's published matched pairings for this outdoor size.
- Line set, wall sleeve, mounting bracket, and disconnect/whip are NOT included and must be purchased separately, sized to the 1/4 in liquid / 3/8 in suction connections listed above.
- This listing is the outdoor condenser only — it is not sold as a complete system, wall-mounted unit, cassette, or ducted kit.
FAQ
What breaker size do I need for this system?
For the 37MARAQ09AA3 outdoor unit, the manufacturer data lists a Minimum Circuit Ampacity (MCA) of 18 A and a Maximum Overcurrent Protection (MOP) of 20 A for this size/model row. Note: source table groups size-09 with size-12 (115V) figures — confirm the exact row for your model with a licensed electrician before wiring, and always follow the manufacturer's electrical data table and NEC/local code.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY kit. It uses R-454B (A2L) refrigerant and requires professional installation. Carrier's Consumer Choice Warranty offers a 10-year parts-only limited warranty, or a 5-year parts plus 3-year labor limited warranty, upon timely registration on eligible equipment.
Is the line set included, and if not, what size do I need to buy?
No, the line set is not included. This listing is the outdoor condenser only. For this size-09 model, the manufacturer specifies a 1/4 in (6.35mm) liquid line and a 3/8 in (9.52mm) suction line.
Which indoor unit does this outdoor condenser match?
This outdoor unit (37MARAQ09AA3) is AHRI-rated with a matched indoor unit in Carrier's published tables — for example, with an indoor unit such as 615AHAQ09XA3 in one configuration, or with cassette/floor console/slim duct indoor models named alongside it in other rated pairings. Confirm the exact matched indoor model number with a Carrier dealer before ordering, since Carrier publishes multiple valid indoor pairings for this outdoor size.
Does this system work in cold climates (low-ambient heating)?
Manufacturer data lists a heating operating range of -13°F to 75°F (-25°C to 24°C) and a cooling operating range of -13°F to 122°F (-25°C to 50°C) for the 37MARA family.
Compliance & Warranty
This outdoor unit uses R-454B (A2L classified) refrigerant. Installation by a licensed HVAC professional is required to maintain warranty. EPA Section 608 certification is required for anyone handling refrigerant on this system. Upon timely registration on eligible equipment, Carrier's Consumer Choice Warranty offers either a 10-year parts-only limited warranty, or a 5-year parts plus 3-year labor limited warranty. See the manufacturer warranty documentation in the Resources tab for full terms and registration requirements.
