This is the outdoor condenser (outdoor unit) only for a Carrier Infinity 35 single-zone ductless heat pump system. It's built for homeowners or contractors who already have a matched indoor head selected, or who are replacing an existing 37MPRA outdoor unit — the indoor unit, line set, and mounting accessories are sold separately.
The Carrier Infinity 35 outdoor unit is ENERGY STAR® certified and rated for AHRI-matched single-zone systems, paired here with a factory-specified indoor unit (615PHAQ06XA3 per Carrier's engineering documentation) to achieve the published 35.1 SEER2 rating. This unit uses a variable-speed inverter-driven compressor and Puron Advance™ (R-454B) refrigerant. 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: Carrier Infinity 35, model 37MPRAQ06AA3 (family 37MPRA, size 06K), variable-speed rotary compressor, single-zone configuration
- Indoor unit: NOT included in this listing — must be purchased separately (matched AHRI combination uses indoor model 615PHAQ06XA3 per manufacturer documentation)
Installation Requirements & Accessories
- Voltage: 208/230V, single-phase, 60Hz — dedicated circuit required
- Minimum Circuit Ampacity (MCA): 16A; Maximum Overcurrent Protection (MOP): 20A
- Line set required: 1/4 in liquid line, 3/8 in suction line; standard length 24.6 ft, minimum 9.8 ft, maximum total 82.02 ft — Line Set Sold Separately
- Refrigerant: R-454B (A2L mildly flammable classification) — professional handling required
- Professional installation required — this is not a DIY / pre-charged quick-connect system
- Not compatible with 115V-only circuits
- Not included: indoor unit, line set, wall sleeve/mounting bracket, communication wiring, and disconnect/whip
- Not a listed match for indoor units outside the AHRI-certified 37MPRA family combinations
Pro-Installer Tip
Flare connections on R-454B systems must be torqued to spec and leak-checked before the system is opened to atmosphere — a loose or improperly-flared joint on the 1/4 in liquid line is the most common source of slow refrigerant loss and nuisance low-charge faults on 06K-class outdoor units. Use a calibrated digital torque wrench when making liquid and suction line flares, and confirm micron level before charging to prevent moisture-related compressor damage and repeat callbacks. Because R-454B is an A2L mildly flammable refrigerant, EPA Section 608 certification is required for anyone handling, recovering, or charging this refrigerant, and proper brazing/torquing practice directly supports the unit's rated 35.1 SEER2 efficiency by preventing charge loss over time.
Key Benefits
- Variable-speed inverter-driven compressor for steady, load-matched comfort rather than on/off cycling
- Outdoor sound level as low as 57 dBA
- Heating capacity maintained at low outdoor temperatures: 11,000 Btu/h at 17°F and 13,500 Btu/h at 5°F
- Puron Advance™ (R-454B) refrigerant with lower global warming potential than legacy refrigerants
- ENERGY STAR® certified for cooling and heating efficiency
- Crankcase heater standard on all unit sizes for cold-weather compressor protection
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Rated Capacity (DOE A2 - 95°F) | 6000 | Btu/h |
| SEER2 | 35.1 | Btu/h.W |
| EER2 (DOE A2 - 95°F) | 17.5 | Btu/h.W |
| EER2 (DOE B2 - 82°F) | 25.8 | Btu/h.W |
| Heating Rated Capacity (DOE H12 - 47°F) | 9000 | Btu/h |
| Heating Rated Capacity (DOE H32 - 17°F) | 11000 | Btu/h |
| Heating Rated Capacity (DOE H42 - 5°F) | 13500 | Btu/h |
| HSPF2 | [NEEDS VERIFICATION] | Btu/h.W |
| Voltage | 208/230 | V |
| Phase / Frequency | 1-Phase, 60 | Hz |
| Minimum Circuit Ampacity (MCA) | 16 | A |
| Maximum Overcurrent Protection (MOP) | 20 | A |
| Outdoor Sound Level | 57 | dBA |
| Refrigerant Type | R-454B | — |
| Liquid Pipe Size | 1/4 | in |
| Suction Pipe Size | 3/8 | in |
| Minimum Piping Length | 9.8 | ft |
| Standard Piping Length | 24.6 | ft |
| Maximum Total Piping Length | 82.02 | ft |
| Net Weight | 99.65 | lbs |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- This listing is the outdoor condenser only — it requires a matched Carrier 37MPRA-family indoor unit (documented AHRI match: indoor model 615PHAQ06XA3) to form a complete system
- Requires a dedicated 208/230V, single-phase, 60Hz electrical circuit
- Not compatible with 115V-only circuits
- Line set, wall sleeve/mounting bracket, and indoor unit are NOT included and must be purchased separately
- Not a verified match for indoor units outside the Carrier 37MPRA/615PHAQ matched family — do not pair with unlisted indoor model numbers
FAQ
What breaker size do I need for this system?
The 37MPRAQ06AA3 outdoor unit has a Minimum Circuit Ampacity (MCA) of 16A and a Maximum Overcurrent Protection (MOP) rating of 20A on a dedicated 208/230V, single-phase, 60Hz circuit.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY kit. This unit uses R-454B refrigerant (an A2L mildly flammable classification) and requires professional installation by a licensed HVAC technician to maintain the manufacturer's warranty.
Is the line set included, and if not, what size do I need to buy?
The line set is not included and is sold separately. This outdoor unit requires a 1/4 inch liquid line and a 3/8 inch suction line. Standard piping length is 24.6 ft, minimum piping length is 9.8 ft, and maximum total piping length is 82.02 ft.
Does this system work in cold climates (low-ambient heating)?
Per Carrier's published family overview, the Infinity 35 platform delivers heating down to -22°F. At the rated 17°F test point (DOE H32), this specific outdoor unit (37MPRAQ06AA3) produces 11,000 Btu/h; at 5°F (DOE H42) it produces 13,500 Btu/h.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This unit uses R-454B (A2L mildly flammable) refrigerant; installation, charging, and service must be performed by an EPA Section 608 certified technician. Per Carrier's Consumer Choice Warranty, upon timely registration on eligible equipment, buyers may select either a 10-year parts-only limited warranty or a 5-year parts plus 3-year labor limited warranty. Warranty terms are set by Carrier; refer to the manufacturer warranty documentation in the Resources tab for full eligibility conditions.
