Carrier 26SCA4 Comfort™ Series Single-Stage Air Conditioner
Product Data
This unit is designed utilizing Carrier's non-ozone depleting, low global warming potential Puron Advance™ refrigerant. These air conditioners offer a collection of features unmatched by other equipment families.
Note: Ratings are subject to change. Refer to the AHRI directory for the most up-to-date ratings information.
Key Features & Benefits
- Efficiency: 13.4 - 16.0 SEER2 / 11.0 – 13.5 EER2, Microtube Technology refrigeration system, Indoor air quality accessories available.
- Comfort: Supports programmable or standard thermostat controls.
- Reliability: Uses non-ozone depleting, low global warming potential Puron Advance™ refrigerant; features a scroll compressor, internal pressure relief valve, internal thermal overload, and filter drier.
- Durability: WeatherArmor™ Protection Package includes solid, durable sheet metal construction and a dense wire coil guard.
- Applications: Suitable for long-line applications (up to 250 ft total equivalent length) and low ambient cooling down to 0°F (-18°C) with approved accessory kits.
Limited Warranty
Offers a 5-year parts limited warranty (including compressor and coil). A 10-year parts limited warranty (including compressor and coil) is available with timely registration*.
* Equipment must be registered within 90 days of original installation, except in jurisdictions where warranty benefits cannot be conditioned on registration. Applies to original purchaser/homeowner.
Model Number Nomenclature
The model number (e.g., 26SCA418N003) indicates key specifications:
| Field | Description |
|---|---|
| 1-4 (26SCA4) | Series and Type (Comfort™ Series, Single-Stage) |
| 5 (18) | Nominal Cooling Capacity (e.g., 18 = 18,000 BTUH / 1.5 Tons) |
| 6-12 (N003) | Configuration details (Refrigerant Type, Tier, Region, Features, Voltage, etc.) |
Catalog Ordering Numbers
| Size (Tons) | Model Number |
|---|---|
| 1.5 | 26SCA418N003 |
| 2 | 26SCA424N003 |
| 2.5 | 26SCA430N003 |
| 3 | 26SCA436N003, 26SCA436N005, 26SCA436N006, 26SCA436N001 |
| 3.5 | 26SCA442N003 |
| 4 | 26SCA448N013, 26SCA448N005, 26SCA448N006, 26SCA448N001 |
| 5 | 26SCA460N003, 26SCA460N005, 26SCA460N006, 26SCA460N001 |
Standard Features & Physical Data
The 26SCA4 series offers features like Puron Advance™ Refrigerant, Scroll Compressor, Filter Drier, Front Seating Service Valves, Internal Pressure Relief Valve, Internal Thermal Overload, and Long Line Capability across various unit sizes (18-60). Physical data includes compressor type (Scroll), refrigerant (Puron Advance™ R-454B), factory charge, condenser fan details, and condenser coil dimensions.
Refrigerant Piping & Charging
Tables provide maximum total equivalent lengths for refrigerant lines based on liquid line diameter and vertical separation for both outdoor-below-indoor and outdoor-above-indoor configurations. A charging formula is provided to adjust refrigerant charge based on lineset length and diameter. Long line applications (exceeding 80 ft equivalent length or 35 ft vertical separation) may require specific accessories and system modifications.
Accessories
Various accessories are available to enhance performance and application suitability, including:
- Freeze Therm Kit (KSAFT0101AAA)
- Time Delay Kits (KAATD0101TDR, KAATD0201TDR)
- Low Ambient Cooling Kit (KSALA0301410)
- MotorMaster® Control (KSALA1001AAA)
- Hard Start Kits (KSAHS2501AAA, KSAHS2701AAA)
- Sound Blanket Kits (KSASH2301COP, KSASH2401COP)
- And others for specific functions like winter start, low/high pressure switches, etc.
Accessory Usage Guidelines
Accessories are recommended or required for specific applications:
- Low-Ambient Cooling: Crankcase Heater, Evaporator Freeze Thermostat, Low-Ambient Pressure Switch or MotorMaster® Controller are often required when operating below 55°F (12.8°C).
- Long Line Applications: Crankcase Heater and Compressor Start Assist are often required.
- Sea Coast Applications: Hard Shut-Off TXV and Liquid Line Solenoid Valve may be recommended.
Electrical Data
Electrical specifications vary by unit size and voltage configuration (single-phase 208/230V, three-phase 208/230V, 460V, 575V). Data includes operating voltage, LRA, RLA, FLA, MCA, and maximum fuse or circuit breaker amperage ratings.
Sound Power Data
A-Weighted Sound Power (dBA) data is provided in octave bands, both without and with an accessory sound shield, allowing for noise level assessment.
Detailed Capacities & Ratings
Extensive tables detail cooling capacities (Total and Sensible) and system kW for various indoor and outdoor operating conditions (temperatures, humidity) and unit sizes. Condenser-only ratings are also provided. These detailed performance tables are available in the full product documentation.
Guide Specifications
The unit is described as an outdoor-mounted, air-cooled, split-system air conditioner suitable for ground or rooftop installation. Key specifications include compliance with AHRI and UL standards, construction materials (galvanized steel cabinet), compressor type (hermetic), condenser coil construction (aluminum fins bonded to copper/aluminum tubes), and use of Puron Advance™ (R-454B) refrigerant.
System Design Summary
The unit is intended for outdoor installation with free air inlet and outlet. Minimum outdoor operating temperature without low-ambient accessories is 55°F (12.8°C), with a maximum of 115°F (46.1°C). The unit must be level for reliable operation. For long refrigerant tube runs or significant vertical differentials, consult specific guidelines. Only copper wire is acceptable for electrical connections at the unit.
