Armstrong Air 4 Tons Gas Heat Upflow Air Conditioner System - 16 SEER - 4SCU16LS148P / A80US2V090C20 / 1.841226
ARMSTRONG AIR 4SCU16LS148P - 4.0 Ton 16 SEER 2 Stg Condensing Unit (4SCU16LS148P)ARMSTRONG AIR A80US2V090C20 - 3.5-5 Ton 88 MBH 80% 2 Stage Furnace Variable Speed ECM Motor 21.0 Inches Width x 33 Inches Height (A80US2V090C20)ARMSTRONG AIR 1.841226 - Comfort Sync A3 Ultra-Smart Communicating WiFi Thermostat (1.841226)
Features
- 4.0 Ton 16 SEER 2 Stg Condensing Unit
- 29.38 Inches Width x 31.25 Inches Depth
- 3/8LL 7/8SL
- 45A MOCP
- 200 Lbs
- 3.5-5 Ton 88 MBH 80% 2 Stage Furnace Variable Speed ECM Motor 21.0 Inches Width x 33 Inches Height
- 159 Lbs
- Comfort Sync A3 Ultra-Smart Communicating WiFi Thermostat
- 7 in. HD LCD Display
- 2 Lbs
What our Experts Think
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Two-stage cooling: The 4SCU16LS148P condensing unit uses a two-stage scroll compressor, providing gentle low-speed operation during mild conditions and full power when needed.
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Durable coil design: MHT™ technology with rifled tubing and lanced fins ensures efficient heat transfer and long-term refrigerant performance.
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Quiet operation: Heavy-duty sound blanket and baked-polyester steel cabinet reduce noise even at high output.
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Reliable gas furnace pairing: The A80US2V090C20 is an 80% AFUE, two-stage upflow/horizontal furnace with a variable-speed ECM blower for better humidity and temperature control.
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Even, consistent comfort: Variable-speed fan and two-stage burner enable longer, more consistent run cycles with reduced cycling.
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Service-friendly: External gauge ports and corner-mounted controls simplify diagnostics and maintenance.
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Smart system compatibility: Works with Pro Series setups and communicating thermostats for remote control and system diagnostics.
Q&A
Q: What components are included in this system?
A: A 4‑ton two-stage outdoor air conditioner (4SCU16LS148P), a 2-stage, variable-speed gas furnace (A80US2V090C20), and a compatible indoor coil/unit (1.841226).
Q: What is the cooling efficiency?
A: Up to 16 SEER, with a two-stage scroll compressor for improved energy efficiency.
Q: What refrigerant is used in the outdoor unit?
A: R‑410A.
Q: What are the gas furnace specifications?
A: Two-stage, variable-speed furnace with 80% AFUE, 88,000 BTU/hr input, and 70,000 BTU/hr output.
Q: What type of blower motor does the furnace use?
A: ECM variable-speed motor for smoother airflow, improved humidity control, and quieter operation.
Q: What installation orientations does the furnace support?
A: Upflow or horizontal.
Q: What comfort and performance benefits does the system offer?
A: Two-stage cooling for energy efficiency in mild weather, variable-speed furnace for better airflow and humidity management, and integrated safety features to protect the compressor.
Maintenance Tips
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Turn off power before performing any maintenance.
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Replace or clean the air filter every 1–3 months to maintain airflow and system efficiency.
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Keep the outdoor unit clear of debris and vegetation; maintain at least 2 ft of clearance.
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Clean the outdoor condenser coil and indoor evaporator coil annually to maintain heat exchange efficiency.
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Flush and clean the condensate drain line and pan regularly to prevent clogs and water damage.
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Check all electrical connections for tightness, wear, or corrosion.
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Ensure the thermostat is functioning properly and calibrated.
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Schedule professional maintenance twice a year (spring and fall) to inspect refrigerant, blower, coils, and safety components.
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Keep a maintenance log of filter changes, inspections, and service visits to track system health and preserve warranty.
