The MRCOOL Signature Series air conditioner condenser is a single-stage, cooling-only outdoor unit with a scroll compressor and a factory charge of R-454B, in seven sizes from 1.5 to 5 tons. It is rated up to 14.3 SEER2 and 11.7 EER2 (13.8 SEER2 and 11.2 EER2 on the 4 and 5-ton) when matched to a Signature air handler of the same capacity.
It suits a straightforward central air replacement where heating is handled separately. Pair the 1.5 to 3-ton sizes with the Signature multi-position or stud-mount air handler, and the 3.5 to 5-ton sizes with the multi-position model. Installation is by a licensed HVAC contractor.
Features
Matched Signature Pairing
AHRI-rated with the Signature multi-position air handler at every size, and with the stud-mount air handler from 1.5 to 3 tons.
Scroll Compressor
A single-stage scroll compressor with inner-groove copper tubing in the coil.
Factory Charged With R-454B
Ships holding enough low-GWP R-454B for a 25' line set.
Steel Louver Coil Guard
Louvered steel panels shield the coil, and temperature and pressure sensors protect the system.
Quiet Outdoor Operation
Rated sound levels run from 60 dBA on the 1.5 and 2-ton to 65 dBA on the largest sizes.
Long Line Runs
Up to 100' of line on the 1.5 to 2.5-ton models and 150' on the 3 to 5-ton models.
Specifications
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Voltage: 208/230V
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Phase: 1
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Frequency: 60 Hz
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Refrigerant: R-454B
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Cooling Operating Range (outdoor, low): 59°F
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Liquid Line: 3/8"
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Compressor: Scroll
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Inverter: No
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ENERGY STAR: No
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AHRI Certified: Yes
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UL Listed: Yes
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ETL Listed: Yes
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CSA Listed: Yes
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Color: Grey
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Capacity Option: Nominal size; rated cooling capacity is listed per size
18,000 BTU
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Model: MCAESAS4T1821AA
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Cooling Capacity: 17,000 BTU/h
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Nominal Tonnage: 1.5 ton
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SEER2: 14.3
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EER2: 11.7
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Minimum Circuit Ampacity: 12.2 A
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Max Fuse / Breaker: 20 A
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Refrigerant Charge: 74 oz
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Sound Level: 60 dBA
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Airflow: 1,950 CFM
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Max Line Set Length: 100'
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Suction Line: 3/4"
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Works With: Signature Series Multi-Position or Stud Mount Air Handler (same capacity)
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Dimensions: 23.6"W x 23.6"D x 25"H
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Weight: 132 lbs
24,000 BTU
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Model: MCAESAS4T2421AA
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Cooling Capacity: 22,000 BTU/h
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Nominal Tonnage: 2 ton
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SEER2: 14.3
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EER2: 11.7
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Minimum Circuit Ampacity: 15.2 A
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Max Fuse / Breaker: 20 A
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Refrigerant Charge: 79.3 oz
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Sound Level: 60 dBA
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Airflow: 1,950 CFM
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Max Line Set Length: 100'
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Suction Line: 3/4"
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Works With: Signature Series Multi-Position or Stud Mount Air Handler (same capacity)
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Dimensions: 23.6"W x 23.6"D x 25"H
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Weight: 133 lbs
30,000 BTU
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Model: MCAESAS4T3021AA
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Cooling Capacity: 27,500 BTU/h
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Nominal Tonnage: 2.5 ton
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SEER2: 14.3
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EER2: 11.7
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Minimum Circuit Ampacity: 18 A
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Max Fuse / Breaker: 30 A
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Refrigerant Charge: 81.1 oz
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Sound Level: 63 dBA
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Airflow: 2,200 CFM
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Max Line Set Length: 100'
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Suction Line: 3/4"
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Works With: Signature Series Multi-Position or Stud Mount Air Handler (same capacity)
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Dimensions: 23.6"W x 23.6"D x 25"H
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Weight: 134 lbs
36,000 BTU
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Model: MCAESAS4T3621AA
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Cooling Capacity: 33,000 BTU/h
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Nominal Tonnage: 3 ton
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SEER2: 14.3
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EER2: 11.7
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Minimum Circuit Ampacity: 22.2 A
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Max Fuse / Breaker: 30 A
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Refrigerant Charge: 98.1 oz
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Sound Level: 63 dBA
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Airflow: 2,750 CFM
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Max Line Set Length: 150'
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Suction Line: 3/4"
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Works With: Signature Series Multi-Position or Stud Mount Air Handler (same capacity)
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Dimensions: 29.14"W x 29.14"D x 25"H
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Weight: 152 lbs
42,000 BTU
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Model: MCAESAS4T4221AA
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Cooling Capacity: 39,000 BTU/h
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Nominal Tonnage: 3.5 ton
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SEER2: 14.3
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EER2: 11.7
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Minimum Circuit Ampacity: 26 A
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Max Fuse / Breaker: 45 A
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Refrigerant Charge: 114.6 oz
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Sound Level: 65 dBA
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Airflow: 2,950 CFM
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Max Line Set Length: 150'
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Suction Line: 3/4"
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Works With: Signature Series Multi-Position Air Handler (same capacity)
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Dimensions: 29.14"W x 29.14"D x 32.88"H
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Weight: 185 lbs
48,000 BTU
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Model: MCAESAS4T4821AA
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Cooling Capacity: 45,000 BTU/h
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Nominal Tonnage: 4 ton
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SEER2: 13.8
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EER2: 11.2
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Minimum Circuit Ampacity: 30 A
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Max Fuse / Breaker: 50 A
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Refrigerant Charge: 116.4 oz
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Sound Level: 65 dBA
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Airflow: 4,000 CFM
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Max Line Set Length: 150'
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Suction Line: 7/8"
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Works With: Signature Series Multi-Position Air Handler (same capacity)
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Dimensions: 29.14"W x 29.14"D x 32.88"H
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Weight: 204 lbs
60,000 BTU
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Model: MCAESAS4T6021AA
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Cooling Capacity: 55,000 BTU/h
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Nominal Tonnage: 5 ton
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SEER2: 13.8
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EER2: 11.2
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Minimum Circuit Ampacity: 37 A
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Max Fuse / Breaker: 60 A
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Refrigerant Charge: 121.7 oz
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Sound Level: 65 dBA
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Airflow: 4,000 CFM
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Max Line Set Length: 150'
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Suction Line: 7/8"
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Works With: Signature Series Multi-Position Air Handler (same capacity)
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Dimensions: 29.14"W x 29.14"D x 32.88"H
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Weight: 206 lbs
What's Included
- MRCOOL Signature Series cooling-only condenser, factory charged with R-454B
- Installation and user manual
Installation
Professional installation required. This equipment must be installed by a licensed HVAC contractor (EPA Section 608-certified for any refrigerant work), following MRCOOL's installation manual and all local codes, permits and licensing rules. MRCOOL's limited warranty applies only to units installed that way, and it does not cover installation labor.
Pairs with the Signature Series multi-position air handler of the same capacity (all sizes) or the stud-mount air handler (1.5 to 3 tons); the indoor unit must carry the piston MRCOOL specifies. Refrigerant lines are 3/8" liquid with 3/4" suction (1.5 to 3.5-ton) or 7/8" suction (4 and 5-ton). Add 0.69 oz of R-454B per foot beyond 25' of line. Maximum line length 100' (1.5 to 2.5-ton) or 150' (3 to 5-ton). Power is 208/230V single phase; circuit sizes are in the Specifications tab.
Resources
Shipping, Returns & Warranty
Ships to addresses in the United States only, by freight carrier for the larger cartons. Shipping cost is calculated at checkout, and the carrier may call ahead to book a delivery window.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
MRCOOL handles returns through the store you bought from, so your return comes to us. Unopened, unused MRCOOL equipment can be returned within 21 days of delivery with a return authorization from us. You pay the return shipping, and a restocking fee of up to 20% may be deducted along with payment processing fees. Opened, installed or used equipment and special-order items can't be returned.
MRCOOL's limited warranty gives the original owner 10 years on parts and a limited lifetime warranty on the compressor, counted from the proof of purchase date. It covers replacement parts only, not labor, and it requires purchase from an authorized dealer, installation that follows all applicable codes, permits and licensing, and a matched, approved Signature air handler or coil. Full terms, registration steps and exclusions are in the MRCOOL warranty document under Resources.
Warranty claims. MRCOOL handles warranty claims directly through support.mrcool.com or (270) 366-0457. Some MRCOOL warranties cover the original purchaser only. Systems that aren't DIY need a valid installation invoice to open a claim.
About MRCOOL
MRCOOL designs heating, cooling and water-heating equipment from its home base in Hickory, Kentucky. The range runs from DIY ductless mini-splits, built around MRCOOL's patented pre-charged Quick Connect line sets, through contractor-installed mini-splits, central split systems, packaged units and gas furnaces, to HeatWise water heaters and CoolBlade HVLS fans for warehouses and shops.
The Signature Series is MRCOOL's single-stage central split line on R-454B: cooling-only and heat pump condensers from 1.5 to 5 tons, matched to Signature multi-position air handlers at every size and to Signature stud-mount air handlers from 1.5 to 3 tons. Condensers and air handlers are sold separately, and the variable-speed TruInverter models sit above them in the Signature range.
