Description
Grandaire 1.5 Ton Air Conditioner Split System: W5A5S18AKAWA + FMA5L1800AL
This system pairs the Grandaire W5A5S18AKAWA air conditioner with the FMA5L1800AL wall-hung fan coil. It is an AHRI-matched combination (AHRI reference 214877460), so the efficiency numbers below were certified for these two exact models working together. Both units are built for R-454B refrigerant and ship with factory TXV metering at the indoor coil.
Certified system performance
- AHRI reference number: 214877460
- Nominal capacity: 1.5 ton (18,000 BTU/h); 18,200 BTU/h certified cooling
- Cooling efficiency: 15.5 SEER2 / 13.5 EER2
- Refrigerant: R-454B
- Power supply: 208/230V 1-phase, 60 Hz
Outdoor unit: Grandaire W5A5S18AKAWA
The W5A5S18AKAWA is a single-stage, 1.5-ton air conditioner with a scroll compressor, internal pressure relief valve, internal thermal overload and front-seating service valves. It is long-line capable to 250 ft total equivalent length and can cool down to 0°F with the low-ambient kit.
- Minimum circuit ampacity: 10.9 A | Max breaker: 15 A
- Line connections: 3/8 in. liquid, 5/8 in. rated vapor
- Factory charge: 4.2 lb R-454B | Sound power: 72 dBA
Air handler: Grandaire FMA5L1800AL
The FMA5L1800AL is a wall-hung, upflow-only fan coil made for apartment and condo closets. It fits between standard stud spacing, takes return air through the front, and keeps every service point at the front of the cabinet. A three-speed PSC blower (1/6 HP, about 650 CFM nominal) rides on rubber grommets for quieter operation, the coil is all aluminum, and a leak detection system is built in for R-454B. It must be installed in conditioned space. Cabinet size: 36-1/2 x 20-1/2 x 15 in. (H x W x D), 88 lb.
Electric heat
Heat strips are not included. If you want electric heat with this cooling system, choose a heater kit from the "Add an Electric Heat Strip" option above. Approved kits for this air handler: 5 kW (EHK205B), 7.5 kW (EHK208B), 10 kW (EHK210B). Ratings are at 240V; output is about 75% of that on a 208V supply.
Sizing and installation
Size the system from a Manual J load calculation rather than the size of the old unit. The FMA5L is upflow only and must stay inside conditioned space. Line sets over 15 ft need a charge adjustment (0.60 oz per foot on 3/8 in. liquid line), and the installer should evacuate, leak test and commission the system to the manufacturer's procedures, which also keeps the warranty in force.
Common questions
Is this a matched system?
Yes. AHRI certificate 214877460 covers the W5A5S18AKAWA with the FMA5L1800AL.
Does it come with a heat strip?
No. Heat strips are sold separately and can be added from the option above.
What is the warranty?
Both units carry a 5-year parts limited warranty, extended to 10 years with registration within 90 days of installation, and the outdoor unit adds a 1-year unit replacement limited warranty.
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