Description
Grandaire 2 Ton Heat Pump Split System: W5H5S24AKAAA + FMA5L2400AL
This system pairs the Grandaire W5H5S24AKAAA heat pump with the FMA5L2400AL wall-hung fan coil. It is an AHRI-matched combination (AHRI reference 214424002), 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: 214424002
- Nominal capacity: 2 ton (24,000 BTU/h); 22,600 BTU/h certified cooling
- Cooling efficiency: 14.5 SEER2 / 11.7 EER2
- Heating efficiency: 7.5 HSPF2
- Refrigerant: R-454B
- Power supply: 208/230V 1-phase, 60 Hz
Outdoor unit: Grandaire W5H5S24AKAAA
The W5H5S24AKAAA is a single-stage, 2-ton heat pump with a scroll compressor, suction line accumulator, loss-of-charge switch and front-seating service valves. It cools in summer and reverses in winter to move heat into the home, which covers most of the heating season in warm and mixed climates.
- Minimum circuit ampacity: 13.5 A | Max breaker: 20 A
- Line connections: 3/8 in. liquid, 5/8 in. rated vapor
- Factory charge: 5.4 lb R-454B | Sound power: 71 dBA
Air handler: Grandaire FMA5L2400AL
The FMA5L2400AL 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 (1/5 HP, about 800 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. For backup and defrost heat, 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 214424002 covers the W5H5S24AKAAA with the FMA5L2400AL.
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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