MRCOOL — Olympus 4th Gen (Ceiling Cassette Single-Zone)
MRCOOL® Olympus 4th Gen 9,000 BTU (3/4 Ton) Ceiling Cassette Mini Split Heat Pump — O-ES-09-HP-C-230C-O1 + CASSETTE09HP-230C-P-O
Overview
9,000 BTU Cooling 12,000 BTU Heating Up to 27.4 SEER2 EER2 15.4 HSPF2-4 12.5 3/4 Ton R-454B Ceiling Cassette 5 Speeds (Variable) DC Inverter ENERGY STAR® AHRI Certified Remote Included Pro Install Required
The MRCOOL® Olympus 9K Ceiling Cassette is a compact, ceiling-flush comfort solution for smaller spaces. It pairs a low-profile cassette (with panel) with a high-efficiency inverter condenser for reliable heating and cooling, using R-454B refrigerant.
Highlights
- Clean, flush look: Ceiling cassette design helps keep walls clear and maintains a modern finish.
- Quiet comfort: Indoor sound levels down to 24 dB(A) with a high rating of 42.5 dB(A).
- High efficiency: Up to 27.4 SEER2 and strong heating performance (HSPF2-4 12.5).
- Downflow delivery: Designed for downward airflow with oscillation for better mixing.
- Installer-friendly hookups: Flare fittings with 1/4" liquid and 3/8" suction.
- Compact coverage: Designed for spaces up to 400 sq ft.
Coverage
Up to 400 sq ft*
Up to 400 sq ft*
Cooling / Heating
9,000 / 12,000 BTU
9,000 / 12,000 BTU
Efficiency
Up to 27.4 SEER2
Up to 27.4 SEER2
Sound
Indoor 24–42.5 dB(A)
Indoor 24–42.5 dB(A)
*Coverage varies by climate, insulation, layout, and load.
What’s Included
- Outdoor Condenser: O-ES-09-HP-C-230C-O1
- Ceiling Cassette (with Panel): CASSETTE09HP-230C-P-O
- Remote Control
- Installation / user documentation (see Documents & Downloads)
Indoor Specs
Model: CASSETTE09HP-230C-P-O (Ceiling Cassette with Panel)
| System Type | Single-Zone Ductless Mini Split (Ceiling Cassette) |
| Tonnage | 0.75 Ton |
| Max Coverage Area | Up to 400 sq ft |
| Airflow Direction | Downflow |
| Indoor Noise (dB[A]) | 42.5 / 40 / 37.5 / 26 / 24 |
| Number of Speeds | 5 (Variable) |
| Oscillation | Yes |
| WiFi / App | No / No |
| Remote Control Included | Yes |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Max Fuse / Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Line Set Fitting Type | Flare |
| Liquid / Suction Line | 1/4" / 3/8" |
| Blower Motor Speeds | 353.2 / 312 / 264.9 / 182.5 / 147.2 |
| Blower Motor RPM | 600 / 530 / 380 |
| Filter Type | Reusable |
| Fan Only / Sleep / Auto Cool | Yes / Yes / Yes |
| Color / Mount Type | White / Ceiling |
| Dimensions (W×D×H) | 22.44" × 22.44" × 9.65" |
| Net Weight | 35.27 lb |
| UPC / GTIN | UPC 840255587945 • GTIN 00840255587945 |
| Restricted States | GU, PR, VI |
| Proposition 65 Warning | Yes |
| Works With | O-ES-09-HP-C-230C-O1 • MULTI3-18HP230C-O • MULTI4-27HP230C-O • MULTI5-36HP230C-O • MULTI6-48HP230C-O |
Outdoor Specs
Model: O-ES-09-HP-C-230C-O1 (Single-Zone Condenser)
| System Type | Single-Zone Ductless Mini Split Heat Pump |
| Tonnage | 0.75 Ton |
| Cooling / Heating Capacity | 9,000 BTU / 12,000 BTU |
| Max Coverage Area | Up to 400 sq ft |
| SEER2 / EER2 | Up to 27.4 / 15.4 |
| HSPF2-4 / HSPF2-5 | 12.5 / 9.5 |
| Outdoor Noise | 56 dB(A) |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 15A / 15A |
| Refrigerant | R-454B • 35.27 oz factory charge |
| Inverter | DC |
| Compressor Motor Type | Rotary |
| Metering Device | EXV |
| Line Set | Flared fittings • Liquid 1/4" • Suction 3/8" |
| Max Line Set Length | 82 ft |
| Dimensions (W×D×H) | 31.69" × 12.99" × 21.81" |
| Net Weight | 72.75 lb |
| Energy Star Certified | Yes |
| AHRI Certified | Yes |
| UPC / GTIN | UPC 840255587624 • GTIN 00840255587624 |
| Restricted States | GU, PR, VI |
| Proposition 65 Warning | Yes |
| Works With | O-09-HP-WMAH-230C-O • DUCT-09HP-230B-O • CASSETTE09HP-230C-O |
Documents & Downloads
Important
- Professional installation: Installation by a licensed HVAC professional required where applicable.
- Electrical circuit: Size the circuit from the outdoor unit: 15A MCA with a 15A max breaker.
- Refrigerant & line length: Factory charge supports standard runs; longer runs may require additional refrigerant.
- Proposition 65: Warning applies (see product documentation).
FAQs
Does this system require professional installation?
Yes. Installation by a licensed HVAC professional is required where applicable.
Is WiFi / app control included?
This cassette model is listed as no WiFi and no app compatibility. Remote control is included.
What line set sizes does it use?
Flare connections: 1/4" liquid and 3/8" suction.
What electrical circuit is required?
208/230V, 1-phase, 60 Hz. The outdoor unit specifies 15A MCA and a 15A max breaker.
What warranty comes with it?
Base warranty includes 5-year parts and 7-year compressor coverage (see the warranty document for full terms).
