Description
The MRCOOL Olympus 4th Gen MULTI3-18HP230C-O is a 18,000 BTU multi-zone outdoor condenser that runs up to 3 indoor units from one outdoor unit, rated up to 25.1 SEER2 on R-454B refrigerant. Mix wall-mounted, ceiling cassette and concealed ducted Olympus 4th Gen indoor units (9K–24K) to condition several rooms independently.
The MRCOOL® Olympus MULTI3 18HP230C O is a high performance 18,000 BTU multi zone heat pump condenser designed to power up to 3 indoor units simultaneously. It is ideal for managing temperatures across multiple rooms with independent zone control.Built with advanced inverter technology, the unit delivers strong efficiency with SEER2 up to 25.1 and HSPF2 4 up to 10.
It operates reliably in outdoor temperatures as low as 5°F, supporting consistent comfort in both heating and cooling conditions.This model is compatible with wall mounted, ceiling cassette, and concealed duct indoor units, allowing flexible system design based on layout and installation needs.Smart functionality includes the MRCOOL SmartHVAC app, remote control access, and voice control compatibility with Amazon Alexa and Google Assistant.
Additional features such as sleep mode, auto restart, and refrigerant leak detection enhance system usability and protection.Backed by a 7 year compressor warranty and 5 year parts warranty when professionally installed, the MRCOOL Olympus MULTI3 18HP230C O delivers efficient, reliable, and customizable multi zone performance. Find the Brochure HERE
Key Features
- Up to 3 zones: Connect up to 3 Olympus 4th Gen indoor units of mixed styles.
- DC inverter compressor: Variable-speed operation for quiet, efficient multi-room comfort.
- R-454B refrigerant: Low-GWP A2L refrigerant.
- Total line length:ft combined line set length.
- Compatible indoor units: Olympus 4th Gen wall mounted (O-xx-HP-WMAH-230C-O), ceiling cassette (CASSETTExxHP-230C) and ducted (DUCT-xxHP-230B-O).
Product Specifications
| Brand | MRCOOL |
|---|---|
| Model | MULTI3-18HP230C-O |
| Series | Olympus 4th Gen |
| SEER2 | Up to 25.1 |
| EER2 | Up to 14 |
| HSPF2-4 | 9.8 |
| HSPF2-5 | 7.8 |
| Tonnage | 1.5 |
| Cooling Capacity (BTU) | 18000 |
| Heating Capacity (BTU) | 19000 |
| Voltage (V) | 230 |
| Max Fuse Breaker (A) | 20 |
| Min Circuit Ampacity (A) | 16 |
| Color | White |
| Max Coverage Area | Up to 750 |
| Zone Capacity | 3 |
| Refrigerant Type | R-454B |
| Decibel Rating (dBA) | 59.5 |
| Inverter | DC |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 3 x 1/4 |
| Suction Line Size | 3 x 3/8 |
| Compressor Motor Type | Twin-Rotary |
| Condenser Fan Motor RPM | 750/600/500 |
| Metering Device | EXV + Capillary |
| Base Warranty | 5-Year Parts / 7-Year Compressor |
| Base Parts Warranty | 5-Year |
| Base Compressor Warranty | 7-Year |
| Base Remote Warranty | 5 Year |
| Net Depth (in) | 13.46 |
| Net Height (in) | 26.5 |
| Net Width (in) | 35.04 |
| Net Weight (lb) | 100.53 |
Compatibility & Installation
Matched with: Olympus 9k 4th Gen Hyper Heat Air Handler - 230v Olympus 9k 4th Gen Ducted Mini Split Air Handler - 230v Olympus 9k 4th Gen Ductless Ceiling Cassette - 230v Olympus 12k 4th Gen Hyper Heat Air Handler - 230v Olympus 9k 4th Gen Ducted Mini Split Air Handler - 230v Olympus 12k 4th Gen Ductless Ceiling Cass
- Line set: Flare connections — 3 x 1/4" liquid × 3 x 3/8" suction; maximum line length per manual. Line set not included.
- Electrical: 208/230V single-phase, 60 Hz.
- Professional installation: Requires installation by a licensed HVAC technician (evacuation and charge verification with gauges). R-454B is an A2L refrigerant — follow current codes.
