OLMO Multi-Zone Outdoor Condenser — 18,000 BTU • OS-MSR18-230VO
Inverter heat pump outdoor unit for up to 2 independent zones, designed to pair with Olmo Multi-Sierra wall-mounted indoor units.
Overview
The OS-MSR18-230VO is an 18,000 BTU multi-zone outdoor condenser for the Olmo Multi-Sierra platform. It supports up to 2 independent zones using compatible Multi-Sierra wall-mounted indoor units. This unit is an inverter heat pump designed to deliver both cooling and heating performance with efficiency ratings up to 21 SEER2.
Highlights
- Two-zone flexibility: Built for Multi-Sierra combinations in up to 2 independent zones.
- Efficient performance: Ratings listed up to 21 SEER2 and 12.5 EER2.
- Cold-weather heating: Heating ambient range listed as -13 to 75.2°F.
- Long-run piping support: Max pipe length listed as 82/164 ft (as provided).
What's Included
- Outdoor condenser unit: OS-MSR18-230VO
Outdoor Specs
| Spec | Details |
|---|---|
| Model | OS-MSR18-230VO |
| Refrigerant Type | R410A |
| System Type | Multi-zone unit |
| Cooling Capacity (Nominal) | 18,000 |
| Heating Capacity @ 47°F | 18,000 |
| Power Source | 208–230V, 1Ph, 60Hz |
| Voltage Range | 198–253 V |
| SEER2 (Up To) | 21 |
| EER2 (Up To) | 12.5 |
| HSPF2-5 | 8.53 |
| HSPF2-4 | 10.34 |
| COP | 3.45 |
| Refrigerant Piping (Liquid / Gas) | 1/4" / 3/8" |
| Max Pipe Length (ft) | 82 / 164 |
| Max Height Difference (Indoor ↔ Outdoor) | 15 |
| Refrigerant Precharge | 25 |
| Additional Refrigerant Charge (3/8" liquid) | 0.16 |
| Additional Refrigerant Charge (1/4" liquid) | 0.16 |
| Outdoor Noise Level | 55 dB(A) |
| Outdoor Air Flow | 1.85 |
| Minimum Circuit Ampacity (MCA) | 21 |
| Max Fuse | 30 |
| Ambient Temp Range (Heating) | -13 to 75.2°F |
| Ambient Temp Range (Cooling) | 14 to 114.8°F |
| Unit Dimensions (W×H×D) | 33-7/8 × 26-3/8 × 12-1/4 in |
| Unit Net / Gross Weight | 116.8 / 125.6 lb |
| Packing Dimensions (W×D×H) | 39 × 17-3/4 × 28-3/4 |
Videos
Documents & Downloads
Important
Installed by a licensed HVAC professional. This is a multi-zone outdoor heat pump intended for use with compatible Olmo Multi-Sierra indoor units. Confirm electrical requirements, allowed piping lengths/height differences, and line sizes before ordering. Additional refrigerant may be required for runs beyond the factory precharge.
FAQs
How many zones can this outdoor unit support?
Is this a heat pump?
What refrigerant does it use?
What are the efficiency ratings?
What ambient temperatures can it operate in?
Does it have AHRI certification?
