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OLMO - R410A - 20.0 - 3 zone - Wall Mount - Sierra - 208-230V

3-Zone 42,000 BTU (3.5 Ton) R410A – Wall Mount AC & Heat Pump

3-Zone 42,000 BTU (3.5 Ton) R410A – Wall Mount AC & Heat Pump

$2,679.35 USD
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Product Overview

OLMO logo

Olmo Sierra 3-Zone | 42,000 BTU Multi-Zone, 230V (R410A) – Wall Mount

Multi-room comfort for 3 spaces. Wall Mount indoors, inverter heat pump outdoors, optional smart control, and up to 20.0 SEER2 efficiency.

42,000 BTU Up to 3  Zones Up to 20.0 SEER2 R410A 230V Wi-Fi  Smart Connect from Anywhere Choose your Line Set 5 Compressor / 2 Parts*

Why homeowners love it

  • Multi-zone comfort: Heat/cool 3 rooms independently for targeted comfort.
  • Efficient inverter: Variable-speed compressor reduces power draw and noise.
  • Smart options: Smart Connect from Anywhere.
  • Low profile indoors: Wall Mounts deliver quiet, even airflow.
  • Cold-weather capable: Heat pump performance designed for year-round use.
At-a-glance
Capacity
42,000 BTU (≈3.5 Ton)
Efficiency
Up to 20.0 SEER2
Zones
Up to 3 indoor units
Refrigerant
R410A

Watch: Overview

What’s included

  • (1) Outdoor condenser: OS-MSR42-230VO (42,000 Btu / 3.5 Ton)
  • Indoor units:

     3- Units of your Choice (Selected in the dropdown)

  • Remotes: Handheld Remote Controls Included with indoor units (THERMOSTAT NOT INCLUDED)
  • Mounting accessories for indoor units & manuals
  • Wi-Fi functionality via the ConnectLife Smartphone App

Key features

  • Remote control included
  • Smart Connect from Anywhere
  • Comfortable Sleep Mode
  • Turbo and Eco Modes
  • Multiple fan speeds
  • Timer
  • Louver auto swing
  • Self-clean mode
  • LED display

Comfort modes

  • Auto – chooses heat/cool to hold setpoint
  • Cool / Heat – direct seasonal control
  • Dry – dehumidify while maintaining temp
  • Sleep – 8-hour energy-saving profile
  • Timer – schedule on/off

Warranty

5-Year Compressor and 2-Year Parts (brand terms apply).

Registration and conditions may be required. See manufacturer warranty for details. Warranty Details

Tech specs — Indoor units (Wall Mount)

9,000 BTU — OS-M09SRW-230VI

Power source 208–230V, 1Ph, 60Hz
Voltage range 187–253 V
BTU rated 9,000
Indoor noise level (H/M/L) 39 / 35 / 30 dB(A)
Refrigerant piping (Liquid/Gas) 1/4" / 3/8"
Unit dimensions (W×H×D) 32.02 × 10.75 × 8.13 in
Packing dimensions (W×D×H) 39.38 × 13.19 × 6.38 in
Unit weight (Net/Gross) 19.84 / 24.25 lb
Manuals & documents

12,000 BTU — OS-M12SRW-230VI

Power source 208–230V, 1Ph, 60Hz
Voltage range 187–253 V
BTU rated 12,000
Indoor noise level (H/M/L) 39 / 35 / 30 dB(A)
Refrigerant piping (Liquid/Gas) 1/4" / 3/8"
Unit dimensions (W×H×D) 37.38 × 10.75 × 8.13 in
Packing dimensions (W×D×H) 39.38 × 13.19 × 6.38 in
Unit weight (Net/Gross) 19.84 / 24.25 lb
Manuals & documents

18,000 BTU — OS-M18SRW-230VI

Power source 208–230V, 1Ph, 60Hz
Voltage range 187–253 V
BTU rated 18,000
Indoor noise level (H/M/L) 45 / 41 / 37 dB(A)
Refrigerant piping (Liquid/Gas) 1/4" / 1/2"
Unit dimensions (W×H×D) 48 × 12.63 × 9.25 in
Packing dimensions (W×D×H) 51.75 × 15.44 × 12.50 in
Unit weight (Net/Gross) 31.97 / 37.48 lb
Manuals & documents

24,000 BTU — OS-M24SRW-230VI

Power source 208–230 V, 1 Ph, 60 Hz
BTU rated 23,400
Indoor air flow (CFM) 706
Indoor noise level (H/M/L) 47 / 45 / 42 dB(A)
Refrigerant piping (Liquid / Gas) 3/8″ / 5/8″
Unit dimensions (W × H × D) 42 ¾ × 12 ⅜ × 9 5⁄16 in
Packing dimensions (W × D × H) 46 ¹⁄₁₆ × 15 ⅜ × 12 ⁷⁄₁₆ in
Unit weight (Net / Gross) 31.97 / 37.48 lb
Controller L1-12
Manuals & documents
  • No individual manuals published yet for this model. Refer to the OLMO Multi Sierra Indoor Installation Manual and 2024 Catalog for specifications and wiring details.

Tech specs — Outdoor condenser (OS-MSR42-230VO)

Power source 208–230V, 1Ph, 60Hz
Voltage range 198–253 V
Cooling capacity (nominal) 42,000 Btu/h
Heating capacity at 47°F 42,000 Btu/h
SEER2 20
EER2 10.5
COP 3.17 W/W
Minimum circuit ampacity 35 A
Max fuse 50 A
Outdoor noise level 63 dB(A)
Refrigerant type R410A
Unit dimensions (W×H×D) 37-3/8 × 41-3/8 × 13-3/8 in
Packing dimensions (W×H×D) 43-3/4 × 18-1/8 × 47-1/4 in
Unit weight (Net/Gross) 198.4 / 224.5 lb
Manuals & documents

Verify breaker sizing, wire gauge, and installation parameters per the latest OLMO installation manual for this model.

Full description

Tap to expand

The Olmo Sierra multi-zone system delivers efficient, quiet heating and cooling for 3 rooms. Inverter technology right-sizes output to demand, helping lower energy use and noise. Choose from modes like Auto, Dry, and Sleep for seasonal comfort, and manage rooms individually with remote or the Smart Connect from Anywhere.

FAQs

Are these pre-charged?
Yes, the Outdoor Condenser is pre-charged with refrigerant

How do I activate warranty?
60 days from the point of Installation at Olmo Warranty or call 786-953-6706  EXT 3

How long is the warranty?
5-Years Compressor, 2 Years parts.

Is this system DIY?
We would not consider this a DIY system. Self-Install without a licensed HVAC Technician may void your manufacturer warranty. 

* Warranty terms vary by brand and region. Always review the manufacturer’s warranty and registration requirements.