Single-Zone Systems
Alpic + Sierra
Wall-Mounted Series
Quiet, efficient room-by-room comfort with straightforward installation and smart-control options.
OLMO - R410A - 20.0 - 3 - 5 zones - Outdoor Condenser - Sierra - 208-230V
OLMO Multi-Zone R410A Outdoor Condenser 42,000 BTU (3.5 Ton)
OLMO Multi-Zone R410A Outdoor Condenser 42,000 BTU (3.5 Ton)
Regular price
$1,857.00 USD
Regular price
$2,186.00 USD
Sale price
$1,857.00 USD
Shipping calculated at checkout.
Quantity
Couldn't load pickup availability
Product Overview
Product Overview
OLMO Multi-Sierra 42,000 BTU Outdoor Heat Pump — OS-MSR42-230VO
From 3-5 zones. Inverter heat pump with up to 20 SEER2 and 10.5 EER2. Designed for Multi-Sierra wall-mount indoor units.
42,000 BTU/h Up to 5 zones Heat pump • Inverter SEER2 up to 20 EER2 up to 10.5 R410A 208–230V, 1Ph, 60Hz
Why pros choose this outdoor unit
- Flexible zoning: supports up to 5 independent wall-mount IDUs.
- Efficient comfort: inverter compressor with up to 20 SEER2 cooling performance.
- All-season use: heat pump heating capacity rated at 47°F.
- Service-friendly: single-phase power with clear MCA and max fuse specs.
At-a-glance
Model
OS-MSR42-230VO
OS-MSR42-230VO
Zones
From 3-5 zones
From 3-5 zones
Refrigerant
R410A
R410A
Noise
63 dB(A)
63 dB(A)
What’s included
- Outdoor inverter heat pump unit OS-MSR42-230VO
- Owner/installation documentation (per shipment)
Indoor units, line sets, communication cable, and accessories sold separately.
Tech specs
| Spec | Details |
|---|---|
| Model | OS-MSR42-230VO |
| Type | Inverter heat pump, multi-zone (up to 4 IDUs) |
| Cooling capacity (nom.) | 42,000 BTU/h |
| Heating capacity @ 47°F | 42,000 BTU/h |
| SEER2 / EER2 (up to) | 20 / 10.5 |
| Refrigerant | R410A |
| Power | 208–230 V, 1-Phase, 60 Hz |
| Voltage range | 198–253 V |
| MCA / Max fuse | 35 A / 50 A |
| Sound level | 63 dB(A) |
| Unit dimensions (W×H×D) | 37-3/8 × 41-3/8 × 13-3/8 in |
| Packing dimensions (W×D×H) | 43-3/4 × 18-1/8 × 47-1/4 in |
| Net / Gross weight | 198.4 / 224.5 lb |
| COP | 3.17 |
| Compatible IDUs | OLMO Multi-Sierra wall-mount indoor units |
Match piping sizes, charge, and port counts to the selected indoor units and line lengths per installation manual.
Documents
Warranty
- 5-year compressor limited warranty
- 2-year parts limited warranty (licensed HVAC install and registration within 60 days)
FAQs
How many rooms can this support?
From 3- 5 zones when paired with compatible Multi-Sierra wall-mount indoor units.
What refrigerant does it use?
R410A.
What electrical protection is required?
Minimum circuit ampacity 35 A and maximum fuse 50 A at 208–230 V single phase. Follow local code.
Is this cold-climate rated?
Heating capacity is specified at 47°F. See full engineering data for low-ambient performance.
