Mitsubishi PAC-LMA30BC 3-Port Branch Box For Smart-Multi Systems - 454B - PACLMA30BC

What our Experts Think

• Essential Multi‑Zone Component: The Mitsubishi PAC‑LMA30BC 3‑Port Branch Box is a key accessory for Smart‑Multi and MXZ‑SM series HVAC systems, enabling efficient multi‑zone configurations by managing refrigerant distribution from one outdoor unit to up to three indoor units.

• Balanced Refrigerant Flow: Designed with precise flow control, it ensures even refrigerant distribution to each indoor unit so that performance remains stable across zones, improving overall system comfort and efficiency.

• Smart Compatibility: Works with R‑454B refrigerant on compatible Mitsubishi Smart‑Multi or MXZ‑SM multi‑zone outdoor units, making it suitable for advanced residential or light commercial setups.

• Compact & Durable Design: Built with a compact galvanized steel enclosure, this branch box is easy to position in tight mechanical spaces and resists corrosion for long‑term reliability.

• Simplified HVAC Integration: Three dedicated liquid and gas line connections streamline installation and help reduce piping complexity in multi‑head systems.

• Flexible System Planning: Ideal when you want to expand or zone your HVAC layout efficiently—perfect for homes or buildings needing customized comfort control across several indoor areas.

• Pro‑Grade HVAC Choice: Recommended by professionals for properly engineered multi‑zone installations that require reliable refrigerant management and scalable performance.

Q&A

Q: What type of unit is this?
A: This is a horizontal concealed ducted indoor air handler designed for mini‑split systems, ideal for discreet climate control through short duct runs.

Q: What capacity does it provide?
A: It offers about 9,000 BTU nominal cooling and heating capacity, suitable for small‑to‑medium rooms (roughly up to ~350 sq ft).

Q: What refrigerant does it use?
A: Uses R‑454B refrigerant, which has lower global warming potential (GWP) than older refrigerants, making it more environmentally friendly.

Q: What are the airflow and noise specs?
A: Airflow ranges roughly 194–317 CFM, with quiet operation as low as 23 dB(A)—whisper‑quiet comfort suitable for bedrooms and living spaces.

Q: Is it compatible with multi‑zone systems?
A: Yes — it works with both single‑zone and multi‑zone Mitsubishi systems and supports various control options, including wired, wireless, and app‑enabled comfort control.

Q: Does it include a controller?
A: No — a thermostat/remote controller is not included and must be purchased separately.

Q: What installation space does it suit?
A: Its ultra‑slim, low‑profile design (about 7‑7/8" tall) fits into tight ceiling cavities, soffits, or attic spaces where concealed ducting is preferred.

Q: What power requirements does it have?
A: Operates on 208/230 V single‑phase electrical supply typical for HVAC indoor air handlers.

Maintenance Tips

• Supports up to 3 indoor units in Smart‑Multi / MXZ‑SM systems.

• Distributes R‑454B refrigerant efficiently for balanced performance across zones.

• Durable galvanized steel construction for long-lasting protection.

• Compact design fits tight mechanical spaces easily.

• Low power consumption (~0.003 kW input, 0.15 A running current).

• Single-phase 208/230 V, 60 Hz electrical operation.

• Flare connections: 1/4" liquid × 3, 3/8" gas × 3 (indoor); 3/8" liquid, 5/8" gas (outdoor).

• Ensures smooth multi-zone operation with proper refrigerant metering.

• Ideal for residential or light commercial Smart-Multi system installations.