⚠️ Safety Notice – Reverse Cycle Air Conditioners
This equipment must only be installed, commissioned, serviced and repaired by suitably qualified and licensed personnel.
Before commencing work, complete a task-specific risk assessment and ensure electrical isolation procedures, safe access, adequate service clearances and appropriate PPE have been considered. All work must comply with applicable regulations, standards and manufacturer requirements.
Particular care must be taken when working around electrical systems, refrigerant circuits, moving parts, roof spaces, ceiling spaces, confined spaces and working-at-heights hazards where applicable.
Do not proceed if safe access, required clearances, confined space risks or appropriate safety controls cannot be achieved and maintained.
Safety takes priority over diagnosis, repairs, installation schedules and customer expectations. If the task cannot be completed safely, it must not proceed until the risks have been adequately controlled.
Overview
This solution provides installation information for Braemar MDHX VRF ducted indoor units.
Use this manual when installing, commissioning, or servicing MDHX ducted indoor systems.
When should I use this manual?
Use this manual when you need help with:
- Installing an MDHX VRF ducted indoor unit
- Electrical wiring and communications
- Refrigerant pipework and condensate drainage
- Duct connections and airflow setup
- External static pressure (ESP) settings
- Commissioning checks and fault codes
This document is intended for installers, technicians, and technical support teams.
Systems covered
This manual applies to MDHX VRF ducted indoor units, including:
- Compact ducted units
- Slim high‑static ducted units
- High‑static ducted units
Always confirm the unit model and data label before installation.
What this manual includes
- Installation requirements and clearances
- Hanging and mounting instructions
- Condensate drainage guidelines
- Refrigerant piping standards
- Electrical wiring diagrams
- Controller setup and airflow settings
- Error codes and troubleshooting
- Commissioning and maintenance guidance
Important notes
- Installation must be carried out by a licensed and qualified technician
- Follow all local, state, and national regulations
- Correct installation is required for safe operation and warranty compliance
This manual should be used as the primary reference when working with MDHX VRF ducted indoor units.