By equipment
For a system with several indoor units, identify the shared outdoor unit, list the connected units and mark the branch containing the replacement coil. The review must cover that complete combination. For one matched pair, use the single-split guide.
Several indoor units may connect to one outdoor unit. Identify whether the replacement concerns one indoor branch or the shared outdoor coil. The outdoor unit's total capacity does not define each room's heat exchanger or its connections.
IN PRACTICE
The archive example shows three indoor units alongside one outdoor unit. The actual combination is defined by the project.
List the outdoor model and each connected indoor model.
State the exact unit and section that needs selection or replacement.
Use the manufacturer documentation to confirm the permitted combination and refrigerant circuit.
Three indoor units are shown as a presentation example; the image is not an approved connection diagram.
Retain the model list and branch diagram, including any specified distribution components. Check permitted unit combinations, pipework and refrigerant metering against the relevant series documentation. A coil with a suitable shape does not automatically become compatible with the shared system.
In a reversible system the coil's function depends on mode, while permitted simultaneous operation of the units depends on the actual arrangement. The term multi-split alone does not establish simultaneous heating and cooling. Record the original limits and required joint operating conditions.
Record refrigerant, branch identity, connections, sensors and coil measurements. For an indoor unit, add drain-pan and fan interfaces; for the outdoor unit, show the shared coil arrangement. Changing coil size or branching is not simply a like-for-like replacement.
REVIEW THE RESULT
Link the replacement coil to its branch or the shared outdoor unit. Retain every model and specified distribution component; one indoor unit's data does not describe the complete system.
Check compatibility using documentation for this exact series: models, branch roles, pipework limits and controls. The sum of nominal capacities is not a substitute for a permitted combination.
Record available modes and the rules for units operating together. Tie coil function to the selected mode; simultaneous heating and cooling must be established by the actual system design, not the multi-split label.
SELECTION INPUTS
Define operating conditions first. The input checklist above describes the data needed for this application. The enquiry form adapts to the selected duty; it does not calculate a coil rating.
Add the equipment nameplate, photographs, overall and finned dimensions, airflow direction, connections and access constraints. Matching the envelope alone does not confirm performance or compatibility.
Separate fixed interfaces from dimensions open to change. Attach the current drawing revision, duty points, material requirements, quantity and acceptance criteria. Manufacturing feasibility is confirmed for the specific specification.
Final performance, materials and compatibility require a project-specific selection and an approved drawing.
A shared outdoor unit links the branches. Replacement must account for compatibility and limits of the complete system, not just one indoor unit.
No. Permitted models and combinations must be checked against the manufacturer's documentation for that series. Matching brand or total nominal capacities is insufficient.
No. That capability depends on the design and circuit arrangement. It cannot be transferred from another system or inferred from the number of indoor units.