By equipment
A packaged rooftop air conditioner contains different heat-exchange components. Mark the required coil on a photograph and retain the unit and refrigerant-circuit identification.
During cooling, one coil conditions the air supplied to the building while another rejects heat outdoors. Select replacements for those duties separately. If the rooftop unit operates as a heat pump, check its circuit and all required operating modes rather than assigning a permanent function from the coil's location alone.
IN PRACTICE
General ventilation-unit and liquid-coil views explain the component level while the rooftop model remains to be identified.
Send the unit model and the section to be replaced or specified.
Record its frame, air passage, connection side and access route.
Use the equipment drawing and measurements to establish fit.
These generic archive views cannot establish rooftop dimensions, weather protection or a supplied package.
Record the complete model, serial number and the circuit being replaced. Check the refrigerant, circuit arrangement, connections and original coil construction. The term rooftop does not establish a Cu-Al design; visual similarity alone does not justify substituting a copper-aluminium coil for another technology.
The air-treatment coil needs airflow, entering temperature and humidity, and the required result. The outdoor coil needs ambient conditions and its airflow arrangement. For a cooling coil, check the drain-pan and condensate-outlet positions; matching coil dimensions does not establish correct integration with the complete air path.
Compare the frame, coil depth, fixings and connection positions with the available opening. Show service panels and the removal route. An image of an isolated coil represents that component only; compressors, fans, controls and the rooftop casing remain separate parts of the scope.
REVIEW THE RESULT
Link the proposal to the model, serial number, coil identity and circuit. Evaporator or condenser duty must match the specified operating mode; do not accept materials or circuiting from visual similarity.
Check airflow, air state, refrigerant and refrigeration inputs for this specific coil. Identify the checked modes separately for a reversible unit; total rooftop capacity does not replace a coil selection.
Verify the frame, depth, fixings, connections and service opening. For a cooling coil, also check its interface with the drain pan and drainage. An isolated-coil image does not validate the complete unit.
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.
No. A packaged rooftop air conditioner comprises several components. A coil enquiry must identify the specific heat-exchange assembly within that unit.
No. A photograph helps identify the arrangement but cannot transfer one component's duty and circuit to another. Information must refer to the coil actually being replaced.
It provides context but does not define an individual coil or the allocation among circuits. Operating conditions, component identity and connections are also required.