The CITIMAX 400 is a truck refrigeration unit designed to support temperature-controlled transport, but its exact technical specification depends on the selected configuration, vehicle body, installation method, and operating conditions. When I evaluate a CITIMAX 400 project, I do not treat the model name as a complete specification. I confirm the required temperature range, cooling-capacity data at defined test conditions, vehicle voltage, condenser and evaporator arrangement, control system, and mounting requirements before recommending a solution. In practical terms, the unit may suit refrigerated distribution, food delivery, fresh produce transport, and other applications where a truck body must maintain a controlled temperature during transit.
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The CITIMAX 400 is a commercial truck refrigeration system used to remove heat from an insulated cargo body. It is normally considered as part of a complete transport refrigeration solution rather than as an independent component. The final result depends on the refrigeration unit, insulation quality, door sealing, cargo loading pattern, ambient temperature, and delivery frequency.
I recommend viewing “CITIMAX 400” as a model identifier that requires configuration confirmation. The model name alone does not reliably provide the cooling capacity in watts, the precise temperature range, or the electrical requirements for every installation. A professional quotation should therefore include the applicable technical datasheet, operating conditions, installation drawings, and compatibility information for the intended truck.
The primary function is to maintain the target temperature inside an insulated truck body after the cargo has been loaded. The refrigeration system extracts heat that enters through the body panels, doors, floor, roof, and frequent openings. It can also help remove heat generated by warm products, although the unit should not be selected as a substitute for proper pre-cooling.
These functions are only effective when the vehicle body and loading process are properly managed. I therefore assess the refrigeration unit together with the complete cold-chain workflow, including loading temperature, route duration, stop frequency, and service access.
Urban delivery trucks often stop many times during one route, creating repeated door-opening events and heat gain. A CITIMAX 400 application can be appropriate when the body size and thermal load match the unit’s verified capacity. I pay particular attention to door curtains, door condition, cargo arrangement, and the time required for each delivery stop.
Fresh produce, dairy products, prepared foods, and similar goods may require a controlled chilled environment. The correct setpoint must come from the product handling requirement rather than from a general assumption about the refrigeration unit. For example, a buyer should document the required cargo temperature in °C and confirm that the unit can maintain it under the expected ambient conditions.
Frozen applications require a separate review because low-temperature transport can create a higher refrigeration load than ordinary chilled distribution. I recommend requesting verified cooling-capacity values at both the intended operating temperature and the expected ambient temperature. If the cargo is loaded warm or the doors are opened frequently, the buyer may need a different unit size or a stronger operating plan.
For emergency vehicles, mobile medical transport, and other specialist vehicles, temperature stability and monitoring may be more important than maximum cargo volume. The installation must also respect the vehicle’s power supply, interior layout, equipment access, and operational safety requirements. I recommend a project-specific review instead of assuming that a standard truck installation will meet a specialist vehicle’s needs.
Because configuration and market documentation can vary, I advise buyers to confirm the following specifications in writing before placing an order. These are the practical data points that determine whether the CITIMAX 400 is suitable for a particular vehicle.
| Specification area | What I recommend confirming | Why it matters |
|---|---|---|
| Cooling capacity | Capacity in watts or kilowatts at the specified cargo and ambient temperatures | Capacity changes with operating conditions and should match the calculated heat load |
| Temperature range | Permitted setpoints in °C and the intended chilled or frozen application | Different products require different operating conditions |
| Electrical system | Vehicle voltage, such as 12 V or 24 V, and alternator compatibility | Incorrect electrical matching can prevent reliable operation |
| Vehicle compatibility | Body length, internal volume in m³, mounting position, and engine arrangement | The unit must work with the available truck space and thermal load |
| Installation requirements | Condenser position, evaporator clearance, refrigerant routing, and service access | Installation quality affects airflow, maintenance, and operating reliability |
| Controls and monitoring | Controller functions, temperature display, alarms, and optional monitoring interfaces | Operators need practical visibility of cargo conditions |
Three measurable values should appear in every serious technical review: the required cargo temperature in °C, the cargo-body volume in m³, and the available vehicle voltage in V. I also ask for the expected route duration in hours because a short local route and a long-distance delivery can create very different operating demands. These figures are project inputs, not universal CITIMAX 400 specifications, and they must be checked against the current product documentation.
The CITIMAX 400 may be supplied as part of different installation arrangements depending on the truck design and operating requirements. The condenser and evaporator locations must provide sufficient airflow without obstructing vehicle components or service areas. The final arrangement can also affect noise, maintenance access, body clearance, and protection from road debris.
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I normally distinguish between a standard insulated-body installation and a specialist installation. A standard delivery truck may prioritize compact integration and quick service access, while an emergency or medical vehicle may require enhanced monitoring, backup planning, or a customized interior layout. The refrigeration unit should be selected only after these requirements are documented.
Start by recording the product type, loading temperature, required transport temperature, maximum acceptable temperature variation, and delivery duration. Do not select the system only by truck size. A small body carrying warm cargo may have a greater heat load than a larger body carrying properly pre-cooled products.
The evaluation should consider body dimensions, insulation, door openings, ambient temperature, solar exposure, cargo respiration where relevant, and product pull-down requirements. I recommend using the manufacturer’s stated performance data at comparable test conditions rather than comparing one headline capacity number with another. If the operating conditions are unclear, the quotation should clearly identify its assumptions.
Confirm the vehicle voltage, engine arrangement, available mounting space, body construction, and alternator capacity. A 12 V system and a 24 V system should not be treated as interchangeable without technical confirmation. I also check whether the planned installation allows technicians to reach filters, belts, electrical connections, and other service points safely.
A refrigeration unit is a long-term operating asset, so the purchase decision should include service response, spare-parts availability, commissioning, operator training, and troubleshooting support. A supplier should explain what is included in the quotation and which services are provided by the buyer’s local team. This is especially important for fleets that operate across multiple cities or countries.
One frequent mistake is assuming that “400” represents a universal cooling value. I advise buyers to request the actual capacity curve or test values for the intended temperature and ambient conditions. Another mistake is ignoring the thermal performance of the truck body, even though damaged seals, weak insulation, and frequent door openings can significantly increase the refrigeration load.
Buyers also sometimes compare prices without comparing scope. A low equipment price may exclude installation, controller options, commissioning, documentation, spare parts, or after-sales support. I recommend requesting a line-item quotation that separates the unit, installation materials, technical service, testing, delivery, and any optional monitoring features.
At ACOOLER, I support B2B buyers by organizing the technical information required for a practical refrigeration-unit decision. I can help review vehicle details, cargo requirements, body dimensions, operating temperatures, voltage, route conditions, and installation constraints before preparing a quotation. This approach reduces the risk of selecting a unit from incomplete information.
Our support can include product consultation, configuration coordination, export communication, installation guidance, spare-parts planning, and after-sales assistance according to the agreed project scope. I do not present unverified values as fixed CITIMAX 400 specifications. Instead, I encourage buyers to confirm the current datasheet, performance conditions, compatibility details, and service arrangements before final approval.
The CITIMAX 400 can be a suitable choice for truck refrigeration applications when its verified performance matches the cargo requirement, vehicle body, electrical system, and route conditions. I would not make the decision from the model name alone because the correct specification depends on the complete installation and operating environment. The next step is to prepare your vehicle and cargo data, then request a configuration review based on documented performance values.
For a quotation from ACOOLER, please prepare the truck model, body dimensions, internal volume, voltage, cargo type, loading temperature, required setpoint, ambient conditions, route duration, and expected door-opening frequency. I can then help identify the information that must be confirmed with the current CITIMAX 400 documentation and clarify the equipment, installation, export, and support scope for your project.
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