Integrated multi-functional rooftop unit

I. Product Overview

Rooftop air conditioning units are central air conditioning products that integrate heating and cooling sources with air handling. This product is a full air system that uses a combination of refrigeration systems, control systems, and various air handling sections to achieve cooling, heating, dehumidification, humidification, noise reduction, air purification, and fresh air delivery. It uses a heat exchanger in the refrigeration system to allow the refrigerant to directly exchange heat and moisture with the air, eliminating energy losses associated with secondary exchange through intermediate heat transfer media. It does not require auxiliary equipment and facilities such as circulating water pumps, cooling towers, water pipes, and dedicated machine rooms, thus reducing engineering costs, shortening installation time, and eliminating the risk of indoor water leakage. The unit is installed on the roof or outdoor courtyard, eliminating the need for a machine room and significantly improving building utilization. This product is ideal for comfort air conditioning systems in stadiums, exhibition centers, theaters, conference rooms, airports, and train stations, and can also be widely used in process air conditioning systems for the pharmaceutical, electronics, food, machinery, and textile industries.

II. Product Features

Rooftop air conditioning units are a flagship product of our company. Through years of continuous improvement, the unit series has become more complete and features high energy efficiency, low noise, high static pressure, high control accuracy, high reliability, low vibration, high corrosion resistance, good sealing performance, good rain and dust prevention, easy installation, and an aesthetically pleasing appearance. Fresh air can be easily introduced without the need for a dedicated fresh air unit and ductwork, fully meeting the high requirements for indoor air quality. It is widely applicable to central air conditioning systems in areas where water system installation is inconvenient or water resources are scarce.

	Complete Specifications The units are available in a wide range of models and specifications, including single-cooling, cooling-heating, heat pump, fresh air, and cleanroom types. Various functional sections are available, allowing for easy implementation of cooling, heating, humidification, dehumidification, reheating, air purification, noise reduction, and energy-efficient fresh air supply. Fresh air can be easily introduced without the need for a dedicated fresh air unit and ductwork, fully meeting the high requirements for indoor air quality. It is widely applicable to central air conditioning systems in areas where water system installation is inconvenient or water resources are scarce.
	Space Saving The unit is designed for rooftop or outdoor courtyard installation and features sun protection, corrosion resistance, and storm protection. No dedicated machine room is required, saving valuable indoor space.
	Subcooling Design The condenser at the bottom of the unit is designed with a subcooling circuit. During cooling, the degree of subcooling of the refrigerant liquid is increased, improving cooling capacity and efficiency. This effectively solves the problem of incomplete defrosting due to ice formation at the bottom of the coil during heating.

	Multi-Level Control Compressor paralleling + hot gas bypass achieves multi-level regulation, avoiding frequent compressor starts and stops, extending the service life of the unit, reducing the impact on the power grid, improving the overall energy efficiency at partial loads, and complying with energy conservation and emission reduction policies. Service Life, and reduces the impact on the power grid, improving the overall energy efficiency at partial loads, and complying with energy conservation and emission reduction policies.
	Low Air Leakage Rate The use of a stepped multi-seal structure and a continuous seamless elastomer sealing surface ensures that the unit At 1000Pa static pressure, the air leakage rate is 0.66%, less than the 1% specified in the national standard GB T19569-2004, reaching the highest L1 level in the European standard EN1886-2007.
	Stainless Steel Integral Frame The frame uses a steel-aluminum composite structural design: the strength is 83.7% higher than that of conventional aluminum alloy frames and 63.9% higher than that of conventional steel frames. It combines the high precision and aesthetics of aluminum alloy frames. At 1000Pa, the cabinet deformation is 0.68mm/m; at 2500Pa, the cabinet deformation is 1.55mm/m, far exceeding the national standard requirement of <4mm/m at 1000Pa, reaching the highest D1 level in the European standard EN1886-2007.
	Stainless Steel Integral Water Pan The evaporator section of the unit features an integral water pan with an inclined design. The water pan is of a tray type, with the lowest point at the drain outlet, allowing for rapid drainage of condensate and preventing water accumulation. It also offers excellent insulation and high strength.
	Brand-Name Components Key components of the unit, including compressors, electronic expansion valves, heat exchangers, centrifugal fans, axial flow fans, humidifiers, electric heaters, and electrical components, are selected from internationally or domestically renowned brands to ensure stable quality, energy-efficient operation, and reliable safety.
	Complete Unit Control It uses industrial-grade microcomputer control, with powerful computing capabilities. It can perform real-time monitoring and analysis of various operating parameters of the unit, ensuring that the unit is always in optimal operating condition. It also has remote communication capabilities.

III. Product Application Guide

Nominal Operating Conditions

IV. Product Types and Selection

Newly launched integrated multi-functional rooftop air conditioning units include five series: cooling-heating (heat pump) type, single-cooling type, cooling-heating type, cleanroom type, and fresh air type.
25kW~200kW
Heating Capacity Range: 26kW~210kW
Airflow Range: 2000m³/h~40000m³/h
External Static Pressure Range: 25Pa~1000Pa
Selection Guide for Integrated Multi-functional Rooftop Units

Side supply side return

Bottom supply bottom return

Please write down the unit model number you need according to the unit model number representation method:

Example:
(1) The nominal cooling capacity is 55kW, return air type heat pump unit, with auxiliary electric heating, refrigerant R410A, filtration grade G3 + F5, air supply method is side supply side return, external static pressure 300Pa integrated rooftop unit model should be: XYWFAJRDC55-300.
(2) The nominal cooling capacity is 90kW, 100% fresh air heating and cooling unit, refrigerant R410A, filtration grade G3, evaporative humidification, air supply method is bottom supply bottom return, external static pressure 350Pa integrated rooftop unit model should be: XYWFAXRMCA90-350。

V. Ordering Notes

(1) The unit "technical parameter table" provides the cooling capacity and heating capacity of the rooftop air conditioning unit under the rated operating conditions. If the operating conditions are different from the rated operating conditions, they should be corrected according to the "variable operating condition performance correction coefficient:"
(2) The duct resistance of the entire air conditioning system should match the external static pressure. If the selected external static pressure or air volume is different from that in the "technical parameter table", please specify it in the order contract; (3) The unit is equipped with refrigerant at the factory and does not need to be filled on site:
(4) The 100% fresh air unit does not bear the room load of the air-conditioned area and adopts the energy level of the air supply temperature control unit;
(5) If you need to prefabricate the unit foundation, please refer to the "unit foundation drawing" for production:
(6) In order to better serve you, please specify the place of use and season of use before ordering. We will have the opportunity to provide you with a more stable and reliable control system: (7) During the installation and commissioning of our products, you can ask our company for technical support:
(8) Our company adheres to the principle of continuous improvement of products. Some improvements in product specifications, performance, and materials may not be able to inform you. Please understand. Please keep in touch with our company to obtain the latest information.
Information to be provided when ordering the unit:

Customers can select products according to specific requirements (cooling/heating capacity, air volume, external static pressure, etc.) with reference to the sample parameters. For units with air volume, cooling capacity, external static pressure and other functions outside the sample range, non-standard selection is required. You can contact the head office or local branches.
VI. Unit Technical Parameters

Heat pump type, single cooling type (performance parameter table 1)

Remarks:
1. Cooling capacity rating conditions: OA: DB(A)=35°C; RA: DB(A)=27°C, WB=19°C; 2. Heating capacity rating conditions: OA: DB(A)=7°C, WB=6°C; RA: DB(A)=20°C; 3. Heat pump type and single cooling type control object is the unit return air temperature;
Auxiliary heating is an optional item. If the required auxiliary heating capacity is inconsistent with the sample, please contact our technical personnel; 4.5. The performance parameters and nameplate of non-standard products are inconsistent, and the nameplate parameters shall prevail.

VII. Unit Outline Drawing

Heat pump type, single cooling type, clean heat pump type, clean single cooling type

Heat pump type, single cooling type, clean heat pump type, clean single cooling type

New air heat pump type, new air single cooling type, new air clean heat pump type, new air clean single cooling type

New air heat pump type, new air single cooling type, new air clean heat pump type, new air clean single cooling type

New air heat pump type, new air single cooling type, new air clean heat pump type, new air clean single cooling type

Basic Description:
a. The unit base is concrete;
b. The unit must be installed on the base only after the concrete has reached the specified strength; c. The base surface should be leveled with a level, and the base dimensions must be checked and verified before installation;
Note:
The foundation of the outdoor unit needs to be considered comprehensively in combination with the installation location and the unit's shape (specific projects require specific solutions), and rainproof design should be considered during installation.

IX. Customer Wiring

Electrical Overview
Please carefully read the electrical wiring diagram and instruction manual provided. Check whether the power voltage is consistent with that specified on the unit nameplate, and check the power cord. The installation, connection, and layout of all power supply lines should meet the requirements of relevant national electrical standards. All power supply wires are copper wires. The control cable and power line should be laid separately and sheathed to prevent the power line from interfering with the control cable (line). Consider lightning protection conditions based on the actual installation location of the unit.
Note:
(1) The unit must be reliably grounded.
(2) For units using three-phase power, once put into operation, the power phase sequence must remain unchanged.
Controller (Wire Controller) Installation
The wire controller can be installed directly on the wall using a standard 86-type box. The connection between the wire controller and the controller uses RWP4X0.5mm2 (four-core cable). Consider pre-embedding during installation, and choose the installation location reasonably.
Controller (Wire Controller) Installation
 

X. Variable Operating Condition Performance Correction Coefficient

When the operating conditions of the unit are different from the standard operating conditions, the refrigeration capacity value needs to be corrected as follows: Refrigeration capacity correction coefficient under different operating conditions (except for new air handling units):

XI. Unit Installation Technical Requirements

Before installing the air conditioning unit, please carefully read the following instructions to avoid unnecessary damage to the unit: General requirements

(1) When handling and moving the unit, keep it as horizontal as possible, do not tilt more than 30 degrees, hoist from the bottom support frame hoisting hole, and the top should have support rods to avoid damaging the equipment. (2) The unit can be installed on the roof or outdoor courtyard, and the supporting surface must have sufficient strength to withstand the weight of the unit during operation;
(3) The unit should not be installed in places with corrosive gases and high humidity,
(4) The unit installation location must have sufficient space for heat dissipation and convenient access for maintenance personnel;
(5) When the unit is in place, appropriate vibration damping devices should be installed under the unit; the roof and floor where the unit is installed should have sufficient strength and levelness to support the unit. Incorrect installation will lead to additional noise and vibration;
(6) The unit is factory-assembled, and the refrigerant has been fully charged, and no secondary charging is required on site;
(7) Power wiring must comply with local regulations, voltage fluctuations must not exceed 10% of the rated voltage, three-phase power phase imbalance is within 2%, and power lines should be wired separately and not shared with other lines
;
(8) The weight of the air ducts and water pipes connected to the unit cannot be borne by the unit;
(9) The air conditioning unit shell should be reliably grounded;
(10) Consider lightning protection based on the actual installation height of the unit,
Water Trap Installation
The evaporator in the air handling section of the unit is under negative pressure. To ensure that the condensate is discharged smoothly, a water trap must be installed in the condensate pipe. The water seal height difference can refer to the water seal schematic diagram. At the same time, the condensate pipe should be kept unobstructed, and the drainage slope should be > 0.005. The water trap is made as shown in the figure below: