Damatajhiz Air Handling Unit Model DT-AHU-500

Choose and Purchase Guide for the 50,000 CFM Damatajhiz Air Handling Unit Model DT-AHU-500

The Air Handling Unit (AHU) produced by Damatajhiz is available in various models ranging from 2,500 CFM to 50,000 CFM. These units are designed in different configurations, including single-zone and multi-zone (multi-zone), horizontal, vertical, and L-shaped designs.

Important Note: The dimensions of the Damatajhiz AHU listed in the technical specifications are based on the horizontal model and include two cooling and heating coils, as specified in the technical data table.

The Damatajhiz Air Handling Unit model DT-AHU-500 with a 50,000 CFM capacity is designed and manufactured by Damatajhiz. It is suitable for regulating temperature, humidity, and ventilation in large centers, conference halls, hospitals, offices, and other similar spaces.

Advantages of the Damatajhiz 50,000 CFM Air Handling Unit (Model DT-AHU-500)

• The unit's body is constructed with a double-layer design and fully thermal insulation.
• Uses heat-resistant polyamide fiber connectors and corners.
• Electrostatic powder-coated finish on the unit's body with a thickness of 60 to 80 microns.
• The fan and motor are connected to the body using vibration isolators and canvas to prevent noise and vibration.
• Coils are made with copper pipes and aluminum fins, with a fin density of 8 to 14 fins per inch (FPI).
• The units are available in standard models ranging from 2,500 CFM to 50,000 CFM, with higher capacities available on a custom basis.
• Siemens (Germany) or Motogen (Iran) electric motors with IP55 protection class and Class F thermal insulation.
• The columns and dampers are made from aluminum profiles coated with 6063 alloy, in accordance with the AROSIO (Italy) design.
• Components are connected with bolts, and rubber seals are used for airtight and waterproof connections.
• The unit is equipped with a variety of water coils (cooling and heating), steam coils, and direct expansion (DX) coils based on requirements.
• Features an advanced filtration system (including multi-layer aluminum filters, bag filters, HEPA filters, etc.) for complete air purification.
• Equipped with dampers for fresh air intake, return air, a mixing chamber for fresh and return air, and, if necessary, exhaust dampers.
• Uses various centrifugal fans (Airfoil, backward, forward) with static and dynamic balancing from brands like Nikotra or similar.
• Available in single or multi-zone models (with airflow control terminal boxes in ducts) and in vertical, horizontal, or L-shaped configurations based on installation site and customer requirements.

Advantages and Features of Damatajhiz Air Handling Unit Model DT-AHU-500

• Customer Needs: Damatajhiz offers a wide range of air handling units in various capacities, so customers can easily select the required unit for their project. The company's AHUs come in 14 main sizes.
• Long Lifespan: The use of high-quality galvanized steel sheets, precise aluminum dampers, complete and proper insulation, adequate lubrication of all mechanical components and fan bearings, as well as the use of durable aluminum profiles contribute to the long lifespan of Damatajhiz air handling units.
• Quiet Operation: With the design and use of precise fan blades with specific angles for all capacities in centrifugal models (backward and forward) or plug fans, along with complete internal body insulation using high-density polyurethane foam, Damatajhiz AHUs operate quietly and efficiently.
• Ease of Installation and Maintenance: Despite having a robust and reliable structure, Damatajhiz AHUs are designed for easy and quick access to the internal components. Inspection doors are conveniently placed for easy periodic servicing, part replacement, and potential repairs.

Technical Specifications of Components Installed in the Damatajhiz AHU Model DT-AHU-500

1. Fan:

• The fan is the primary component of the AHU, responsible for drawing air into the unit, passing it over the cooling coil (in summer) and heating coil (in winter), and through the filtration system, finally delivering conditioned air to the desired space.
• The fan used in the Damatajhiz 50,000 CFM AHU is made of aluminum with special angles for quiet operation and is a centrifugal type. Depending on the order and requirements, the fan can be forward, backward, or plug-type (used in hygienic AHUs).

2. Electric Motor:

• The motor is the sole driving force inside the AHU. Damatajhiz uses high-quality electric motors from top Iranian and European brands with a long lifespan and warranty.
• The motor's power and capacity depend on the airflow volume and pressure drop of the AHU. For higher capacities and pressure drops, the motor power increases.
• Damatajhiz's electric motors are available in two speeds: 1450 RPM and 2900 RPM. For applications requiring variable speed, an inverter drive can be installed to control the fan speed (constant-speed AHUs are called CAV, and variable-speed units are VAV).

3. Base Frame:

• The main frame of the Damatajhiz AHU is made from high-quality C-channel steel and fully coated with multiple layers of paint after welding and grinding. To prevent vibration, high-quality rubber isolators are used in the design of the base frame.

4. Structure:

• The main structure of the Damatajhiz 50,000 CFM AHU is made of sturdy aluminum profiles with anti-corrosion properties. All profiles are completely sealed and insulated to prevent heat and cold loss.

5. Insulation:

• To reduce noise and ensure quiet operation, as well as prevent heat and cold loss, all internal surfaces and the body of the Damatajhiz AHU are fully insulated with high-density polyurethane.

6. Body:

• The body of the Damatajhiz AHU consists of an inner and outer wall.
• The outer wall is made of high-quality 0.5mm thick galvanized steel, and the inner wall is made of either galvanized steel or stainless steel, depending on the capacity and customer's request.

7. Filtration:

• An important feature of the Damatajhiz AHUs is the air filtration system. Clean, dust-free air is essential for human health, and Damatajhiz AHUs feature advanced filtration systems.
• The air first passes through multi-layer aluminum filters with a honeycomb mesh arrangement. These filters are washable and designed to remove dust and particulate matter. Damatajhiz also uses pleated filters, bag filters, and HEPA filters for finer filtration, depending on customer requirements.

8. Plated Filter:

• One of the important features of Damatajhiz air handling units is the use of plated filters.
• The plated filters installed in Damatajhiz air handling units are capable of fine filtration, effectively removing dust, fine particulate matter, and pet dander from the air. These filters are placed as a secondary layer in the filter box of the AHU.

9. Bag Filter:

• All Damatajhiz air handling units, regardless of capacity, are equipped with bag air filters (also known as bag filters). These bag filters serve as the final stage of filtration in AHUs used for air conditioning and ventilation purposes.
• Bag filters are the most commonly used filters in HVAC systems, designed to enhance and purify the air in the desired space. The construction of these filters consists of high-quality cotton and linen fabrics, with a high density (providing greater absorption capacity).

10. Additional Filters:

• In industries such as pharmaceuticals, healthcare, hospitals, operating rooms, electronics, military, and others that require sterile, highly purified air free from dust, pollen, allergens, viruses, bacteria, and fine particles ranging from 2 to 0.3 microns, special filters such as HEPA, ULPA, EPA, and UV filters must be used in the air handling units.
• Damatajhiz offers the option to incorporate these additional filters into the air filtration system of its AHUs, ensuring air that is highly purified, sterile, and free from viruses, bacteria, allergens, and other harmful particles. The company is equipped to design and manufacture hygienic and medical-grade AHUs for critical projects in the pharmaceutical, healthcare, military, and other sectors, in various capacities.

11. Coil:

• The coils are one of the key components of the Damatajhiz AHUs.
• Their primary function is to either cool or heat the air to the required temperature.
• These coils are designed and manufactured with high-quality copper tubes and aluminum or copper fins, based on customer requirements.
• Damatajhiz offers four types of coils: water and gas (DX) for cooling and electric and steam coils for heating.

12. Custom Equipment:

• To achieve better and more precise control over the performance of the air handling unit in sensitive and specialized applications, various types of equipment and controllers can be used. The performance of these systems directly influences the quality of the air temperature output from the AHU.
• At Damatajhiz's specialized facility, we offer the ability to customize air handling units according to the buyer's specific needs, utilizing these advanced equipment and controllers, ensuring that the unit meets the desired performance standards under the following conditions:

13. Damper Motor:

• The Damatajhiz air handling unit model DT-AHU-500, with a 50,000 CFM capacity, is equipped with an electric motor for precise control of the fresh air volume and its mixing with the return air. This control system allows for intelligent regulation of the airflow based on specific requirements.

14. Motorized Valve:

• The unit also allows for the installation of a motorized valve (electric valve) on the cold water inlet pipe to the cooling coil and the hot water inlet pipe to the heating coil. This valve regulates the volume of water entering the coils, precisely controlling the temperature of the air in both summer (cold air) and winter (warm air) conditions. This feature ensures that the system operates efficiently, contributing to significant energy savings and reduced operational costs.

15. Inverter:

• For high-capacity air handling units with high airflow requirements, Damatajhiz provides the option to integrate an inverter. The inverter allows for precise control of the fan motor speed and the volume of air entering the desired space. This provides more accurate control over the airflow while also contributing to energy savings and lower operational costs.

16. Differential Pressure Switch:

• In applications where air handling units are used in high-sensitivity environments such as medical, pharmaceutical, military, and similar fields, it is recommended to use a differential pressure switch between the two sides of the air filtration system. The function of this switch is to monitor the pressure difference across the filtration system.
• If the filtration efficiency decreases and a filter replacement or cleaning is required, the pressure difference between the two sides of the filtration system will exceed a predefined threshold, indicating a clogged filter. This will be displayed in the monitoring system or alerted via an alarm sound.

17. Hygrometer (Humidity Controller):

• With the installation of a hygrometer controller on Damatajhiz air handling units, the humidity level of the air exiting the unit is controlled. The hygrometer ensures that when necessary, the air handling unit will activate the humidification process to maintain the required humidity level, preventing excessive increases or decreases in the output air humidity.

18. Temperature Sensor:

• The temperature sensor in Damatajhiz air handling units is responsible for detecting the desired temperature of the outgoing air and sending this information to the thermostat or anti-freeze system.
• If the temperature exceeds or falls below a certain limit, the control system sends the appropriate signal to adjust the operation of the unit to maintain the desired temperature.

19. Particle Sensor:

• This component is used in hygienic (sanitary) air handling units, particularly when sterile and clean air is required. The particle sensor measures the exact concentration of particles suspended in the air exiting the unit.
• If the particle levels or characteristics in the air do not meet required standards, the system will take corrective action and issue a warning.

20. Dampers:

• Air dampers are made of aluminum and have airfoil-shaped blades positioned in opposing directions. Their function is to control and regulate the ratio of fresh air mixed with return air entering the air handling unit. The dampers are equipped with durable polypropylene gears for rotation.
• Additionally, to prevent air leakage, the edges of the dampers are fully sealed using high-quality gaskets. Motorized damper options can also be installed upon customer request.

21. Inspection Door:

• For easy and secure access to the internal components of the air handling unit for regular maintenance, inspections, and potential repairs, all Damatajhiz air handling units are equipped with a hinged inspection door. The door features a polypropylene hinge and handle with complete air sealing to ensure reliability and ease of access.

Installation Notes for Air Handling Units

• It is mandatory to install a floor drain in the air handling unit room to facilitate cleaning and regular maintenance.
• After installing the air handling unit, it is essential to prevent vibration transmission from the unit to the surrounding area by installing vibration isolators, such as rubber mounts or plastic foam, on the foundation.
• To allow for the potential replacement of the air handling unit coil during the long-term operation of the system, it is required, according to engineering standards, to leave a space equal to 1.5 times the width of the unit on one side of the installation location.

Important Points When Requesting a Quote for Air Handling Unit

• Installation site
• Return air volume
• Whether the AHU is top or bottom discharge
• Airflow capacity
• Coil thickness, body sheet, and frame specifications
• Unit dimensions (horizontal or vertical)
• Coil row numbers and fin density
• Fan static pressure

Ordering and Warranty for the 50,000 CFM Damatajhiz Air Handling Unit Model DT-AHU-500

• The Damatajhiz 50,000 CFM AHU Model DT-AHU-500 comes with a 15-month Warranty and 10 years of after-sales service.
• Damatajhiz offers guaranteed specifications and prices for all AHUs, ensuring customers enjoy the best purchasing experience.
• For more details on warranty and technical specifications, please visit the "Technical Specifications" tab on the product page.

"We look forward to your contact and are eager to assist you at the Damatajhiz specialized facility."