DESCRIPTION

Evaporator blower units are designed with two distinct mod- ules to provide maximum application flexibility. The 25, 30 and 40 ton units are shipped as single packages with the blower module mounted on top of the coil module, The blower module can be repositioned in the field to meet almost any installation requirement. Blower and coil modules for the 50 ton units are shipped separately to simplify handling. These modules can be connected in the field with the same flexibility as the smaller units.

The blower module includes the blower wheels and room for a field-mounted motor and drive. The coil module includes direct expansion coils, 2 in. throwaway filters, liquid line sole- noid valves for both capacity reduction and pumpdown, ther- mal expansion valves, distributors and a condensate drain pan.

Every evaporator coil is pressurized with air to 325 psig and leak tested under water. After the headers are brazed onto the coil and the coil is installed in the unit, the coil is pressur- ized with a combination of Refrigerant-22 and nitrogen to 150 psig for pressure testing and additional leak testing. After the coil is evacuated and dehydrated, it is pressurized with a holding charge of Refrigerant-22 for storage and/or shipping.

Steam coils, hot water coils, base sections, suspension hard- ware, blower motors and drive packages are available as field-installed accessories to provide additional application flexibility.

These evaporator blowers, combined with condensing units, provide years of quiet, efficient and dependable operation. These units are manufactured under ISO 9001 Quality Sys- tem Certification.

For Indoor Unit Installation details, please see document 035- 18496-000.

MODULAR DESIGN

These evaporator blowers can be arranged for a variety of air discharge patterns in either the horizontal or vertical position.

FIGURE 2: UNIT INSTALLATION

036-21335-002-A-1102

Figure 2 shows three of the common installation arrange- ments. Refer to the unit installation instructions for other pos- sibilities.

Units may be bottom-supported or ceiling-suspended and can be arranged to meet almost any space or duct require- ments. Each unit is available with a choice of blower motors, drive packages and other accessories to make them suitable for most applications.

FACTORY-MOUNTED COMPONENTS

PART LOAD OPERATION These evaporator blowers have multiple coils with pre-piped distributors, expansion valves and solenoid valves. Field modifications are not required for part load operations. Capacity reduction not only provides economical operation, but also maintains more even temper- ature and humidity levels in the conditioned space.

EASY SERVICE Serviceable expansion valves are provided on every unit. These superior valves are factory-installed to provide many years of trouble-free operation. If service is required, it is not necessary to unbraze any joints.

PUMP-OUT Evaporator blowers include a solenoid valve for non-recycling pump-out. When a cooling requirement in the conditioned space is needed, the refrigerant is pumped into the high side of the system before unit start-up.

ACCESSORIES

BASE SECTIONS (25, 30 and 40 ton only: Base sections can be used to elevate units above the floor. If desired, out- door air may be introduced through these sections by cutting an access opening to accommodate the outdoor air duct con- nection. These bases have a durable finish to match the evaporator blower unit. They may have to be insulated for certain applications.

SUSPENSION PACKAGES: These accessories can be used to suspend horizontal units from above without interfering with access to the unit. They can also be used for elevating a floor-mounted unit (either horizontal or vertical) to provide additional height for the installation of a trap at the conden- sate drain connection. All suspension packages can be used with vibration isolators.

HOT WATER COILS: Drainable water coils are available for field installation between the blower and the coil modules of both horizontal and vertical units. Since their casings match the dimensions and the finish of the basic units, they become an integral part of the unit after installation. The coils slide out of their casings for easy installation. Coils have copper tubes that have been mechanically expanded into aluminum fins. Both headers are located on the same end of the coil. Coils are leak-tested at 325 psig under water and dried before their connections are capped for storage and shipping.

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Unitary Products Group

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York LB360, 600, LA300, 480 manual Description
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480, 600, LA300, LB360 specifications

York LB360, LA300, 600, and 480 are part of the innovative line of air conditioning and heating solutions developed by Johnson Controls under the York brand. These models are specifically designed to cater to the diverse needs of commercial and industrial applications, delivering high performance, energy efficiency, and reliability.

The York LB360 is an advanced rooftop unit that combines robust construction with cutting-edge technology. One of its main features is its remarkably high-efficiency variable-speed compressor, which allows for precise temperature control while minimizing energy consumption. This model is ideal for medium to large commercial spaces, as it offers flexible configurations and a wide range of cooling capacities, ensuring optimal performance in various climates.

The LA300, on the other hand, is highly regarded for its incredibly quiet operation and compact design. It features advanced sound-dampening technologies that significantly reduce noise levels, making it a suitable choice for environments where low sound emissions are critical, such as schools, hospitals, and offices. The LA300 also integrates smart controls that allow for remote monitoring and management, enhancing overall operational efficiency.

The York 600 series is engineered with durability and serviceability in mind. Its modular design simplifies maintenance, allowing technicians to quickly access critical components. This series includes features like integrated economizers and variable frequency drives, which boost energy efficiency by optimizing airflow and compressor operation based on real-time conditions. The 600 series units are particularly advantageous in large facilities requiring reliable year-round climate control.

Finally, the York 480 model emphasizes advanced control capabilities. It uses cutting-edge microprocessor technology to enable sophisticated diagnostics and performance tracking, thereby reducing downtime and maintenance costs. With an option for web-based control, users can conveniently adjust settings and monitor the system from any location. This model is perfect for facility managers looking for a high level of control over their heating and cooling systems.

In summary, York's LB360, LA300, 600, and 480 models exemplify the brand's commitment to innovation, efficiency, and flexibility in climate control solutions. These units cater to a wide spectrum of commercial and industrial needs, ensuring comfort while helping to reduce energy expenses.
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