Stars Electro Mechanical Contracting LLC

ABU DHABI, United Arab Emirates

Ducted Air Handlers provide an efficient solution to cool and heat a larger zone or entire home. When combined with an multi-zone outdoor condensing unit and additional ductless indoor units, a unique Comfort is created, providing energy efficiency, air coverage, and control.

The unit can be fully disassembled and reassembled on-site, allowing it to easily fit into closets, attics, and numerous other tight spaces.

• Rugged Steel cabinet.
• Factory configured for vertical & horizontal installation
• Multiple V shaped evaporator coil
• Slim low height design ranging from 12 to 16
• Thermostatic expansion valve is standard on all units.

In this type of system, a pump circulates water or any other liquid through the system. There are coils that are mounted in either series or parallel to facilitate maximum amount of heat transfer. This type of system is beneficial in any season.

This means that if the outside air is warmer than the exhaust air, the exhaust air pre cools outside air. And if the outside air is cooler than the exhaust air, the exhaust air pre heats the outside air, making the system more and more energy efficient.

A thermal expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in refrigeration and air conditioning systems that controls the amount of refrigerant flow into the evaporator thereby controlling the superheating at the outlet of the evaporator. Thermal expansion valves are often referred to generically as metering devices.

There are two main types of thermal expansion valves: internally or externally equalized. The difference between externally and internally equalized valves is how the evaporator pressure affects the position of the needle. In internally equalized valves, the evaporator pressure against the diaphragm is the pressure at the inlet of the evaporator, whereas in externally equalized valves, the evaporator pressure against the diaphragm is the pressure at the outlet of the evaporator. Externally equalized thermostatic expansion valves compensate for any pressure drop through the evaporator.

Internally equalized valves can be used on single circuit evaporator coils having low pressure drop. Externally equalized valves must be used on multi-circuited evaporators with refrigerant distributors. Externally equalized TXVs can be used on all applications; however, an externally equalized TXV cannot be replaced with an internally equalized TXV.

Water jackets are kept at the sides of a reciprocating engine or a gas turbine to absorb the heat generated. This heat can be used for generating steam or for heating water or fuel oil.

Booster pump packages equipped with intelligent variable-frequency controls for HVAC service in commercial, industrial and municipal buildings and structures

A range of products for steam and hydronic systems including boiler feed units, temperature regulators, vacuum breakers and steam traps

A comprehensive line of steam and hot water boiler liquid-level control products serving the demanding needs of industrial and commercial markets

A broad selection of condensate transfer equipment for low- and high-pressure steam systems

We provide energy efficient pumps, boosters, circulators, controls and other products and systems for building HVAC.

The structures served by our HVAC products and systems include data centers, manufacturing, office and apartment buildings, retail, sports complexes, central heating/chiller plants, hospitals, schools and green building projects.

Pump products and control systems for the liquid-based HVAC industry serving markets for all large commercial HVAC applications

• Optimized Performance chilled-water coil or direct-expansion for cooling, hot water, steam, or electric coil for heating; energy-efficient ECM motors.
• Flexible Design Exposed cabinet, concealed free-return cabinet, or concealed plenum-return cabinet with rear or bottom return; 2- or 4-pipe coils
• Piping packages for Fan-Coil Units Factory-assembled piping packages available
• Choice of HVAC Controls Thermostats can be analog, digital display, or programmable. Controls can be interfaced with a building automation system, or operate on a stand-alone basis.
• Excellent IAQ Low sound levels; sloped drain pans are also cleanable; cabinets can be insulated with foil-faced fiberglass or closed-cell foam
• Superior Serviceability Fan deck and drain pan can be removed for servicing.

• Best Thermal Performance Use of Ultra-Thermal Break construction reduces energy losses and eliminates exterior sweating.
• Low Leakage Unit design and materials limit air leakage to astounding 0.5% at +/-10 w.g. static pressure
• Enhanced IAQ Cleanable construction, timed filter delivery, and ultra-violet germicidal irradication raise IAQ to a new level of clean
• Quiet Operation An array of construction and isolation techniques help control vibration and transmission of noise
• Factory-Packaged Systems Pre-packaged systems are available for water, steam, and refrigeration. This ensures that systems arrive at the jobsite fully commissioned and ready to go
• Suitable for Indoor & Outdoor installations
• Static Pressure upto 1000 Pa
• Extruded aluminum profile framework
• Polyurethane panel insulation (mineral wool option available)
• Standard casing made of 50mm thick double skin panels
• Heat Recovery Wheel, Heat Pipe & Plate Heat Exchanger option available

The HVAC systems compressor generates heat by compressing refrigerant. This heat can be captured and used for heating domestic water. For this purpose a heat exchanger is placed in between the compressor and the condenser.

The water that is to be heated is circulated though this heat exchanger with the help of a pump whenever the HVAC system is on.

Condensing units are the perfect refrigerant components for all air conditioning applications that use central station air handling. They are designed for outdoor installation. Each unit includes hermetic scroll compressors, an air-cooled condenser, and a weather resistant microprocessor control center, all mounted on a formed steel base.

• High Efficiency The industrys highest design and off-design efficiencies in this capacity range
• Environmentally Responsible Uses R-410A, an environmentally responsible refrigerant.
• Superior Reliability Scroll-compressor design has fewer moving parts, improving reliability
• Powder coated metallic construction
• Units fitted with Reciprocating/Scroll Compressors
• HP & LP a standard feature

A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. It is used in air conditioning equipment, as an automobile supercharger (where it is known as a scroll-type supercharger) and as a vacuum pump.

A scroll compressor operating in reverse is known as a scroll expander, and can be used to generate mechanical work from the expansion of a fluid, compressed air or gas. Many residential central heat pump and air conditioning systems and a few automotive air conditioning systems employ a scroll compressor instead of the more traditional rotary, reciprocating, and wobble-plate compressors.

A scroll compressor uses two interleaving scrolls to pump, compress or pressurize fluids such as liquids and gases. The vane geometry may be involute, Archimedean spiral, or hybrid curves.

Often, one of the scrolls is fixed, while the other orbits eccentrically without rotating, thereby trapping and pumping or compressing pockets of fluid between the scrolls. Another method for producing the compression motion is co-rotating the scrolls, in synchronous motion, but with offset centers of rotation. The relative motion is the same as if one were orbiting.

Another variation is with flexible (layflat) tubing where the archimedean spiral acts as a peristaltic pump, which operates on much the same principle as a toothpaste tube. They have casings filled with lubricant to prevent abrasion of the exterior of the pump tube and to aid in the dissipation of heat, and use reinforced tubes, often called hoses. This class of pump is often called a hose pumper.