Industrial Air Conditioners factory
Rooftop packaged unit is single packaged type central Air Conditioning with its own cold source and air cooling. Factory assembled, tested and shipped complete with compressor, evaporator and condenser coils, fans and controls. They can be used for cooling only type, heat pump type, cooling only with electric heater type, constant temperature and humidity.Rooftop package unit, a powerful roof air conditioners widely used for cooling and heating of shopping malls, large storage space, hotels,banquet hall,theaters,cinema,clubs, Industrial buildings and Logistic centers. Using the Rooftops to arrange ventilation c partial fresh air. Roof top advantage is the lack of need for laying of freon pipes, construction of unit 鈥?it鈥檚 a package, which mounted directly on the roof of the building, or near from wall. Rooftop packaged unit air conditioner is ideal for residential, commercial and industrial applications and are available in nominal cooling capacity from 10kW to 380kW/3TON to 100Ton.
Features:
1. High efficiency.World famous Copeland scroll compressor with quick reactivity and operation stable.compressor speed is controlled directly by the control temperature.High EER
2. Fresh air inlet is available.
3. Flexible installation,whether on rooftop or on the ground.Anywhere removable as requirement without being fixed.
4. Providing easy access to system components for maintenance and service.
5. Environment friendly refrigerant R407C, R410A and R134A.
6. It can be special design based on project needed, such as vertical type, stainless steel casing etc. Mainly used for office, commercial building, supermarket etc and easily installation and maintenance.
7. Operation range of outdoor temp. is from -10鈩?to 45鈩? And if T3 tropical design, the highest outdoor temperature could be 53 鈩?
8. Sturcture: Panels and frame are made from galvanized steel protected with polyester powder painting to ensure total resistance to atmospheric agents. Direct expansion coils with condensate drain tray.
9. Centrifugal fan: Forward curve centrifugal fans for air treatment section and axial fans for condensation section. Front, side and underside air discharge of the treatment unit. High external pressure, long air supply distance.
10. Electric panel: Electric panel consists of breaker and contactors for compressors and fan motors, phase sequence relay and other necessary protection devices for the main components.
Benefits:
Compact design.
The compact design gives an aesthetic and neat appearance when installed in line of sight. Compact size benefits transport, handling and positioning on site, simplified and cheaper than traditional units.
Reliability.
All products are rigorously factory tested to ensure the top arrived condition in site. The strict testing procedure includes rain test, shipping test, shake and drop test, rigging test, coil leak test, and the whole unit running test. All units are fully factory tested; plug and play for the easier installation in site by reducing any unnecessary costs. This is our rigorous requirements of responsibility to customers to make sure the reliability of our products.
Durability.
Cabinets are constructed from galvanized steel with polyester powder coated for all weather protection. The outdoor air coils' aluminum fins could be epoxy coated for extra protection in corrosive environments, for example the salt laden sea air. External fasteners are made by stainless steel or galvanized steel as well as the corrosion resistant drain trays. 10 years anticorrosion warranty is guaranteed.
Flexibility.
The dedicated vertical or horizontal supply/ return configurations allow easy utilization on replacement jobs or new construction applications. Unit may be configured to precisely match the building requirements through the use of factory-installed options such as: integrated economizer, power air exhaust, high static pressure indoor fan and coil protection options.
Economy.
2-4 stages operation compressors are progressively switched on only as they are needed. This has the added advantage of lowing start-up current. Especially, economizer such as free cooling or heat recovery option helps to reduce the operating costs.
Safety.
The refrigeration system operates with a number of protection means: dry-filter, discharge temperature protector, liquid sigh glass, HP and LP switches, phase sequence relay, circuit breaker and contactor etc.
Low noise.
Electrical and compressor section are insulated to reduce noise. The upward discharge of condensing fans carries away effectively the operating noise. And all compressors and fans are mounted on rubber anti-vibration supports for quiet design.
Easy maintenance.
The condenser and evaporator fan motor bearings are permanently lubricated with long life, and no annual maintenance need, adding greater reliability to the unit. The service access ports are protected, externally mounted, reusable, provided on both the high and low lines for ease of evacuating and charging the system. A large, single panel covers the electrical controls makes servicing easy. The blower compartment has a large panel which will allow the blower fan assembly to slide-out for ease of maintenance and trouble shooting.
Main components
Casing
Panels are made by galvanized steel with polyester powder paint for excellent finish, weatherability and corrosion resistance. The pre-treated galvanized steel provides a better paint to steel bond, which resists corrosion and rust creep. Special primer formulas and mattedtextured finish insure less fading when exposed to sunlight. The stainless steel screws are used throughout to further reduce possibility of rusting.
Compressor
The units use high efficiency, hermetically sealed, compressors, oil return lubrication and rubber vibration damper. The thermal overload cut-out, phase sequence relay and crankcase heater are integrated as the security protection to enhance reliability and performance.
Heat exchanger.
Condenser/ evaporator coils are manufactured from seamless inner grooved copper tubes with all joints brazed mechanically bonded to aluminum fins to ensure optimum heat transfer. The standard feature represent by 桅9.52mm tubes and high hydrophilic blue aluminum fins. All coils are tested at 30kg/cm虏 (450 Psi) air pressure to avoid leakage.
External thermal expansion valve
Independent thermal expansion valve with external balance offers better refrigerant control and wider load condition.
Condenser fan
Condenser fans are direct-driven axial type, air-discharged vertically with a low level noise, which use aluminum blades riveted with corrosion resistant steel spider bracket to allow a statically balanced and smooth operation. All condenser fans are protected by wire guards, and fans motors are secured by permanently lubricated bearings against overload conditions.
Centrifugal fan Belt-drive centrifugal fans of air supply section are designed with forward-curved blades, ac asynchronous induction motors and multi-speed control for maximum efficiency and adequate airflow distribution. Motors are highly efficient inducted, with class B insulation to ensure quiet operation and smooth performance. VFD drive modulating and upgrade plug-fan are possible as option.
Filter 5 mm thickness washable Nylon filter is used as standard feature. G4 filter is available optionally.
Electric components
鈼?Direct-on-line starting contactor for the compressors and condenser fan motor.
鈼?Internal thermal protector for compressor and fan motor.
鈼?Anti-recycling protection (time delay) for compressors through microprocessor.
鈼?Crankcase heater for compressor.
鈼?Control circuit breaker and power circuit breaker.
鈼?Phase sequence relay
Defrost
Dynamic and alternate defrost function is provided to heat pump rooftop units to ensure efficient operation in winter. Units start defrost cycle when the ambient temperature is below a set temperature and repeat the defrost cycles periodically. The defrost cycle is automatically controlled by outdoor sensor. The timing and duration of defrost can be set up by a combination of timing functions on the control device
Control
standard controller provides unit control for heating, cooling and ventilation utilizing input from indoor and outdoor sensors. Quality and reliability are enhanced through the smart control and logic for:
鈼?Anti-short cycle timer prevents the unit from short cycling, considerably improving compressor life
鈼?Optional soft start avoids electrical 鈥渟pikes鈥?by using staging on fans, compressors and heaters 鈼?Interoperability with Modbus protocol allows to integrate with BMS for outstanding control benefits
鈼?Automatic lock out system on failure and reset by interruption of power supply.
鈼?Automatic defrost
鈼?Compressor lead-lag operation to ensure longer life for the compressors and equal running hours between compressors
鈼?External remote ON/OFF button for remote operation of the unit using external ON/OFF switch or connection to BMS
鈼?High and low pressure safety switch (capsule type, factory Pre-set)
鈼?Remote standard control panel with the same functions as the unit on-board control panel at a distance of 20 m
Options:
Heat recovery, Fresh air Economizer, Free-cooling, Explosion proof, Hot water coil, Electrical heater, Roofcurb Gas burner, T3 tropical condition, Medium and HEPA filter Plug-fan Emergency switch Siemens PLC controller Carel controller
Installation:
Unit location
The electric unit is designed only for outdoor installations. Choosing the location of the unit should be based on minimizing the length of the supply ducts. Consideration should also be given to availability, service access, noise, and shade. The unit installation shall avoid areas where condensate drainage may cause problems.
Setting the curb
Make openings in roof decking large enough, to allow for duct penetration and work space only. Do not make openings large than necessary. Set the curb to coincide with the openings. Make sure the curb is level. Unit must be level in both horizontal axes to support the unit and reduce noise and vibration.
Electrical
All electrical work must be carried out by a qualified and licensed electrician. Then installation must comply with the current relevant standards wiring rules and local authority requirements. Wire sizing is the responsibility of the installer, as it depends on the conditions and regulations applicable to each installation site. Refer to the electrical drawing and specification of the unit for the electrical data. The electrical installation requirements are generally as follows:
鈼?The air-conditioning unit shall be supplied directly from a distribution board through a mains lockable isolating switch.
鈼?Pre-punched holed have been provided in the unit casing for the isolating switch. Do not drill into the cabinet as piles may be located behind.
Operation
Unit operations should be controlled with thermostat, or unit controller, never at the main power supply, except for servicing, emergency, or complete shutdown of the unit.
Maintenance.
At least once each year, a trained, qualified service technician should check out the unit. Fans, evaporator coils, and filters should be inspected at least monthly.Industrial Air Conditioners factory
website:http://www.airmythac.com/industrial-air-conditioners/