Direct Expansion Rooftop Packaged Air Conditioner with Free Cooling

• After-sales Service: 12 Months
• Warranty: 12 Months
• Type: Central Air Conditioner
• System Type: Closed System
• Noise Level: Ultra Low
• Application Fields: Apartment, Villa, University, Library, Hospital
• Model NO.: RTU( )
• Certification: CE
• Condition: New
• Cooling Capacity: 10kw-260kw
• Refrigerant: R410A/R290/R32/R134A
• Compressor: Scroll Type
• Gas Burner: Optional
• Fresh Air: Optional
• Free Cooling: Optional
• Proof Explosion: Optional
• Heat Recovery: Optional
• Power Supply: 50Hz/60Hz
• Transport Package: Plywood Package or Plastic Film Wrapped
• Trademark: AMRTA or OEM
• Origin: China
• HS Code: 8418612090
• Production Capacity: 6000PCS/Year

Product Description

Rooftop Packaged Air Conditioner with Free Cooling 
Rooftop packaged unit with free cooling which integrates condensing part, evaporating part & control part into a whole unit, firstly promoted & applied in South America, North Europe & Australia. It is air cooled direct evaporation & expansion air conditioner, has no need on cooling water & chilled water system, dispenses with cooling tower/cooling water pump/chilled water pump,  relative pipe work, electric control & terminal equipments, saves user investment. It integrates evaporating part & condensing part into a whole unit which is installed outside to save indoor space, user will only need to install the duct, no need to connect refrigerant pipe work, it works under intellectual control without special care. Rooftop packaged unit is mainly applied to factories, schools, auditoriums, warehouses, etc.


Characteristics
Structure
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.
Hermetic compressor
High efficiency scroll compressor for the whole range, with built-in thermal overload cut-out and crankcase heater, mounted on rubber vibration dampers.
Ripple type acoustic insulation for compressor section, and thermal insulation for coil and fan section, low noise.
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.
Electric panel
Electric panel consists of breakers and contactors for compressors and fan motors, phase sequence relay and other necessary protection devices for the main components.
Easy operation line controller
Cooling/Heating/Auto
Error indication
Timing on/off
Optional
Economizer with fresh, return air dampers and fresh air hood
Free cooling function for low ambient temperature
Low ambient control device for operation of outdoor units at ambient temperatures from less than 20°C down to -10°C
BMS devices
T3 (Tropical climate)
Roof curb
Metal/aluminum filter
100% heat recovery
Evaporating section: double skin with 50mm polyurethane foam
Optional water heating coil
Metal or plastic mesh on condenser coil
Optional supply/return air configurations
Upgraded plug fan
G4 filter, plate and bag filter

Economizer and Free Cooling


It is one of the most important features of this rooftop as it maximise seasonal efficiency by reducing the use of thermodynamic cooling in mid season.
Thermodynamic cooling can be replaced by Free Cooling when outdoor temperature is below the building set point saving up to 15% on annual energy consumption.
Rooftop units are supplied with economizer and fresh air hood to improve comfort through better fresh air management and allow energy savings with free cooling.
Exhaust air
Gravity exhaust damper
Gravity exhaust damper Installed with economizer assembly, gravity exhaust damper relief pressure when outside air is being introduced in the system. It is a cheap and smart way to avoid over pressure in a building.
Power exhaust fans
Installed with economizer assembly, it provides exhaust air pressure relief when high levels of fresh air are being introduced in the system.
Interlocked to run when return air dampers are being closed and supply air blower is in operation. The extraction fans run when outdoor air dampers are at least 50% open (adjustable). It is also overload protected. A gravity exhaust damper is supplied with this option to prevent air from entering the unit during shutdown. The power exhaust fans have been size to exhaust 50% of the nominal air flow of the unit.


Technical Data
 

Model			RTU45	RTU50	RTU60	RTU75	RTU90	RTU105
Cooling capacity		kW	44.5	50	60	70	90	105
Heating capacity		kW	48.7	54.3	64	75.4	96.2	113.2
Power supply			380V / 3Ph / 50HZA
Cooling power input		kW	17	19.5	22.8	26.7	32.9	39.7
Heating power input		kW	15.6	18	21	24.8	30.4	36.7
Start current		A	168	186	175	199	197	266
Working current in cooling		A	31.7	35.6	39.9	48.3	61	70.6
Working current in heating		A	29.9	33.5	37.5	45.4	57.3	66.3
Throttle methods			Thermal expansion valve
Circuits			2	2	2	2	3	3
Refrigerant			R410A
Compressor	Type		Scroll type        380V / 3Ph / 50HZA
	Qty		2	2	2	2	3	3
Condenser side
Condenser	Type		Al+copper tube
Axial fan	Qty		1	1	1	1	2	2
	Drive		Direct drive
	Motor power	kW	0.25	0.37	0.37	0.55	0.75	0.75
	Air flow	m3 /h	4600	7800	7800	9000	12600	12600
Evaporator side
Evaporator	Type		Al+copper tube
Centrifugal fan	Qty		1	1	1	1	1	1
	Motor power	kW	3	3	4	4	5.5	5.5
	Air flow	m3 /h	7600	8500	10900	12500	16000	19500
	Drive		Direct drive			Belt drive
External static pressure(Pa)			250	250	300	300	300	300
Filter			Aluminum frame filter G3
Noise level dB(A)			73	73	73	75	74	75
Dimension	L	mm	2268	2268	2298	2298	2878	2878
	W	mm	1440	1440	1650	1650	2140	2270
	H	mm	1167	1167	1400	1400	1964	1964
Weight		kg	750	770	830	860	1160	1350

* Performance values refer to the following conditions:
Cooling: room air temperature 27.0°C DB RH 50%, ambient air temperature 35°C;
Heating: room air temperature 20.0°C DB, ambient air temperature 7°C DB / 6°C WB.
** Noise level measured by adopting average value in the noise lab with background noise of 25 dB(A), at a distance of 1.5m high fan speed.