Specifications Carrier 38RA-140B:
Main functions:
Key Features:
| Measurements | 2071h2278h1332 |
| Maximum cooling performance | 133 |
| Type of Freon (refrigerant) | HFC-407C |
Additional Information:
| Production | USA |
| Warranty | 2 years |
| Additionally | 11 200 l / s |
Condensing Unit Carrier 38RA-140B air-cooled condenser
The new series of condensing units 38RA built with the latest technical developments: the units are equipped with scroll compressors, low-noise fans made of composite materials and a microprocessor controller. Working material is environmentally friendly refrigerant HFC-407C. Condensing units series 38RA have all the elements of the refrigeration circuit and control systems necessary for a rapid connection to the air handling unit direct cooling.
Design features
The units are equipped with a series 38RA ventilyatoramivtorogo generation andquot;Flying Birdandquot;. This is an extremely quiet fans, not emitting a low-frequency noise, especially annoying human hearing. By reducing the load or when the temperature outside air fans vtomaticheski switch to low speed. The additional reduction in fan noise achieved by mounting the fan is not on top of the unit, but on a rigid base frame, which prevents the transfer of vibration of the unit and allows for its flat top panel more aesthetic.
Scroll compressors run very quietly and not create vibrations. They are reliable and durable. The engine is cooled scroll compressor suction gas. When connected incorrectly, electrical wires inside the protective device protects the compressor from damage. In addition, these compressors do not require any maintenance. Having two compressors in each refrigeration circuit (except for size 38RA 040) reduces the starting current and power consumption at part load.
Environmentally friendly, non-ozone layer HFC_407C refrigerant used in air conditioners small and medium size instead of refrigerant R_22. Carrier has conducted extensive testing and made sure that the units operating on the refrigerant HFC_407C, have the same reliability, as well as working on the refrigerant R_22, and even slightly better performance.
The unit is equipped with everything necessary to make it easier to connect the unit directly to the Air Cooling filter drier, moisture indicator, high and low pressure, as well as solenoid valves for vacuum (installed upstream of the evaporator). All pipes cooling circuit connected by welding. Capillary tubes, which occurred earlier leak, now replaced. From size 38RA 090 units have two independent refrigerant circuits, which provides more flexible control at part load.
Series 38RA units are designed for year-round operation and function without additional hardware at up to 10 ° C. The fans controlled by the electronic controller.
Easy connection to the mains.
Series 38RA units as standard equipped with main switch, the power supply is provided from 3_faznoy networks with isolated neutral over a single cable.
The control circuit 38RA unit powered by a standard low voltage transformer (24). You can connect other electrical components and air-conditioning system: room thermostat, solenoid valves for vacuum and blower air handling unit.
Wide body panels are easy to remove without the use of special tools, and hinged door control panel provides easy access to internal components.
Controller andquot;PRO_DIALOG Plusandquot;
Condensing unit controller controls 38RA andquot;PRO_DIALOG Plusandquot;, to be connected to the low voltage thermostat with external temperature sensor andquot;Carrier TSTATandquot; (optional).
Controller Functions andquot;PRO_DIALOG Plusandquot;
Control of the compressor: the alignment of time and number of compressor starts, protection against rapid restart, ensuring minimum operating time required to return oil to the compressor. Injection pressure control fan speed.
Solenoid valve under vacuum evaporator (valves supplied with the unit).
Control of all security devices the condensing unit and the message changes the thermostat readings outside temperature.
Thermostats Carrier
Electronic thermostat with external temperature sensor andquot;TSTATandquot; () enables remote control units компрессорно_конденсаторными 38RA. The company delivers programmable and non-programmable thermostats.
Description of the system
Компрессорно_конденсаторный unit with air-cooled condenser is designed for outdoor use, equipped with hermetic scroll compressors, low-noise axial fans and microprocessor controller. The units are designed for use with non-invasive ozone refrigerant HFC_407C.
Quality assurance
Series 38RA units comply with the following requirements of the European Community:
- requirements for machine parts 98/37/CE, as amended;
- requirements for low-voltage electrical equipment 73/23/EEC, as amended;
- requirements of the EMC Directive 89/336/EEC, as amended, and the applicable recommendations of European standards;
- Safety of machinery, electrical equipment of machines, general rules: EN 60204_1;
- electromagnetic radiation: EN 50081_1;
- Conducted Emissions: EN 50081_2;
- Immunity: EN 50082_2.
38RA units are designed and tested in accordance with the system to maintain quality, certified to ISO 9001.
38RA units are manufactured in accordance with a system of measures for environmental protection, certified to ISO 14001.
The documented specifications defined according to standard Eurovent.
Before shipment, all units undergo a performance test.
Compressors
Hermetic scroll compressor with only three moving parts has 2_polyusnym motor cooled by suction gas, the electric motor has a built-in overload relay and (or) switch from overheating. Crankcase heater to prevent dilution of the oil coolant. The compressor has a sight glass oil level and filled with synthetic polyester oil.
Air-cooled condenser and fan
One (models 38RA 040-080) or two (in the models 38RA 090-160) vertical sections condenser made of copper pipes with fins. Good contact with the outside tube aluminum fin provided dornirovaniem. Protective grille exchanger made of steel wire with a plastic coating.
Low noise axial fan andquot;Flying birdandquot; firm Carrier with external rotor has 11-blade impeller made of a composite material. Three-phase motor with two speeds (11.5 and 5.8 rev / s or 15.6 and 7.8 rev / s) has a built-in safety thermostat, insulation class F, degree of protection IP55.
The fan guard is made of steel wire with a plastic coating.
Air outlet - Vertical
Refrigerant circuit
Each loop set: valve on liquid line, the moisture indicator, filtr_osushitel, pressure and temperature, high pressure switch with manual reset. To seal all the elements of the refrigeration circuit are connected by welding. Connection to the suction and liquid connections shall be made by welding.
The units are supplied with one or two low-voltage solenoid valves (24) for evacuation. The valve should be installed at the entrance to the evaporator.
- 38RA 040: one solenoid valve
- 38RA 050_080: with two solenoid valves
- 38RA 090_160: one solenoid valve for each refrigerant circuit
The plant cooling circuit pressure tested, dried and filled with nitrogen.
The control panel (power and control circuit)
The control panel door is closed. On the panel are main switch, fuses and circuit breakers, contactors for compressors and fans, thermostat, transformer, low voltage (24 V) to supply chain management and the controller andquot;Pro_Dialogandquot;. Power is supplied to the panel of the three-phase single-cable network with isolated neutral.
Housing
Frame and body panels are made of galvanized steel with a polyester thermosetting powder paint svetlo_serogo color (RAL 7035). Removable panels are fixed retainers, rotates a quarter turn.
Controller andquot;Pro_Dialogandquot;
Performs the following functions:
Management
Control cooling stages, based on information received from the room thermostat.
Controller andquot;Pro_Dialogandquot; aligns time and number of compressor starts and protects the compressor from the fast reconnection.
Regulating the discharge pressure (control fan speed) based on a self-tuning adaptive algorithm.
The valves vacuum cooling circuit during stop and start the unit.
Protection
The system monitors the change in operating conditions (temperature, pressure, etc.), and controls the compressor so that the parameters remain in the work area. If the value of the parameter is outside the work area, the unit is turned off and the system reports the fault with a certain light
code (flashing warning light). Stop the refrigerant circuit or the entire unit is under the following faults:
- Low suction pressure
- High-pressure injection
- Low temperature in the intake manifold
- Overloading of the compressor motor
- Rotation of the compressor motor in the opposite direction
- Faulty temperature sensor or pressure
- Faulty controller or communication failure
- A safety device in the system user.
Remote control of the condensing unit
Remote control компрессорно_конденсаторным unit by using a room thermostat andquot;TSTATandquot;. Thermostat functions:
- Start and stop the machine (using a programmable timer or
without it)
- Select mode: cooling, heating or auto
- Setting the temperatures cooling and heating.
