DUCTED SPLIT AIR CONDITIONERS 50Hz GCUN/GDS SERIES R 407C

DUCTED SPLIT AIR CONDITIONERS 50Hz GCUN/GDS SERIES R 407C

CONTENTS General features Page 3 Components features Pages 3 to 5 Compressors Condensers Condenser fans Evaporators Evaporator fan and drive Casing-Structure Electrical control panel System protection Technical data Pages 6 to 7 R407C Extended capacity performance data Pages 8 to 13 Evaporator fan performance data Pages 14 to 16 Sound Data Page 17 Electrical Data Page 18 Units drawings and dimensions Pages 19 to 22 2

GENERAL FEATURES GAMI ducted split unit air conditioners are designed and manufactured with the following characteristics. Operating efficiently using environmental friendly R407C Operating up to 52 C ambient temperature due to efficient size of condenser coil. Easy monitoring and troubleshooting due to use of PLC control. Easy maintenance as access is provided for all the operating items. Easily accessible sight glass at the refrigeration circuits indicates the proper refrigerant charge and operation. Thermostatic expansion valve as standard for all the models,to ensure efficient operation even at variable load conditions. The evaporator fan motor and the pulleys are set for 125 pa external static pressure. Higher ESP s are also possible. (Consult the factory for details) FEATURES Operating at low noise and vibration level. Evaporator side has 10 mm thick,closed cell rubber type with aluminum foil insulation. Adjustable evaporator fan drive set for easy air flow adjustment. COMPONENTS FEATURES 1. COMPRESSORS The compressors are hermetic scroll. Scroll compressors have the following characteristics High efficiency Low sound levels. Limited wear due to few moving parts and suction gas motor cooling. Unique ability to handle liquid refrigerant in the suction line. 2. CONDENSERS The condensers are manufactured of plain seamless copper tubes 3/8 O.D mechanically bonded to corrugated aluminum fins to ensure optimum heat transfer. All the condensers are designed for the unit operation up to 52 C ambient temperature whereby the fin spacing selected (12 fpi) provides long life and maintenance free operation with the least possibility of operational blockage of the condenser. The coils are pressure leak tested by dry air pressure 35 bar(510 psig) under water. 3

FEATURES The condenser fans are axial type directly driven by external rotor motors. The motors are six pole, with class F insulation and IP 55 protection. 3. CONDENSER FANS The evaporator side of the unit is insulated with closed cell rubber type 10 mm thickness insulation. The structure permits easy access to all the working parts of the unit,so the maintenance of the unit is very easy. The combination of an external rotor motor and axial fan, on rubber isolators,with a properly dynamically balanced impeller,gives an efficient, quiet and reliable operation. The motors are factory wired to the control panel,to a separate contactor with overload for each fan. 4. EVAPORATORS The evaporators are manufactured of inner grooved seamless copper tubes 3/8 O.D mechanically bonded to louvered aluminum fins to ensure optimum heat transfer. 7. ELECTRICAL CONTROL PANEL The unit is controlled by a PLC (as optional) feature. The electrical panel enclosure is made from galvanized sheet metal electrostatic powder coated. The panel is located at the evaporator side of the unit and is being cooled by the unit cool air. Access to the panel can be made while the unit is working without any disturbance in the operation of the unit. Seamless copper tube suction headers and properly sized distributor at the refrigerant inlet along with the thermostatic expansion valve ensures smooth and reliable operation. All the evaporators are rated as per AHRI 410 standard. The coils are leak pressure tested by dry air pressure 35 bar(510 psi) under water. 5. EVAPORATOR FAN AND DRIVE The evaporator fan is forward curved centrifugal DIDW,statically and dynamically balanced,complete with shaft, self aligning and permanently lubricated ball bearings. The fan is driven by a single speed,4 pole,insulation class F and IP55 protection motor,rated for continuous operation at the rated conditions. The motor is factory wired to the control panel where a dedicated contactor is located, and is protected by an overload relay. The group of fan and motor is located on a rigid base which is isolated from the rest of the unit by rubber vibration isolators. 6. CASING/STRUCTURE. The unit casing is made of zinc coated galvanized steel sheets conforming to ASTM A653, electrostatic powder coated with approximate 75 microns coat,to ensure more than 1000 hours endurance at salt spray test as per ASTM B117. The drain pan of the unit is also manufactured with the same way as standard. 4

In the control panel the following are included. 8. SYSTEM PROTECTION Separate contactor with overload relay for each compressor. Separate contactor with overload relay for each condenser fan motor. Separate contactor with overload relay for the evaporator fan motor. PLC with backlit LCD screen for I/O status. (Optional feature) The safety features which are standard for our units and factory installed are: Low suction pressure switch High pressure switch Compressor (s) overload Condenser fan (s) overload Evaporator fan overload. FEATURES 24 V AC transformer to supply power to the PLC (Optional), the PLC inputs and the unit thermostat, with fuse protection. Phase loss and phase rotation protection device Phase loss in the power supply. All the above safety switches are controlled with the PLC (Standard feature) to ensure proper,reliable and safe operation of the unit. Power and control terminal blocks. Overcurrent protected main switch is field installed The control of the unit is made through external thermostat (optional) which provides the inputs to the PLC. The external thermostat should be powered by 24 V AC which should be taken from the unit and need to provide 24 V AC output for the system and the evaporator fan, which can operate in AUTO (controlled by the temperature) or ON (continuous on) mode Internal or duct heaters also can be controlled by the PLC (Optional) and the thermostat (consult the factory for details) NOMENCLATURE GCUN/GDS XX-D-T3-B x10 Nominal MBH C:COOLING 50 HZ D:COOLING 60 HZ T3 Climate specifications T3 (Tropical) A: REFRIGERANT R22 B: REFRIGERANT R407C 5

TECHNICAL DATA 6

TECHNICAL DATA 7

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FAN PERFORMANCE DATA 14

FAN PERFORMANCE DATA 15

FAN PERFORMANCE DATA Data highlighted in grey are within the standard motor operating range, outside that area larger motor size to be used. 16

SOUND DATA 17

ELECTRICAL DATA 18

DRAWINGS-DIMENSIONS 19

DRAWINGS-DIMENSIONS 20

DRAWINGS-DIMENSIONS 21

DRAWINGS-DIMENSIONS 22

P.O. Box : 28131, ICAD-1, Mussafah, Abu Dhabi UAE Tel : +971-2-5506777 Fax : +971-2-5506622 E-mail: info@gami.ae Website: www.gami.ae Specifications in this catalogue are subject to change without notice in order that may bring latest innovations to the customers.