DUCTED SPLIT AIR CONDITIONERS

50Hz GCUN/GDS SERIES R 407C

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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

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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 en-

sure 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.

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 effi-

cient 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.

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.

Easily accessible sight glass at the refrigeration cir-

cuits indicates the proper refrigerant charge and

operation.

Thermostatic expansion valve as standard for all the

models ,to ensure efficient operation even at varia-

ble 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)

GENERAL FEATURES

COMPONENTS FEATURES

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The condenser fans are axial type directly driven by exter-

nal rotor motors.

The motors are six pole, with class F insulation and IP 55

protection.

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 sep-

arate contactor with overload for each fan .

4. EVAPORATORS

The evaporators are manufactured of inner grooved seam-

less copper tubes 3/8” O.D mechanically bonded to lou-

vered aluminum fins to ensure optimum heat transfer.

Seamless copper tube suction headers and properly sized

distributor at the refrigerant inlet along with the thermo-

static expansion valve ensures smooth and reliable opera-

tion.

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 bear-

ings.

The fan is driven by a single speed,4 pole ,insulation class

F and IP55 protection motor ,rated for continuous opera-

tion at the rated conditions.

The motor is factory wired to the control panel where a

dedicated contactor is located, and is protected by an over-

load relay.

The group of fan and motor is located on a rigid base

which is isolated from the rest of the unit by rubber vibra-

tion 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.

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.

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.

3. CONDENSER FANS

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NOMENCLATURE GCUN/GDS– XX-D-T3-B

x10 Nominal MBH

T3 Climate

specifications

T3 (Tropical)

A: REFRIGERANT R22

B: REFRIGERANT R407C

C:COOLING 50 HZ

D:COOLING 60 HZ

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In the control panel the following are included.

Separate contactor with overload relay for each

compressor.

Separate contactor with overload relay for each con-

denser fan motor.

Separate contactor with overload relay for the evap-

orator fan motor.

PLC with backlit LCD screen for I/O status.

(Optional feature)

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

Power and control terminal blocks. Overcurrent pro-

tected 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 evap-

orator 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)

8. SYSTEM PROTECTION

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.

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.

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KWt—Total Cooling Capacity

KWs—Sensible Cooling Capacity

KWe—Compressor Power Input

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Data highlighted in grey are within the standard motor operating range, outside that area larger motor

size to be used.

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*Above shown Sound data are indicative only.

Actual Sound data should be measured at site condition.

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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.