ducted split air conditioners 50hz gcun/gds … · gami ducted split unit air conditioners are...
TRANSCRIPT
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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
CO
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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
FEA
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4
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
FEA
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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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Data highlighted in grey are within the standard motor operating range, outside that area larger motor
size to be used.
17
SO
UN
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ATA
*Above shown Sound data are indicative only.
Actual Sound data should be measured at site condition.
P.O. Box : 28131, ICAD-1, Mussafah, Abu Dhabi – UAE
Tel : +971-2-5506777
Fax : +971-2-5506622
E-mail: [email protected]
Website: www.gami.ae
Specifications in this catalogue are subject to change without notice in order that may bring latest innovations to the customers.