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Fresh Air Introduction.
Fresh Air Introduction. An optional
fresh air (50%+) a hot gas bypass and HP fan speed controller are recommended and are available as options.
fresh air (50%+) a hot gas bypass and HP fan speed controller are recommended and
Peace of mind. The manufacturer operates a quality management system that conforms to international standard like CE,
Peace of mind.
The manufacturer operates a quality management system that conforms to international standard like CE,
ISO14001, ISO9001:2000. LARK products have been chosen, against worldwide competition, for use in some of the most
ISO14001, ISO9001:2000. LARK products have been chosen, against worldwide competition, for use in some of the most
exclusive projects — chosen because of
exclusive projects — chosen
Easy service. Quick release fasteners are provided on
Easy service.
Quick release fasteners are provided on electrical and compressor panel.
Quiet design. Apartments
Quiet design.
Apartments are provided on electri
Components or Assembly Descriptions
Components or Assembly Descriptions
A) Quiet operation. The packaged Rooftop series are basic constructed and engineered with noise reduction as a first
A) Quiet operation.
consideration, low noise mounted fans are used, 15mm wave type acoustic Insulation for compressor section and
consideration, low noise mounted fans are used, 15mm wave type acoustic Insulation for compressor section and
compressors are mounted on vibration isolators.
compressors are mounted on vibration
B) Low Cost Installation. Units are factory assembled and pre-charged, with a single
B) Low Cost Installation.
to the job site they are ready to be
to the job site they are ready to be lifted to their operating position through the lifting supports availabl
C) Capacities to Fit. There is a large production line of packaged
C) Capacities to Fit.
Hz refrigeration tons at nominal conditions.
Hz refrigeration tons at nominal conditions.
D) Casing. Heavy grade steel casing with polyester epoxy powder electrostatic oven-baked paint of coating finish, designed
D) Casing.
Heavy grade steel casing with polyester epoxy powder electrostatic oven-baked paint of coating finish, designed
for outdoor installation with 10mm insulation for evaporator section only. All units are provided with an 8mm thickness
for outdoor installation with 10mm insulation for evaporator section only. All units are provided with an 8mm thickness
aluminum frame filter that slides out or easy cleaning or replacement.
aluminum frame filter that slides out or
E) Compressor. The compressor used is hermetic refrigerant gas cooled, with internal thermal protection in each phase,
E) Compressor.
The compressor used is hermetic refrigerant gas cooled, with internal thermal protection in each phase,
scroll type. The terminal boxes are rain tight, starting is direct-on-line. With high efficiency, low sound, so as to match all
scroll type. The terminal boxes are rain tight, starting is direct-on-line. With high efficiency, low sound, so as to match all
other LARK products' reliability and efficiency.
other LARK products' reliability and efficiency.
F) Evaporator and Condenser Coils.
F) Evaporator and Condenser Coils. The evaporator and condenser coils are designed to
optimum performance at all design conditions. Coils are
optimum performance at all design conditions. Coils are manufactured from seamless copper tubes
into aluminum f
into alum
inum fins.
ins. All
undergo dry chemical cleaning after manufacturing for optimum system cleanness.
undergo dry chemical cleaning after manufacturing for optimum system
G) Direct Driven Condenser Axial Fans.
G) Direct Driven Condenser Axial
shaft. All fans are selected for optimum efficiency and for maximum sound power reduction. Fan blades are made for
shaft. All fans are selected for optimum efficiency and for maximum sound power reduction. Fan blades are made for
maximum corrosion resistance, and are statically and dynamically balanced before Installation. LARK tries its bests to
maximum corrosion resistance, and are statically and dynamically balanced before Installation. LARK tries its bests to
ensure the low noise
ensure the low noise operation with high efficiency
H) Condenser Fan Motor. All fans
H) Condenser Fan Motor.
with class "IP56" electrical insulation.
with class "IP56" electrical insulation.
I) Belt Drive Evaporator Fan.
I) Belt Drive Evaporator Fan. Fans are of the centrifugal type that is designed for maximum efficiency for uniform air
distribution. V
distribution. V
belt driven with variable pitch pulley as optional. All fans are statically and dynamically balanced to ensure
belt driven with variable pitch pulley as optional. All fans are statically and dynamically balanced to ensure
－ －
quiet operation and smooth performance.
quiet operation and smooth performance.
J) Evaporator Fan Motors. Motors are of the
J) Evaporator Fan Motors.
base with a flexible connection at the fan/casing interface. All fan motors of direct-driven are of the 3-speed type, highly
base with a flexible connection at the fan/casing interface. All fan motors of direct-driven are of the 3-speed type, highly
efficient induction type motors, totally enclosed air-cooled, squirrel-cage type, internal thermal current protected and with
efficient induction type motors, totally enclosed air-cooled, squirrel-cage type, internal thermal current protected and with
class "B" insulation. Fan motors with V-belt-driven type are of 1 speed type.
class "B" insulation. Fan motors with V-belt-driven type are of 1 speed
K) Filters
K) Filters
An optional fresh air
fresh air damper is
damper is available f
because of their proven efficiency, durability
their proven efficiency, durability, performance, reliability and value.
are provided on electrical and compressor sect
WITH ECONOMIZER
WITH ECONOMIZER
IS OPTIONAL
IS OPTIONAL
The packaged Rooftop series are basic constructed and engineered with noise reduction as a first
isolators.
Units are factory assembled and pre-charged, with a single point electrical connection. On arrival
lifted to their operating position through the lifting supports available on the units.
There is a large production line of packaged units, with capacities ranging from 9.9 to 188.5kW for 50
easy cleaning or replacement.
The evaporator and condenser coils are designed to deliver their respective duties at
All coils ar
coils are tested
e tested at 30kg/cm
at 30kg/cm
Fans. All condenser fans are of the
All condenser fans are of the axial type, which are directly mounted on the motor
operation with high efficiency. All condenser fans are equipped with wire guards.
All fans motors are
motors are of totally
Fans are of the centrifugal type that is designed for maximum efficiency for uniform air
Motors are of the totally enclosed induction type, with fan motor assembly placed
totally enclosed induction type, with fan motor assembly placed on a floating
available for most
or most models. F
models. For applications
, performance, reliability and value.
electrical and compressor panel.
cal and compressor section, low noise.
ion, low noise.
units, with capacities ranging from 9.9 to 188.5kW for 50
manufactured from seamless copper tubes mechanically expanded
2 2
(450 Psi) air pressure,
(450 Psi)
air pressure, under water
cleanness.
axial type, which are directly mounted on the motor
. All condenser fans are equipped with wire guards.
of totally enclosed air-cooled,
enclosed air-cooled, internal thermal
type.
or applications using high
using high proportions of
are available as options.
WITH CE CERTIFICATE
WITH CE CERTIFICATE
point electrical connection. On arrival
e on the units.
deliver their respective duties at
mechanically expanded
under water to avoid
to avoid leakage. They
leakage. They also
internal thermal current overload
current overload protected,
proportions of
also
3 3
protected,
on a floating
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