Fresh Air Introduction.
Fresh Air Introduction.
An optional
An optional fresh air
fresh air damper is
damper is available f
available for most
or most models. F
models. For applications
or applications using high
using high proportions of
proportions of
fresh air (50%+) a hot gas bypass and HP fan speed controller are recommended and
fresh air (50%+) a hot gas bypass and HP fan speed controller are recommended and are available as options.
are available as options.
Peace of mind.
Peace of mind.
The manufacturer operates a quality management system that conforms to international standard like CE,
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
exclusive projects — chosen because of
because of their proven efficiency, durability
their proven efficiency, durability, performance, reliability and value.
, performance, reliability and value.
Easy service.
Easy service.
Quick release fasteners are provided on
Quick release fasteners are provided on electrical and compressor panel.
electrical and compressor panel.
Quiet design.
Quiet design.
Apartments
Apartments are provided on electri
are provided on electrical and compressor sect
cal and compressor section, low noise.
ion, low noise.
3
3
WITH CE CERTIFICATE
WITH CE CERTIFICATE
WITH ECONOMIZER
WITH ECONOMIZER
IS OPTIONAL
IS OPTIONAL
Components or Assembly Descriptions
Components or Assembly Descriptions
A) Quiet operation.
A) Quiet operation.
The packaged Rooftop series are basic constructed and engineered with noise reduction as a first
The packaged Rooftop series are basic constructed and engineered with noise reduction as a first
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
compressors are mounted on vibration isolators.
isolators.
B) Low Cost Installation.
B) Low Cost Installation.
Units are factory assembled and pre-charged, with a single
Units are factory assembled and pre-charged, with a single point electrical connection. On arrival
point electrical connection. On arrival
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
lifted to their operating position through the lifting supports available on the units.
e on the units.
C) Capacities to Fit.
C) Capacities to Fit.
There is a large production line of packaged
There is a large production line of packaged units, with capacities ranging from 9.9 to 188.5kW for 50
units, with capacities ranging from 9.9 to 188.5kW for 50
Hz refrigeration tons at nominal conditions.
Hz refrigeration tons at nominal conditions.
D) Casing.
D) Casing.
Heavy grade steel casing with polyester epoxy powder electrostatic oven-baked paint of coating finish, designed
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
aluminum frame filter that slides out or easy cleaning or replacement.
easy cleaning or replacement.
E) Compressor.
E) Compressor.
The compressor used is hermetic refrigerant gas cooled, with internal thermal protection in each phase,
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
The evaporator and condenser coils are designed to deliver their respective duties at
deliver their respective duties at
optimum performance at all design conditions. Coils are
optimum performance at all design conditions. Coils are manufactured from seamless copper tubes
manufactured from seamless copper tubes mechanically expanded
mechanically expanded
into alum
into aluminum f
inum fins.
ins. All
All coils ar
coils are tested
e tested at 30kg/cm
at 30kg/cm
2
2
(450 Psi)
(450 Psi) air pressure,
air pressure, under water
under water to avoid
to avoid leakage. They
leakage. They also
also
undergo dry chemical cleaning after manufacturing for optimum system
undergo dry chemical cleaning after manufacturing for optimum system cleanness.
cleanness.
G) Direct Driven Condenser Axial
G) Direct Driven Condenser Axial Fans.
Fans.
All condenser fans are of the
All condenser fans are of the axial type, which are directly mounted on the motor
axial type, which are directly mounted on the motor
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
operation with high efficiency. All condenser fans are equipped with wire guards.
. All condenser fans are equipped with wire guards.
H) Condenser Fan Motor.
H) Condenser Fan Motor.
All fans
All fans motors are
motors are of totally
of totally enclosed air-cooled,
enclosed air-cooled, internal thermal
internal thermal current overload
current overload protected,
protected,
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
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.
J) Evaporator Fan Motors.
Motors are of the
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
on a floating
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
class “B” insulation. Fan motors with V-belt-driven type are of 1 speed type.
type.
K) Filters
K) Filters
