The Professional Choice
LDC
With DC motor
OLAER LDC | optimized for mobile use
The LDC air oil cooler with 12 or 24 V DC motor is
optimized for use in the mobile industry. Together with
a wide range of accessories, the LDC cooler is suitable
for installation in most applications and environments.
The maximum cooling capacity is 30 kW at
ETD 40°C. Choosing the right cooler requires
precise system sizing. The most reliable way to
size is with the aid of our calculation program. This
program, together with precise evaluations from our
experienced, skilled engineers, gives you the
opportunity for more cooling per € invested.
Overheating - an expensive problem
An under-sized cooling capacity produces a temperature
balance that is too high. The consequences are poor
lubricating properties, internal leakage, a higher risk
of cavitation, damaged components, etc. Overheating
leads to a significant drop in cost-efficiency and
environmental consideration.
Temperature optimisation - a basic prerequisite
for cost-efficient operation
Temperature balance in a hydraulic system occurs when
the cooler can cool down the energy input that the
system does not consume - the system’s lost energy
(Ploss = Pcool = Pin – Pused).
Temperature optimisation means that temperature
balance occurs at the system’s ideal working temp-
erature – the temperature at which the oil’s viscosity
and the air content comply with recommended values.
The correct working temperature produces a number of
economic and environmental benefits:
• The hydraulic system’s useful life is extended.
• The oil’s useful life is extended.
• The hydraulic system’s availability increases –
more operating time and fewer shutdowns.
• Service and repair costs are reduced.
• High efficiency level maintained in continuous
operation – the system’s efficiency falls if the
temperature exceeds the ideal working
temperature.
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OLAER | LDC
Olaer is a global player specialising in innovative, efficient system solutions for temperature optimisation and energy storage.
All over the world, our products are working in the most diverse environments and applications.
LDC Air Oil Coolers
For mobile use - maximum cooling capacity 30 kW
Lifetime
Cooling capacity
The Professional Choice 3
OLAER | LDC
Clever design and the right choice of
materials and components produce a long
useful life, high availability and low service
and maintenance costs.
Compact design
and low pressure
drop and high
cooling capacity.
Smart DC Drive for soft start of fan, as well as lower power consumption and sound level by means of temperature-
controlled speed regulation. Smart DC Drive also eliminates voltage peaks, thus contributing towards a longer useful
life for the fan motor.
Smart DC Drive
Easy to maintain
and easy to retrofit in
many applications.
Quiet
fan and fan motor.
Compact design
and
low weight.
DC motor
12V/24V
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OLAER | LDC
Calculate the cooling capacity requirement
Enter your values ....
... suggested solution
Cooling
capacity
requirement?
Installed
capacity
Flow?
Pressure?
Pump capacity?
Measure in
your existing
unit
Contact
our
engineers
Theoretical
capacity losses
Choose the right kind of cooler
Optimal sizing produces efficient cooling. Correct sizing
requires knowledge and experience. Our calculation
program, combined with our engineers’ support, gives
you access to this very knowledge and experience. The
result is more cooling per € invested.
The user-friendly calculation program can be
downloaded from – www.olaer.se.
Valuable system review into the bargain
A more wide-ranging review of the hydraulic system is
often a natural element of cooling calculations. Other
potential system improvements can then be discussed
– e.g. filtering, offline or online cooling, etc. Contact us
for further guidance and information.
OLAER’s quality and performance guarantee
insurance for your operations and systems
A constant striving towards
more cost-efficient and environ-
ment friendly hydraulic systems
requires continuous develop-
ment. Areas where we are
continuously seeking to
improve performance include
cooling capacity, noise level,
pressure drop and fatigue.
Meticulous quality and performance tests are conducted
in our laboratory. All tests and measurements take
place in accordance with standardised methods -
cooling capacity in accordance with EN1048,
noise level ISO 3743, pressure drop EN 1048 and fatigue
ISO 10771-1.
For more information about our standardised tests, ask
for “OLAER’s blue book – a manual for more reliable
cooler purchasing”.
The Professional Choice 5
OLAER | LDC
Better energy consumption means not only less environmental impact, but also reduces operating costs, i.e. more cooling per € invested.
More cooling per €
with precise calculations and our engineers’ support
OLAER | LDC
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OUTLET
(with bypass type S)
The cooling capacity curves are based on the inlet oil
temperature and the ambient air temperature.
An oil temperature of 60°C and an air temperature of
20 °C produce a temperature difference of 40 °C.
Multiply by kW/°C for total cooling capacity.
TYPE A B C D E F G H I J K L
M
ø N O P
Weight
kg (approx)
Acoustic
Pressure
LpA dB(A)1m*
LDC 002 184 74 72 189 94 G½ 187 72 100 107 157 36 9 - 11 25 4 66
LDC 003 244 134 82 227 71 G1 146 90 118 102 147 26 9x14 - 23 35 5 68
LDC 004 267 134 82 253 72 G1 146 90 131 107 152 26 9x14 - 23 35 6 68
LDC 007 330 203 82 338 59 G1 267 160 173 105 170 57 9 - 23 44 9 71
LDC 011 400 360 82 396 65 G1 101 230 200 125 218 - 9x29 - 23 44 12 74
LDC 016 464 416 82 466 63 G1 101 300 235 125 128 - 9x29 - 23 44 15 74
LDC 020 510 470 82 510 61 G1 101 280 257 125 211 - 9x29 - 23 44 18 77
LDC 023 615 356 46 635 26 G1 290 305 200 125 218 50 13 455 - 8 25 77
LDC 033 635 356 82 678 59 G1¼ 290 406 220 165 258 50 13 478 25 49 30 77
* = Noise level tolerance ± 3 dB(A)
0,40
0,50
0,60
0,70
0,80
Cooling capacity
kW/°C
0
0,10
0,20
0,30
50 100 150 200 250 300 Oil flow
l /min
023
007
003
Cooling capacity
LDC 002 – LDC 033
50 100 150 200 250
Oil flow
l /min
Pressure
drop
bar
3,0
2,6
2,2
1,8
1,4
1,0
0,6
0,2
Pressure drop
At 30 cSt single-pass
003, 004
016, 020, 023
0,40
0,50
0,60
0,70
0,80
Cooling capacity
kW/°C
0
0,10
0,20
0,30
50 100 150 200 250 300 Oil flow
l /min
023
007
003
Cooling capacity
LDC 002 – LDC 033
50 100 150 200 250
Oil flow
l /min
Pressure
drop
bar
3,0
2,6
2,2
1,8
1,4
1,0
0,6
0,2
Pressure drop
At 30 cSt single-pass
003, 004
016, 020, 023
The Professional Choice 7
OLAER | LDC
Cooling capacity tolerance ± 10% kW.
OLAER | LDC
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EXAMPLE:
LDC - 016 - A - S - 00 - S20 - S - 0
1 2 3 4 5 6 7 8
1. AIR OIL COOLER
WITH DC MOTOR = LDC
2. COOLER SIZE
002, 003, 004, 007, 011, 016, 020, 023, 033
3. MOTOR VOLTAGE
12 V = A
24 V = B
4. ACCESSORIES FOR DC MOTOR
No motor accessories = 0
Smart DC Drive, incl. temperature indicator 50°C = S
Relay box = C
5. THERMO CONTACT
No thermo contact = 00
40 °C = 40
50 °C = 50
60 °C = 60
70 °C = 70
80 °C = 80
90 °C = 90
6. COOLER MATRIX
Standard = 000
Two-pass = T00
Built-in, pressure-controlled bypass, single-pass
2 bar = S20
5 bar = S50
8 bar = S80
Built-in, pressure-controlled bypass, two-pass*
2 bar = T20
5 bar = T50
8 bar = T80
Built-in temperature and pressure-controlled bypass, single-pass
50 °C, 2.2 bar = S25
60 °C, 2.2 bar = S26
70 °C, 2.2 bar = S27
90 °C, 2.2 bar = S29
Built-in temperature and pressure-controlled bypass, two-pass*
50 °C, 2.2 bar = T25
60 °C, 2.2 bar = T26
70 °C, 2.2 bar = T27
90 °C, 2.2 bar = T29
* = not for LDC 002 - LDC 004
7. MATRIX GUARD
No guard = 0
Stone guard = S
Dust guard = D
Dust and stone guard = P
8. STANDARD/SPECIAL
Standard = O
Special = Z
Technical specification
FLUID COMBINATIONS
Mineral oil HL/HLP in accordance with DIN 51524
Oil/water emulsion HFA, HFB in accordance with CETOP RP 77H
Water glycol HFC in accordance with CETOP RP 77H
Phosphate ester HFD-R in accordance with CETOP RP 77H
MATERIAL
Cooler matrix Aluminum
Fan blades/guard Glass fibre reinforced polypropylene
Fan housing Steel
Other parts Steel
Surface treatment Electrostatically powder-coated
COOLER MATRIX
Maximum static working pressure 21 bar
Dynamic working pressure 14 bar*
Heat transfer tolerance ± 6 %
Maximum oil inlet temperature 120 °C
* Tested in accordance with ISO/DIS 10771-1
ELECTRIC MOTOR
LDC
002 003 004 007-020 023-033
Speed (rpm) 3 700 3 670 3 350 3 060 3 060
Protection std. IP 68 IP 68 IP 68 IP 68 IP 68
Insulation class H H H H H
Ambient temp. -30°C - +80°C
Power consump. (A) 12V 6.5 8 8 20 2x20*
(A) 24V 3.5 4 4 10 2x10*
* = LDC 023 and LDC 033 have two motors
Use a relay if the current load is superior to: 8 A at 12V and 6 A 24V
COOLING CAPACITY CURVES
The cooling capacity curves in this technical data sheet are based on tests in accor-
dance with EN 1048 and have been produced using oil type ISO VG 46 at 60 °C.
CONTACT OLAER FOR ADVICE ON
Oil temperatures > 120 °C
Oil viscosity > 100 cSt
Aggressive environments
Ambient air rich in particles
High-altitude locations
CONNECTION CHART
Connection chart for LDC air oil cooler.
The information in this brochure is subject to change without prior notice.
Key for LDC air
oil coolers
All positions must be filled in when ordering
The Professional Choice 9
OLAER | LDC
With our specialist expertise, industry knowledge and advanced technology,
we can offer a range of different solutions for coolers and accessories to meet your requirements.
Supplementing a hydraulic system with a cooler, cooler accessories and an accumulator gives you increased availability
and a longer useful life, as well as lower service and repair costs. All applications and operating environments are unique.
A well-planned choice of the following accessories can thus further improve your hydraulic system. Please contact
Olaer for guidance and information.
Take the next step
- choose the right accessories
Pressure-controlled
bypass valve Integrated
Allows the oil to bypass the cooler matrix if the
pressure drop is too high. Reduces the risk of
the cooler bursting, e.g. in connection with
cold starts and temporary peaks in pressure
or flow. Available for single-pass or two-pass
matrix design.
Temperature-controlled
bypass valve Integrated
Same function as the pressure-controlled
by–pass valve, but with a temperature-controlled
opening pressure - the hotter the oil, the
higher the opening pressure. Available for
single-pass or two-pass matrix design.
Thermo contact
Sensor with preset fix point. For temp-
erature warnings, and for more cost-efficient
operation and better environmental
consideration through the automatic switching
on and off of the fan motor.
Smart DC Drive speed
regulation
For cost-efficient operation and better
environmental consideration through speed-
regulated fan control – the higher the
temperature, the higher the fan speed.
Temperature-controlled
3-way valve External
Same function as the temperature-controlled
bypass valve, but positioned externally.
Note: must be ordered separately.
Stone guard/Dust guard
Protects components and systems from
tough conditions.
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OLAER | LDC
A close collaboration between our application
engineers, designers and you as customer during the
whole project will result in a high-quality product. The
final product will be a tailor-made cooler, which always
meet your unique needs.
Extensive choices
Long-term experience from the mobile field has
provided us with a unique ability to deliver the ideal
combination cooler solution. Depending on the
conditions, the cooler fan can be operated by the
diesel engine on the machine or by a hydraulic motor
or a DC motor. We can also supply many different cooler
combination options. A frequent combination is the
“side-by-side”-cooler, where the coolers are placed
side-by-side, no matter the media, such as a water
cooler, an oil cooler and an intercooler. Another
solution is the “sandwich”-cooler, where the coolers
are placed in front of each other. The solution could
also be a combination of these two. No matter which
combination will be used, the pressure drop and
the heat dissipation across the matrix will always
be optimal.
Professional competence as well as advanced technology and extensive knowledge from the industry,
allow us to provide many cooler combinations, which meet your unique needs.
Combinations
providing optimal solutions
OLAER | LDC
The Professional Choice 11
The Professional Choice
www.olaer.com
- in Fluid Energy Management
Global perspective
and local entrepreneurial flair
Olaer is a global player specialising in innovative,
efficient system solutions for temperature optimisation
and energy storage. Olaer develops, manufactures and
markets products and systems for a number of different
sectors, e.g. the aircraft, engineering, steel and
mining industries, as well as for sectors such as oil and
gas, contracting and transport, farming and forestry,
renewable energy, etc.
All over the world, our products operate in the most
diverse environments and applications. One constantly
repeated demand in the market is for optimal energy
storage and temperature optimisation. We work at a
local level with a whole world as our workplace – local
entrepreneurial flair and a global perspective go hand
in hand.
Our local presence, long experience and a wealth of
knowledge combine with our cutting-edge expertise
to give you the best possible conditions for making a
professional choice.
Copyright © 2010 OLAER - The information in this brochure is subject to change without prior notice.
