Small air oil coolers are equipped with a single phase or
three phase outer-rotor motor.
Larger air oil coolers are equipped with a standard three
phase asynchronous inner rotor motor according to
IEC 60072 and IEC 60034.
Normal ambient temperature for the electric motor:
-20 °C - +40 °C. Connect the electrical motor to the electri-
city supply system according to Electrical connection.
See
the rating plate for further information.
The electric motor on large air oil coolers is equipped with
a motor bracket.
The air oil cooler can be provided with a thermo contact.
The fan will then start automatically when the preset tem-
perature has been reached.
The acoustic pressure level could reach 50-92 LpA dB(A)
at 1 m distance normal operating conditions. Inappropriate
locatation, or operation under extreme conditions, could
generate increase in acoustic pressure level and reduced
cooling capacity.
For general operating data, see Technical data.
Identification plate
The identification plate is fitted on the fan housing.
See Figure 2.
The identification plate contains the following information:
A
- Part number
B
- Designation
C
- Serial number
D
- Date of delivery (year and week, e.g. 1018, i.e. year
2010 and week 18).
Replace a damaged or missing type plate as soon as possible.
Installation
Lifting
Caution
Risk of bodily injury. To prevent physical harm
when lifting the unit, ensure correct lifting technique.
Make sure that all lifting devices are free from damage and
approved for the weight of the air oil cooler.
Air oil coolers as from size 033 are prepared for installation
of lifting eyes. Lifting eyes are available from Olaer on
request.
Mounting
Precaution
Risk of bodily harm. Make sure that the
air oil cooler is securely fixed.
The air oil cooler can be mounted in any position. However,
an upright installation standing on its feet is recommended.
A free space corresponding to a minimum of half the
height of the matrix (A) should be available in front of and
behind the air oil cooler to allow for good air flow, i.e. opti-
mal cooling capacity as well as low acoustic pressure level.
See Figure 3.
Inappropriate location of the air oil cooler or operation
under extreme conditions could generate increased acoustic
pressure level and reduce cooling capacity.
Connection of cooler matrix
Connect the cooler matrix using flexible hydraulic hoses
both to and from the cooler. Make sure that all connections
and hoses are sized according to the system pressure, flow,
temperature and fluid.
Connect the cooler matrix as illustrated below.
See Figure 4 or Figure 5.
A
- Inlet.
B
- Outlet for single-pass.
C
- Outlet for two-pass.
D
- Thermo contact connection.
Dimensions on connections are cooler matrix size dependent.
Connection chart,
see Figure 6.
Important
The cooler matrix is designed for maximum dyna-
mic working pressure 14 bar. When the cooler is installed in a
return line, there should be no pressure spikes. If this is not
possible, an offline cooling system should be used.
Electrical connection
Danger
Risk of electrical shock. All electrical connec-
tions must be made by a qualified electrician!
Prior to connecting the motor to the electricity supply
system, make sure the information on the motor label corre-
sponds to the line voltage and frequency. The motor should
be installed according to general and electrical safety
rules and should be made by a qualified electrician.
Precaution
Be careful when connecting. Improperly
made connections, damaged cables, etc. could cause
components to become live or result in the incorrect direc-
tion of rotation of the electric motor.
• Connection of a single phase outer rotor motor:
Connect the live to L
(blue)
, neutral to N
(black)
and ground to PE
(yellow/green)
.
See Figure 7.
• Connection of three phase outer rotor motor.
See Figure 8 or Figure 9.
• Connection of three phase inner rotor motor.
See Figure 10.
Example for motor: 220-240 V D/380-420 V Y.
The direction of rotation of three phase motors is altered
by changing connection of two phases.
If the cooler is fitted with a thermo contact, use a relay if
the current load exceeds the maximum load for the thermo
contact.
Note!
A motor overload protection is recommended.
The size of the overload protection/fuse, depends on fan
size and air flow across the cooler. Contact Olaer concerning
motor protection/fuse size.
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OLAER LAC AIR OIL COOLER |
Installation and servicing manual | English
