Werbung
Verfügbare Sprachen
Verfügbare Sprachen
If the unit is installed in places that are easily accessible to
is installed in places that are easily accessible to
people and animals, it is advisable to install protection grids
people and animals, it is advisable to install protection grids
around the unit.
To ensure best performance on the installation site, the
To ensure best performance on the installation site, the
following precautions and instructions must be followed:
instructions must be followed:
−
Make sure to provide a strong and solid foundation to
Make sure to provide a strong and solid foundation to
reduce noise and vibrations.
−
The water in the system must be particularly clean and all
The water in the system must be particularly clean and all
traces of oil and rust must be removed. A mechanical
traces of oil and rust must be removed. A mechanical
water filter must be installed on the unit's inlet piping.
Sound protection
When sound levels require special control, great care must be
When sound levels require special control, great care must be
exercised to isolate the unit from its base by appropriately
exercised to isolate the unit from its base by appropriately
applying anti-vibration elements (supplied as an option).
vibration elements (supplied as an option).
Flexible joints must be installed on the water connections, as
installed on the water connections, as
well.
Water piping
Piping must be designed with the lowest number of elbows
Piping must be designed with the lowest number of elbows
and the lowest number of vertical changes of direction. In this
and the lowest number of vertical changes of direction. In this
way, installation costs are reduced considerably and system
way, installation costs are reduced considerably and system
performance is improved.
The water system must have:
1. Anti-vibration mountings in order to reduce transmission of
vibration mountings in order to reduce transmission of
vibrations to the structures.
2. Isolating valves to isolate the unit from the water system
Isolating valves to isolate the unit from the water system
during maintenance.
3. Flow switch.
4. Manual or automatic air venting device at the system's
Manual or automatic air venting device at the system's
highest point. drain device at the system's lowest point.
drain device at the system's lowest point.
5. A suitable device that can maintain the water system under
A suitable device that can maintain the water system under
pressure (expansion tank, etc.).
6. Water temperature and pressure indicators to assis
temperature and pressure indicators to assist the
operator during service and maintenance.
operator during service and maintenance.
7. In case of unit replacement, the entire water system
be emptied and cleaned before the new unit is installed.
emptied and cleaned before the new unit is installed.
Regular test and proper chemical treatment of water are
Regular test and proper chemical treatment of water are
recommended before starting up the new unit.
8. In the event that glycol is added to the water system as
In the event that glycol is added to the water system as
anti-freeze protection, pay attention to the fact that suction
freeze protection, pay attention to the fact that suction
pressure will be lower, the unit's performance will be lower
pressure will be lower, the unit's performance will be lower
and water pressure drops will be greater. All unit
and water pressure drops will be greater. All unit-protection
systems, such as anti-freeze and low-pressure protection
will need to be readjusted.
9. Before insulating water piping, check that there are no
Before insulating water piping, check that there are no
leaks.
10.
Check that the water pressure does not exceed the design
Check that the water pressure does not exceed the design
pressure of heat exchangers water side. It's recommende
ressure of heat exchangers water side. It's recommended
to install a safety valve on the water piping.
to install a safety valve on the water piping.
Water treatment
Before putting the unit into operation, clean the water circuit.
Before putting the unit into operation, clean the water circuit.
Dirt, scales, corrosion debrits and other material can
accumulate inside the heat exchanger and reduce its transfer.
accumulate inside the heat exchanger and reduce its
Pressure drop can increase as well, thus reducing water flow.
Pressure drop can increase as well, thus reducing water flow.
Proper water treatment therefore reduces the risk of corrosion,
Proper water treatment therefore reduces the risk of corrosion,
erosion, scaling, etc. The most appropriate water treatment
erosion, scaling, etc. The most appropriate water treatment
must be determined locally, according to the type of system
must be determined locally, according to the type of system
and water characteristics.
The manufacturer is not responsible for damage to or
The manufacturer is not responsible for damage to or
malfunctioning of equipment caused by failure to treat water or
malfunctioning of equipment caused by failure to treat water or
by improperly treated water.
Evaporator anti-freeze protection
1.
If the unit is not operating during the winter it is
If the unit is not operating during the winter it is
recommended to drain and wash the evaporator and the
recommended to drain and wash the evaporator and the
water pipes with glycole. Evaporator is supplied with
draining and air flow connections.
2.
It is recommended to add an appropriate amount of
It is recommended to add an appropriate amount of
glycole inside the water circuit. Freezing temperature for
water-glycole solution should be at least
glycole solution should be at least 6° C lower than
the expected minimum ambient temperature.
the expected minimum ambient temperature.
3.
Insulate the pipes in particular those related to the chilled
nsulate the pipes in particular those related to the chilled
water to avoid the moisture phenomena.
Damage caused by freezing is not covered by the warranty.
Damage caused by freezing is not covered by the warranty.
on the unit's inlet piping.
, the entire water system must
w unit.
pressure protection
other material can
orator is supplied with
Freezing temperature for
.
Installing the flow switch
To ensure sufficient water flow through the evaporator, it is
To ensure sufficient water flow through the evaporator, it is
essential that a flow switch be installed on the water circuit.
essential that a flow switch be installed on the water circuit.
The flow switch can be installed either on the inlet or outlet
The flow switch can be installed either on the inlet or outlet
water piping. The purpose of the flow switch is to stop the unit
water piping. The purpose of the flow sw
in the event of interrupted water flow, thus protecting the
in the event of interrupted water flow, thus protecting the
evaporator from freezing.
The manufacturer offers, as optional, a flow switch that has
The manufacturer offers, as optional, a flow switch that has
been selected for this purpose.
This paddle-type flow switch is suitable for heavy
type flow switch is suitable for heavy-duty outdoor
applications (IP67) and pipe diameters in the range of 1" to 8".
applications (IP67) and pipe diameters in the range of 1" to
The flow switch is provided with a clean contact which must be
The flow switch is provided with a clean contact which must be
electrically connected to terminals shown in the wiring
electrically connected to terminals shown in the wiring
diagram.
Flow switch has to be tuned
evaporator water flow is lower than 50% of nominal flow rate.
evaporator water flow is lower than 50% of nomi
Electrical Installation
General specifications
All electrical connections to the unit must be carried out
All electrical connections to the unit must be carried out
in compliance with laws and regulations in force.
in compliance with laws and regulations in force.
All installation, management
All installation, management and maintenance activities
must be carried out by qualified personnel.
must be carried out by qualified personnel.
Refer to the specific wiring diagram for the unit you have
bought. Should the wiring diagram not be on the unit or
. Should the wiring diagram not be on the unit or
should
should
it
it
have
have
been
been
manufacturer representative, who will send you a copy.
In case of discrepancy between wiring diagram and
electrical panel/cables please contact the manufacturer
electrical panel/cables please contact the manufacturer
representative.
Only use copper conductors. Failure to use copper conductors
Only use copper conductors. Failure to use copper conductors
could result in overheating or corrosion
could result in overheating or corrosion at connection points
and could damage the unit.
To avoid interference, all control wires must be connected
To avoid interference, all control wires must be connected
separately from the power cables. Use different electrical
separately from the power cables. Use different electrical
passage ducts for this purpose.
Before servicing the unit in any way, open the general
Before servicing the unit in any way, open the general
disconnecting switch on the unit's main power supply.
sconnecting switch on the unit's main power supply.
When the unit is off but the disconnecting switch is in the
When the unit is off but the disconnecting switch is in the
closed position, unused circuits are live, as well.
closed position, unused circuits are live, as well.
Never open the terminal board box of the compressors before
Never open the terminal board box of the compressors before
having opened the unit's general disconnecting switch.
having opened the unit's general
Contemporaneity of single-phase and three
unbalance between phases could cause leakages towards
unbalance between phases could cause leakages towards
ground, during the normal operation of the units of the series.
ground, during the normal operation of the units of the series.
If the unit includes devices that cause superior harmonics (like
If the unit includes devices that cause superior harmon
VFD and phase cut), the leakage towards ground could
VFD and phase cut), the leakage towards ground could
increases to very higher values (about 2 Amp
ry higher values (about 2 Amp).
The protections for the power supply system have to be
The protections for the power supply system have to be
designed according to the above mentioned values.
designed according to the above mentioned values.
Operation
Operator's responsibilities
It is essential that the operator is appropriately trained and
is essential that the operator is appropriately trained and
becomes familiar with the system before operating the unit. In
becomes familiar with the system before operating the unit. In
addition to reading this manual, the operator must study the
addition to reading this manual, the operator must study the
microprocessor operating manual and the wiring diagram in
microprocessor operating manual and the wiring diagram in
order to understand start-up sequence, operation, shutdown
sequence and operation of all the safety devices.
sequence and operation of all the safety devices.
During the unit's initial start-up phase, a technician authorized
by the manufacturer is available to answer any questions and
by the manufacturer is available to answer any questions and
to give instructions as to the correct operating procedures.
The operator must keep a record of operating data for every
The operator must keep a record of operating data for every
installed unit. Another record should also be kept of all the
installed unit. Another record should also be kept of all the
periodical maintenance and servicing activities.
periodical maintenance and servicing activities.
If the operator notes abnormal or unusual operating conditions,
If the operator notes abnormal or unusual operating condit
he is advised to consult the technical service authorized by the
he is advised to consult the technical service authorized by the
manufacturer.
Open the isolation valves and / or interception
valves and / or interception
Before compressor start up, be sure that all isolating valves
Before compressor start up, be sure that all isolating valves
are fully open and back seated and the valve spindle tightl
are fully open and back seated and the valve spindle tightly
capped.
D - EIMWC01104
EIMWC01104-12EU - 11/148
d to stop the unit when the
wiring diagram for the unit you have
lost,
lost,
please
please
contact
contact
tive, who will send you a copy.
between wiring diagram and
phase and three-phase loads and
up sequence, operation, shutdown
up phase, a technician authorized
rect operating procedures.
your
your
Werbung
