Daikin Clima-Flex IOM CLIM Series User manual

Installation, Operation and
Maintenance Manual
IOM
Group: Chiller
Part number: IOM CLIM
Date: 23 November 2022
CLIM Series
Air-Cooled Fixed Compressor Chiller
Water Generator Unit
Model
7.5 to 62.5 TR
Refrigerant HFC-410A
50/60 Hz

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©2022 Clima Flex . Illustration and data cover the Clima Flex product at the time of publication and we reserve the right to make changes
in design and construction at any time without notice.
Manufactured in an ISO 9001 certified facility
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Must be completed, signed and submitted to Clima Flex at least 2 weeks prior to the requested start date.
Job name
Place of installation
Customer order number
Model number(s)
G.O. Number(s)
Chilled water and condensing water for water-cooled chillers Yes No N/A Initials
Complete piping
Water strainer(s) installed in piping according to manual requirements
Water system: flushing, filling and draining; water treatment in place
Pumps installed and operational (rotation check, filter cleaning)
Controls in operation (3-way valves, front/bypass gates, by-pass valves, etc.)
Water system operated and tested; flow rate meets unit design requirements (Not all units include this)
Flow switch(es)-installed, wired and calibrated
Ventilation installed on evaporator
Electrical Yes No N/A Initials
Building controls in operation
* Power cables connected to power block or optional disconnect switch
Power cables have been checked for proper phasing and voltage
All interlock scripts are complete and meet unit specifications
Power is applied at least 12 hours prior to start-up
Oil heaters energized at least 12 hours prior to startup
Cooler components (EXV sensor transducers) installed and wired properly
*Wiring complies with National Electrical Code and local codes (See NOTES)
Various Yes No N/A Initials
Unit control disconnects everything
Factory check of remote evaporator/condenser lines
Leak, evacuation and charge check of all refrigeration piping/components
Thermometers, wells, gauges, control, etc., installed
Minimum system load of 80% of available capacity to test/adjust controls
Attachment: Technical breakdown of selection software
Attachment: Acknowledgement of Receipt of Final Order
Attachment: Remote Piping Approval
NOTES: The most common problems that delay start-up and affect unit reliability are:
1. Compressor motor power cables installed in the field are too small. Questions: Contact your local Clima Flex sales representative *. Indicate the size, number
and type of conductors and conduits installed:
a. From the power supply to the chiller __________________________________________________________________
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
Contractors’ representative
Signature
Name
Company
Date
Phone / Mail
Clima Flex Sales Representative
Signature
Name
Company
Date
Phone / Mail

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
This manual contains safety instructions that must be followed during installation and maintenance of the unit. Read this manual before
installing or operating this unit.
NOTES: Installation and maintenance should be performed only by qualified personnel who are familiar with local codes and regulations
and who have experience with this type of equipment.
! DANGER !
LOCK OUT/LABEL all power sources before starting, pressurizing, depressurizing or shutting down the chiller.
Disconnect electrical power before servicing equipment. More than one disconnection may be required to deenergize the unit.
Failure to follow this warning to the letter can result in serious injury or death. Be sure to read and understand the installation,
operating and service instructions in this manual.
!DANGER !
Danger indicates a dangerous situation which, if not avoided, will result in death or serious injury.
!WARNING !
Warning indicates a potentially dangerous situation which may result in property damage, personal injury or death if not avoided
! CAUTION !
Caution indicates a potentially dangerous situation which may result in minor injury or equipment damage if not avoided.
! WARNING !
Electric shock danger. Improper handling of this equipment can cause personal injury or equipment damage. This equipment must
be properly grounded. Control panel connections and maintenance should be performed only by personnel knowledgeable in the
operation of the equipment being controlled. Disconnect electrical power before servicing equipment.
!WARNING !
If refrigerant leaks from the unit, there is a potential choking danger as the refrigerant will displace air in the immediate area. Be
sure to follow all applicable published industry-related standards and local, state, and federal statutes, regulations, and codes if
refrigerant is produced. Avoid exposing refrigerant to an open flame or other ignition source.
! WARNING !
Polyolester oil, commonly referred to as POE oil, is a synthetic oil used in many refrigeration systems and may be present in this
Clima Flex product. POE oil, if it ever comes in contact with PCV/CPVC, will coat the inside wall of the PVC/CPVC pipe and cause
environmental stress fractures. Although there is no PCV/CPCV pipe in this product, keep this in mind when selecting piping materials
for your application, as system failure and property damage could occur. Consult the pipe manufacturer’s recommendations to
determine appropriate pipe applications.
!CAUTION !
Static sensitive components. Static discharge during handling of the electronic circuit board can cause damage to components.
Use a static strap before performing any service work. Never unplug any cables, circuit board terminal blocks, or power plugs while
power is applied to the panel.
!CAUTION !
When moving refrigerant to/from the cooler using an auxiliary tank, a grounding strap should be used. An electrical charge builds
up when halo-carbon refrigerant travels in a rubber hose. A grounding strap should be used between the auxiliary refrigerant tank
and the cooler end sheet (ground to ground), which will safely carry the charge to ground. Failure to follow this procedure may result
in damage to sensitive electronic components.
DANGER IDENTIFICATION INFORMATION
Notes: Indicate important details or clarifying statements for the information presented.

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
Clima Flex’s CLIM series air-cooled chilled water generators are
complete, self-contained, automatic chillers designed for outdoor
installation. The package units are fully assembled, factory wired,
charged and tested.
The electrical control center includes all operating controls and
equipment protection necessary for reliable automatic operation.
Components housed in a weatherproof control panel.
NOMENCLATURE
FAMILY
CAPACITY (BTU)
090 - 90,000
120 - 120,000
150 - 150,000
AIR DISCHARGE
VS - Vertical Small
OPERATION
C - Cooling Only
H - Heat Pump
UNITS
1 - Stand alone
2 - 2 units
3 - 3 units
4 - 4 units
5 - 5 units
CONDENSER FAN
A - Axial Fixed
ANTICORROSION
C - Coat in Condenser
I - Coat in Components
M - Total - Coating
N - None
VOLTAGE
C - 208-230 / 3 / 60
D - 460 / 3 / 60
COMPRESSOR
F - Fixed
V - Inverter
S - Two Stages
CONDENSER
M - Microchannel
SINGLE SKID
O - With base
N - N/A
HEAT RECOVERY
N - N/A
FREE COOLING
N - No
GRILLS
1 - Painted Grill
PIPE
2 - 2½” NPT
ELECTRICAL
CONNECTION
M - Multipoint
S - Single Point
HIDRAULIC
CONNECTION
N - Not included
Y - Yes included
PACKAGING
D - Domestic
I - Internacional
CLIM-90-VS-C-1-A-N-D-F-M-M-N-N-1-2-S-N-D-N-4-C-0
REFRIGERANT
4 - R410-A
CONTROL
P - Parametric
(Only standalone)
C - pCO / pGD
EXTRA
0 - TBD
PROTOCOL
M - Modbus
B - BACnet IP

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Take care to avoid rough handling of the unit. Do not push or pull
the unit from other than the base while seated on properly sized
dollies.
To lift the unit, 2-1/2 (64 mm) diameter lifting eyes are provided
at the base of the unit. Arrange the spreader bars and cables to
prevent damage to the condenser coils or cabinet (see Figure 1).


HANDLIING

The units must be installed in accordance with all national and
local safety standards. If there are no applicable local standards,
the installation must be carried out in accordance with national
standards.
Check all items carefully against the bill of lading.
Inspect all units for damage upon arrival. Report shipping damage
and file a claim with the carrier.
Check the nameplate on the unit before unloading, making sure it
matches the available power supply.
Clima Flex is not responsible for physical damage that occurs
after the unit leaves the factory.
! DANGER !
Improper rigging, lifting or moving of a unit can result
in property damage, serious personal injury or death.
Follow the rigging and moving instructions carefully. Do
not stand under the unit while it is being lifted or installed.

The unit nameplate is located on the outside of the unit power
panel. Both the model number and serial number are located on
the unit nameplates; the serial number is unique to the unit.
These numbers should be used to identify the unit in case of
service, parts or warranty questions. This nameplate also contains
the unit’s refrigerant charge and electrical ratings. The evaporator
nameplate is under the insulation and contains the serial number.
The compressor nameplate is located on each compressor and
provides pertinent electrical information.
! WARNING !
Installation should be performed by qualified personnel who
are familiar with local codes and regulations.
! CAUTION !
All lifting locations must be used to avoid damage to the unit.
Figure 1. Required elevation arrangement.
Table 1. Operating and Standby Limits
Maximum standby ambient temperature 130°F (54°C)
Maximum operating ambient temperature 105°F (41°C)
Minimum operating ambient temperature (standard control) 32°F(0°)
Cold water outlet temperature 40°F A 65°F (4°C to 18°C)
Outgoingchilledfluidtemperatures(withantifreeze)-Notethatincasesofhighambienttemperature,
the lowest outgoing water temperature settings may be outside the chiller operating envelope. 15°F A 65°F (-9°C to 18°C)
Maximum evaporator inlet fluid temperature 81°F (27°C)
Maximum temperature of inlet fluid to non-operating evaporator 100°F (38°C)

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MODELS DIMENSIONS
A D
in cm in cm in cm
CLIM 7.5 TR w1 30½” 77.74 39½ 100 31¾90.65
CLIM 10 TR w2 38 96.52 39½ 100 31¾90.65
CLIM 12.5 TR w3 46¾ 118.70 39½ 100 31¾90.65
Figure 2. Recommended spaces for the unit.
The units should be installed on a solid and well-balanced base.
In case it is placed on the floor, a solid concrete base should be
fabricated, which slightly exceeds the area of the unit.
This base must be able to support the weight of the unit. Anti-
vibration supports must be installed between the frame of the unit
and the concrete base of the steel beams; for such installation,
use the dimensioning diagram attached in the installation manual
included with your equipment.
The unit frame must be perfectly level during installation, if
necessary insert shims under the anti-vibration mounts.
If the unit will be installed in places of easy access for people
and/or animals, it is recommended to place a protection grid to
prevent access.
To ensure optimum performance of the unit once in place, some
instructions and precautions should be followed such as:
• Ensure a strong and solid base to reduce noise and vibration.
• Avoid installing the unit in areas that may be hazardous
during equipment maintenance, such as platforms without
guardrails, guide rails, or areas that do not meet the space
requirements around the unit.
MOUNTING
The inside of the base rail is open to allow access for securing
mounting bolts, etc.
All compressor bolts, rubber, grommets and fasteners should be
left in place in the base. None of these fasteners are considered
“temporary shipping bolts”.
CLEANING SERVICE
A.The control panels are located at the end of the chiller and
require a minimum clearance of 1.2 meters in front of the
panels. The compressor, filter-driers and line shutoff valves
are accessible on each side or end of the unit. Do not block
access to the sides or ends of the unit with piping or ductwork.
B.These areas must be open for service access. The minimum
service distance is as follows:
A.Sides
• 4 fan models: Minimum of 1.2 m (4 ft.)
• 6 to 14 fan models: It is strongly recommended that a minimum
of 8 ft (2.4 m) be left on one side to allow for coil replacement.
Coils may be removed from the top, leaving a minimum of 4
ft (1.2 m) side clearance; however, unit performance may be
diminished.
B.Control panel end
• All models: Minimum of 4 feet (1.2 meters).
C.Opposite end of control panel
• 4-fan models: Minimum 8 feet (2.4 m) to remove coil.
• 6- to 14-fan models: 8 ft (2.4 m) minimum. Clearance may
be reduced to 4 ft (1.2 m) if side clearance is sufficient for
evaporator service and removal.
Clima Flex units are designed for outdoor installation. It is
necessary for the units to have air ventilation, in addition to a free
air inlet (see figure 2) to allow proper air circulation, as well as to
provide access for servicing the equipment.
For optimal operation of the equipment, a correct connection to
the hydraulic network and the minimum water flow per minute
specified in the technical information sheet of the equipment is
required. As well as a correct connection to the electrical power
according to the electrical values of the technical information
sheet of the system.
• The installer is responsible for calculating the best position for
the unit. It is vitally important that the suggested clearances
are respected in order to provide adequate ventilation for the
condenser louvers.
• Avoid recirculation of hot air.
• Avoid lack of air supply to the air-cooled condenser. Failure
to comply with these conditions can result in increased
condenser pressure which in turn can lead to poor energy
efficiency and cooling capacity.
Figure 3. Cleaning service

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! CAUTION !
The performance of the unit may be affected if the operating
clearance is not sufficient.

AIR operating equipment is designed to be installed OUTDOOR.
It is necessary for the equipment to have adequate ventilation, as
well as a free air inlet to allow proper air circulation, and to provide
access and space for equipment maintenance.

For optimal operation of the equipment, a correct connection to
the hydraulic network and the minimum water flow per minute
specified in the technical information sheet of the equipment is
required. As well as a correct connection to the electrical power
according to the electrical values of the technical information
sheet of the system.
Case 1. Building or wall on one side of the unit
NOTES: Assumes a solid height wall higher than the unit. Refer
to case 4 for partial wall openings.
For Tandem 7.5 TR models, maintain a minimum of 4 feet from a
wall of any height.
For Tandem 10 TR models, maintain a minimum of 6 feet from a
wall of any height.
For Tandem 12.5 TR models, maintain a minimum of 8 feet from
a wall of any height.
Sufficient distance must be maintained between the unit and
adjacent walls or other units to allow the required airflow from the
unit to reach the coils. Failure to do so will reduce capacity and
increase energy consumption.
The clearance requirements shown are a general guide and
cannot take into account all scenarios. Factors such as prevailing
winds, additional equipment within the space, outside air
temperature and many other factors may require more clearance
than shown. Additional clearances may be required under certain
circumstances.
The graphs on the following pages indicate the minimum
clearance for different types of installations and also the reduction
in capacity and increase in power if a smaller space is used. The
graphs are based on individual cases and should not be combined
with other scenarios.
Figure 4. Building or wall on one side of the unit
Case 2. Two units side by side
For models 05-20 , there should be a minimum of 4 feet between
two units placed side by side; however, performance may be
affected at this distance. For models 30-62.5 , the minimum is
6 feet, since closing the gap may cause recirculation of air and
elevation of condenser pressure. Assuming the requirement
that one side have at least 8 feet of service clearance is met,
the figures in Case 2 show the performance adjustments as the
distance between two units increases.
Figure 5. Two units side by side
Case 3. Three or more units, side by side
For all models, there must be a minimum distance between units
placed side by side; however, performance may be affected at
this distance. The minimum distances are: models 5 to 10 TR - 4
feet, models 12.5 to 30 - 5 feet, models 40 to 62.5 - 6 feet.


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

Figure 6. Three or more units, side by side
Case 4. Open protection walls
Decorative walls are often used to help conceal a unit, either on
the ground or on the roof. Whenever possible, design these walls
so that the combination of their open area and distance to the unit
does not require a performance adjustment.
If the percentage of wall openness is less than recommended for
the distance to the unit, it should be considered a solid wall. The
wall height is assumed to be equal to or less than the height of the
unit when mounted on its base bracket.
If the wall height is greater than the unit height, refer to Case 5:
Pit Installation for performance adjustment factors. The distance
from the sides of the unit to the side walls must be sufficient for
service, such as opening the control panel doors.
In the case of uneven wall separation, the distance from the unit
to each wall can be averaged as long as no distance is less than
4 feet. Values are based on walls on all four sides.
Case 5. Pit installation
Pit installations can cause operating problems due to recirculation
and air restriction and require that sufficient air separation be
provided, safety requirements be met, and service access be
provided. A solid wall surrounding a unit is substantially a pit and
this datum should be used. Sometimes a steel grating is used to
cover a pit to prevent accidental falls or trips into the pit.
The grille material and installation design should be strong
enough to prevent such accidents, but should provide plenty of
open area to avoid recirculation problems.
Have the Clima Flex sales representative review the installation
of any pit prior to installation to ensure that it has sufficient airflow
characteristics and is approved by the facility design engineer to
avoid the risk of an accident.
Figure 7. Pit installation
! CAUTION !
To prevent damage to the evaporator and possible failure of
the chiller, a supply filter is required in the inlet water piping
that connects to this evaporator. This filter must be installed
prior to operation of the chilled liquid pumps.
Field-installed water piping for the chiller should include:
• A cleanable filter installed at the water inlet to the evaporator
to remove debris and impurities before they reach the
evaporator. Install the cleanable filter within 1,500 mm tubing
length from the evaporator inlet connection and downstream
of any solder connections (no solder connections between
the filter and evaporator). CLIM models 7.5 - 62.5 require
a filter with perforations no larger than 1.6 mm (0.063”) in
diameter. For more information, refer to the inlet strainer
guidelines on page 10-11.
• A water flow switch should be installed in the horizontal
piping of the supply water line (evaporator outlet) to prevent
evaporator freezing under low or no flow conditions. The flow
switch can be ordered as a factory installed option, as a field
installed kit, or can be supplied and installed in the field. See
page 12 for more information.
• Piping for units with brazed plate evaporators must have
a drain and vent connection at the bottom of the bottom
connection piping and at the top of the top connection piping,
respectively, see Figure 8.
• These evaporators do not have drain or vent connections due
to their construction. Purge air from the water system prior to
unit start-up to provide adequate flow through the evaporator.
• A suitable pipe support, separate from the unit, to eliminate
weight and stress on fittings and connections.
• An expansion tank and regulating valve to maintain water
pressure.
• Suitable mechanical connections. All evaporators have.
• OGS type grooved water connections (adhering to AWWA
C606) optionally with flanges. PVC piping should not be used.
! WARNING !
Polyolester oil, commonly known as POE oil, is a synthetic oil used in many refrigeration systems and is present in this Clima Flex
product. POE oil, if it ever comes in contact with PVC/CPVC, will coat the inside wall of the PVC/CPVC pipe causing environmental
stress fractures. Although there is no PVC/CPVC pipe in this product, keep this in mind when selecting piping materials for your
application as system failure and property damage could occur. Consult the pipe manufacturer’s recommendations to determine
suitable pipe applications.

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
Figure 8. Typical piping of a brazed plate evaporator, series CLIM Tandem
It is recommended that the field-installed water piping for the
chiller include:
• Temperature sensors at evaporator inlet and outlet
connections.
• Water pressure gauge connection taps and pressure gauges
on evaporator inlet and outlet connections to measure water
pressure drop.
• Shut-off valves to isolate the unit from piping during unit
maintenance.
• Minimum bends and elevation changes to minimize pressure
drop.
• Vibration eliminators on supply and return water lines to
reduce transmissions to the building.
• Thorough flushing of system water piping prior to making
connections to the unit evaporator.
• Insulation of the piping, including a vapor barrier, helps
prevent condensation and reduces heat loss.
• Periodic water analysis and chemical treatment of the
evaporator loop water is recommended immediately after unit
start-up.
NOTES: Failure to comply with these measures may result in
performance and reliability problems.
INLET STRAINER GUIDELINES
An inlet water filter kit must be installed in the cold water piping
upstream of the evaporator inlet. There are several ways available
to meet this requirement:
TECHNICAL DATA OF THE STRAINER
Brass
Filter element: Polyamide body coated with nylon mesh nylon
mesh
Filter vessel: Trogamid T 5000 (practically impact resistant,
pressure wave impact resistant, pressure wave resistant,
permanently transparent, stress resistant).
(Brass cup available on request).
Working pressure PN 16, test pressure 25 bar, maximum water
temperature 30° C. maximum water temperature 30° C, mesh


Table 2. Flow rates according to DVGW test
DN 20  5,0 m3/h
DN 35 Rp 1 7,9 m3/h
DN 32  12,0 m3/h
DN 40  11.9 m3/h
DN 50 Rp 2 14,9 m3/h

1. Factory installed option available - models 7.5 through 62.5
2. A field installation kit shipped loose with the unit is available
for all unit sizes and consists of:
3. Y-type area strainer with 304 stainless steel perforated bas-
ket, slotted pipe connections and strainer cover [a strainer
with perforations as indicated below depending on model].
4. A field supplied strainer meeting the specifications and insta-
llation requirements of this manual.

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WATER FLOW LIMITATIONS
Constant evaporator flow
Maximum flow rate and pressure drop are based on a 6°F
temperature drop. Flow rates above the maximum values will
result in unacceptable pressure drops and may cause excessive
erosion, which could lead to failure.
The minimum flow rate and pressure drop are based on a full
load evaporator temperature drop of 16°F. Evaporator flow rates
below the minimum values can result in laminar flow leading to
low pressure alarms, fouling and poor temperature control.

Reducing the evaporator flow rate in proportion to the load can
reduce the energy consumption of the system. The rate of flow
change should be a maximum of 10 percent of the flow per minute.
For example, if the maximum design flow rate is 200 gpm and is to
be reduced to a flow rate of 140 gpm, the flow change is 60 gpm.
Ten percent of 200 gpm equals a change of 20 gpm per minute,
or a minimum of three minutes to go from the maximum flow to
the desired flow.
If the flow rate falls below the minimum allowable, large reductions
in heat transfer can occur. If the flow rate exceeds the maximum,
excessive pressure drop and tube erosion can occur.
System water considerations
Reducing the evaporator flow rate in proportion to the load can
reduce the energy consumption of the system. The rate of flow
change should be a maximum of 10 percent of the flow per minute.
For example, if the maximum design flow rate is 200 gpm and is to
be reduced to a flow rate of 140 gpm, the flow change is 60 gpm.
Ten percent of 200 gpm equals a change of 20 gpm per minute,
or a minimum of three minutes to go from the maximum flow to
the desired flow.
If the flow rate falls below the minimum allowable, large
reductions in heat transfer can occur. If the flow rate exceeds the
maximum, excessive pressure drop and tube erosion can occur.
Figure 9. Factory installed strainer


Evaporator freezing can be a problem in the application of air-
cooled water chillers in sub-zero temperature areas. To protect
against freezing, the evaporator comes with insulation and an
electric heater. Although the evaporator is equipped with freeze
protection, it does not protect the water piping external to the unit
or the evaporator itself if there is a power failure or the heater
burns out, or if the chiller cannot control the chilled water pumps.
Use one of the following recommendations for additional freeze
protection:
! CAUTION !
Improper use of detergents, chemicals and additives in the
cooling system water can adversely affect the performance
of the chiller and potentially result in repair costs not covered
under warranty. Any decision to use these products is at
the discretion of the owner/occupant/operator/user, and the
owner/occupant/operator/user assumes full responsibility for
any damage that may occur due to their use.
1. If the unit will not operate during the winter, drain the evapora-
tor and cold water lines and flush them with glycol.
2. Add a glycol solution to the chilled water system. Breakage
protection should be approximately 10°F below the minimum
design ambient temperature.
3. Insulate exposed piping.
4. Add thermostatically controlled heat by wrapping lines with
heat tape.
5. When glycol is added to the water system for freeze protec-
tion, the refrigerant suction pressure will be lower, the cooling
performance will be lower and the water side pressure drop
will be higher.

It is important that the chilled water pumps are connected to
and controlled by the chiller microprocessor. The controller will
activate the pump whenever at least one chiller circuit is enabled
for operation, whether there is a call for cooling or not. This helps
ensure proper start-up sequencing of the unit. The pump will
also turn on when the water temperature is below the freeze set
point for longer than the specified time to help prevent evaporator
freeze-up. Connection points are shown in the field wiring diagram
beginning on page 25.
Water systems should be cleaned and flushed prior to chiller
installation. Water testing and treatment should be verified during
initial chiller installation/commissioning and should be maintained
on an ongoing basis by water treatment professionals.
! CAUTION !
Adding glycol or draining the system is the recommended
method of freeze protection. If the chiller does not have
the ability to control the pumps and the water system is not
drained or does not have adequate glycol at subfreezing
temperatures, catastrophic evaporator failure can occur.

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
FLOW SWITCH
All chillers require a chilled water flow switch to verify that there
is adequate water flow through the evaporator and to shut down
the unit if necessary to prevent evaporator freeze-up under low or
no flow conditions.
A factory-installed thermal dispersion flow switch will be installed
on packaged models. On remote evaporator models, the flow
switch can be supplied separately in the field, or optionally
shipped loose for field installation. Terminals for field mounting
and wiring of the water flow switch are provided in the unit control
center.
Wire from the Y and R terminals on the switch to the terminals
on the unit control panel shown in the field wiring diagrams, page
23 through page 34. Mount the flow switch on the outlet water
line to shut off the unit when water flow is interrupted. A flow
switch is an equipment protection control and should never be
used to cycle the unit. Installation should be in accordance with
the manufacturer’s instructions included with the switch. Flow
switches should be calibrated to shut the unit off when operating
below the minimum flow rate.
There is also a set of paddle switch contacts on the switch that
can be used for an indicator light or alarm to indicate when a “no
flow” condition exists. Protect any flow switch that is installed
outdoors from freezing. It is not recommended that differential
pressure switches be installed outdoors. They may freeze and
not indicate a no-flow condition.
Protect any flow switches that are installed outdoors from freezing.
It is not recommended to install differential pressure switches
outdoors. They may freeze and not indicate a no-flow condition.
GLYCOL SOLUTIONS
The use of glycol can affect system performance depending on
its concentration and should be taken into account during initial
system design. When glycol is added to the chilled water system
to protect against freezing, it should be noted that the refrigerant
suction pressure will be lower, the cooling performance will
be lower and the water side pressure drop will be higher. The
reduction in performance depends on the glycol concentration
and temperature. Test the coolant with a clean and accurate
glycol refractometer to determine the freezing point.
! CAUTION !
The installed glycol level must match the nominal glycol
percentage indicated on the submitted chiller technical data
sheet. Failure to meet the nominal glycol percentage may
result in damage to the unit and loss of unit warranty.
! CAUTION !
Do not use automotive grade antifreeze. Industrial grade
glycols should be used. Automotive antifreeze contains
inhibitors that will cause plaque formation on the cooler
evaporator copper tubes. The type and handling of the glycol
used should be consistent with local codes.
If the chiller is not allowed to control the pump, the following
problems may occur:
1. If the chiller attempts to start without first starting the pump,
the chiller will lock out with the no flow alarm and require a
manual restart.
2. If the chiller evaporator water temperature drops below the
“freezing set point”, the chiller will attempt to start the water
pumps to prevent the evaporator from freezing.
3. If the chiller does not have the ability to start the pumps, the
chiller will alarm for lack of water flow.
4. If the chiller does not have the ability to control the pumps
and the water system must not be drained in sub-zero tem-
peratures or contain glycol, the chiller may be subject to ca-
tastrophic evaporator failure due to freezing. The evaporator
freeze-up rate is based on the evaporator heater and pump
operation. The external brazed plate heater alone may not
be able to adequately protect the evaporator from freezing
without water circulation. 
The standard CLIM Series chiller coils have an aluminum
alloy microchannel design with a series of flat tubes containing
multiple parallel flow microchannels placed between the coolant
manifolds. The microchannel coils are designed to withstand the
synthetic acidified seawater acidified (SWAAT) mist test of over
1000 hours (ASTM G85-02) at 120°F (49°C) with 0% loss and
without developing leaks.
Epoxy coating: is an extremely flexible and durable water-based
polymer coating that is uniformly applied to all coil surfaces by
a multi-step electrostatic submerged coating process. Epoxy-
coated coils offer ASTM B117-90 salt spray resistance of more
than 10,000 hours, applied to both the coil and the coil heads.
Epoxy-coated coils also receive a UV-resistant urethane topcoat
to provide superior resistance to degradation from direct sunlight.
Table 3. Coil and liner selection matrix
Coil Option Non-
corrosive¹
Unpolluted
marine² Industrial³
Combined
marine-

Standard
Microchannel +++ - - -
Epoxy
Coated coils +++ +++ +++ ++
NOTES:
1. Non-corrosive environments can be estimated by the
appearance of existing equipment in the immediate area
where the chiller is to be placed.
2. -
mity to the coast, as well as the prevailing wind direction.
3. Industrial contaminants can be general or localized, de-
pending on the immediate source of contamination (e.g.

4. The marine-industrial combination is influenced by
proximity to the coast, prevailing winds, and general and
localized sources of pollution.
Considerations

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Figure 10. CLIM refrigeration schematics


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
Figure 11. CLIM heat pump refrigeration schematic

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Figure 12. CLIM 7.5 Tr


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
Figure 13. CLIM 10 Tr

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
Figure 14. CLIM 12.5 Tr

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Figure 15. CLIM


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Figure 16. CLIM heat pump
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iom-clim-cf-eng www.clima-ex.com
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Figure 17. CLIM tandem 50 Tr