MTA TAEevo M05 Operating and maintenance manual

CHILLERS
MAINTENANCE AND OPERATING MANUAL
38178800511
Original instructions
TAEevo M05-M10

TAEevo M05-M10
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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
I NDEX
I NDEX ............................................................................................................................................................................1
G
ENERAL INFORMATION .............................................................................................................................................2
1.1 Terminology..................................................................................................... 2
S AFETY ..........................................................................................................................................................................3
2.1 General............................................................................................................. 3
2.2 General precautions ......................................................................................... 3
2.3 Safety schedule ................................................................................................ 4
T ECHNICAL DATA .........................................................................................................................................................6
3.1 Data plate and meaning of abbreviations......................................................... 6
D ESCRIPTION ................................................................................................................................................................8
4.1 Operating principle .......................................................................................... 8
4.2 Overall dimensions .......................................................................................... 8
4.3 Minimum distances from walls........................................................................ 8
4.4 Water and refrigerant circuits .......................................................................... 8
4.5 Electrical circuit............................................................................................... 9
I NSTALLATION ..............................................................................................................................................................9
5.1 Inspection......................................................................................................... 9
5.2 Positioning ....................................................................................................... 9
5.3 Antifreeze protection ....................................................................................... 9
5.4 Plumbing connections.................................................................................... 10
5.5 Electrical connections .................................................................................... 10
S TART UP ....................................................................................................................................................................10
E
LECTRONIC CONTROL BOARD .................................................................................................................................11
7.1 Introduction.................................................................................................... 11
7.2 User interface-key functions.......................................................................... 11
7.3 Display ........................................................................................................... 12
7.4 Automatic re-start .......................................................................................... 12
7.5 Compressor control........................................................................................ 12
7.6 Storage temperature alarm ............................................................................. 12
7.7 Alarms signalling........................................................................................... 13
7.8 Unit general parameters ................................................................................. 13
7.9 Digital input alarms ...................................................................................... 16
7.10 Other parameters........................................................................................... 17
7.11 “i1F” parameter digital input ......................................................................... 17
H IGH PRESSURE SWITCH (HP) ..................................................................................................................................18
O
PERATION AND MAINTENANCE ...............................................................................................................................18
9.1 Operation ....................................................................................................... 18
9.2 Maintenance................................................................................................... 18
T ROUBLE SHOOTING ..................................................................................................................................................20

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The datainside this manual are not binding and they can be modified by the manufacturer without notice. Allrights reserved.
C HAPTER 1
G ENERAL INFORMATION
1.1Terminology
The machines described in this manual are called “WATER CHILLERS” or simply “CHILLERS”. These chillers have been
designed to cool a liquid flow.
In most applications,the liquid to be cooled is water and the term “WATER” will be used even if the liquid to be cooled is different from water
(e.g.a mixture of water and glycol).
The liquid to be cooled must becompatible with the materials used.
This manual is written for those responsible for the installation, useand maintenance of the chiller.
Here below the term “PRESSURE” will be used to indicate the gauge pressure.
The following symbols are shown on the stickers on the unit as well as on the overall dimension drawing and refrigeration circuits in thismanual.
Their meaning is the following:
1.1.1 Meaning of the code
The chillers described in this manual are defined by a code with a precisemeaning.
TAEevo Mxx:
Chillerwith Tank, Air-cooled condenser, HErmetic compressor, M=single-phase power supply. The table below shows the nominal
cooling capacity:
(*) Referred to the following operating conditions: water inlet 20°C, water outlet 15°C, ambient temperature 25°C.
ATTENTION
This manual provides the user, installer and maintenance technician with all the technical information required for installation, operation and
carrying out routine maintenance operations to ensure long life.
If spare parts are required, this must be original.
Requests for SPARE PARTS and for any INFORMATION concerning the unit must be sent to the distributor or to the nearest service centre,
providing the MODEL and MACHINE NUMBER shown on the machine data plate and on the first page of this manual.
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Unit water inlet Unit water outlet
Indications for lifting the unit Water drainage point from the
machine
Water filling point Cooling air flow (for air-condensed
units)
Electric shock risk Direction of the refrigerant fluid
flow and water circuit
Table 1 S
YMBOLS
Model Nominal cooling capacity (*) [W]
TAEevo M05 2500
TAEevo M10 4400

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
C HAPTER 2
S AFETY
This machinery was designed to be safe in the use for which it was planned provided that it is installed, started up and maintained in accordance
with the instructions contained in this manual.
The manual must therefore be studied by all those who want to install, use or maintain the machinery.
The machine contains electrical components which operate at the line voltage, and also moving parts as fans and/or pumps. It must therefore be
isolated from the electricity supply network before being opened.
All maintenance operations which require access to the machinery must be carried out by expert or appropriately trained persons who have a
perfect knowledge of the necessary precautions.
2.1 General
When handling or maintaining the unit and all auxiliary equipment, the personnel must operate with care observing all instructions concerning
health and safety at installation site.
Most accidents which occur during the operation and maintenance of the machinery are a result of failure to observe basic safety rules or
precautions. An accident can often be avoided by recognising a situation that is potentially hazardous.
The user should make sure that all personnel concerned with operation and maintenance of the unit and all auxiliary equipment have read and
understood all warnings, cautions, prohibitions and notes written in this manual as well as on the unit.
Improper operation or maintenance of the unit and auxiliary equipment could be dangerous and result in an accident causing injury or death.
Do not operate the unit and auxiliary equipment until the instructions in the Operating section of this manual are understood by all personnel
concerned. Do not carry out any servicing, repair or maintenance work on the unit and auxiliary equipment until the instructions in the relevant
sections of this manual are clearly understood by all personnel concerned.
We cannot anticipate every possible circumstance which might represent a potential hazard. The warnings in this manual are therefore not all-
inclusive. If the user employs an operating procedure, an item of equipment or a method of working which is not specifically recommended, he
must ensure that the unit and auxiliary equipment will not be damaged or made unsafe and that there is no risk to persons or property.
ATTENTION
The hot / cold water produced by MTA units cannot be used directly for domestic hygiene or food applications. In the case
of such applications, the installer is responsible for fitting an intermediate exchanger.
If the intermediate exchanger is not fitted, the installer should affix a notice stating "non-drinking water".
2.2 General precautions
2.2.1 Liquids to be cooled
The liquids to be cooled must be compatible with the materials used.
These can be water or mixtures of water and glycol, for example. In case of distilled or demineralised water, check the compatibility with
materials.
It is advisable to work with pH between 7 and 8. If using chemical additives consult your supplier for more information concerning compatibility
with materials in contact with the process fluid of the chiller.
The liquids to be cooled must not be flammable.
ATTENTION
If the liquids to be cooled contains dangerous substances (e.g. ethylene glycol) it is very important to collect any liquid which leaks because it
could cause damages to the ambient. Furthermore, when the chiller is no longer used, dangerous liquids must be disposed of by firms specialised
and authorised for treating them.
2.2.2 Lifting and carriage precautions
Handling the chillers using fork-lift trucks must be carried out in accordance with the drawings in annexes: TOC xxx.
2.2.3 Installation precautions
For the connection to the electrical net see chapter “Installation” .
2.2.4 Precautions during operation
Operation must be carried out by competent personnel under a qualified supervisor. All the cooled water or cooling water piping must be
painted or clearly marked in accordance with local safety regulations in the place of installation.
ATTENTION
Never remove or tamper with the safety devices, guards or insulation materials fitted to the unit or auxiliary equipment.
All electrical connections must comply with local codes. The unit and auxiliary equipment must be earthen and protected by fuses against short-
circuits and overloading.
ATTENTION
Do not open any electrical panels or cabinets while voltage.

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The datainside this manual are not binding and they can be modified by the manufacturer without notice. Allrights reserved.
2.2.5 Maintenance and repair precautions
Maintenance, overhaul and repair workmust becarried out bycompetent personnel under a qualified supervisor.
ATTENTION
When disposing of parts and waste materialofany kindmake sure that there is no pollution of any drain or natural water-course and that no
burning ofwaste takes place which could cause pollution of the air. Protect the environment by using only approved methods of disposal.
Ifreplacement parts are needed use onlyoriginal spares.
Keep a written record of all maintenance and repair work carried out on the unit and auxiliary equipment.The frequency and the nature of the
work required over a period can reveal adverseoperating conditions which should be corrected.
Use only refrigerant gas specified on the plate of the unit.
Make sure that all instructions concerning operation and maintenance are strictly followed and that the complete unit, with all accessories and
safety devices, is keptin goodworking order.
The accuracy of temperature/pressure measuring devices must be checked regularly; renew measuring devices when the measurement tolerance
isoutside the specified range of values.
Keep the machine clean at all times.Protect components and exposed openingsbycovering them,for example, with clean cloth or tape during
maintenance and repair work.
Do not weld orcarryout any operation which produces heat near asystem which contains oil or flammable liquids. The systems which may
contain oil orflammable liquids must be completely drained and cleaned (with steam, forexample), before carrying out these operations. Never
weld, nor modify in any way,a vessel which may be put under pressure.
Toprevent an increase in working temperature and pressure, inspect and clean heattransfersurfaces (i.e. condenser fins) regularly. For every
unit establish a suitable time schedule forcleaning operations.
Avoid damageto safety valves and other pressure relief devices. Avoid plugging by paint, oil or dirt accumulation.
Precautions must be taken when carrying out welding or any repair operation which generates heat, flames or sparks. The adjacent components
must always be screened with non-flammable material and if the operation is to be carriedout near any part of the lubrication system, orcloseto
a component which may contain oil, the system must first bethoroughly purged, preferablyby steam cleaning.
Never use a light source with an open flame to inspect any part of the machine.
Beforedismantlingany partof the unit ensure thatall heavy movable parts are secured.
When a repair has beencompleted, makesure no tools, loose partsor rags are left in, or on the machine.
All guards must be reinstated after carrying out repair or maintenance work.
Donot use flammable liquid to clean any component during operation. If chlorinated hydrocarbonnon-flammable fluidsare used for
cleaning, safety precautions must be taken against any toxic vapours which may be released.
Beforeremoving any panels or dismantlingany partof the unit, carry out the following operations:
•Isolate the chiller unit from the main electrical power supply by disconnecting the cable from the electrical power source.
Lock the isolator in the “OFF” position with a lock.
• Attach a warning label to the main isolator switch conveying: “WORK IN PROGRESS - DON NOT APPLY VOLTAGE”. Do
not switch on electrical power or attempt to start the unit if a warning label is attached.
Coloured tracers can be used in service-maintenance operations.
Inspect all refrigerant circuit joints including connectors, flanges, and more generally all critical points (open joints) in order to prevent possible
leakage of refrigerant gas.
2.2.6 Refrigerant gases
R407C is used as refrigerant in these units.
Never attempt to mix refrigerant gases.
To clean out a very heavily contaminated refrigerant system, e.g. after a refrigerant compressor burnout, a qualified refrigeration engineer must
be consulted to carry out the task.
The manufacturer's instructions and local safety regulations should always be observed when handling and storing high pressure gas cylinders.
2.3 Safety schedule
R407C
Denomination: 23% Difluoromethane (R32); 25% Pentafluoroethane (R125); 52% R134a
INDICATION OF THE DANGERS
Major dangers: Asphyxia
Specific dangers: Rapid evaporation can cause freezing
FIRST AID MEASURES
General information: Do not give anything to unconscious persons
Inhalation: Take the person outdoors. Use oxygen or artificial respiration if necessary. Do not administer
adrenaline or similar substances
Contact with the eyes: Thoroughly wash with plenty of water for at least 15 minutes and call a doctor
Contact with the skin: Wash immediately with plenty of water.
Remove contaminated clothing immediately

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
FIRE-FIGHTING MEASURES
Means of extinction: Any means
Specific dangers: Pressure increase
Specific methods: Cool the containers with water sprays
MEASURES IN THE EVENT OF ACCIDENTAL LEAKAGE
Individual precautions: Evacuate personnel to safe areas. Provide adequate ventilation. Use means of personal protection
Environmental precautions: Evaporates
Cleaning methods: Evaporates
HANDLING AND STORAGE
Handling
technical measures/ precautions: Ensure sufficient air change and/or extraction in the work areas
recommendations for safe use: Do not inhale vapours or aerosols
Storage: Close properly and store in a cool, dry well-ventilated place. Store in its original containers.
Incompatible products: explosives, flammable materials, organic peroxide
CONTROL OF EXPOSURE/INDIVIDUAL PROTECTION
Control parameters: AEL (8-h e 12-h TWA) = 1000 ml/m3 for each of the three components
Respiratory protection: For rescue and maintenance work in tanks, use autonomous breathing apparatus. The vapours are
heavier than air and can cause suffocation, reducing the oxygen available for breathing
Protection of the eyes: Safety goggles
Protection of the hands: Rubber gloves
Hygiene measures: Do not smoke
PHYSICAL AND CHEMICAL PROPERTIES
Colour: Colourless
Odour: Similar to ether
Boiling point: -43.9°C / -47.0°F at atm. press.
Flammability point: Non flammable
Relative density: 1.138 kg/l at 25°C
Solubility in water: Negligible
STABILITY AND REACTIVITY
Stability: No reactivity if used with the relative instructions
Materials to avoid: Alkaline metal, earthy alkaline metals, granulated metals salts, Al, Zn, Be, etc. in powder.
Hazardous decomposition products: Halogen acids, traces of carbonyl halides
TOXICOLOGICAL INFORMATION
Acute toxicity: (R32) LC50/inhalation/4 hours/lab. rats >760 ml/l
(R125) LC50/inhalation/4 hours/lab. rats >3480 mg/l
(R134a) ALC/inhalation/4 hours/lab. rats = 567 ml/l
Local effects: Concentrations substantially above the TLV can cause narcotic effects. Inhalation of products in
decomposition can lead to respiratory difficulty (pulmonary oedema)
Long-term toxicity: Has not shown any cancerogenic, teratogenic or mutagenic effects in experiments on animals
ECOLOGICAL INFORMATION
Global warming potential HGWP
(R11=1):
R125: 0.84 - R134a: 0.28
Ozone depletion potential ODP
(R11=1):
0
Considerations on disposal: Usable with reconditioning
R407C

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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
C HAPTER 3
T ECHNICAL DATA
3.1 Data plate and meaning of abbreviations
The main technical data are given on the machine data plate:
On the wiring diagram you will find the following abbreviations (see the first column in the table above):
ATTENTION
The performance of the refrigerant depends principally on the flow rate and temperature of the cooled water and on the temperature of the
condenser cooling fluid (ambient temperature or water input temperature respectively, depending on whether the condenser is air or water-
cooled). These data are defined in the offer and it is to these that reference should be made.
MODEL and CODE The model number and the code identify the size of the unit (see Chapter 1 “General information“)
and the type of construction.
MANUAL This is the code number of the manual.
SERIAL NUMBER This is the construction number of the unit.
MANUFACTURING YEAR This is the year of the final test of the unit.
VOLTAGE/PHASE/
FREQUENCY
Electric alimentation characteristics.
MAX. CONSUMPTION
(Imax)
This is electrical current consumed by the unit during the limit working conditions (refrigerant
condensing temperature is 65°C = 149°F; refrigerant evaporating temperature is 10°C = 50°F).
INSTALLED POWER
(Pmax)
It is the power absorbed by the unit during the limit working conditions (refrigerant condensing
temperature is 65°C = 149°F; refrigerant evaporating temperature is 10°C = 50°F).
PROTECTION As defined by the EN 60529 European standard.
REFRIGERANT This is the refrigerant fluid in the unit.
REFRIGERANT QUANTITY This is the quantity of refrigerant fluid contained in the unit.
MAX. COOLING PRESSURE This is the design pressure of the refrigeration circuit.
MAX. COOLING
TEMPERATURE
This is the design temperature of the refrigeration circuit.
USER CIRCUIT FLUID Fluid cooled by the unit (normally water).
MAX. OPERATING
PRESSURE
Max. design pressure of the user circuit.
MAX. TEMPERATURE Design temperature of the user circuit; this should not be confused with the maximum working
temperature which is established when the offer is made.
CONDENSER COOLING
FLUID
Fluid used by the unit to cool the condenser (this data is not present if the unit is air cooled
condensed).
MAX. OPERATING
PRESSURE
Max. design pressure of the condenser cooling circuit (this data is not present if the unit is air cooled
condensed).
MAX. TEMPERATURE Max. design temperature of the condenser cooling circuit (this data is not present if the unit is air
cooled condensed).
SOUND PRESSURE LEVEL Sound pressure level in free field in hemispheric irradiation conditions (open field) at a distance of 1
m from the unit, condenser side, and at a distance of 1.6 m from the ground.
AMBIENT TEMPERATURE Min. and max. cooling air temperature value.
WEIGHT This is the approximate weight of the unit before packing.
Table 2 D
ATA PLATE AND MEANING OF ABBREVIATIONS
I
MAX
max. electric current
P
MAX
max. power
I
LR
electric current with rotor stopped

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
Other data for standard units:
NOTE
Standard pumps are of peripheral type, so the pump heads indicated in the table are respectively at no flow and at max. flow. It is possible for
the pump installed to be different from the standard one. In this case reference should be made to the data in the offer.
NOTE
The pump must never run dry.
3.1.1 Sound Level Measurements
* at distance of 1 metre (3,2 FT)
** global
Test conditions
Noise levels refer to operation of the unit at full load in nominal conditions.
Sound pressure level in hemispherical irradiation conditions at a distance of 1 m (3,2 FT) from the condenser side of the unit and height of 1.6 m
(5,2 FT) from the ground. Values tolerance ± 2 dB.
Sound power level: in compliance with ISO 3744
3.1.2 Limit operating conditions
(1) For temperatures below +5°C use antifreeze solutions (see 5.3 “Antifreeze protection” ).
TAEevo MODEL M05 M10
Tank capacity [litres] 25 25
P3 NoFe
water flow rate [l/min] 8/40 8/40
pump head [bar] 4/0 4/0
nominal power [kW] 0,33 0,33
type peripheric
Table 3 P
ERFORMANCES
Lp dB(A) * Lw dB(A) **
TAEevo M05 63,3 76,3
TAEevo M10 63,3 76,3
Minimum Maximum
Ambient air temperature °C 5 40
Evaporator water inlet temperature °C 5 35
Evaporator water outlet temperature °C 0(1) 30
0
5
10
15
20
25
30
35
40
45
50
0 10203040
PRESSURE mca
FLOW RATE l/min
PUMP HEADS

TAEevo M05-M10
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The datainside this manual are not binding and they can be modified by the manufacturer without notice. Allrights reserved.
C HAPTER 4
D ESCRIPTION
4.1Operating principle
All the chillers described in this manual work on the basis of the same principle. A refrigerant circuit cools the exchange surface of an
evaporator through which the liquid to be cooled passes.
The evaporator finds inside the tank.
The refrigerant compressor is controlled by an electronic control unit.
The electronic control unit controls the temperature of the water in the tank to maintainitwithin preset limits.
Alsoconsult Chapter 7 “Electronic control board“.
4.1.1 Compressor
Hermetic or rotary type, cooled by the aspirated refrigerant and equipped with thermal cutout protection.
The compressor is mounted on anti-vibration supports.
4.1.2 Casing
Built with galvanised panels and painted with epoxy resins.
The panels have no structural function so that they can easily be removed to permit total access to all the components.
4.1.3 Materials in contact with the liquid to be cooled
Stainless steel, copper, brass, plastics.
4.1.4 Condenser and fan
Air cooled condensers are used without steel tubes; in this case it is the fins that form the tube by means of long collars inserted one inside the
other and brazed with copper in a controlled atmosphere oven. The condensing coils are equipped with an axial fan complete with protective
grille. The fan is of the “pressure” type: the air is drawn from the interior of the unit and expelled into the atmosphere, flowing through the
condensing coil along its route.
4.1.5 Evaporator
Consisting of a copper tube in tube exchanger. The water flows in counter-current to the evaporating refrigerant.
4.1.6 Pump
Of peripheric type, body in brass/bronze, impeller in brass, shaft in stainless steel.
ATTENTION
If the pump would clump, follow the instructions in paragraph 9.2.2 “Unjamming the pump”
NOTE
The pump must never run dry.
4.1.7 Accumulation tank
In these units are used stainless steel accumulation tanks.
TAEevo M are furnished with cylindrical tank, finding in vertical position over the unit’s base.
The tanks, hermetically closed, contain the evaporator.
The hydraulic circuit is of atmospherical type and by a plastic receptacle with a capacity of about 1,5 litres,
complete with a plug (A), it is possible to fill the unit.
This receptacle is fixed to the machine casing in which there is a slot (B) for inspecting the water level and a
hole which permits access to the filling plug from the outside.
4.2 Overall dimensions
See enclosures RED xxx
4.3 Minimum distances from walls
See enclosures RED xxx
4.4 Water and refrigerant circuits
See enclosures REF xxx
4.4.1 Water circuit
The water flowing through the evaporator pipes cools and flows into the tank.
Then the water is sucked by a peripheric pump which sends it directly to the user.
The pump delivery is connected to the evaporator by a by-pass pipe which guarantees a minimum water flow through the pump should a pipe at
any point of the hydraulic circuit be closed by mistake.
A
B

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MAINTENANCE AND OPERATING MANUAL
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A pressuregauge is connected to the pump output. It indicates the outlet water pressure of the plant.
4.4.2 Refrigerantcircuit
The refrigerant is pumped by the refrigerant compressor to the condenser. The condenser is a heat exchanger and is cooledby an air flow
produced by afan.
After the condenser, the refrigerant liquid passes through a drying filter and a laminating element (capillary tube).
The refrigerant then enters the evaporator’scircuit in which it flows incounter-current with respect to the water to be cooled.
When it exitsthe evaporator, the refrigerant is again sucked by the compressor and the cycle repeats itself.
The refrigerant circuit is also furnished with a highpressure switch (HP) of manual reset type.
4.5 Electrical circuit
See the enclosed electrical diagrams.
C HAPTER 5
I NSTALLATION
ATTENTION
Before carrying out the installation or operating on this machine, ensure that all the personnel has readand understood the “Safety” chapter
in this manual.
5.1 Inspection
Immediately after uncrating, inspect the unit.
5.2 Positioning
1. The chiller mustbe installed indoors only.
2. The room must be well ventilated. In some casesit may be necessary to install fans or extractors to limit the temperature of the
room.
3. Theambient air must be clean and not contain flammable gas or solvents. The minimum and maximum working ambient
temperatures are specified on the unit data plate. In extreme temperature conditions, the protection devices may trip.
4. Themachine can be positioned on any flat surface capable of supportingits weight.
5. Leave at least one metre in front of the unit to permit access during service operations (see chapter 4.2 “Overall dimensions” ).
6. Do not obstruct ordisturb the condenser's flowof cooling air. Position the chiller in such a way that the cooling air cannot
recirculate in the intake grilles. Ensure that the chiller isnot subject to warmair from the cooling systems of other machines.
5.3 Antifreeze protection
Even if the minimum working ambient temperature is above 0°C it is possible for the chiller- duringstoppages in the cold seasons - to find
itself in an environment with a temperature below 0°C. In these cases, if the chilleris not emptied, antifreeze (ethyleneglycol) must be
added in the following percentages to prevent the formation of ice:
According to the outlet temperature of cooled water, it is necessary to add the following antifreeze (ethylene glycol) percentages in order to
avoid freezing:
Ambient temperature
up to [°C]
Ethylene Glycol
[% in weight]
00
-5 15
-10 25
-15 30
-20 40
Water outlet minimum
temperature [°C]
Ethylene Glycol
[% in weight]
0<T 15

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The datainside this manual are not binding and they can be modified by the manufacturer without notice. Allrights reserved.
5.4 Plumbing connections
It is recommended to insert a filter of “Y” type on the water inlet connection, in order to stop
eventual impurities of water which could cause big damages tothe pump.
1.Connect the chillerto the water piping. See the overall dimension drawings forthe size and
type of connections.
2.Provide two cocks (inlet and outlet) to by-pass the machine for maintenance purposeswithout
havingto empty the water circuit of the user.
3.Fill the water receptacle by unscrewing the plug of the receptacle and filling the circuit with
water (for example using a hose connected to the cock) until the level in the receptacle is about
half-way up the slot. The filling of tank before starting-up the unit is very important as the pump
can not operate without water.
The receptacle used for filling the circuit acts as an open expansion tank. It is therefore necessary
to pay attention to the volumesand dimensions in play.
5.5 Electrical connections
Check that the power supply voltage and frequency match the requirements ofthe unit as shown on the unit data plate and they are within the
tolerances given inthe wiring diagram.
Ensure that the electrical installation complies with local wiring and safety regulations.
Check that there is a neutral line in the electrical installation and it is earthen in the transformer cabin (TN system in compliance with IEC 364 -
HD 384 - CEI 64-8) or that this is done by the electricity supply company (TT system).
The electrical supply cable must be connected to the electrical installation and pay attention to connect the neutral wire of the unit (indicated by
the appropriate colour) to the neutral wire of the installation.
The electrical supplycable must be the one supplied with the unit and/or indicated in the electrical wiring diagrams.
Atthe beginning of the electrical supply cable
1. must be guaranteed a protection against direct contacts with a protection degree of IP2X or IPXXB at least;
2. must be installed protection devices that:
•protect against overcurrents, the power supply cable and the cables not protected by the electrical plant of the machine;
(see information in the electrical wiring)
•limit the 17 kA peak short circuit current to its own nominal cut-off power when the short circuit current at the operation point is
higher than 10 kA effective;
•protect against indirect contacts on the unit, (such as short-circuiting between the phase and protection circuit) by cutting off the
supply automatically (see IEC364 - HD 384, CEI 64-8);
Usea differential switch (normally with operation nominal differential current of 0.03 A)
•protect against phase failures where the electrical supply is three-phase.
For protection circuit dimensions, please referto the data specified in the wiring diagrams attached (max. absorption, pick-up currents,cables
section).
C HAPTER 6
S TART UP
ATTENTION
Before startingup or operating these units besure that all personnel have read and understood the “Safety” section of this manual.
1. Check that the machine's on/offvalves are open.
2. Check that the level of the liquid in the receptacle is at about the middle of the graduated scale.
3. Check that the ambient temperature is within the limits indicated on the machine data plate.
4. Check that the main switch isin the OFF position (“O”).
5. Check that the power supply voltage is correct.
6. Turnthe machine main switch ON (“I”).The display lights on to indicate the presence of tension.
7. The pump is not ready to start.
If with thefirst start-up, there is a high ambient temperature and the temperature of the water in the hydraulic circuit is much higher than the
working value (e.g. 25-30°C) this means that the chiller starts up overloaded with the consequence of possible tripping of the compressor

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The data inside this manual are not binding and theycan be modified by the manufacturer without notice. Allrights reserved.
protection devices. Toreduce this overload, a chilleroutlet valve can be gradually (but not totally!) closed to reduce the flow of
water passing through it.Openthe valve as the water temperature in the hydraulic circuit reachesthe working value.
If the thermal load is lower than that produced by the chiller,the water temperature drops until it reaches the set point.
With operating pump, if the unit is in normal operation, the water should be at mid-slot in the receptacle.
C HAPTER 7
E LECTRONIC CONTROL BOARD
7.1 Introduction
The main function of the electronic control board are:
• complete management of the alarms;
• control of the temperature at evaporator outlet.
The electronic control board allows to control the following devices:
•pump;
• compressor;
• alarm signalling devices.
7.2 User interface-key functions
7.2.1 Key combinations
Key Action Function
Pressed once
The set-point will be displayed
Pressed for 3 seconds
Chiller set-point modification, the °C LED flashes, use keys to change the
set-point. To save the parameter press key or simply wait 15 sec.
Pressed once
Shows maximum temperature value
In the programming phase scrolls through the parameter codes or increases their value
Pressed once
Shows minimum temperature value
In the programming phase scrolls through parameter codes or decreases their value
Pressed once
Switches device on/off
Pressed once
Starts a defrost cycle (not active function)
Key Function
Lock/ unlock the keypad:
Hold down both keys until the message "POF" is displayed. Repeat the procedure to unlock, the message "Pon" is
displayed
To access the hidden menu:
Open programming mode by holding down the key combination for 3 seconds (access is granted to Pr1
parameters);
In programming mode (Pr1) press the key combination for at least 7 seconds: the message "Pr2" is displayed
(access is granted to Pr2 parameters in the hidden menu)
Each parameter can be moved from Pr2 to Pr1 and vice versa.
To quit the programming area
+
+
+

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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.2.2 MEANING OF LEDs
The table below describes the LED functions:
NOTE
(*) the new value set is saved also when quitting without pressing the SET key.
7.3 Display
The display is composed of 3 digits. Temperature detected by probe (-BT1) is displayed with decimal resolution, the field of display is: -
50÷110°C (-58÷230°F).
7.4 Automatic re-start
After a loss of power, the unit will re-start automatically if it was ON, observing the selected operating modality, but not if it was OFF before the
loss of power.
7.5 Compressor control
The compressor relay is activated to maintain a given temperature value
established by the set-point. Hysteresis Hy is automatically added to the set-
point. If the temperature value increases and reaches the set-point + hysteresis
value, the compressor is started and then stopped when the temperature value
returns to the set-point value. If the probe (-BT1) develops a fault, the
activation or deactivation of the output are managed by time by means of the
parameters “COn” and “COF”.
7.6 Storage temperature alarm
To view the minimum temperature reached:
Press , the message "Lo" is displayed followed by the minimum temperature reached.
To view the maximum temperature reached:
Press , the message "Hi" is displayed followed by the maximum temperature reached.
To delete the maximum or minimum temperature reached:
When the stored temperature value is displayed, hold down key for several seconds (the flashing message "rSt" is displayed).
LED MODE MEANING

on Compressor running

Flashing Time lag between consecutive compressor starts

on Defrost in progress (Not active function)

Flashing Dripping in progress (Not active function)
B
on Fans running (Not active function)
B
Flashing Fan start delay in progress

on Temperature alarm

on Continuous cycle in progress

on Energy saving in progress (Function not active)
 / 
on Unit of measurement
 / 
Flashing Programming
SET+HY
SET
Temper.
Time
Compr.
ON

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.7 Alarms signalling
The “P1” and “P2” probe alarms trip few seconds after the probe develops a fault; they switch off automatically few seconds after the probe
starts to function properly. Before renewing the probe check the connections.
The “HA” and “LA” temperature alarms switch off automatically as soon as the thermostat temperature returns to normal.
The external EA and CA alarms switch off as soon as the digital input is deactivated.
If the I.D. is configured as a pressure switch (i1F=bAL) the reset is performed manually by switching off the instrument.
7.8 Unit general parameters
The unit is factory-equipped with preset parameters, which are values calculated for standard applications. If it becomes necessary to edit the
values of any of the general parameters, we recommend contacting your Service Centre.
Failure to observe this prescription exposes the user and unit to potential risks.
ATTENTION
The manufacturer declines all possible warranty claims concerning performances and safety standards following arbitrary modification of the
parameters by the user.
7.8.1 Control parameters
Message Cause Outputs
P1 Thermostat probe (-BT1) faulty Compressor output according to parameters “COn” and “COF”
(alarm relay changeover)
P2 Evaporator probe faulty Defrost by time (function not active)
HA High temperature alarm Not modified (alarm relay changeover)
LA Low temperature alarm Not modified (function not active, alarm relay changeover)
EA External alarm Not modified (alarm relay changeover)
CA High pressure switch alarm (HP)
(i1F=bAL)
Loads off (alarm relay changeover)
dA Door open Loads according to “odC” (alarm relay changeover)
CA Pressure switch alarm (i1F=PAL) Loads off (alarm relay changeover)
Visible parameters The visible parameters are set during the design stage. If it becomes necessary to make a hidden parameter visible,
follow the procedure described in chapter 7.2.2 “MEANING OF LEDs”
Parameter Description Min. Max. U.M. Factory
settings
Set Set-point The setting for water temperature at the unit outlet -50 110 °C 7
Hy
Hysteresis Set-point trip differential. The hysteresis value is added to the
set-point: the relay is energised when the temperature reaches
the set-point + hysteresis value and de-energised when the
temperature returns to the set-point value.
0,1 25 °C 4
LS Minimum set-
point value
Establishes the set-point minimum value. -50 SET °C 0
US Maximum set-
point value
Establishes the set-point maximum value. SET 110 °C 30
Ot Thermostat probe
calibration
Serves to calibrate the thermostat probe -12 12 °C 0
P2P
Evaporator probe
presence
Serves to set the evaporator probe:
n= not present
Y= present.
n
OE Evaporator probe
calibration
Serves to calibrate the evaporator probe -12 12 °C 0
Table 4 C
ONTROL PARAMETERS

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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.8.2 Display
7.8.3 Defrost parameters (function not active)
OdS Power on outputs
activation delay
At the time of power-on activation of all loads is inhibited for
the time set 0255min0
AC Anti-hunting
delay
Minimum interval between compressor stop and successive
start 050min6
CCt Continuous cycle
duration
To set the continuous cycle duration, to be used for example
when filling the cold store with new products. 024h°C0
CCS Continuous cycle
set-point This set-point is used during the continuous cycle -50 150 °C -5
COn
Compressor On
time with faulty
probe
Time for which the compressor continues to run in the
presence of a probe fault
COn=0 the compressor always remains stopped (*)
(*) If COn=0 and “COF”=0 the compressor is stopped
0255min0
COF
Compressor Off
time with faulty
probe
Time for which the compressor remains stopped in the
presence of a probe fault
COF=0 the compressor is always on
0255°C0
Parameter Description Min. Max. U.M. Factory
settings
CF
Temperature unit
of measurement
Serves to set the unit of measurement.
If the unit of measurement is changed the following
parameters must be reset: Hy, LS,US, Ot, ALU, ALL
°C÷°F °C
rES
Resolution Allows the decimal point to be displayed
in=1°C
dE=0,1°C
dE
Lod Display
Select the probe to be displayed
P1= thermostat probe
P2= evaporator probe
P3= probe (P3 not active)
P4= probe (P4 not active)
Set= set-point
dtr= display percentage
P1
dLy Temperature
display time lag
As the temperature rises the displayed value increases by 1
degree Celsius or Fahrenheit every dLy minutes. 020.0min0
Parameter Description Min. Max. U.M. Factory
settings
tdF
Type of
defrosting
Serves to choose the type of defrosting
El= heater
in= hot gas
El
dtE Defrost End
Temperature
Establishes the evaporator temperature that determines the end
of the defrost cycle. -50 50 °C 8
ldF Defrost cycles
interval
Establishes the interval between the start of two defrost cycles 0120h 6
MdF
Defrost duration Establishes maximum defrost duration
• P2P= n no evaporator probe (time controlled
defrosting) establishes the defrost duration
time
• P2P= y (defrost end at temperature) becomes
the maximum defrost duration
(*) 0 inhibit defrost cycle
0255min0
dSd Defrost start
delay
Serves to diversify defrost starts avoiding system overloads 059min0
Parameter Description Min. Max. U.M. Factory
settings
Table 4 C
ONTROL PARAMETERS

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.8.4 Fans
7.8.5 Parameters relative to alarms management
dFd
Temperature
displayed during
defrosting phase
Serves to set temperature display
• rt= real temperature
• it= defrost start temperature
• set= set-point
• dEF= message “dEF”
dEF
dAd
Max display
delay after
defrost
Establishes the maximum time interval between the defrost
end and the restoration of the cold store temperature display 0 120 min 30
Fdt Drip time Time interval between defrost end temperature and the start of
normal operation. 0 120 min 2
dPO
First defrost after
start
Establishes the defrost function start mode
• y= immediate
• n= after time interval ldF
n
dAF Delay on defrost
after freezing
Time interval between freezing procedure end and the next
associated defrost cycle 023h
50min min 0
Parameter Description Min. Max. U.M. Factory
settings
FnC
Fans operating
mode.
Serves to set the fans operating mode.
• C-n= in parallel with the compressor; off in
defrost phase
• o-n= continuous, off in defrost phase
• C-Y= in parallel with compressor; on in
defrost phase
• o-Y= continuous, on in defrost phase
C-n
Fnd Start delay after
defrost
Time interval between defrost end and fans start. 0 255 min 0
Fct
Temperature
differential
If the temperature difference between the evaporator probe
and the cold store probe is higher than the value set in Fct, the
fans always run
059 0
FSt Fans stop
temperature
If temperature detected by the evaporator probe is higher than
“FSt” the fans are stopped -50 50 °C 0
Fon
Fans start time
with compressor
off
With the compressor off, if the temperature conditions are
present, the fans are activated cyclically according to the times
set in Fon and FoF. With Fon= 0 and FoF
N 0 the fans are
always off, with Fon= 0 and FoF= 0 the fans are always off.
015min0
FoF
Fan stop time
with compressor
off
With the compressor off, if the temperature conditions are
present, the fans are activated cyclically according to the times
set in Fon and FoF. With FoF= 0 and Fon
N 0 the fans are
always on, with Fon= 0 and FoF= 0 the fans are always off.
015min0
Parameter Description Min. Max. U.M. Factory
settings
ALC
Temperature
alarms
configuration
Serves set temperature alarms on the basis of:
• Ab= absolute temperature (in relation to
parameters ALL and ALU)
• rE= relative to the SET (in relation to
“SET+ALU” or “SET-ALL” value settings)
Ab
ALU High temperature
alarm
When this temperature is reached the alarm is signalled ALL 110 °C 40
ALL Low temperature
alarm
When this temperature is reached the alarm is signalled -50,0 ALU °C 3
Table 5 P
ARAMETERS RELATIVE TO ALARMS MANAGEMENT
Parameter Description Min. Max. U.M. Factory
settings

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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.9 Digital input alarms
ALd Temperature
alarm delay
Time interval between detection of a temperature alarm and
relative signalling 0 255 min 0
dAO
Temperature
alarm inhibit at
start-up
At start-up of the unit the temperature alarm is inhibited for the
time set in this parameter 0 23,5 h 10
min 0
tbA Alarm relay
deactivation
n= relay active for the entire duration of the alarm
y= the relay is deactivated by pressing with an alarm in
progress
n
AoP
Polarity according
to relay
(oA3=ALr)
Selects alarm relay open or closed during an alarm. cl=
terminals 1-2 closed during an alarm; op= terminals 1-2 open
during an alarm
oP
Parameter Description Min. Max. U.M. Factory
settings
i1P
Digital input
polarity
Serves to set alarm signalling on the basis of:
• oP= input is activated by contact opening
• CL= digital input is activated by contact
closing
oP
i1F
Digital input
configuration
Serves to set alarm signalling on the basis of:
• EAL= external alarm (EA on display)
• bAL= critical alarm
• PAL= pressure switch alarm
• dor= door microswitch
• dEF= defrost activation
• AUS= not enabled
• Htr= reverse action (hot-cold)
• FAN= not enabled
• ES= not enabled
• OFb= not enabled
bAL
did
Digital input
alarm delay
Serves to set the time lag before activation of the digital input
alarm
• i1F=EAL or bAL delay between detection and
signalling of an external alarm
• i1F=dor delay on door open alarm signal
• i1F=PAL time for pressure switch operation: if
nPS activations in time did are reached
restarting is manual only by powering off the
unit and then powering it on again
0 255 min. 0
nPS
Number of
pressure switch
activations
At each activation of the digital input the control is blocked; if
nPS activations are reached in time did restarting is manual
only by powering off the unit and then powering it on again.
115 15
odc
Door open control Determines compressor and fan status with door open
• no= fans and compressor operate normally
•Fan=fansOFF
• CPr= compressor OFF
• F-C= compressor and fans OFF
F-C
Parameter Description Min. Max. U.M. Factory
settings
Table 5 P
ARAMETERS RELATIVE TO ALARMS MANAGEMENT

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MAINTENANCE AND OPERATING MANUAL
The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
7.10 Other parameters
7.11 “i1F” parameter digital input
Parameter “i1F” relative to the digital input offers several possible configurations
Parameter Description Min. Max. U.M. Factory
settings
Adr Serial address Serial address 0 244 1
Pbc
Probe type
selection
Serves to select the type of probe present on the unit
• Ptc= Ptc probe
• ntc= ntc probe
ntc
dP1 Thermostat
temperature probe
Displays thermostat probe temperature.
dP2 Evaporator
temperature probe
Displays evaporator probe temperature. noP
onF
Keypad control Serves to enable or disable the ON/Off function from the
keypad
• n= On/Off not active
• y= On/Off active
y
Ptb Parameters table Serves to identify the map of set parameters 1
rEL Software release Specifies the controller version 7.4
Parameter Description
i1F=dor
Door microswitch Signals that the cold store door has been opened. When the door is opened the
compressor and fans are controlled on the basis of the value of parameter “odc” (see 7.8.5
“Parameters relative to alarms management” ).
After the time set for parameter “did” a door open alarm is generated and the message
“dA” is shown on the display. The alarm terminates automatically as soon as the digital
input is deactivated. Temperature alarms are inhibited when the door is open.
i1F=EAL
External alarm An alarm is generated after the delay set by parameter “did” from activation of the input
an alarm is generated; the message “EA” is displayed and the status of the outputs is not
changed. The alarm switches off automatically as soon as the digital input is deactivated.
i1F=bAL
High pressure switch
alarm (HP)
After a delay set by parameter “did” from activation of the input an shut-down alarm is
generated; the message “CA” is displayed and the control relay outputs are deactivated.
The alarm switches off automatically as soon as the digital input is deactivated.
i1F=PAL
Pressure switch trip If, in the time interval established by the “did” parameter a number of pressure switch
trips is reached equivalent to the number set in parameter “nPS”, the alarm will be
triggered.
The message “CA” is displayed, the compressor is stopped and control suspended.
To resume normal operation switch off the instrument and then switch it on again. When
the input is active the compressor is always stopped.
i1F=dEF Defrost cycle start Function not present
i1F=AUS - Function not present
i1F=FAN - Function not present
i1F=Htr Action reversal Cold- Hot Function not present
i1F=ES Energy Saving function Function not present
i1P=CL Digital input polarity
The polarity of the digital input depends on parameter i1P
I1P=CL: active with closed contact
I1P=oP: active with open contact

TAEevo M05-M10
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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
C HAPTER 8
H IGH PRESSURE SWITCH (HP)
TAEevo M05 - M10 models are furnished with a high pressure switch (HP).
It monitors the discharge pressure of the refrigerant compressor and prevents it from increasing to dangerous levels for the
compressor and people within the immediate vicinity.
It is of “manual reset” type. It opens the power circuit of the compressor and of the fan (see wiring diagram). When the
discharge pressure of the refrigerant compressor decreases and falls below the reset point, it resets. Therefore it is necessary to
manually restart it to start the unit (press the reset button on the top part of the cover B).
The setting values are fixed.
In the event of replacement, the pressure switch is screwed to a SCHRAEDER valve which prevents the refrigerant from
leaking.
The TRIP and RESET values of the pressure switch are indicated in the following table:
C HAPTER 9
O PERATION AND MAINTENANCE
9.1 Operation
The machine operates in completely automatic mode.
There is no need to turn it off when there is no thermal load as it turns off automatically when the preset water temperature has been reached.
9.2 Maintenance
ATTENTION
Before proceeding with the maintenance of these units be sure that all personnel concerned have read and understood the “Safety” section of
this manual.
9.2.1 Unit access
To access the components of the refrigerant circuit, remove the front panel “A” and then the unit cover “B”. After removing the front panel “A”
it is possible to access also the electrical panel. To access the pump and part of the hydraulic circuit, remove the lower side panel “C” of the unit.
Pressure switch Refrigerant TRIP RESET
bar °C °F bar °C °F
HP R407C 27.5 63.9 147 19.2 48.9 120
Table 6 S
ETTING OF HP PRESSURE SWITCH
.
B
B
A
A
B
C
C