Carrier 30PA 90 Manual

INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
Translation of the original document 80057, 09.2018
Ductable air-cooled scroll chillers
30PA 90-180
Nominal cooling capacity 17 - 36 kW

2
CONTENTS
1 - INTRODUCTION............................................................................................................................................................................3
2 - SAFETY ADVISE...........................................................................................................................................................................3
3 - OPERATION LIMITS....................................................................................................................................................................4
4 - AVAILABLE CONFIGURATIONS..................................................................................................................................................4
5 - UNIT IDENTIFICATION .................................................................................................................................................................5
6 - TRANSPORT AND HANDLING ....................................................................................................................................................5
Transport ...................................................................................................................................................................................... 5
Discharging of the unit..................................................................................................................................................................5
Placement on site ......................................................................................................................................................................... 6
7 - LOCATION AND ASSEMBLING ...................................................................................................................................................6
Location designation..................................................................................................................................................................... 6
Centre of gravity coordinates........................................................................................................................................................6
Minimum free space for commissioning and maintenance operations.........................................................................................6
Anchorage for silent-blocks ..........................................................................................................................................................7
Sound level................................................................................................................................................................................... 7
8 - CHECKING BEFORE COMMISSIONING.................................................................................................................................. 8
Electrical connections................................................................................................................................................................... 8
Checks in the centrifugal fan: STD version...................................................................................................................................9
Checks on the plug-fan: HEE version...........................................................................................................................................9
Air ducts connections..................................................................................................................................................................10
Hydraulic connections................................................................................................................................................................. 11
Condensate drain connection.....................................................................................................................................................14
9 - OPTIONS .....................................................................................................................................................................................14
Condensation pressure control...................................................................................................................................................14
Air filter........................................................................................................................................................................................ 15
Cooling recovery circuit ..............................................................................................................................................................15
10 - SAFETY ELEMENTS.................................................................................................................................................................17
Location of the control and safety elements ............................................................................................................................... 17
11 - COMMISSIONING....................................................................................................................................................................18
Checks prior to commissioning...................................................................................................................................................18
Possible problems at commissioning..........................................................................................................................................19
Operational checks..................................................................................................................................................................... 20
12 - MAINTENANCE .......................................................................................................................................................................20
13 - CONTROL AND ANALYSIS OF BREAKDOWNS.................................................................................................................23
14. FINAL SHUTDOWN ....................................................................................................................................................................24
Shutting down............................................................................................................................................................................. 24
Recommendations for disassembly............................................................................................................................................24
Fluids to be recovered for treatment...........................................................................................................................................24
Materials to be recovered for recycling.......................................................................................................................................24
Waste electrical and electronic equipment (WEEE) ................................................................................................................... 24
ANNEX I: QUICK OVERVIEW OF THE INSTALLATION.................................................................................................................25

3
1 - INTRODUCTION
The 30PA cooling only are compact outdoor air/water units.
Available in two versions:
• STD (Standard)
• HEE (High Energy Efficiency)
These units have been made for operation indoor, o󰀨ers an optimal
solution for all process cooling applications.
They are equipped with centrifugal fan (STD version) or
electronic plug-fan (HEE version), plate exchanger, hermetic
scroll compressor, and electronic control with microprocessor,
components optimised for the R-410A refrigerant.
The entire range also has the option to include a desuperheater
circuit that allows for the production of hot water at a temperature
greater than in the condensation circuits.
After manufacturing, all units are charged with refrigerant
and are tested at the factory, verifying the correct operation
of all their components within the operating range for which
they are intended.
■The units comply with European Directives:
- Machinery Directive 2006/42/EC (MD)
- Electromagnetic Compatibility Directive 2014/30/EU (EMC)
- Low Voltage Directive 2014/35/EU (LVD)
- Pressure Equipment Directive 2014/68/EU (Category 2)
(PED)
- RoHS Directive 2011/65/EU (RoHS)
- Eco-design Directive 2009/125/EC (ECO-DESIGN)
- Energy Labelling Directive 2017/1369/EU (ECO-
LABELLING)
- Harmonised Standard: EN 378-2:2012 (Refrigerating systems
and heat pumps - Safety and environmental requirements).
Technicians who install, commission, operate and service the unit
must possess the necessary training and certifications, understand
the instructions given in this manual and be familiar with the
specific technical characteristics of the installation site.
2 - SAFETY ADVISE
To avoid any risk of accident during installation, commissioning
or maintenance, it is obligatory to take into consideration the
following specifications for the units: refrigerated circuits under
pressure, refrigerant presence, electrical voltage presence and
implantation place.
Because of all of this, only qualified and experienced personnel
can perform maintenance tasks or unit repairs.
It is required to follow the recommendations and
instructions in this brochure, the labels, and the specific
instructions.
Compliance with the norms and regulations in e󰀨ect is
mandatory. It is recommended to consult the competent
authorities regarding the applicable regulations for
users of units or components under pressure. The
characteristics of these units or components are included
on the plates of characteristics or in the regulatory
documentation provided with the product.
In case of a leak:
■Toxicity: According to EN 378-1, R-410A belongs to the A1/
A1 group, i.e. with high safety both in the mix and also in the
case of a leak.
■Although it is not toxic, in case of a leak to atmospheric pressure
the liquid phase evaporates. The resulting vapours are still
hazardous because they are heavier than air and can force
the latter out of the machine rooms. If refrigerant is accidentally
released, ventilate the room with fans.
■Although it is not flammable, keep them away from open
flames (e.g. cigarettes) as temperatures of over 300°C cause
their vapours to break down and form phosgene, hydrogen
fluoride, hydrogen chloride and other toxic compounds. These
compounds may produce severe physiological consequences
if accidentally inhaled or swallowed.
■To detect leaks, an electronic leak detector, an ultraviolet lamp
or soapy water must be used . Flame detectors do not help.
■Immediately repair any refrigerant leak, using a recovery unit
specific for R-410A that avoids a possible mixture of refrigerants
and/or oils.
The compressor and line surfaces can reach temperatures
above 100ºC causing burns to the body. In the same
fashion, under certain conditions these surfaces can
reach very cold temperatures that can cause freezing
risks.
During any handling, maintenance or service operations,
the technicians involved must be equipped with safety
gloves, glasses, shoes, insulating clothing, etc
Caution: Before intervening in the unit, verify that the
main power to the unit is cut o󰀨. An electric shock can
cause personal damage. The main disconnect switch is
located in the unit’s electrical cabinet.
Components of the R-410A R-32 R-125
Chemical formula CH2F2 CHF2CF3
Weight ratio 50% 50%
Unitary global warming potential (GWP) 675 3.500
Global warming potential (GWP) 2.088
Ensure that refrigerant is never released to the atmosphere when
the equipment is installed, maintained or sent for disposal.
It is prohibited to deliberately release refrigerant into the
atmosphere. The operator must ensure that any refrigerant
recovered is recycled, regenerated or destroyed.
The operator is bound by the obligation to perform periodical
sealing tests on the refrigerating circuit according to the regulation
(EU) No.517/2014. Please, consult the frequency of tests in
chapter of “Maintenance”.
Refrigerant
Important: These units contain R-410A, a fluorinated greenhouse
gas covered by the Kyoto protocol.
All interventions on the refrigerating circuit must be performed in
accordance with applicable legislation. Within the European Union,
it is necessary to observe regulation (EU) No.517/2014, known as
F-Gas, over Certain greenhouse effect fluoride gases.

4
4 - AVAILABLE CONFIGURATIONS
According to the air supply:
■Assembly M00
HORIZONTAL air supply.
■Assembly M01
VERTICAL air supply.
According to the type of supply fan:
■STD version (Standard):
Centrifugal fan coupling by pulleys and belts.
■HEE version (High Energy Efficiency):
Variable speed electronic plug-fan.
M00
M01
STD
HEE
3 - OPERATION LIMITS
With control of the condensation pressure operating up to -15ºC.
Minimum outlet temperature. With the option of glycol water for
lower temperature operation from 5ºC to -7ºC.
Series
Cooling mode
Air Water (outlet T.)
Max. Min. Max. Min.
30PA 46ºC 12ºC 18ºC 5ºC 
+18+5
0-7
-15
+46
+12
Outdoor temperature °C DB
Mandatory glycol
Outlet water temp. in the evaporator °C
Condensation
pressure control

5
6 - TRANSPORT AND HANDLING
■Discharge via forklift truck:
The unit is designed to be transported safely by using a forklift
truck. The forks of the forklift truck must come in on the side of
the unit, ensuring that the centre of gravity of the unit remains
within the forks, because a misbalance in the transport may
cause the unit to turn over and fall from the forklift truck.
Transport
The unit must be handled with care to avoid transport damage.
Thus we recommend:
■Do not dispose of the transport supports or the packaging
materials until the unit is in its final location.
■For transport in a container, one must be selected that has an
easy load and unload to the installation location.
Discharging of the unit
The unit can be discharged using a forklift truck or a crane with a
rocker arm and cloth slings.
Any handling of the unit by other means or by gripping points
di󰀨erent from those described here may be dangerous for both
the unit and the personnel who are carrying out the discharging
or transport work.
Always check the weight of the set and verify that the discharging
method used is approved for handling that weight.
Note: please see the weight and the gravity centre
coordinates of each model stated in the following section.
The recommended length for the forks will be bigger than the
unit width, so that the entire weight-bearing structure can be
supported on the forklift truck. This also prevents the possible
introduction of the truck’s fork into functional parts of the unit
that may cause damage to the unit.
The standards and recommendations of the forklift truck must
also be respected with regards to the maximum load, inclination
of the panel, elevation of the load for transport, and, in particular,
the maximum speed.
■Discharge via crane:
A rocker arm, as well as approved cloth slings, both suitable for
the dimensions and weight of the unit, must be used in order
to carry out the work safely and without causing damage to the
units or to workers.
These slings will be hooked to the two mounting holes located
on each crossbar. Make sure that the unit is protected from
contact with the hooks to prevent damage to the housing.
The unit must be lifted and fixed with care, with
maximum inclination of 15º, since it could harm its
operation. Do not raise by points outside of those
specified here.
5 - UNIT IDENTIFICATION
Important: The serial number must be used in all
correspondence regarding the unit.
Ref\Reference No Serie\serial Nbr.Año\An.Year
Producto\Product\Produit
Ref. Produit\Item Nbr
Max.Intensidad\Intensité\CurrentKit Elec.Tension\Voltage
Refrig.KG (Fábrica\Factory\Usine)/Co2 Teq.Refrigerant
NoBoPeso\Poids\WeightPSmax(AP\HP) Temp. Max./ IPPSmax(BP\LP)
Fabricante\Fabricant\Manufacturer:
Compañía Industrial de Aplicaciones Térmicas, S.A.
P. Ind. Llanos de Jarata s/n. 14550 Montilla-SPAIN
Contient des gaz à effet de serre fluorés \ Contains fluorinated greenhouse gases regulated by the Kyoto protocol
Contiene gases fluorados de efecto invernadero regulados por el protocolo de Kyoto
CARRIER SCS
Route de Thil
01122 Montluel-FRANCE
1
16
23
4
56 7
8 9 10
11 12
13 14 15 17
Legend
1Year of manufacture
2Commercial product name
3Serial number
4Description of the product
5Purchase order number
6Sales order number
7Work order number
8Power supply
9Power output of the auxiliary electrical heaters kit (optional)
(kW)
10 Maximum absorbed current under full load (A) ( including
the electrical kit)
11 Type of refrigerant
12 Refrigerant content (kg) and Environment impact (CO2Teq.)
13 Maximum service pressure in the high pressure side (R-410A
= 42 bar)
14 Maximum service pressure in the low pressure side (R-410A
= 24 bar)
15 Maximum operating temperature (refer to “Operation limits”)
Maximum shipment and storage temperature: +50ºC
Electrical protection rating: IP54
16 Operation weight (kg) (empty weight + fluid + refrigerant)
17 Notified Body number for surveillance of the Pressure
Equipment Directive
Markings (name plate, punch marks, labels) must remain visible.
They must not be altered, removed or modified.
Check the unit for any damage or missing components upon
delivery.
Check that the details on the label, the packing and the name
plate match the order. If equipment has been damaged, or there
is a shortfall in delivery, notify accordingly.
All units bear, legibly and indelibly, a name plate located in a prime
space, as appears in the attached image: Check that this plate
matches the correct model.

6
Centre of gravity coordinatesPlacement on site
Once the unit is discharged, it must be freed from the transport
supports so that the inserts available for the silent-blocks can be
accessed.
Each support is fixed to the crossbar using 2 M4 screws.
M4 screws for
fixing the support
Mounting
hole
Location designation
Before moving the unit, it must be checked that all panels are
fastened in place. Lift and lower with care.
When choosing the location, whatever may be the selected fashion,
the following precautions have to be taken into consideration:
■It is mandatory to comply with norm EN 378-3 on Safety and
Environmental Requirements. Part 3: “In situ” installation and
protection to people.
■The area where the unit will be located must be perfectly accessible
for cleaning and maintenance operations (check minimum free
space for maintenance). Leave enough space for air circulation
around the unit.
■Check that the unit is perfectly levelled.
■It is necessary to check that the surface of the floor or the
structure supports the weight of the unit (please, consult the
weight of the unit in the section “Anchorage for silent-blocks”).
■Foresee appropriate damping devices in all the installation so
that noise and vibration transmission is avoided (refer to the
“Anchorage for silent-blocks”).
In the event of assembling directly on silent-blocks to the
ground, it is recommended that a template of the unit’s footprint
with the anchoring points of the silent-blocks be made.
With the help of the crane or the forklift truck, the unit will be
raised to a su󰀩cient height that the silent-blocks can be screwed
into its base. The 4 silent-blocks must remain oblique and the
interiors perpendicular to the unit.
M10 metric threads have been provided for their placement in
the supports indicated in the following section “Anchorage for
silent-blocks”. A hex key 17 or Allen wrench 8 will be used for
this operation based on the
type of screw used.
This image shows how the
silent-block option that can be
supplied for this unit is fixed
to the unit.
7 - LOCATION AND ASSEMBLING
Minimum free space for commissioning and
maintenance operations
1m 1m
0,5m A
30PA
A (m)
90STD to 100STD 1,2
120STD to 180STD 1,5
30PA
A (m)
90HEE 1,2
100HEE to 120HEE 1,5
160HEE to 180HEE 1,2
30PA
Centre of gravity
(mm) Weight
empty
(kg)
XYZ
90STD 453 384 528 302
100STD 488 398 576 310
120STD 625 399 676 372
160STD 619 400 666 390
180STD 625 397 674 388
90HEE 502 422 614 294
100HEE 569 417 673 351
120HEE 628 426 742 368
160HEE 940 435 573 450
180HEE 936 434 579 455
Since it is an unit designed to work indoors, some specific
installation norms must be followed:
■Ensure that the location of the supply and return grilles does
not generate air recirculation.
■Check that there are no obstructions in the air supply and return
grille slats due to being tightly closed
6 - TRANSPORT AND HANDLING

7
Anchorage for silent-blocks
Note: all the anchorings are bolt and nut type.
30PA
Distances (mm) Reactions in the supports (kg)
ABC
Weight in
service R1 R2 R3 R4
90STD 896 760 65 306 66 101 87 52
100STD 896 760 65 315 69 93 84 60
120STD 1166 760 65 379 89 112 101 77
160STD 1166 760 65 397 92 119 107 79
180STD 1166 760 65 396 93 119 105 79
90HEE 896 760 65 298 64 100 85 50
100HEE 1166 760 65 358 63 127 116 52
120HEE 1166 760 65 376 88 112 100 77
160HEE 1892 760 65 465 69 177 163 56
180HEE 1892 760 65 468 71 178 163 56
Sound level
These units have been designed to operate with a low sound level.
In any case, in the design of the installation, it must be taken into
consideration: the outdoor environment for the acoustic radiation,
the type of building for the noise transmitted in the air and the solid
elements for the vibration transmission.
To reduce the transmissions through solid matter to the maximum,
we recommend installing damping devices between the floor or
structure and the frame of the unit and flexible connections in the
hydraulic tubes.
If necessary, an acoustic technician must commission a study.
Sound pressure level
Measurement conditions: in a clear field, measured at a distance
of 10 metres, directivity 2 and at 1,5 metres from the ground.
Note: The sound pressure level depends on the installation
conditions and, as such, is only indicated as a guide. Values
obtained according to standard ISO 3744.
Radiated sound power level
Measurement conditions: ducted discharge and return. For nominal
operating conditions EN 14511 – Acoustic power reference: 10E-12
W, tolerance of ±2 dB (partial charge of ±4 dB).
Note: The unit has acoustic insulating cover for compressor (Low
Noise version).
30PA STD version
90STD 100STD 120STD 160STD 180STD
63 Hz dB(lin) 73,8 74,2 74,4 74,4 74,4
125 Hz dB(lin) 73,2 73,6 73,8 73,8 73,8
250 Hz dB(lin) 70,2 70,6 70,8 70,8 70,8
500 Hz dB(lin) 65,3 65,7 65,9 65,9 65,9
1000 Hz dB(lin) 63,0 63,4 63,6 63,6 63,6
2000 Hz dB(lin) 62,2 62,6 62,8 62,8 62,8
4000 Hz dB(lin) 58,2 58,6 58,8 58,8 58,8
8000 Hz dB(lin) 49,3 49,7 49,9 49,9 49,9
Total dB(A) 69,4 69,8 70,0 70,0 70,0
30PA HEE version
90HEE 100HEE 120HEE 160HEE 180HEE
63 Hz dB(lin) 71,1 73 73,1 73,1 73,1
125 Hz dB(lin) 70,9 72,8 72,9 72,9 72,9
250 Hz dB(lin) 67,5 69,4 69,5 69,5 69,5
500 Hz dB(lin) 65,4 67,3 67,4 67,4 67,4
1000 Hz dB(lin) 62,4 64,3 64,4 64,4 64,4
2000 Hz dB(lin) 59,5 61,3 61,5 61,5 61,4
4000 Hz dB(lin) 56,5 58,4 58,5 58,5 58,5
8000 Hz dB(lin) 49,4 51,3 51,4 51,4 51,4
Total dB(A) 68,0 69,9 70,0 70,0 70,0
30PA STD version
90STD 100STD 120STD 160STD 180STD
Total dB(A) 38,0 38,4 38,4 38,4 38,4
30PA HEE version
90HEE 100HEE 120HEE 160HEE 180HEE
Total dB(A) 36,6 38,3 38,4 38,4 38,4
Ducted sound power level
Measurement conditions: ducted discharge and return. For nominal
operating conditions EN 14511 – Acoustic power reference: 10E-12
W, tolerance of ±2 dB (partial charge of ±4 dB).
30PA STD version
90STD 100STD 120STD 160STD 180STD
Total dB(A) 83,0 84,0 84,0 84,0 84,0
30PA HEE version
90HEE 100HEE 120HEE 160HEE 180HEE
Total dB(A) 82,0 84,0 84,0 84,0 84,0
7 - LOCATION AND ASSEMBLING

8
8 - CHECKING BEFORE COMMISSIONING
Electrical connections
NOTE: Under no circumstance should the unit be started without having read the brochure completely.
30PA electronic control
The 30PA control is basically comprised of a PC SMALL control
board, a pGD1 graphic terminal, a TCO user terminal (optional for
remote control) and sensors.
■Main functions:
- Permanent control and optimization of the operating
parameters
- Safety management.
- Timing of the compressor.
- Control of condensation and evaporation pressures.
- Control of outdoor electronic plug-fan (HEE version).
- Control of the circulation pump.
- Regulation of the water outlet temperature.
- Compensation of the setpoint based on the outdoor
temperature.
- Timer and weekly programming.
- Failure diagnosis and main alarm.
■pGD1 terminal:
This graphic terminal, installed on the electric panel of the
machine, allows:
- The initial programming of the unit
- Modification of operating parameters.
- Unit ON / OFF.
- Selection of the operating mode.
- Setting of setpoints.
- On-screen display of controlled variables and sensor values
measured.
- On-screen display of active alarms and historical record of
alarms.
■TCO user terminal (optional for remote control):
The TCO user terminal, for remote control, allows:
- Modification of some operating parameters.
- Unit ON / OFF.
- Selection of the operating mode and setting of setpoints.
- On-screen display some controlled variables and probe
values.
- On-screen display of alarms codes.
Installation norms
In order to establish the unit's electric power supply (cable inlet,
calculation of the lead section, protections etc.), refer to:
■The information supplied in this document (table of technical
characteristics).
■Data plate.
■The wiring diagram and the legend supplied with the unit.
■The electronic control brochure which is supplied with the unit.
■The regulations and norms in force which regulate the
installation of air-conditioning units and electric receivers.
The electric power supply of the unit must be sized in accordance
with the maximum power input by the unit taking into account all
the options it features (if necessary, refer to the technical brochure).
Verify that electrical power corresponds to the one on the data
plate and that the voltage remains constant.
Check that the electrical connections are correct and
tight (an electrical diagram is included with each unit,
along with its legend).
Note: All connections in the site are the responsibility
of the installer. These connections are always made as
per the current regulation.
To prevent electrical shocks, make all electrical
connections before energizing the unit. Check that the
automatic switch is closed. Omitting this can cause
personal damage. Make the ground connection before
any other electrical connection.
The installer must fix line protection elements according
to the e󰀨ective legislation.
Collapsible
polycarbonate
window for
access to the
pGD1 terminal
Door
switch
Electric
panel
Options
for outlet from
the electrical
power supply

9
8 - CHECKING BEFORE COMMISSIONING
Pulleys must stay on the same planeTensor screw
Pulley
screws
Taper
pin
Pulley and belt calibration
Attention: Before performing these operations, it is necessary to
verify that the unit is disconnected from mains.
The centrifugal motorfans are coupled through pulleys and belts.
In these fans, the following must be taken into consideration:
Pulley alignment:
■The pulleys must be on the same plane, so it is important to
check them with the help of a ruler or a laser aligner.
■In case they are not aligned, remove the pulley screws, and
after removing the taper pin, the set of pulley and taper can be
slided over the axis (this action can be performed both in the
motor as well as in the fan).
Belt tension:
After fixing the pulleys on the same plane, the belt tension is made
by tightening the tensor screw.
Excessive tension on the belt can lead to premature wear on the
assembly. Insu󰀩cient belt tension can cause slippage, overheating
and premature wear of the belt.
It is essential to tension the belts using the “Deflection test”
described below:
■The belt tension must be checked and corrected using a suitable
measuring instrument (tensiometer or dynamometer)
■“Ea” calculation:
- Ea = (e x E)/100 = deformation in mm for a pulley centre
distance of 100 mm
- e = pulley centre distance in mm
- E = see table below for the value
- f = force applied
■At the centre of the centre distance “e”, apply a force “f”, as
determined in the table below, to each belt. Set the belt tension
to obtain the calculated deflection “Ea”.
Belt
type f(N) d (mm) 
E
(mm)

SPZ 25
56 71 2.45
< 71 90 2.20
< 90 125 2.05
125 1.90
Important: During commissioning, the belt tension must be
checked after 48 hours of operation.
The belt tension must be checked in all cases and before system
start-up.
  Load to be applied per belt f (N)
  Small pulley diameter (mm)
  Belt deformation for a pulley centre distance of 100 mm - E (mm)
Checks on the plug-fan: HEE version
■Before commissioning, check the blade rotation direction and
that the axis turns without strokes nor vibrations
■Once running, check the operation conditions: pressures, flows
and consumptions.
■The coupling of characteristic curves of the fan and the room
is very important, so that the flows and pressures provided to
the duct network are as required.
Checks in the centrifugal fan: STD version
■Before commissioning, check the blade rotation direction and
that the axis turns without strokes nor vibrations
■Once running, check the operation conditions: pressures, flows
and consumptions.
■The coupling of characteristic curves of the fan and the room
is very important, so that the flows and pressures provided to
the duct network are as required.

10
8 - CHECKING BEFORE COMMISSIONING
Return ducts
M00 asssembly:
Horizontal supply
M01 asssembly:
Vertical supply
HEE version Without filters (mm) With filters (mm)
CDECDE
90HEE 132 903 800 109 903 800
100HEE / 120HEE 132 1183 950 109 1183 950
160HEE / 180HEE 132 1897 800 109 1897 800
STD version Without filters (mm) With filters (mm)
CDECDE
90STD / 100STD 132 903 800 109 903 800
120STD to 180STD 132 1183 950 109 1183 950
Air ducts connections
For units designed for installation indoors with ducted supply and
return in the outdoor circuit, it is advisable to have the following
recommendations:
■Curves in the fan discharge supply must be avoided. It is
recommendable to have a straight section of duct measuring
approximately 1 metre. If it is not possible, they must be as
smooth as possible, using indoor deflectors when the duct is
of large dimensions.
■When making the ducts, direction sharp changes must be
avoided since they can generate occasional pressure drops,
which a󰀨ect the available pressure and the flow. The location
of discharge and aspiration grilles must be studied carefully to
avoid the air recirculation and the transmission and generation
of noises to the interior.
■No matter the type of ducts type to use, these must be insulated
and must not be composed of materials that propagate fire nor
expel toxic gases in the event of a fire. The internal surfaces
must be smooth and should not pollute the air that circulates
within them. In any case, the e󰀨ective legislation about this
issue must be respected.
■Flexible connections must be made between the ducts and the
unit that avoid the noise and vibration transmission.
Flexible connections
Optionally, these units can be sent with flexible connections for
supply and return air.
In case of asking together for flexible connections and damper
for condensation pressure control (optional for version STD),
discharge flexible ducts are attached to the above mentioned
damper.
If it is removed the damper for installation on duct, it is necessary
to maintain the frame for reconnecting the flexible connections.
Supply ducts
STD version
Without damper 
M00 dimensions (mm) M01 dimensions (mm)
ABCABC
90STD / 100STD 859 407 132 552 430 152
120STD to 180STD 1139 481 132 652 552 152
HEE version M00 dimensions (mm) M01 dimensions (mm)
ABCABC
90HEE 859 407 132 633 589 132
100HEE / 120HEE 1139 481 132 817 639 132
160HEE / 180HEE 1854 407 132 1619 590 132
STD version
With damper 
M00 dimensions (mm) M01 dimensions (mm)
ABCABC
90STD / 100STD 859 407 132 513 391 132
120STD to 180STD 1139 481 132 613 513 132
 Damper for condensation pressure control (optional): add the
height of the damper to the flexible duct.

11
8 - CHECKING BEFORE COMMISSIONING
Where:
Vinst Installation volume (l)
Vinst Expansion vessel volume (l)
V1Initial volume of 1kg of water (at water temperature with the machine stopped)
V2Final volume of 1kg of water (at water temp. with the machine at normal speed)
PfFinal network pressure (safety valve pressure in bars + 1)
PiInitial network pressure (absolute filling pressure of the installation in bars)
Note: If the hydraulic circuit has a bu󰀨er tank, its volume must be
taken into account for this calculation.
Volume occupied by 1kg of water at different temperatures:
Maximum installation volume
The water capacity for the installation obtained from this equation
corresponds to the maximum that the installation allows based on
the expansion vessel assembled.
Temperature (ºC) Volume (l) Temperature (ºC) Volume (l)
0 1,00013 50 1,0121
4 1,00000 60 1,0171
10 1,00027 70 1,0227
20 1,00177 80 1,0290
30 1,00435 90 1,0359
40 1,00782 100 1,0434
f
ifvessel
INST PVV
PPV
V
⋅−
−
⋅
)(
)(
12
=
The calculation of the minimum water volume has been done for
nominal conditions of water inlet/outlet temperature 12°C/7°C and
outdoor air temperature 35ºC, only in COOLING mode. This value
is applicable for the majority of refrigeration applications (group
with fan-coil units).
Note: The bu󰀨er tank is indispensable in installations that operate
with a reduced volume of water (group with an air handling unit)
or for industrial processes.
30PA
Minimum
volume (I)
Minimum
flow (m3/h)
Maximum
flow (m3/h)
90STD 101 2,2 6,2
100STD 120 2,7 7,4
120STD 143 3,1 8,8
160STD 187 4,1 11,3
180STD 204 4,3 12,7
90HEE 107 2,1 6,7
100HEE 132 2,9 8,1
120HEE 152 3,3 9,5
160HEE 189 3,7 11,7
180HEE 210 4,0 12,8
Anti-freeze protection with glycol water
If a pure product is used for dilution in order to protect the hydraulic
circuit, the following instructions must be followed:
■Do not introduce any of the pure anti-freezing product separately
and then the water in the installation.
■Always prepare the water mixture + anti-freeze + corrosion
inhibitor at the correct dosage prior to introducing it into the
installation.
Minimum installation volume
The electronic control for these units incorporates an auto-adaptive
control for the compressor operating time based on the time set
for anti-short-cycle.
This control reduces the number of times the compressor is started
up and permanently adjusts the system’s thermal inertia, favouring
the reduction of the minimum volume of water in the installation.
The size of the bu󰀨er tank can also be decreased since the unit
will be stopped for less time.
Installation water volume
Hydraulic connections
Evaporator operating limits
The curves represent the minimum and maximum admissible
temperature increases based on the outlet (discharge)
temperature, for both pure water and glycol water.
For temperature changes that are not listed between the curves,
please consult.
The minimum outlet temperature for the unit will be +5ºC with pure
water and -7ºC with glycol water.
•Example
For an outlet water temperature of +5ºC:
Minimum temp.: 2,6ºC T. condition 7,6ºC / 5ºC
Maximum temp.: 6,0ºC T. condition 11ºC / 5ºC
Procedure:
■At minimum, a complete rinsing of the hydraulic installation
must be performed.
■After the final rinsing, the installation must be completely
drained.
■Introduce the water/anti-freeze/inhibitor mixture and increase
the pressure with a hydraulic pump.
We recommend using a filling device with a non-return valve
for compliance with the domestic anti-contamination standards.
The device must never in any case be connected to the
city network if the additives used in the hydraulic circuit are
not approved by the Ministry of Sanitation in the country of
installation.
■Completely purge the installation.
■Circulate the mixture throughout the entire installation for a
minimum of 2 hours prior to starting up the unit.
■Check the final dosage obtained with a densimeter or
refractometer.
■Check the pH obtained with pH paper strips or a pH metre.
■Place a label in a visible place that indicates:
- the presence of anti-freeze in the installation,
- the name of the product and the supplier,
- the dosage and the pH as of the time the unit is started up.
9
8
7
6
5
4
3
2
1
10
-7 -6 -4 -2 0 2 4 6 8 10 12 14 16 18
Water outlet temperature °C
ΔT Admissible difference between water I/O °C
maximum ΔT
minimum ΔT

12
8 - CHECKING BEFORE COMMISSIONING
Warning: the glycol concentration must keep the fluid at least 6°C
below the outlet water temperature foreseen in the evaporator in
order to allow a correct adjustment of the evaporator’s minimum
pressure regulation. If the concentration is below the necessary
amount, there is a risk of freezing. On the other hand, any excess
of concentration entails a decrease in performance.
Minimum usage temperature:
- Mono-propylene glycol
- Mono-ethylene glycol
* Max. 60ºC
+ Good resistance under normal conditions.
0 There may be corrosion problems, especially if other factors
intervene.
- Not advisable.
Note: For open-circuit installations, if it is not possible to
maintain the water conditions within the values indicated
in the previous table, it will be necessary to install an
exchanger that separates the unit’s circuit from the water
circuit to be treated by using materials compatible with
these characteristics, whether stainless steel or titanium.
Minimum freezing and usage temperature graphs
Freezing temperature:
- Mono-propylene glycol
- Mono-ethylene glycol
Concentration % 0 10 20 30 40 50
Mono-ethylene glycol (MEG) ºC 0 -3 -7 -13 -20 -29
Mono-propylene glycol (MPEG) ºC 0 -2 -5 -10 -15 -21
Required glycol concentration
Important: The values are o󰀨ered as a guide according to the
standard characteristics of the MEG. These may vary based on
the MEG manufacturer, which is why it is necessary to consult
the manufacturer data in order to guarantee protection up to the
desired temperature.
Corrosion behaviour
Water content Concentration (mg/l) AISI 316 Copper
Organic substances + 0
Electrical
conductivity
< 500 S/cm + +
> 500 S/cm + -
NH3
< 2 + +
2 - 20 + 0
> 20 + -
Chlorides *
< 300 + +
> 300 0 +
Sulphites, chloride-free
< 5 0 +
> 5 0/- 0
Iron in solution
< 10 + +
> 10 + 0
Free carbonic
acid
< 20 + 0
20 - 50 + -
50 + -
Manganese in
solution
< 1 + +
> 1 + 0
pH value
< 6 0 +
6 - 9 0/+ +
> 9 + 0
Oxygen
< 2 + +
> 2 + +
Sulphates
< 70 + +
70 - 300 + 0
> 300 - -
The units’ hydraulic circuits are made of copper pipes. The
exchanger plates are made of AISI-316 stainless steel, and the
material used for soldering the plates is copper.
The following table indicates corrosion behaviour for copper and
the AISI-316 stainless steel with regard to water with di󰀨erent
compositions. Values outside these ranges can cause corrosion
problems in the hydraulic circuit and in particular in the plate
exchangers.
It is recommended that the water filling the hydraulic circuits be
filtered and treated, if necessary.
Installation hydraulic diagram
The design of the hydraulic circuit must observe the operating
conditions (flows - pressure drops).
■The direction of water circulation must be observed as indicated
on the stickers on the unit.
If more amount is needed, it must be exactly the same mixture
as the product initially used.
The following table and curves feature the minimum glycol
percentages required for the installation in accordance with the
freezing point.
30PA Ø hydraulic connections
90V-STD to 100V-STD
90V-HEE to 100V-HEE 1 1/4” M
120V-STD to 180V-STD
120V-HEE to 180V-HEE 1 1/2” M
■The diameters of the unit hydraulic connections can be
consulted in the following table:
-25
-30
-15
-20
-5
-10
0
20 40 5010 30
-45
-35
-40
0
3
4
1
2
Temperature °C
Volume concentration %

13
8 - CHECKING BEFORE COMMISSIONING
■It is advisable to use flexible hoses for connecting the piping
to the unit in order to reduce the transmission of vibrations to
the building to the greatest degree. It is mandatory to assemble
hoses if the unit is installed over shock absorbers. Optionally,
a flexible hydraulic connections kit can be supplied.
■The pipe layouts must be set out with the lowest possible
number of bends to minimise pressure drops. The pipes must
be correctly supported to prevent exerting excessive force on
the unit connections.
■Before insulating the tubes and charging the system perform
a preliminary check to verify that there are no drops in the
installation.
■The pipes must be carefully insulated to prevent leaks and
condensation. Ensure that the material used is steam barrier
type. Otherwise, cover the insulation using appropriate
protection.
■The water must be analysed and the circuit must be set out
according to the results. If necessary, an expert in water
treatment must be consulted (see section on corrosion
behaviour).
■In installations to open circuits, if it is not possible to
maintain the water conditions within the values indicated in
the corrosion behaviour table featured, it will be necessary
to install an exchanger that separates the unit circuit from
the circuit of the water circuit to be dealt with by using
materials compatible with these characteristics, whether
stainless steel or titanium.
■Plan the anti-freeze protection for the installation when the
outdoor temperature is low: water with anti-freeze, thermal
insulation of the hydraulic circuit, electrical heaters in the
hydraulic circuit, draining from the installation when the unit
does not work, etc.
In this case the installer must set up the complete hydraulic
circuit with all the components: thermal bu󰀨er tank, motorised
pump group, expansion vessel, safety, regulation, cut-o󰀨and
draining valves, air bleeder valve, etc.
It is also necessary to install a filter in the hydraulic power
supply to the unit in order to prevent clogging of the plate
exchanger. Non-compliance with this recommendation
can cause reduced flow which can lead to freezing and
breaking of the exchanger.
Both at the inlet and the outlet of the unit, install thermal
pressure gauges which enable supervising the operation of the
installation, or at least plan the installation of these.
Note: optionally, a kit can be supplied with :
- A stainless steel mesh filter (500 microns).
- Cut-o󰀨and water regulation valves.
- Flexible hydraulic connections of 500 mm.
Schematic diagram of the hydraulic
circuit
DIFFERENTIAL
PRESSURE SWITCH
PLATES
EXCHARGER
SHUT-OFF
VALVE
DRAINAGE
CIRCUIT
1
2
20
25
3
4
5
6
7
8
10
9
15
2 3 10 15 20674 5 89
120STD / 160STD
90STD / 100STD
180STD
Flow (m
3
/h)
30PA pressure drop (m.w.c.)
1
2
3
4
5
6
7
8
10
9
15
20
25
2 3 10 15 20674 5 89
90HEE - 100HEE
120HEE - 160HEE - 180HEE
30PA pressure drop (m.w.c.)
Flow (m
3
/h)

14
8 - CHECKING BEFORE COMMISSIONING
Condensate drain connection
In 30PA units, the condensate drain pan includes a 3/4” M bronze,
bleeding trunk for draining condensates.
Siphon installation norms
All water drain tubes must be provided
with a siphon to avoid bad smell and
water spills.
• Pan in underpressure:
Water must be suctioned from the pan because of the
depression with respect to the motorfan assembly.
Perform the siphon assembly as per the scheme of the attached
starting diagram:
- For the correct siphon design, the “A” height must be at
least twice that of the underpressure (mm.w.c) where the
condensate pan is placed.
- Check that the condensate outlet is not clogged.
CONNECT SIPHON
METTRE SIPHON
PONER SIFON
V220014
• Pan in overpressure:
It is installed to avoid the access through the drain piping of
bad smells.
Attention: With low outdoor temperatures, the electrical heater-
based anti-freeze protection option for the pan is recommended.
Mandatory when outdoor temperatures are below 3°C.
9 - OPTIONS
ServomotorDamper
M01 assembly:
VERTICAL air supply
M00 assembly:
HORIZONTAL air supply
Servomotor
Damper
Frame
Condensation pressure control
In units with the STD version that work in cooling with an outdoor
temperature lower than 12ºC, the condensation pressure control
allowing an “all seasons” operation (up to -15ºC) is mandatory.
In units with centrifugal fan a check is performed per motorized
- The drain piping must be slightly sloped to ease circulation
towards the drain.
- The original diameter of the piping must be respected. No
reduction can be made.
- With outdoor temperatures which are lower than 0°C, the
necessary precautions must be taken to prevent the water in
the drain ducts from freezing.
damper in the fan supply. A servomotor opens or closes the
damper depending on the proportional signal 0-10V received
from the electronic control system (during the operation of the
fan).
A
Condensates pan
in depression
A
Siphon drain
Slight slope
5/1000
To drainage
Check the watertightness of the connection.

15
9 - OPTIONS
30PA Assembly No. of
dampers
Servos per
damper
Damper
width
90STD to 180STD M00 1 1 150
M01 1 1 150 (*)
(*) The damper incorporates a frame (60 mm width) to fit the
damper to the fan supply.
Filters are moved by
lifting the tab and dragging
Cooling recovery circuit
The system consists in a hot water supplying by an heat recovery
system on the compressor(s) discharge gas, on an auxiliary
desuperheater exchanger.
This optional equipment is only available on request, and factory
mounted.
Operating mode
The heat recovery is possible only if the unit is running.
The desuperheater system allows a free heating of hot water with
a reduction of the total input power of the unit.
Principle and precaution of hydraulic connection
In order to allow the unit to start up and to run under good
conditions, the circuit must be as short as possible, and the water
flow of the desuperheater must start slowly to normal operating
condition, with a water flow equal to 10% of its standard value,
and must be calculated for a hot water inlet temperature of +50°C.
Thus, it is recommended to have a hydraulic diagram making
it possible to obtain very quickly a hot water at the inlet of the
desuperheater (3 ways valve + controller + temperature sensor
on the exchanger water inlet).
The controller set point must be adjusted to +50°C minimum.
■The recovery circuit must be done in accordance with the
standards in force and plan all of the necessary elements in
a closed circuit:
- circulation pump (optionally supplied),
- expansion vessel, safety valve,
- mesh filter,
- filler,
- drainer,
- bleeders,
- thermometers,
- pressure gauges
- cut-o󰀨and insulation valves.
■The circulation pump can only work in a closed circuit. The
command is performed from a thermostat located on the unit.
■Attention: a detailed attention must carried with the selection
of the expansion tank, because the recovery water circuit can
reach the temperature of 120°C in the event of stopping of the
circulator or non hot water consumption.
■Install heating elements on all pipes that could be exposed to
freezing temperatures.
The motorized damper is supplied dismounted, together with the
machine.
In accordance with the code of practice as regards aeraulic
installation, we recommend a remote installation of the damper,
at a distance approximately equal to 3xDe (equivalent diamenter)
of the supply air duct diameter.
This stipulation is the only one allowing a best operation of the
motorized damper with a homogeneous flow of the air.
After this, it’s necessary to connect the electrical supply of the
servomotor.
Air filter
These units can include a frame with gravimetric filters in the air
return to the unit. The frame is assembled on a profile made of
moveable steel metal which can be removed.
The filters frame is removable, and upon request, it is possible to
supply the frame independently with the 30PA/PH/PAC/PHC unit,
to be joined on site.
The frame dimensions can be referred to in the technical brochure
for these units (No. 10056).
Frame width = 53 mm
PLATES
EXCHARGER
EXPANSION
VESSEL
ELECTRICAL
HEATER
MESH
FILTER
VA
SHUT-OFF
LVE
DRAINAGE
CIRCUIT
SAFETY
VALVE
NO RETURN-
VALVE
VA
AIR BLEEDER
LVE
THERMOMETER
MANOMETER
CIRCULATOR
PUMP
FILLED
CIRCUIT
3-WAY
VALVE
FLEXIBLE
CONNECTION
Municipal water
Consumption
Optional
30PA
Min. 50ºC

16
Technical characteristics of the recovery circuit
 Capacity recovered by the desuperheater circuit for nominal
conditions and recovery water at 50/60ºC.
 The change of speed of the pump is made by a button that
changes color according to the selected speed (blue: low;
green: medium; yellow: high).
30PA
HEE version
90 100 120 160 180
Recovery capacity (kW) 4,5 5,2 6,3 7,7 8,8
Nominal water flow (m3/h) 0,39 0,44 0,54 0,67 0,76
Pressure drop (m.w.c.) 0,07 0,09 0,18 0,27 0,35
Cooling capacity (kW) 18,5 21,1 25,6 31,6 35,8
Power input (kW) 6,2 7,1 7,8 10,0 11,9
Hydraulic
connections
Type Threaded
Diameter 1” M
Pump
(optional)
Type Humid rotor
Number 1
Motor output (kW) 0,05
Max. absorbed current
(A) 0,4
Avail. pressure (m.w.c.)
(max. pump speed) 5,52 5,46 5,34 5,19 5,07
Additional
weight
Recovery circuit (kg) 5,3 5,3 6,8 6,8 6,8
Pump (optional) (kg) 3,2
30PA
STD version
90 100 120 160 180
Recovery capacity (kW) 4,4 5,2 6,2 8,1 8,9
Nominal water flow (m3/h) 0,38 0,45 0,53 0,70 0,76
Pressure drop (m.w.c.) 0,06 0,09 0,17 0,30 0,36
Cooling capacity (kW) 17,8 21,3 25,3 33,0 36,2
Power input (kW) 6,8 7,9 8,6 10,8 12,7
Hydraulic
connections
Type Threaded
Diameter 1” M
Pump
(optional)
Type Humid rotor
Number 1
Motor output (kW) 0,05
Max. absorbed current
(A) 0,4
Avail. pressure (m.w.c.)
(max. pump speed) 5,54 5,45 5,35 5,15 5,07
Additional
weight
Recovery circuit (kg) 5,3 5,3 6,8 6,8 6,8
Pump (optional) (kg) 3,2
3
4
1
2
5
6
Pressure drop of the recovery circuit and pump’s
available pressure
Hydraulic connections of the recovery circuit
LEGEND
1Water inlet to the indoor circuit
2Water outlet from the indoor circuit
3Water outlet from the recovery circuit
4Water inlet to the recovery circuit
5Plate exchanger
6Circulation pump (optional)
9 - OPTIONS
1
2
3
4
21
0,6
0,7
0,8
0,9
0,3
0,4
0,5
0,05
0,1
0,2
0,2 0,5
Pressure drop in the exchanger and
pump’s available pressure (m.w.c.)
Flow (m3/h)
6
7
5
34
Pump
90STD to 100STD
90HEE to 100HEE
120STD to 180STD
120HEE to 180HEE

17
10 - SAFETY ELEMENTS
Location of the control and safety elements
30PA control
Device Adjustment Symbol
Inlet water exchanger
probe
30PA
controller
B1
Outdoor air probe B2
Oulet water exchanger
probe B3
Compressor discharge
probe B4
Refrigerant anti-freeze
probe on the exchanger B6
Outdoor coil pressure
transducer B7
Low-pressure pressostat 2 bar LP
High-pressure pressostat 42 bar HP
Connected to the compressor discharge, it will
stop its operation when the pressure at that
point reaches the setpoint. Disconnects at 42
bar and is reactivated automatically.
Connected to the compressor suction, it will
stop its operation when the pressure at that
point goes down below the tare value (caused
by obstructions in the circuit, excessive dirt in the filters, fan stop
or ice formation in the evaporator). It disconnects at 2 bar and it
is automatically reactivated.
Automatic switch in the control circuit
Magnetothermal switch that protects the operation circuit against
continuous surges as well as against high currents of short duration
(short circuits).
Magnetothermal protection switches line
They are located at the beginning of the power lines for the
compressor and motor fan to protect them.
Main door switch
High pressure pressostat
Low pressure pressostat
Water anti-freeze protection
This safety device is built into the electronic control. This is activated
in COOLING mode when the water outlet temperature is lower
than the set value. This causes the stop of the outdoor fan and
the compressor.
Note: For operation with glycol water: consult.
Water circulation control
A di󰀨erential pressure switch detains the operation of the unit when
it does not detect water circulation.
Refrigerant anti-freeze protection
This safety device is built into the units' electronic control. It is
activated when, working in COOLING mode, the indoor refrigerant
temperature is lower than the setpoint value. This causes the stop
of the outdoor fan and the compressor.
Safeties at the compressor
The scroll type compressor that these units as standard have the
following safeties:
■Non-return valve built into the compressor.
■Thermal protection in the compressor, which stops the operation
of the motor when there is excessive heating.
■Protection of the compressor discharge temperature through
a klixon.
By using a mechanical device, it impedes access to the electric
panel when the unit is with voltage.
Anti-freeze protection with heaters (optional)
Anti-freeze protection with flexible electrical heaters around the
pipe lines of the hydraulic circuit to avoid their freezing. This
optional is recommended with negative temperatures.
Air coil
Differential
pressure
switch
Drain
bleeder
Plates
exchanger
B1
B3
B6
E
S
Compr.
B7
HP LP
B2
Outdoor
air
B4 Sight glass Expansion
valve
No-return valve
Liquid receiver (heat pump)

18
■All models are equipped with
scroll type compressors and
have a phase control relay.
Verify that they turn in the
correct direction and, if not,
reverse the power wires.
COMPRESOR SCROLL.
COMPROBAR SENTIDO DE GIRO
COMPRESSEUR SCROLL.
VÉRIFIER LE SENS DE ROTATION
SCROLL COMPRESSOR.
CHECK SENSE OF ROTATION
WICHTIG: WIEDERBEHEIZUNG DER
OLWANNE
IMPORTANT: CRANKCASE HEATING
IMPORTANT: SURCHAUFFE CARTER D’HUILE
IMPORTANTE: RISCALDARE IL CARTER
DELL’OLIO
IMPORTANTE: RECALENTAMIENTO DE
ACEITE DEL CÁRTER
KOENNEN.
TO ALLOW THE COMPRESSOR(S) STARTING
AU PREMIER DÉMARRAGE OU APRÈS UNE ABSCENCE
TENSION 24 HEURES AVANT D’AUTORISER LE
DÉMARRAGE DU(DES) COMPRESSEUR(S).
AL PRIMO AVVIAMENTO U DOPO UNA INTERRUZIONE
PROLUNGATA DELLA ALIMENTAZIONE ELETTRICA,
LASCIARE LA MACCINA SOTTO TENSIONE PER 24 ORE
PRIMA DI AUTORIZZARE L’AVVIAMENTO DEL(DEI)
COMPRESSORE(I).
ANTES DEL PRIMER ARRANQUE O DESPUÉS DE UNA
AUSENCIA DE CORRIENTE POR UN LARGO PERIODO DE
TIEMPO, CONVIENE QUE LA UNIDAD ESTÉ CONECTADA
UN MÍNIMO DE 24 HORAS.
BEIDER ERSTEN INBETRIEBSETRUNZ ORDER NACH EINER
LANGEN STROMUNTER-BRECHUNG BRINGEN SIE DIE
MASCHINE UNTER SPANNUNG 24 STRUNDERLANG
BEVOR SIE DEN(DIE) KOMPRESSOR(EN) EINSCHALTEN
FOR THE FIRSTSTART OR AFTER ALONG TIME OUT OF
VOLTAGE PUT THE MACHINE ON LIVE 24 HOURS BEFORE
DE COURANT PROLONGÉE, METTRE LA MACHINE SOUS
11 - COMMISSIONING
■It is advisable to make a complete sketch of the installation
including the location of the unit and all the components used
in the hydraulic circuit (cut-o󰀨and safety valves, water filter,
circulation pump, bu󰀨er tank, etc.). It will be very useful for
maintenance and repairs in the installation (please consult
Annex I).
■Verify the absence of any leaks of the refrigerant.
■The following must be verified:
- That the electrical power supply remains constant and that it
corresponds to that featured on the unit data plate.
- That the electric installation has been carried out according
to the electric wiring diagram provided with the unit (consult
the chapter on “Checking before commissioning”).
- The correct connection of the sensors supplied with the unit.
- That they are no cables close to heat sources.
■Once the above verifications have been carried out, the control
circuit is supplied with voltage by the automatic control switch.
It is necessary to leave the compressor crankcase heater with
voltage for 24 hours before starting the compressor.
Checks prior to commissioning
Adjustment of the water flow
■The filling of the hydraulic circuit is then carried out:
- Open the water circuit valves and ensure that the water
circulates around the exchanger with the pump in service.
- Bleed the air in the hydraulic circuit.
- Verify the operation of the water circulation controller and the
cold/hot water control.
■Factory set configuration:
- Thermal jump: 5ºC
- COOLING mode operation: 12ºC / 7ºC
Operation is recommended with the emitters closed.
Note: other control values are allowed once the verified flow
and temperatures remain within the operational limits of the unit.
■The total pressure drop in the installation is not known precisely
at start-up, such that it is necessary to adjust the water flow with
the regulation valve in order to obtain the desired nominal flow.
■Thanks to the pressure drop generated in the hydraulic network,
this regulation valve allows the network’s pressure/flow curve
to be overlapped with the pump’s pressure/flow curve, thereby
obtaining the nominal flow corresponding to the desired
operating point.
■The reading of the pressure drop in the plate exchanger (which
is obtained by connecting two pressure gauges on the unit’s inlet
and outlet) will be used as a means of control and adjustment
of the nominal flow of water in the installation.
■Next the following procedure must be performed:
- Totally open up the regulation valve.
- Leave the pump running for 2 hours in order to eliminate any
possible solid particles present in the circuit.
- Read the pressure drop of the plate exchanger when starting
up the pump and 2 hours later.
- If the pressure drop has decreased, this means that the mesh
filter is obstructed; it must be disassembled and cleaned.
- Repeat until the obstruction is eliminated from the filter.
- Once the circuit is free of contaminating elements, read the
pressure drop of the plate exchanger and compare it with the
theoretical pressure drop of the selection.
If the value is greater than the theoretical value, the flow is
too high. The pump o󰀨ers too high of a flow from the point
of view of the installation’s pressure drop.
In that case, close the regulation valve one revolution and
read the new pressure drop.
Perform a successive approximation by closing the regulation
valve until the nominal flow is obtained at the desired
operating point.
On the contrary, if the network’s pressure drop is too high with
regards to the available static pressure o󰀨ered by the pump,
the resulting water flow will be reduced and the temperature
di󰀨erence between the inlet and outlet of the exchanger
will be more significant, which is why it will be necessary to
minimize the pressure drops.

19
Control of the refrigerant load
■When starting the compressor, check the subcooling and
overheating and thus verify is the refrigerant load is appropriate
to the operation conditions.
■If the refrigerant load is lower than required, the suction
pressure will be rather lower than normal, and overheating when
suctioning from the compressors will be high. This can cause
an interruption in operation due to activation of the refrigerant
load safety device.
To adjust the refrigerant load, a schrader valve is built into the
unit on the liquid line.
■Verify the absence of any leaks of the refrigerant. In the event
of a leak:
Schrader valve for
refrigerant load
11 - COMMISSIONING
- Completely empty the unit using a specific recovery unit for
R-410A and repair the leak.
- Next, reload the gas into the unit according to load data
provided in the technical characteristics table and in the
unit’s data plate.
- Add the refrigerant via the schrader valve of the liquid
line using the appropriate equipment and tools, with the
compressor stopped, monitoring the pressures to control
any anomaly.
Low-pressure schrader valve
(optional pressure gauge connection)
High-pressure schrader valve
(optional pressure gauge connection)
Electric
panel
High-pressure
pressostat
Low-pressure
pressostat
Door
switch
Revovery circuit
water inlet
Indoor circuit
water outlet
Revovery circuit
water outlet
Indoor circuit
water inlet
Possible problems at commissioning
All indications given in this brochure must be respected and
complied with to guarantee a correct operation of the units.
Next, several possible operation problems are stated which could
happen if the conditions of the commissioning are not appropriate.
■Insufficient water flow. Very high temperature differences
between water inlet into and outlet from the unit caused by:
- Insu󰀩cient air bleeding.
- Small water circulation pump or anti-clockwise rotation.
- Other situations which may prevent correct water circulation.
■Insu󰀩cient thermal charge in the installation. The limiting
operating values are quickly reached by:
- Incorrect operation of the emissions system (fan coils, air
conditioning exchangers, etc.).
■Air recirculation in the unit, originated by some obstacle in the
air aspiration or supply.

20
Operational checks
Cooling MODE
Compressor
Suction pressure bar
Suction temperature (1) ºC
Condensation pressure bar
Condensation temperature (2) ºC
Air condenser
Gas inlet temperature ºC
Liquid outlet temperature (3) ºC
Air inlet temperature ºC
Outdoor temperature ºC
Air outlet temperature ºC
Water
evaporator
Water inlet temperature ºC
Water outlet temperature ºC
Liquid inlet temperature ºC
Evaporator outlet temperature (4) ºC
Subcooling (2) - (3) ºC
Overheating (4) - (1) ºC
The recording of these parameters whilst the unit is running allows
controlling the installation performance and it is the best possible
way to avoid breakdowns since the analysis of these data makes
early detection of anomalies possible or the provision of the
necessary means available to ensure that they do not take place.
Check the unit operation by verifying the electronic control and
the safety devices.
It is also recommendable to create a report, taking note of the
date, which includes the following information:
■the nominal voltage,
■current absorbed by the compressors, fans and other electrical
components.
■significant temperatures in the cooling circuit (see attached
table),
■other aspects considered interesting such as alarms detected
by the electronic control of the unit.
11 - COMMISSIONING
Recommendations
■Do not lean on the unit. A platform must be used to work on
a level.
■Do not lean on the copper refrigerant tubes.
■Keep the unit clean.
■Keep the space surrounding the unit clean and cleared in order
to avoid accidents and ensure the proper ventilation of the coil.
■Perform a visual (remains of water or oil below or around the
unit) and auditory inspection of the entire installation.
■In general, a corrosion control must be performed on the
metallic parts of the unit (frame, bodywork, exchangers, electric
panel, etc.).
■Check that the insulation foam is not unstuck or torn.
12 - MAINTENANCE
The minimal maintenance operations and their periodicity will be
made according to the national regulations.
Any intervention on the electric cooling components must be made
by a qualified and authorized technician.
Technicians who intervene with the unit must use the necessary
safety equipment (gloves, goggles, insulating clothing, safety
shoes, etc.).
Furthermore, if working around sources of significant noise, we
recommend the use of noise-dampening headgear.
Caution: Before intervening in the unit, cut offmain
power.
Plate exchanger
■The exchangers are fitted with thermal insulation. Check that
the foam is not unstuck or broken.
■The water quality and the pressure drop must be verified at
the exchanger level. After verifying the mesh filter condition,
if necessary, the exchanger must be cleaned. To this end, a
weak solution of phosphoric acid 5% must be circulated using
the high pressure pump. During optimum cleaning, the cleaning
solution flow must, as a minimum, be 1,5 times the working
flow, preferably in the inverse circulation mode. This must be
followed by thorough rinsing with water to remove any acidic
residues. It is advisable to circulate a solution 1%-2% of sodium
hydroxide prior to the last rinsing in order to ensure that the acid
has been neutralised.
■Any repair or modification to the plate exchanger is prohibited.
It can only be replaced by an original part.
Air coil
■Check that the coil is free from dust and grease.
■Cleaning the accumulated dust on the coil can be performed
with a vacuum cleaner perpendicular to the fins or with a low-
pressure water cleaner. Grease can be removed with water with
degreaser. Do not put stress on the fins as they could deform.
■All the electric connection states must be checked as well, as
well as the air tightness of the di󰀨erent circuits.
Next, some recommendations are stated for performing the
maintenance and cleaning of the unit’s components.