Astral Pool PROHEAT II Series User manual

REFERENCES
STANDARD
CHILLER
INDOORS
PROHEAT II 35 kW ModBus
65542-MB
68245-MB
69649-MB
PROHEAT II 45 kW ModBus
65543-MB
68246-MB
69650-MB
PROHEAT II 60 kW ModBus
65544-MB
68247-MB
69651-MB
PROHEAT II 90 kW ModBus
65545-MB
68248-MB
69652-MB
PROHEAT II 120 kW ModBus
65546-MB
68249-MB
69653-MB
PROHEAT II SERIES HEAT PUMP
TECHNICAL MANUAL. START-UP AND OPERATION · MANUAL TÉCNICO. ARRANQUE Y FUNCIONAMENTO ·MANUEL
TECHNIQUE. MISE EN ROUTE ET FONCTIONNEMENT · TECHNISCHES HANDBUCH. INBETRIEBNAHME UND BETRIEBSWEISE ·
MANUALE TECNICO. AVVIAMENTO E FUNZIONAMENTO · MANUAL TÉCNICO. ARRANQUE E FUNCIONAMENTO
EDITION: 3

TABLE OF CONTENTS……………………………………………ENGLISH
1. INTRODUCTION ................................................................................................................ 7
2. SECURITY .......................................................................................................................... 8
2.1. RESPONSIBILITY OF HOLDER................................................................................ 8
2.2. REFRIGERANT CIRCUIT......................................................................................... 8
2.3. PROTECTION GEAR .............................................................................................. 9
2.4. HAZARDS............................................................................................................ 10
3. PACKAGING INSPECTION................................................................................................ 12
4. EQUIPMENT DESCRIPTION ............................................................................................. 13
4.1. COMPONENTS ................................................................................................... 13
4.2. TECHNICAL CHARACTERISTICS........................................................................... 14
4.3. ELECTRICAL CHARACTERISTICS.......................................................................... 14
4.4. ELECTRICAL DIAGRAMS ..................................................................................... 14
4.5. SIZE .................................................................................................................... 14
5. EQUIPMENT INSTALLATION ........................................................................................... 15
5.1. SAFETY INSTRUCTIONS ...................................................................................... 15
5.2. REQUIREMENTS AND PREVIOUS OPERATIONS ................................................. 15
5.3. OPERATING CONDITIONS .................................................................................. 16
5.4. CONDENSATION DRAIN ..................................................................................... 19
6. CONTROLLER .................................................................................................................. 20
6.1. MAIN FUNCTIONS.............................................................................................. 20
6.2. MAIN TECHNICAL CHARACTERISTICS. ............................................................... 21
6.3. PARAMETER SETTINGS ...................................................................................... 21
6.4. STARTING BASIC OPERATION ............................................................................ 24
6.4.1. OPERATING MODE ....................................................................................... 24
6.4.2. HEAT MODE.................................................................................................. 25
6.4.3. COOL MODE (CHILLER MODELS) .................................................................. 25
6.4.4. AUTO MODE (CHILLER MODELS).................................................................. 26
6.4.5. DEFROST FUNCTION ..................................................................................... 26
6.4.6. WATER PUMP CONTROL .............................................................................. 27
6.4.7. FAN OPERATING CONDITIONS ..................................................................... 28
6.4.8. REMOTE SWITCH.......................................................................................... 28
6.5. PROTECTION SYSTEMS ...................................................................................... 28
6.5.1. COMPRESSOR DELAY PROTECTION.............................................................. 28
6.5.2. PHASE CONTROL........................................................................................... 29
6.5.3. OVER CURRENT PROTECTION (If 23=0, disable)........................................... 29
6.5.4. WATER FLOW PROTECTION (F46=0, disable)............................................... 29

6.5.5. HIGH PRESSURE PROTECTION ...................................................................... 29
6.5.6. LOW PRESSURE PROTECTION....................................................................... 29
6.5.7. EXHAUST TEMPERATURE PROTECTION........................................................ 29
6.5.8. THE WATER TEMPERATURA DIFFERENT IS TOO LARGE PROTECTION ......... 30
6.5.9. LOW TEMPERATURE LIMITS THE COMPRESSOR RUNNING ......................... 30
6.5.10. ANTIFREEZE PROTECTION IN WINTER.......................................................... 30
6.5.11. SENSOR FAULT PROTECTION........................................................................ 30
6.6. TROUBLESHOOTING GUIDE SYSTEM FAULTS AND LIST OF ERROR CODES ....... 31
6.7. CONTROL LCD DISPLAY...................................................................................... 33
6.8. DISPLAY functions.............................................................................................. 37
7. GENERAL PRECAUTIONS................................................................................................. 39
8. CHECKING THE PACKAGING ........................................................................................... 40
9. ELECTRICAL CONNECTIONS ............................................................................................ 40
10. HYDRAULIC CONNECTIONS ............................................................................................ 42
11. START-UP PROCEDURE................................................................................................... 42
12. PREVENTIVE MAINTENANCE .......................................................................................... 43
13. WARRANTY AND GENERAL CONDITIONS ....................................................................... 44
14. RECYCLING INSTRUCTIONS............................................................................................. 45
15. WARRANTY CERTIFICATE................................................................................................ 46
15.1. 1. GENERAL CONDITIONS .................................................................................. 46
15.2. 2. PARTICULAR CONDITIONS ............................................................................. 46
15.3. 3. LIMITATIONS.................................................................................................. 47

LISTA DE CONTENIDOS…………………………………..……ESPAÑOL
1. INTRODUCCIÓN .............................................................................................................. 48
2. SEGURIDAD..................................................................................................................... 49
2.1. RESPONSABILIDAD DEL TITULAR ....................................................................... 49
2.2. CIRCUITO REFRIGERANTE .................................................................................. 49
2.3. EQUIPOS DE PROTECCIÓN INDIVIDUAL (EPI) .................................................... 50
2.4. PELIGROS DE CARÁCTER GENERAL.................................................................... 51
3. INSPECCIÓN DEL EMBALAJE ........................................................................................... 53
4. DESCRIPCIÓN DEL EQUIPO ............................................................................................. 54
4.1. COMPONENTES ................................................................................................. 54
4.2. DATOS TÉCNICOS............................................................................................... 55
4.3. DATOS ELÉCTRICOS............................................................................................ 55
4.4. DIAGRAMAS ELÉCTRICOS .................................................................................. 55
4.5. PESOS Y DIMENSIONES...................................................................................... 55
5. INSTALACIÓN DEL EQUIPO ............................................................................................. 56
5.1. INSTRUCCIONES DE SEGURIDAD ....................................................................... 56
5.2. REQUISITOS Y OPERACIONES PREVIAS.............................................................. 56
5.3. CONDICIONES DE TRABAJO ............................................................................... 57
5.4. DRENAJE DE CONDENSACIÓN ........................................................................... 60
6. REGULADOR ................................................................................................................... 61
6.1. FUNCIONES PRINCIPALES .................................................................................. 61
6.2. CARACTERÍSTICAS TÉCNICAS PRINCIPALES. ...................................................... 62
6.3. AJUSTE DE PARÁMETROS .................................................................................. 62
6.4. PRINCIPIO DE OPERACIÓN BÁSICO.................................................................... 66
6.4.1. MODO DE FUNCIONAMIENTO ..................................................................... 66
6.4.2. MODO CALEFACCIÓN ................................................................................... 66
6.4.3. MODO ENFRIAMIENTO (SOLO DISPONIBLE EN MODELOS CHILLER) ........... 67
6.4.4. AUTO MODE (SOLO DISPONIBLE EN MODELOS CHILLER)............................ 68
6.4.5. PROCESO DE DESESCARCHE ......................................................................... 68
6.4.6. CONTROL BOMBA DEPURADORA................................................................. 69
6.4.7. CONDICIONES DE FUNCIONAMIENTO VENTILADOR.................................... 70
6.4.8. INTERRUPTOR REMOTO ............................................................................... 70
6.5. SISTEMAS DE PROTECCIÓN ............................................................................... 70
6.5.1. PROTECCIÓN RETRASO COMPRESOR........................................................... 70
6.5.2. CONTROL DE FASE ........................................................................................ 70
6.5.3. PROTECCIÓN FRENTE SOBRE CARGA (Si F23=0, desactivado) ..................... 70
6.5.4. PROTECCIÓN CAUDAL DE AGUA (F46=0, desactivado)................................ 71

6.5.5. PROTECCIÓN ALTA PRESIÓN ........................................................................ 71
6.5.6. PROTECCIÓN BAJA PRESIÓN......................................................................... 71
6.5.7. PROTECCIÓN TEMPERATURA DESCARGA .................................................... 71
6.5.8. PROTECCIÓN DIFERENCIA DE TEMP. ENTRADA Y SALIDA DEL AGUA. ......... 71
6.5.9. LIMITE TEMPERATURA AMBIENTE BAJA ...................................................... 72
6.5.10. PROTECCIÓN ANTICONGELAMIENTO AGUA EN INVIERNO.......................... 72
6.5.11. PROTECCIÓN FALLO DE SONDAS.................................................................. 72
6.6. SOLUCIÓN DE PROBLEMAS. LISTA DE CÓDIGOS DE ERROR. ............................. 72
6.7. CONTROL PANTALLA LCD .................................................................................. 74
6.8. FUNCIONES DEL DISPLAY................................................................................... 78
7. PRECAUCIONES GENERALES........................................................................................... 80
8. COMPROBACIÓN DEL EMBALAJE ................................................................................... 81
9. CONEXIONES ELÉCTRICAS............................................................................................... 81
10. CONEXIONES HIDRAÚLICAS............................................................................................ 83
11. OPERACIÓN DE PUESTA EN MARCHA ............................................................................ 83
12. MANTENIMIENTO PREVENTIVO..................................................................................... 84
13. GARANTÍA Y CONDICIONES GENERALES ........................................................................ 85
14. PRECICLAJE DEL PRODUCTO........................................................................................... 86
15. CERTIFICADO DE GARANTÍA........................................................................................... 87
15.1. 1. ASPECTOS GENERALES................................................................................... 87
15.2. 2. CONDICIONES PARTICULARES ....................................................................... 88
15.3. 3. LIMITACIONES................................................................................................ 88
ANNEX
TABLE 1: TECHNICAL DATA [STANDARD & CHILLER]................................................................... 89
TABLE 2: TECHNICAL DATA [INDOORS] ....................................................................................... 90
TABLE 3: MAXIMAL ELECTRICAL DATA [STANDARD & CHILLER]................................................. 91
TABLE 4: MAXIMAL ELECTRICAL DATA [INDOORS] ..................................................................... 91
IMAGE 1: ELECTRICAL SCHEME [35kW, 45kW & 60kW] ............................................................. 92
IMAGE 2: ELECTRICAL SCHEME [90kW, 120kW] ......................................................................... 94
IMAGE 3: PROHEAT III STANDARD & CHILLER DIMENSIONS ...................................................... 96
IMAGE 4: PROHEAT III INDOORS DIMENSIONS........................................................................... 96
REPLACEMENT PARTS: HOUSING................................................................................................ 97
REPLACEMENT PARTS: REFRIGERANT CIRCUIT ........................................................................... 98
REPLACEMENT PARTS: ELECTRIC CIRCUIT................................................................................. 100

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
© FLUIDRA 2019 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT.
ENGLISH
Pag: 7
1. INTRODUCTION
Thank you for acquiring your new PROHEAT II equipment. The experience that company has
gained during more than 25 years in the world of air conditioning has been put to your service
in this product, in which we also incorporate the technical breakthroughs that turn this unit into
the equipment that can solve your water conditioning needs offering you the best possible
performancese
The information symbol indicates useful information for correct installation and proper
performance.
The warning symbol indicates important information to bear in mind to prevent risk of
injuries and / or damage for the user and / or the equipment.
The forbidden symbol indicates an operation / procedure that is forbidden and will cancel
the warranty.
WE RECOMMEND THAT YOU MAKE A NOTE OF THE FOLLOWING
INSTALLER
DATE
TELEPHONE
MODEL
SERIAL NO.
DISTRIBUTOR'S STAMP
INSTALLER'S STAMP
Please read this manual carefully to ensure proper installation and start-up, become
familiar with the full potential of the equipment and to bear in mind all the
circumstances required for proper equipment performance and long duration.
This equipment must be installed and repaired by certified professionals in the electrical,
hydraulic and refrigeration fields

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 8
2. SECURITY
2.1. RESPONSIBILITY OF HOLDER
The owner is the person, people or entity that operates the AIRPOOL series machines for a
commercial or economic use, therefore assumes the legal liability to protect the final user of
the instalations, the operator/s of the machine and any third parties involved in the operation
of this machine.
In conjunction with the security measures included in this manual, the owner must respect the
following:
•The owner must ensure that all the people in charge of the installation, operation,
technical servicing, maintenance and cleaning staff have been instructed concerning
the unit security measures, thus interacting with the machine in a safe way and
understanding the hazards involved.
•The owner must ensure that all the people that interact with this equipment have read
and understood these instructions. In addition, the owner must train and inform the
staff periodically.
•The owner must provide the staff adecuate protection gear to interact with the unit.
The owner is also responsible for ensuring that the machine is always in perfect condition.
Therefore, the following will apply:
•The owner must ensure that maintenance intervals described in these instructions are
met.
•The owner must regularly inspect all safety devices in terms of their operational
capability and integrity.
2.2. REFRIGERANT CIRCUIT
This machine contains a mechanical refrigeration system. The owner must ensure that the
people in charge of the operation, management and maintenance of the unit are subject
matter experts. Additionally, the owner must ensure that these people comply with the
regulations of the European Union, as well as the technical and legal requirements of the
region or country.
REGULATION (EU) No 517/2014 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16
April 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No 842/2006.
http://eur-lex.europa.eu/legal-content/ES/TXT/HTML/?uri=CELEX:32014R0517&from=EN

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 9
2.3. PROTECTION GEAR
Personal protective equipment serves to protect personnel against hazards that have an adverse
effect on occupational health safety. To carry out the various work on and with the equipment,
personnel must wear personal protective equipment:
SAFETY WORK CLOTHES
They are tight work clothes of low tear resistance, with narrow sleeves and
without protruding elements. It is intended for not being trapped by moving
parts of the machine. Do not wear rings, necklaces or other adornment
objects.
SAFETY SHOES
Safety shoes protect against heavy falling parts and avoid sliding on slippery
surfaces.
GLASSES AND EARPLUGS.
They serve to protect the eyes from projections of small-medium materials
and to protect the ears against high noise levels.
HEAT AND COLD PROTECTIVE GLOVES.
This gloves help protect hands against heat and cold burns in case of
touching very hot or cold surfaces.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 10
2.4. HAZARDS
This section identifies the residual risks identified through a risk assessment.
To reduce health hazards and avoid dangerous situations, pay attention to the safety
instructions listed below:
DANGER OF INJURY BY LIQUID ACCUMULATIONS:
Danger of slippage by liquid accumulation.
•Collect liquids accumulation with the proper means.
•Wear non-slip safety footwear.
Place warning and signaling signs in the area where liquid
accumulation may occur.
DANGER OF INJURY OR DEATH BY ELECTRICAL SHOCK:
In the event of direct contact with live parts, there is a risk of death from
electric shock. Damage to the insulation or damage to various components
can lead to death.
•Only qualified people may work on the electrical installation.
•If you notice any damage to the insulation, disconnect power
supply and proceed to repair any damage.
•Before starting any work on the electrical installation, follow the
following rules:
Remove power supply.
Safeguard against reconnection.
Check coltage absence.
Grounding and short-circuiting
Protect the work area.
DANGER OF INJURY BY MOVING PARTS: FANS
Rotating parts of the fans can cause serious injuries.
•Do not put your hands into the fan rotor or maintenance it
during operation.
•Do not open the machine’s panels during operation.
•Make sure that the fan rotor is not accessible during
operation.
•Pay attention to the fan stop interval before opening the
machine’s panels.
•
Before opening the fan, check that it is stationary.
DANGER OF INJURY BY SHARP EDEGES AND SHARP CORNERS:
Danger of injury with sharp edges and sharp corners.
Sharp edges and sharp corners on components housing parts can cause
cuts on the skin.
•When working in the vicinity of sharp edges or sharp corners,
proceed with coution.
•Wear protective gloves.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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DANGER OF INJURY BY REFRIGERANT GAS:
Refrigerant gases may cause disorders in heart rate and frostbite in case of
body contact, ingestion or inhalation.
•Avoid contact with refrigerant gases.
•Works on refrigeration systems must be carried out by qualified
personnel.
•When working with refrigerants, do not eat, drink or smoke. Wash
your hands after finishing work.
•Wear all necessary protection gear: clothing, gloves, glasses ...
•Work in a ventilated place.
DANGER OF INJURY BY HOT SURFACES:
The surfaces of some components may become hot during operation of
the equipment. Contact with skin can cause severe burns.
•When working in the vicinity of hot surfaces, wear protection gear:
clothing and safety gloves.
DANGER OF INJURY BY COLD SURFACES:
The surfaces of some components may become cold during operation of
the equipment. Contact with skin can cause severe freeze-burns.
•When working in the vicinity of cold surfaces, wear protection gear:
clothing and safety gloves.
DANGER OF INJURY BY PRESSURIZED GASES:
Pressurized components of the equipment can leak fluids under high
pressure if they are handled incorrectly or in case of defect and cause
serious injuries.
•Before working with the pressurized
elements, remove the
pressure.
DANGER OF INJURY BY FIRE:
If the fire extinguishing media is not ready for use or is inadequate, serious
injury or death may occur as well as serious material damages.
•Make sure that there is adequate extinguishing media at the site.
•Check extinguishing media periodically.
•Replace or replenish the extinguishing media after each use.
•When using extinguishers, pay attention to the instructions for use.
DANGER OF INJURY OR DEATH BY FAULTY SECURITY SYSTEMS:
If safety devices are not working correctly or have been tampered with or
manipulated, there is a risk of serious injury, even death.
•Before starting any work on the equipment, check that all safety
devices are in working order and correctly installed.
•Do not override or short circuit any safety device.
•Make sure that all safety devices are accessible at all times.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 12
3. PACKAGING INSPECTION
This equipment comes with RECYCLABLE packaging that can withstand rough transport
conditions. However, you should examine the device during installation to ensure there is no
damage, thus avoiding any subsequent malfunction. The MANUFACTURER will not be held
responsible in this case
If the unit/package is damaged upon delivery, or the delivery itself is incomplete, make a
note on the carrier’s bill and immediately place a claim to the carrier company.
IS VERY IMPORTANT TO KEEP THE PACKAGED EQUIPMENT UPRIGHT, THE PACKAGING HAS BEEN
SPECIFICALLY DESIGNED FOR THIS. ALWAYS MAINTAIN IT IN A VERTICAL POSITION.
IF THE UNIT IS DAMAGED, OR THE DELIVERY IS INCOMPLETE, MAKE A NOTE OF IT ON THE CARRIER'S BILL AND
IMMEDIATELY MAKE A CLAIM TO THE COMPANY IN CHARGE OF DELIVERY.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 13
4. EQUIPMENT DESCRIPTION
The Air/Water heat pump is used to heat the pool basin and thereby prolong the bathing season,
by taking advantage of the energy in the air provided by the sun.
4.1. COMPONENTS
The heat pumps are equipped with the following components:
Robust and lightweight design in an aluminium magnesium alloy that is resistant to solar
radiation over an aluminium frame. The colour does not deteriorate.
High performance evaporator battery (gas-air heat sink), manufactured in copper tube with
lacquered aluminium fins that are specially designed for corrosive and coastline
environments.
Fan(s):
Axial fan(s). (standard and chiller models).
Centrifugal fan (indoors models).
Scroll Compressor.
G2 titanium water condensers. Guaranteed corrosion resistance.
Coolant gas R-410-A.
High and Low pressure switches (HP/LP).
Expansion by thermostatic mixing valve with external balancer.
By-flow dehydrator filter.
Hydraulic circuit with waterflow switch at the water intake, manufactured in PVC pipe.
Flow switch for flow control.
Water treatment system control.
Electrical protections for switchgear and power.
User-friendly control panel with current temperature, setpoint and alarm messages display

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 14
4.2. TECHNICAL CHARACTERISTICS
Main technical data of the machines of the PROHEAT II series:
•PROHEAT II, standard and chiller models, consult:
TABLE 1: TECHNICAL DATA [STANDARD & CHILLER], pág. 89.
•PROHEAT II, indoor models, consult:
TABLE 2: TECHNICAL DATA [INDOORS], pág. 90.
4.3. ELECTRICAL CHARACTERISTICS
Electrical control panel for complete process control and to guarantee optimum performance
with minimum power consumption at all times. Containing the following components:
•Circuit breakers.
•Contactors and thermal relay
•Interconnection and ground terminals.
•Card controller and Display.
•Power Supply.
Main electrical data of the PROHEAT II machine series:
•PROHEAT II, standar and chiller models, consult:
TABLE 3: MAXIMAL ELECTRICAL DATA [STANDARD & CHILLER], pág. 91.
•PROHEAT II, indoor models, consult:
TABLE 4: MAXIMAL ELECTRICAL DATA [INDOORS], pág. 91.
4.4. ELECTRICAL DIAGRAMS
To look up electrical diagrams of the different equipment, consult
•PROHEAT II, all equipment with 90 35 kW, 45 kW y 60 kW, consult:
IMAGE 1: ELECTRICAL SCHEME [35kW, 45kW & 60kW], pág. 92.
•PROHEAT II, all equipment with 90 kW y 120 kW, consult:
IMAGE 2: ELECTRICAL SCHEME [90kW, 120kW], pág. 94.
4.5. SIZE
To look up the dimensional data and weight of the product PROHEAT II, see:
•PROHEAT II standard and chiller models, consult:
IMAGE 3:
PROHEAT II STANDARD & CHILLER DIMENSIONS, page 96.
•PROHEAT II indoors models, consult:
IMAGE 4:
PROHEAT II INDOORS DIMENSIONS, page. 96.
A general rule for the power cable is: section of 1 mm2for every 5 amps for cable
lengths of up to 20 meters, although this rule has to be verified and adapted for each
installation and for lengths of more than 20 meters and always in accordance with local
requirements / regulations.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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Pag: 15
5. EQUIPMENT INSTALLATION
These units are supplied fully assembled, with complete electrical wiring and its definitive charge
of refrigerant gas R410A. Furthermore, every assembled machine has been put to the test inside
a test laboratory inside the manufacturing factory before shipping to clients.
The hydraulic circuit of the unit has been carefully drained to avoid residual water in the casing
of the evaporator and prevent any risk of corrosion in case of prolonged storage of the machine.
5.1. SAFETY INSTRUCTIONS
Always ensure that Personal protective equipment is usd to protect personnel against hazards
that have an adverse effect on occupational health safety. Refer to paragraph 2.3. , pág 9.
All the people in charge of the installation of the unit must have been instructed concerning the
unit security measures, thus interacting with the machine in a safe way and understanding the
hazards involved. Refer to paragraph 2.4. pág. 10
5.2. REQUIREMENTS AND PREVIOUS OPERATIONS
All models:
•Check the place where the equipment is to be located is strong enough to support the
weight of this.
•To improve the distribution of weights, the unit will be placed on a bench according to
the designer's criteria.
•Always place the machine in a vertical and level position.
•The PROHEAT II equipment is designed to work:
oStandard and chiller models: Outdoor installation.
oIndoors models: Indoor installation.
•A space must be provided around the equipment for its maintenance and operation, in
addition to checking that the air inlet and outlet are not obstructed.
•It is not advisable to place the machine 1.5 meters above the sheet of water, or 3 meters
below.
•During operation, condensation water produced by the evaporator may appear, for
which the machine has an evacuation outlet identified on one side.
•To avoid any corrosive process in the evaporator battery, the unit can not be installed
in an acidic or alkaline environment.
In addition, the Indoors models must take into account the following:
This appliance must be installed and serviced by certified professionals, approved in
electrical, hydraulic and air conditioning domains.
For any questions regarding unit installation, please, take note of the machine model,
serial number, manufacture year, and contact us

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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•The arrangement of the air ducts must be of an adequate size and the loss of load of the
ducts must not exceed the available pressure of the installed fans.
•The aspiration and impulsion of the equipment will be installed at a sufficient distance
between them so that undesired recirculation can not occur.
•It is also desirable to provide a removable door or plate in the outdoor air intake duct to
be able to check its condition and proceed to clean any dirt that may be trapped in the
air inlet of the unit.
•Leave at least 1 meter of unused space around the equipment to facilitate personnel
access and maintenance operations.
5.3. OPERATING CONDITIONS
Water physical and chemical parameters must be in between:
•PH ......................................................... 7,2 a 7,8
•Residual chlorine................................... 1 a 2 ppm
•Alkalinity ............................................... 80-125 ppm
•Total dissolved solids ............................ <=3000 mg/l
•Hardness ............................................... 200-300 ppm
The limits established for working conditions in order to guarantee the proper operation of the
equipment are:
•Minimum outside temperature: ...........................0 °C.
•Maximum pool water temperature: .....................40 °C.
•Minimum water cooling temperature ..................20º C (Only CHILLER MODELS, for
lower operating temperatures, consult Fluidra Comercial)
•Maximum input water pressure:...........................3,5 bar.
•Maximum conditions of the technical room.........35 °C / 90% RH (INDOOR MODELS).
The operating conditions will affect the output of the equipment.
The operating conditions will influence the performance of the equipment and the power data
provided in the data sheet may vary, if these placement recommendations do not occur. It is
The primary hydraulic circuit, used to heat the pool water, must not be galvanized steel
or aluminum. Corrosion problems may appear due to galvanic corrosion
•The standard and chiller models have been designed for outdoor installation
(never indoors).
•
The Indoor models have been designed for installation indoors (never
outdoors).).
THE WARRANTY WILL BE VOID IF THIS CONDITION IS NOT FULFILLED

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
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extremely important that the minimum water flow indicated in the technical sheet is
guaranteed. If this flow is reduced, the compressor dew point is higher, and the energy
consumption is higher.
In INDOOR equipment, under certain conditions of temperature and humidity, condensation
may appear on the outside of the equipment. This is normal and does not affect the correct
operation of the equipment.
Example of installation of Proheat II equipment with Axial fan for outdoor installation only:
V1-V2-V3: By-pass valves. (Required for all models)
V3
V1
V2

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Installation example of the Proheat II INDOOR equipment with centrifugal fan for indoor
installation only:
It is necessary to make the duct network so that the air collected by the machine to operate
the refrigeration circuit, never return to the machine, and must be expelled to the street. The
machine must be located exclusively inside.
In this example of installation, it can be seen that the technical room is perfectly ventilated
through a grid of sufficient size to guarantee the correct flow of air through the evaporator. And
that the driving air is driven outside.
If the distance between the machine and the outside air is too high, a duct can be connected
directly to the evaporator inlet, as long as the nominal air flow of the equipment is
guaranteed. The limit of loss of load of these models Indoor is 120 Pa, and if this value is not
respected, the heat pump can be damaged. For greater load losses available, consult Fluidra
Comercial.
V4-V5: Adjustment valves
SIPHON
V4
V5

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
© FLUIDRA 2019 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT.
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Pag: 19
5.4. CONDENSATION DRAIN
The AIRPOOL dehumidifier will naturally generate condensation water. This water will be
gathered inside the machine and will come out through a condensation drain located on the
frame of the equipment. The installation must have a drain to evacuate such condensation
water.
The condensation drain is identified by this decal on the machine:
It is advised to install a siphon in the condensation drainage to prevent liquid and odours
returns.

PROHEAT II SERIES · HEAT PUMP AIR/WATER SYSTEM
© FLUIDRA 2019 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT.
ENGLISH
Pag: 20
6. CONTROLLER
6.1. MAIN FUNCTIONS
The NA8981 regulator is ideal to control air-water heat pumps with on or two compressors. It is
equipped with temperature probes (water input and output, evaporator defrost, compressor
discharge and ambient temperature). It also has safety sensors (high and low pressure switches,
a flow switch to control water flow through the equipment, compressor consumption meter and
internal fan thermal switch).
Its main functions are shown below:
•TEMPERATURE DISPLAY AND CONTRILLING:The display shows the water temperature
at all times and the user can choose the setpoint between the operating limits. The
settings of the temperature probes can also be displayed.
•AUTO DEFROST CONTROLLING: It has an optimized design of logical defrost controlling
and can defrost effectively in order to ensure the machine can run normally at low
temperature.
•EXHAUST TEMPERATURE PROTECTION:If the discharge temperature of the compressor
is too high, the machine will stop and an alarm will appear on the display (A24 or A25).
•HIGH AND LOW PRESSURE PROTECTION: The machine is equipped with high and low
pressure switches that stop the machine and displays an alarm if either pressure exceeds
its limits (A11, A12, A13 or A14).
•DIFFERENT PERIOD OF OPERATION: The regulator has two operating modes: "Heating"
and "Schedule programming". In the "Heating" mode, the machine will operate until the
water temperature reaches the setpoint temperature set by the user. In the "Schedule
programming" mode, as many as three machine operating periods can be scheduled
(See STARTING BASIC OPERATION).
•PHASE MISSING PROTECTION AND SEQUENCE PROTECTION:When any of the 3 phases
supplying the equipment fails or the 3 phases have been connected incorrectly, the
machine will stop and an alarm will appear on the display (A91).
•DISPLAY OF COMPRESSOR CONSUMPTION AND PROTECTION VERSUS EXCESS
CONSUMPTION: The regulator shows compressor consumption (A) on the screen. If
consumption is excessive, the machine will stop and an alarm will appear on the display
(A93-A94).
•SEQUENTIAL COMPRESSOR START-UP: The regulator starts up the compressors in
sequence to avoid excess peak power use in the line.
•WINTER ANTI-FREEZE PROTECTION: This protection allows the regulator to recirculate
the water by starting up the water treatment pump so the water does not remain in the
frozen pipes (See PROTECTION SYSTEMS).
•TRIP CIRCUIT: The regulator uses this function to protect the machine in the event of
faults affecting the contactors or an error in the supply line.
•EMERGENCY OPERATION FUNCTION: If communication fails in the LCD display, the
machine can operate with the most recently saved settings.
•EMERGENCY STOP: The equipment is prepared with an emergency push-button with a