HeatStar Aquarius 1 User manual

Aquarius
Product Manual
© Copyright HS Europe Limited 2009
All rights reserved. No part of this document may be stored in a retrieval system, or transmitted in any form or by any means to persons not
employed by Heatstar without written permission of HS Europe Limited.
Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to make amendments or
correct omissions. HS Europe Limited cannot accept responsibility for damage, injury, or expenses resulting there from.
Printed in the UK

1
IMPORTANT
This product has been thoroughly tested before leaving the Heatstar factory.
However, please check at the earliest opportunity that the product has arrived in good condition and that no
transport damage is apparent. If any damage is suspected, please contact the suppliers / carriers immediately.
The product MUST be protected from the elements and not exposed to temperatures below freezing during
transport or storage.
Please take the time to read this manual thoroughly before commencing installation.
If there are any questions then please contact Heatstar Customer Support :
Tel : [phone]
Fax : [phone]
E-Mail : [e-mail]
WARNING
Only suitably qualified personnel who thoroughly understand the operation of this product and any associated
machinery should install, start-up or attempt maintenance of this product. Non-compliance with this warning may
result in personal injury and / or equipment damage.
Never work on any control equipment without first isolating all electrical power supplies from the equipment.
The product must be connected to an appropriate electrical safety earth. Failure to do so represents an electrical
shock hazard.
INTENDED USERS
This manual is to be made available to all persons who are required to install, operate or service the product or
any other associated operation. Please ensure that a copy of this manual is presented to the end customer.
Additional copies of this manual are available on request.

2
WARRANTY
HS EUROPE LIMITED warrants the Heatstar product against defects in materials and workmanship for a period
of twelve months from the date of delivery on the terms detailed in HS Europe Limited Conditions of Sale. (*)
During that period, HS EUROPE LIMITED will remedy all such defects within the UK without charge for parts or
labour, upon proof of purchase within the warranty period. Warranty provision for product sales and installations
outside the UK will be by prior agreement only.
This warranty does not extend to damage resulting from improper installation, misuse, neglect or damage.
In no event shall HS EUROPE LIMITED be liable for incidental or consequential damages.
NO CLAIMS WILL BE ACCEPTED IF :-
The Heatstar product is in any way incorrectly applied for the application in terms of performance capacity or
suitability.
The Heatstar product is installed in any way that is not in accordance with current procedures as defined by HS
EUROPE LIMITED from time to time and documented in the installation manual.
The Heatstar product has been worked upon or adjusted by anyone other than a person authorised to do so, in
writing, by HS EUROPE LIMITED (external control panel settings excluded).
The air flow to and from the Heatstar product is restricted.
The pool water flow through the Heatstar product is more than 20% higher orlower than the indicated rating.
Any chemical dosing method, whether in tablet form or otherwise, has been introduced upstream of the Heatstar
product within the pool water filtration circuit, prior to being diluted by the main body of the pool water.
Any electrolytic or salt based water purification systems have been used on the pool.
The product has not been ‘winterised’correctly.
Any form of air corrosion damage within the Heatstar product is found to be present.
The Heatstar product has suffered damage through the freezing of water inside.
The electrical supply to the Heatstar product is incorrect and outside of the specification rating required for the
product.
(*) The titanium pool water condenser coil is guaranteed indefinitely.
Please note that the manufacturers warranty runs from the DATE OF DELIVERY and not from when the system
is installed or commissioned.
YOUR STATUTORY RIGHTS ARE NOT AFFECTED.
Extended warranty cover can be obtained for the Heatstar product after the initial period for an additional
premium, see ‘Extended Warrantees’.

3
HOW TO USE THIS MANUAL
This manual provides information to support the installation and operation of the Heatstar product. The manual is
divided into sections covering the various aspects of the installation and operation procedure. The following
index is given to assist in locating and using the information contained within the manual :
INFORMATION :
WARRANTY REGISTRATION . . . . . . 4
PRODUCT OVER VIEW . . . . . . . 5
PRINCIPLE OF OPERATION . . . . . . 5
INSTALLATION :
LOCATING THE HEATSTAR UNIT . . . . . 5
INSTALLATION REQUIREMENT SUMMARY . . . . 6
APPLICATION NOTES . . . . . . . 6
OFF LOADING AND MANOEUVRING THE UNIT . . . 6
MINIMUM MAINTENANCE ACCESS . . . . . 7
POSITIONING THE UNIT . . . . . . . 7
AIR FLOW THROUGH UNIT. . . . . . . 7
POOL WATER PLUMBING . . . . . . . 8
ELECTRICAL INSTALLATION . . . . . . 10
CONDENSATE WATER DRAINAGE . . . . . 13
OPERATION :
PRINCIPLE OF CONTROL . . . . . . . 14
ABOUT THE CONTROLS . . . . . . . 15
PUTTING THE HEATSTAR UNIT INTO COMMISSION . . 16
CHECKING THE INSTALLATION SERVICES . . . . 17
ABOUT THE WARMING UP PERIOD . . . . . 18
MAINTENANCE :
MAINTENANCE REQUIREMENT . . . . . 18
ICING REGULATION . . . . . . . . 19
WINTERISING . . . . . . . . 20
CORROSION DAMAGE PREVENTION . . . . . 21
FAULT FINDING . . . . . . . . 23
EXTENDED WARRANTEES. . . . . . . 26
EC DECLARATION OF CONFORMITY . . . . . 27

4
WARRANTY REGISTRATION
To ensure that the correct warranty is given and to enhance response and efficiency should a service call prove
necessary under the manufacturers warranty, the ‘Warranty Registration Form’should be completed and
returned to HS Europe Ltd as soon as possible.
The information contained will definitely NOT be forwarded to any third party and your statutory rights are not
affected.
NAME : ______________________________________
ADDRESS : ______________________________________
______________________________________
______________________________________
___________________________
DAY TIME TEL. No. : __________________________
EQUIPMENT MODEL : __________________________ (If known).
SERIAL No. : __________________________ (If known).
NAME OF SUPPLIER : __________________________
Do you wish to receive details relating to routine maintenance of the equipment at this time (See ‘maintenance’) :
YES / NO
SEND TO : HS EUROPE LIMITED
Manners View, Dodnor Park, Newport, Isle Of Wight, England,
UK. PO30 5FA
Heatstar would be pleased to provide a stamped, addressed envelope on request.
Thank you for your assistance.

5
PRODUCT OVERVIEW
PURPOSE :
The Heatstar Aquarius is a unit which is intended to be used, in association with other equipment and services,
to facilitate heating of the water within a swimming pool.
MAJOR COMPONENTS :
The Aquarius units incorporate the following major components :
- An air fan to draw fresh air through the unit.
- A refrigeration system to collect heat from the fresh air.
- A heat exchange coil to transfer energy collected from the fresh air directly into the pool water.
- An integral direct electric resistance heating coil (‘Plus’versions only).
PRINCIPLE OF HEAT PUMP OPERATION
The Heatstar unit is a comparatively simple machine based around proven and reliable refrigeration technology.
The Heatstar unit incorporates an air fan and a large refrigeration circuit driven by a highly efficient electric
compressor motor. Such a system is often referred to as a heat pump or reverse refrigerator.
When the internal thermostat within the Heatstar unit senses that the pool water requires heating, the fan and the
refrigeration system switches on automatically and the air heat transfer coil becomes cold.
Fresh air is drawn through the Heatstar unit by the electric fan and chilled by the refrigeration system. The heat
chilled from the fresh air, together with all the electrical energy consumed in operating the refrigeration circuit, is
then transferred via a heat exchanger directly into the pool water as it is passed through the Heatstar unit.
As you only pay for the cost of running the electric fan and compressor motors, all the additional heat absorbed
from the fresh air is effectively completely free.
Within a typical installation, for every kW of electrical heat which is paid for, the unit can typically absorb up to a
further four kW of free heatfrom the air, therefore easily outperforming any other alternative method of heating.
‘Plus’versions also contain a direct electric resistance pool water heater to provide boost heat, primarily at the
start of the swimming season.

6
LOCATING THE HEATSTAR UNIT
The Heatstar unit can be located either outside or within a plant room.
It does not matter if the unit is sited in sunlight or in shade.
All that is required is a free flow of fresh air and that the air already used by the Heatstar unit is discouraged from
re-cycling back into the unit.
Please also consider that regular access would be required to the internals of the Heatstar unit for servicing and
maintenance. Therefore the chosen location must be large enough to accommodate the Heatstar unit and to
enable sufficient access to the unit for essential maintenance.
Under certain conditions, a limited amount of water may be produced from the base of the Heatstar unit.
If the Heatstar unit is to be located at a level lower than that of the pool, then wiring may be required for an
electrical interlock with the pool filtration pump.
The Heatstar unit will produce noise when operating and would normally be available to run both day and night.
Therefore, do not position the unit near to a bed room or where neighbours may be disturbed.
INSTALLATION REQUIREMENT SUMMARY
The Heatstar unit would require :
- A mains electricity supply.
- Pipe work connections from the pool water filtration circuit.
- A waste drain for water condensed from the fresh air.
- A free flow of fresh air.
APPLICATION NOTES
If a salt chlorination or electrolytic system is to be used on the pool then contact Heatstar immediately.
It should be noted that swimming pool liners can be damaged if the pool water temperature is too high. If a pool
liner is used, then the maximum temperature which the liner will stand should be confirmed and the pool water
temperature maintained and monitored below that temperature.
OFF LOADING & MANOEUVRING
The Heatstar unit is heavy and the use of lifting apparatus is strongly recommended to off load the unit from the
delivering lorry and to manoeuvre the unit into position.
A minimum of two people will be necessary to sensibly manoeuvre the unit.
Do not drop or jar the unit from any height - not even two or three inches. Move it gently and progressively.
Do not lean the unit by more the 60°. The unit contains heavy motors which are mounted from the base.
The Heatstar unit can be damaged if due care is not taken, particularly the refrigeration system which may be
fractured resulting in refrigerant loss.
Do not attempt to lift the Heatstar unit by the pipe out lets or the electrics tray handles - this will cause damage
and leaks.
The Heatstar unit will pass through a standard door opening.

7
MINIMUM MAINTENANCE ACCESS
A minimum clearance of 900mm is required on the control panel side and on one other side of the Heatstar unit
and 120mm minimum clearance on the other two sides.
This represents the absolute minimum clearance required for essential maintenance. Ideally, considerably
greater access all around the Heatstar unit is desirable.
POSITIONING THE UNIT
Provide a firm, level plinth, capable of supporting the Heatstar unit.
The Heatstar unit will then simply sit on this plinth.
AIR FLOW THROUGH UNIT
Due consideration must be given to the position of the fresh air intake and cold air exhaust onto the Heatstar
unit.
The large grille next to the control panel is the fresh air intake. The smaller grille by the fan on the opposite side
to the control panel is the cold air discharge.
If the unit is located outside :
Ensure that the large air intake grille has a minimum clearance of 900mm and is not obstructed.
Ensure that the air discharge is not obstructed by fencing or hedging etc. If there is an obstruction, then the
discharged air should be channelled through or around the obstruction.
The discharged air should be discouraged from being re-circulated back into the fresh air intake.
Ensure loose debris such as leaves, grass cuttings etc will not block air inlet grille.
If the unit is located within a plant room or other area :
A suitable louvre or vent must be provided to allow fresh air to freely enter the plant room. Often it is possible to
use a louvred entry door etc.
The louvre should be no smaller than the equivalent area of 700mm x 700mm and the louvre must have a free
area of at least 70% of this size.
If the fresh air is drawn from a pool dome or pool room, fresh air must freely be able to enter the room in
question as described above.
The discharged air must be channelled to pass directly back out of the plant room to outside via a suitable hole
without mixing with the fresh air supply to the Heatstar unit.
The area of the hole and duct channel should be no smaller than the air discharge grille on the Heatstar unit.
The exhaust air channel can simply be formed from marine quality plywood etc. and sealed with silicon based
sealant.
To aid connecting the air discharge duct channel onto the Heatstar unit, a special grille riser is available,
providing a spigot over which the duct channel can sleeve.
The length of the duct channel taking the discharged air back outside should be no greater than 1700mm.
Any fuel boiler located within the same room as the Heatstar unit should be fitted with a balanced flue. Otherwise
the combustion of a conventional flue boiler may be affected by the draw of the air fan within the Heatstar unit.
If in any doubt please contact Heatstar.

8
POOL WATER PLUMBING
The Heatstar unit requires connection into the pool water filtration pipe work :
POOL WATER FLOW SPECIFICATIONS :
The enclosed ‘Pool Water Specification’table indicates the required flow rates and resistance through the
Heatstar unit.
PIPE WORK CONNECTIONS :
The inlet and outlet to the Heatstar unit are connected via the return line going to the pool i.e. after the pump and
filter.
The pool water inlet and outlet connections on the Heatstar unit are marked and must be connected as
indicated.
The Heatstar unit has 1.5”diameter PVC stub connections suitable for solvent welds.
The Heatstar unit should be connected via breakable couplings.
It is suggested that the connection of the Heatstar unit is the last to be made in the pool water circuitry to prevent
damage to the stub connections on the Heatstar.
ROUTING OF PIPE WORK :
Do not route pipe work across the service access panels of the Heatstar unit.
All pipe work must be adequately supported with allowance for expansion and contraction.
POOL WATER BY-PASS :
A by-pass facility with shut off valves should be installed on the connections to the Heatstar unit. This will enable
the pool filtration system to operate normally in the unlikely event of a leak within the Heatstar unit.
If any valve positioned after the unit is closed whilst the circulating pump is still running, the increase in pressure
may damage the Heatstar unit. It is therefore recommended that the handles be removed from such valves and
placed inside the access panel of the Heatstar.
CHEMICAL DOSING :
All purification devices and chemical injection systems must be fitted DOWN STREAM of the Heatstar unit.
If they are before the Heatstar unit in the line of flow, then serious damage may occur to the Heatstar unit.
This includes the practice of dosing slow dissolving tablets via the skimmer or pump basket, which can result in
concentrated corrosive liquids passing over vulnerable metal components within the Heatstar unit.
This relates to any slow dissolving tablets of ANY description, whether chlorine based or not.
Please note that the installation and usage instructions for the chemical dosing equipment often recommend that
the chemical is introduced before the pool water sand filter. This should NOT be done unless the Heatstar unit is
installed on a completely different pipe circuit fed from a second filtration pump.
NON-RETURN VALVE :
If the chemicals are introduced down stream of the Heatstar unit but, if the filtration pump stops or the filtration
system is drained down, the chemicals can be drawn back through the Heatstar unit, then, to prevent this, a non-
return valve must be fitted.
The Heatstar unit is not warranted for use in conjunction with any form of salt chlorination of electrolytic system.

9
INDEPENDENT HEATING :
Any existing or independent method of pool water heating must be installed down stream of the Heatstar unit.
MAXIMUM PRESSURE AT HEATSTAR UNIT :
The maximum working pressure at the Heatstar unit should not exceed 23 PSI.
POOL WATER CIRCULATING PUMP OPERATION :
Effective operation of the Heatstar unit can only take place if the pool water filtration pump is providing an
adequate flow of water to the unit. If the filter pump is not running then the Heatstar unit can not operate.
The pool water filtration pump can be operated on a time clock, as long as the pump is running a sufficient
number of hours per day to enable adequate heating. The number of running hours necessary is constantly
variable but less running time will be necessary during warmer weather.
POOL WATER FLOW THROUGH HEATSTAR UNIT :
The Heatstar unit is fitted with a water pressure sensor which stops the operation of the unit when the pool water
filtration pump is not operating or insufficient pool water pressure is available.
It is possible that the flow of pool water, although inadequate, may not be insufficient enough to trigger the water
flow sensor. It would then be possible for the Heatstar unit to cut-out on ‘SYSTEM CUT-OUT’and the
corresponding red neon will be lit. If this happens then the water flow should be restored and the Heatstar unit
re-set, refer to 'fault finding'.
HEAD OF WATER :
If a head of water exists above the Heatstar unit, then sensitive adjustment of the internal pressure sensor may
be necessary - please consult Heatstar for further details.
Equally, if a head of water exists, then it is possible to electrically interlock the function of the heat pump with the
operation of the pool filtration pump, see ‘electrical installation’.
However, with this arrangement, the Heatstar unit may over-heat and re-setting of it’s ‘system cut-out’trip may
be necessary during the back washing of the pool filter. This is because, although the pool pump is running
during back wash, no water is being delivered to the Heatstar unit.
AIR VENTING OF POOL WATER PIPE WORK :
If the Heatstar unit is positioned at a higher level than the pool water filtration equipment, then a facility for
venting air from the pool pipe work will be required.

10
ELECTRICAL INSTALLATION
WARNING !
The Heatstar unit embodies electrical and rotational equipment.
Only qualified personnel who thoroughly understand the operation of this equipment and any associated
machinery should install, start-up or attempt maintenance of this equipment. Non-compliance with this warning
may result in personal injury and / or equipment damage.
Never work on any equipment without first isolating all power supplies from the equipment.
STANDARDS AND REGULATIONS
All relevant national standards and local electricity board regulations must be observed at installation.
ELECTRICAL CONNECTIONS
All electrical connections are made to the terminals located behind the control panel. To reveal the terminals,
simply unscrew the fixing screws on the control panel and draw the control panel towards you using the handles
provided.

11
ELECTRICAL CIRCUIT PROTECTION
EARTHING :
The Heatstar unit must be connected to an appropriate safety earth. Failure to do so presents an electrical shock
hazard.
The circuit protection to the Heatstar unit should allow for three separate aspects being a Residual Current
Device, Miniature Circuit Breaker and local Isolator Switch :
RCD :
The mains power electricity supply to the Heatstar unit should be routed via a suitably sized Residual Current
Device (RCD).
An RCD is sometimes referred to as a Residual Current Circuit Breaker (RCCB) or Earth Leakage Circuit
Breaker (ELCB). An RCD rating of 30mA is normally advised.
The purpose of the RCD is to protect against fatal electric shock to personnel, by reducing to safe levels (not
eliminating) the value and length of time a person is exposed to current flow through the body.
Equally the RCD will help protect equipment from fires started by low fault currents passing from Live to Earth,
that a normal fuse or circuit breaker may not detect.
PHASE PROTECTION :
If the mains electrical supply is Three Phase in nature, then phase protection must be provided as part of the
circuit protection. This is to guard against the possibility of one or two of the phases being temporarily isolated
due to a power cut etc.
If all three phases are not isolated together, at exactly the same time, then the large electric motors within the
Heatstar unit will be damaged. Such damage is not covered under the manufacturers warranty.
CIRCUIT BREAKER :
In addition to an RCD, the mains supply to the Heatstar unit must be protected by a Miniature Circuit Breaker
(MCB).
An MCB is a circuit protection device similar to a simple fuse, but re-settable.
An MCB normally have two modes of operation :
Thermal Overload Protection - to protect cabling and equipment from ‘long term’over current damage.
Magnetic Short Circuit Protection - to protect cabling and equipment against very high fault currents caused by
terminal component failure.
An MCB is rated by the normal carrying current, normal carrying voltage and by the maximum fault current and
voltage they can safely / repeatedly break.
As the Heatstar unit incorporates large electric motors, with high initial starting current loads, we recommend the
use of a ‘Type C’MCB, which allows for this initial starting load.
Standard fuses should not be used in place of a proper MCB.
LOCAL ISOLATOR SWITCH :
An isolator switch is fitted to the Aquarius unit.
All other electrical connections to the Heatstar unit, such as pool pump interlock, must also be isolated from the
same point and routed via the same MCB.

12
MAINS ELECTRICITY SUPPLY
MAXIMUM SUPPLY LOADS :
The table in ‘electrical specifications’indicates the maximum loadings for each model. Alternatively view the data
plate mounted by the electrical connections.
The Heatstar unit incorporates two motors being the air fan and, largest of all, the refrigeration compressor
motor.
The starting of the motors are off set using time delays to limit the starting electrical load.
The initial load drawn, for a fraction of a second, by each of the motors on starting, will be approximately three
times the normal running Amps.
The normal running amps drawn by the Heatstar unit will vary depending on the fresh air temperature/humidity
conditions and the pool water temperature. This is due to internal working pressures within the system and is
quite normal.
SUPPLY VOLTAGE :
The voltage limits indicated in the Electrical Specifications must not be exceeded.
The correct voltage must be available under the Starting Load Current.
POWER CABLE SIZING :
The Heatstar unit must be connected with the correct cable size.
The cable supplying electricity to a machine with a given electrical load must increase in cross sectional area as
the length increases in order that the voltage drop within the cable does not exceed the recommended limits.
This is a particular consideration where long cable runs are necessary to route electricity through the garden to
the swimming pool.
The motors within the Heatstar unit can be damaged if voltage drop occurs.
Power cables must have a minimum rating of 1.1 x Full Load Current.
The mains cable should be run in Conduit or armoured casing.
EXTERNAL CONTROL AND SWITCH GEAR :
No motor starter, thermal over load or other switch gear should be connected on the mains power supply to the
Heatstar unit.
In order to heat the pool water properly, the Heatstar unit requires a continuous mains power supply, 24 hours
per day. Therefore time clocks etc. should not be installed on the heat pump.
If the operation of the Heatstar unit is required to be limited on a time basis, then a time clock should be fitted to
the pool filtration pump and the Heatstar unit will then function in line with the pool pump.
HIGH VOLTAGE TEST :
Never perform high voltage resistance checks on the wiring without first disconnecting the Heatstar unit from the
circuit being tested.

13
POOL PUMP INTERLOCK
It is possible to switch the operation of the Heatstar unit off electrically in conjunction with the pool water filtration
pump.
Note : this would normally only be connected if the Heatstar unit is positioned at a lower level than the swimming
pool, preventing the pool flow pressure switch within the Heatstar from operating correctly.
Within the Heatstar electrical terminals there are a pair of terminals marked ‘pool pump interlock’.
These terminals are normally bridged by an electrical link.
The left hand terminal of the pair carried a 240v supply on the control circuit and is protected by a 3 Amp fuse.
If this supply is ‘returned’to the right hand terminal of the pair (i.e. closed circuit), then the Heatstar unit will run
normally. If the supply is not returned (i.e. open circuit), then the Heatstar unit will be prevented from operating.
Therefore, to govern the Heatstar unit, it is possible to connect these terminals to a remote relay which is
switched by the action of the pool filtration pump starter.
However, with this arrangement, the Heatstar unit may over-heat and re-setting of it’s ‘system cut-out’trip may
be necessary during the back washing of the pool filter. This is because, although the pool pump is running
during back wash, no water is being delivered to the Heatstar unit.
CONDENSATE WATER DRAINAGE
Under normal operation the Heatstar unit will produce condensate water at a rate up to 0.5 Litres per minute.
The condensate drain connection is located under the base of the product.
Condensate from the unit should be run to a suitable waste drain via a 22mm pipe.
It is necessary that a U-BEND TRAP be included in the pipe to prevent the suction effect of the fan in the
Heatstar unit from drawing the condensate water back into the unit. The trap should have a drop of at least
50mm.
The drain pipe must be installed to run downhill.
For ease of cleaning and maintenance, it is advised that the drain pipe is push fitted together and not glued.
Equally a short section of transparent pipe would assist is monitoring the condensate flow.
If the drain pipe or drain is positioned outside, care should be taken to ensure that it is not allowed to freeze.
If the Heatstar unit is positioned outside, it is possible to simply allow the condensate water to run out of the pipe
and onto the ground.
However, the use of a u-bend trap is still advised to form an air lock to help prevent the condensate from being
sucked back into the unit by the action of the fan.
It is not advisable to run the condensate water back to the swimming pool due to the possibility of a light oil
present on new components in the Heatstar unit polluting the pool water and staining the draining channel.
Under certain ambient air conditions, a limit amount of water may come from the bottom of the case of the
Heatstar unit.

14
PRINCIPLE OF CONTROL
CONTROL OPERATION :
The digital electronic thermostat control on the Heatstar unit is intended to automatically maintain the required
pool water temperature.
The thermostat measures the actual condition of the pool water as it is pumped through the Heatstar unit by the
pool filtration pump and automatically switches ‘ON or ‘OFF’heating accordingly.
The control operates on a simple ‘ON’or ‘OFF’principle.
Heating, for example, will either be ‘ON’, if the pool water temperature is colder than the control setting, or ‘OFF,
if the pool water temperature is warm enough.
The control setting simply tells the Heatstar unit what temperature you consider to be ‘warm enough’.
The heat output available from the Heatstar is a fixed quantity and setting a higher pool water temperature will
not serve to increase the amount of heat produced from the Heatstar unit at all.
The control is intended to be completely automatic and, once correctly set, it should not require any further
adjustment at all.
The temperature control normally displays the actual current temperature of the pool water.
To set the desired pool water temperature :
AQUARIUS MODELS 1,2,3 & 4 :
On the digital thermostat, press and hold the left hand button (with both up and down arrows), which will then
display the set point temperature.
To increase the set temperature, whilst still pressing the left hand button, press the button by the ‘up arrow’.
To decrease the set temperature, whilst still pressing the left hand button, press the button by the ‘down arrow’.
When the left hand button is released, the new set temperature is fixed and the thermostat reverts to displaying
the actual current pool water temperature.
The product will now continue to heat the pool water until your desired set temperature is achieved, when it will
automatically switch off.
If the pool water temperature drops below your desired set temperature, the heat pump will automatically switch
back on again.
‘PLUS’VERSIONS :
These versions also incorporate a direct electric resistance booster heater.
Press and release button ‘L1’to display the temperature set point for heat pump operation. To increase or
decrease the set point, simply use the up or down arrow buttons.
Press and release button ‘L2’to display the temperature set point for booster operation. To increase or decrease
the set point, simply use the up or down arrow buttons.
To achieve proper stage control, L2 would normally be set 2C below the setting for L1.
AQUARIUS MODELS 6,8 & 16 :
These models have twin heat pump circuits, which can be controlled independently.
Press and release button ‘L1’to display the temperature set point for heat pump circuit 1 operation. To increase

15
or decrease the set point, simply use the up or down arrow buttons.
Press and release button ‘L2’to display the temperature set point for heat pump circuit 2 operation. To increase
or decrease the set point, simply use the up or down arrow buttons.
To achieve proper stage control, circuit 2 would normally be set 1C below the setting for circuit 1.
It will take a very long time, as long as 24 hours, for the pool water temperature to rise or fall even one degree in
temperature. It is therefore very important not to change the temperature setting more than one degree per day,
otherwise the temperature balance may be lost.
ABOUT THE HEATSTAR CONTROL PANEL
‘POWER’NEON -
This neon, when lit, indicates that mains electricity is being supplied to the Heatstar unit.
‘POOL WATER FLOW CUT-OUT’NEON -
This neon, when lit, indicates insufficient pool water flow through the Heatstar unit. Should this light, please refer
to fault finding.
No pool water heating is possible until the pool water flow has been restored.
‘SYSTEM CUT-OUT’NEON -
This neon, when lit, indicates that the refrigeration system has Cut-Out due to either a high or low internal
refrigerant pressure.
Should this light, please refer to Fault finding. No pool water heating is possible until the cut-out has been re-set.
‘DE-FROST’NEON -
This neon, when lit, indicates that the Heatstar unit has sensed an excessive build up of ice on the cold
refrigerated air coil and is acting to regulate ice formation.
‘HEATING’NEON -
The neon, when lit, indicates that POOL WATER HEATING is switched ‘ON’to achieve the pool water
temperature setting.
AQUARIUS MODELS 6,8 & 16 :
These models have twin heat pump circuits, so there will be two neons for system cut-out, de-frost and heating,
one for each circuit.
‘Plus’Version with booster heater :
These models have two additional neons below the temperature control, one green and one red.
This green neon indicates when the booster heater is operating and the red neon indicates if the booster heater
has tripped out because of an unusually high temperature in the heater.
To re-set the trip, simply switch electricity off to the product and switch it back on again.
If the tripping persists, then consult Heatstar for advice.
Please note : All neon indicators will glow dimly even when they are not lit and this is quite normal.

16
PUTTING THE UNIT INTO COMMISSION
The Heatstar unit will start to function as soon as the mains electricity supply is connected.
The unit can only be properly operated when all the installation services are complete i.e. electrics, pool water
filtration pipe work etc.
The Heatstar unit cannot be started until the pool is full of water and the pool filtration circuit ready to operate.
Before connecting the mains electricity supply to the Heatstar unit, the following procedure should be followed :
CHECK ELECTRICAL SAFETY
- Check correct and good Earth connection.
- Check rating and operation of RCD and MCB breakers.
START UP POOL WATER FILTRATION PUMP
Connect mains electricity supply to the pool water filtration pump and leave running until the entire pool water
system is primed and all air has been expelled from the pipe work. This can take several minutes.
It may be necessary to bleed air from high points in the pool pipe circuit.
Check that there are no leaks within the pool water pipe circuit and that the pressure gauge on the pool water
filter is indicating normal pressure.
AIR INTAKE
Ensure that the fresh air intake on the Heatstar unit is not obstructed by leaves etc.
SETTING THE CONTROLS
Set the thermostat on the Heatstar unit to the desired pool water temperature.
ACCESS PANELS
Ensure that all access panels on the Heatstar unit are securely fastened in place.
SWITCH ON ELECTRICAL MAINS POWER TO HEATSTAR UNIT
On the Heatstar control panel, the ‘POWER’amber neon should be lit.
The supply fan will start immediately.
The heat pump circuit / heating neon will not switch on until a time delay of 6 minutes has passed.

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CHECKING THE INSTALLATION SERVICES
ELECTRICITY VOLTAGE SUPPLY :
The electrician should ensure that, with all equipment running, that the voltage supplied to the Heatstar unit falls
in line with the minimum requirements as listed under ‘Electrical Specifications’.
POOL WATER FLOW CUT-OUT TEST :
With the Heatstar unit running, switch off the electrical power supply to the pool water filtration pump.
On the Heatstar control panel, the 'POOL WATER FLOW CUT-OUT' red neon should now be lit.
If there is a head of water above the Heatstar unit, the flow sensor may require adjustment. Should this be the
case, please contact Heatstar for details.
After the test, switch the pool water filtration pump back on and, on the Heatstar control panel, the 'POOL
WATER FLOW CUT-OUT' red neon should now be off again.
CHEMICAL DOSING :
Check that all methods of chemical introduction are carried out after the flow of pool water has been through the
Heatstar unit.
If they are before the Heatstar unit in the line of flow, then serious damage may occur to the Heatstar unit.
This includes any slow dissolving tablets of ANY description.
The general chemical balance of the pool water should not exceed the indicated appropriate limits.
AIR FLOW :
Check that there is appreciable air flow from the air discharge vent on the Heatstar unit.
CONDENSATE WATER DRAINAGE :
If the Heatstar unit is located within a plant room, the small plastic drain out let on the base of the product must
be connected to a suitable waste drain.
The connecting pipe should contain a U-bend trap. If a trap is not fitted then the condensate will not be able to
drain away properly and may leak from the Heatstar unit.

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ABOUT THE WARMING UP PERIOD
Once the Heatstar unit is running the pool water will start to be heated.
To heat up water takes a lot of heat and a lot of time and a typical swimming pool contains many thousand
gallons of water.
To warm up all the swimming water to the required temperature will normally take from 10-14 days, assuming
appropriate weather conditions.
If the pool water heating control is switched ‘ON’, the temperature of the heated water coming back into the pool
will not necessarily feel any warmer.
This is because the pool water will only be increased very slightly in temperature on every re-circulation through
the filtration pipe work and the Heatstar unit and is quite normal.
It should be noted that, if the pool water heating is switched ‘OFF’, the pool water will take a similarly long time to
cool down.
During the initial warming of the pool water, the Heatstar unit together with the pool filtration pump will require to
operate continuously 24 hrs per day.
MAINTENANCE REQUIREMENT
To ensure that the Heatstar unit is operating to full efficiency, it is recommended that an inspection service is
carried out by suitable qualified personnel at regular intervals, typically every six months.
It is also recommended that the pool water filtration plant is also regularly serviced.
In addition to this, it is recommended that the following be periodically checked :
FRESH AIR INTAKE :
The fresh air grille can be removed for cleaning by removing the screws which hold the air intake grille in place.
If the air intake is allowed to become blocked, the airflow to the Heatstar unit will be restricted, resulting in
inefficient running or, in extreme cases, damage to the internal motors.
CONDENSATE WATER DRAIN PIPE :
Any dust etc. which may accumulate on the air heat exchange coils within the Heatstar unit may be washed
down into the condensate drain pipe.
If allowed to build up, such dust may cause a blockage in the pipe, resulting in over flowing of the condensate
water collection tray within the Heatstar unit.
Therefore the pipe should be periodically inspected to ensure that it is clear.

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ICING REGULATION
The Heatstar unit contains a large refrigeration circuit and the temperature of the cold refrigerated air coil is
maintained near to freezing to optimise heat absorption.
Therefore, ice is expected to form on the refrigerated air coil under certain conditions and this is perfectly normal.
Even when ice has formed on the refrigerated coil, the Heatstar unit is still able to function normally and continue
to heat the pool water.
However, if the ice formation is left unchecked, then the ice will eventually block the air path through the
refrigeratedcoil and this will impede effective operation.
During warmer weather, the coil temperature would normally be slightly above freezing and no icewill form. As
the air temperature becomes colder, then ice will start to form on the refrigerated coil.
If the pool water temperature is warm, then ice would not normally start to form on the refrigerated coil until the
air temperature falls to around 7ºC. However, if the pool water temperature is cold, then ice may be expected to
form at air temperatures notably higher than this figure.
Heatstar units are available with three alternative types of icing regulation :
SDF (SUMMER DE-FROST) VERSION :
With SDF models the refrigeration system is simply switched off when excessive ice has formed, automatically
switching back on again when the ice has naturally melted.
This is the most common type of icing control and is appropriate for the normal UK summer swimming season.
ADF (AUTUMN DE-FROST) VERSIONS :
With ADF models the heat generated from the heat pump system is diverted away from the pool water heating
coil and into the refrigerated air coil to actively melt away the excess ice.
WDF (WINTER DE-FROST) VERSIONS :
With RDF models the heat pump system reverses it’s action so that it takes heat from the pool water and
transfers it into the refrigerated air coil to actively melt away the excess ice.