Aquacal LTP0024 User's Manual
Contents
1. 024 AquaCal Pool Spa Heat Pump JA Owner and installation Manual CONTENTS LOCATING THE UNIT 2 VI CONTROL DEVICES 6 ELECTRICAL WIRING 2 VII STARTUP amp BALANCE wen Il POOL WATER PIPING 3 HX HEATER HUN TIME 3 IV HEAT SOURCE WATER 4 HEATER SHUTDOWN 9 V EQUIPMENT OPTIONS 5 X TROUBLE SHOOTING 10 INTRODUCTION The Water Source swimming pool and spa The Water Source uses a refrigerant vapor heat pump utilizes water as the heat source compression cycle to extract free heat from rather than air The practical recovery of heat one location the source water and delivers it stored in lakes canals oceans wells cool to another the pool You pay only for the ing towers or other viable heat resources isa electricity to accomplish the heat transfer cost effective method of conserving energy The Waters Source uses two heat exchangers The Waters Source swimming pool spa heat and makes two heat transfers One captures pump will provide many years of trouble free heat from the source water and the other service because of it s design transfers heat enhanced by the compressor to the pool water non corrosive casing protects compon ents from corrosion Heat exchangers area tube within a tube he aluminum chassis will not rust Water flows within an inner tube as the The insulated evaporator2. air into the vaporator oxide corrosion Too large a pump uses more power than is needed B 1 Multi duty for irrigation or heat ing is discouraged The water pump may be over sized relative to the pool heat pump a An existing well dedicated to another purpose can be used by installing another pump dedicated to poo use Simply tee into the well below the existing pump and pipe to the poo heat pump NOTE Each pump will need it s own check valve Check operation and water volume with both pumps running An inter lock relay may be required to lock outthe low priority pump when the higher priority pump comes on AquaCal Inc St Petersburg FL 4 NOTE SEA WATER APPLICATIONS Salt water applications should utilize copper heat source piping to prevent internal marine growth WATER SOLIRCE Pool HeatPump SURFACE WATER SOURCE SIDE SCHEMATIC check vaie Sta Hite KG142 Titer 1 isolation valve Warm Source Water pesca pi imc esca oe OUS check valve hose bibb isolation valve Cold Discharge Water surface water return far possible irom 18 na below low tide WATER SOURGE Pool Heat Pumpi GROUND WATER SCHEMATIC A thermometer pressure gauge WS Series May 1994 EQUIPMENT OPTIONS A heat pump can be equipped with one or more available accessories or owners may require changes in the future
3. the pool in the summer 1 Turn off power to the heater 2 If the source pump is dedicated to the pool heater not for irrigation the power should be turned off the source water is salty remove the inlet pipe and screen from the water to prevent acceler ated marine growth in and outside the pipe caused by stagnant water In northern regions winter shutdown is the same as for summer with one added requirement 1 Protect the unit pool piping from freeze damage a All outdoor piping should be in stalled to allow drainage but pool equipment and piping can trap water They must be drained and blown out with air pressura 2 An unseasonable sudden freeze will not be severe enough to cause dam age but keep both pumps running to prevent any freeze damage 3 Power failures in freezing weather necessitates immediate draining AquaCal Inc St Petersburg FL 9 WS Series May 1994 lviH ON SNINNIS Bolo ous HOSS3HZdAOS ala ICE D AV ids INGO E cui S3H2OLMS INVHSSIS einssEa2jd WOGEDM ONINNNY ION LINK F NOLLIGNO S3HD5SdHd INVH3OINITE fenenby Aq CT OI Bus z z 2 PE O XJ C T DONLLOGOHSITIH1O0NL LIMITED WARRANTY POOL HEAT PUMPS by AquaCal Water Source Pool Heat Pumps are warranted from the date of original purchase t
4. 230 volt 60 Hz 1 phase models through 10 horsepower using 1 or 2 compressors Common in North America 208 230 volt 60 Hz 3 phase models through 10 horsepower using 1 or 2 compressors Common in North America 380 volt 50 Hz phase _ models through 10 horsepower using 1 or 2 compressors Common in Europe 460 volt 60 Hz 3 phase models from 5 to 10 horsepower using 1 or 2 compressors Common in North America IMPORTANT Tor protect age against mixed pl JUN ng make sure all power wires are matched Teen properly i e Supply L1 to Contactor L1 L2 to L2 and L3 to L3 AquaCallac St Petersburg FL 2 See the cover or electrical panel name plate for minimum circuit ampacity and and maximum fuse size The Power Wiring box for connection to supply power is located on the side of the Control Panel at chassis front The Control Wiring box for connection of control wiring is located on the side the Control Panel at the chassis front The Grounding Lug bonding lug is located in an Electrical Panel and must be used to ground the unit as a safety precaution against electrical shock All wiring must be a copper conductor only and must comply to the National Electrical Codes including Articles 680 and 440 NFPA 70 latest edition and all state and local codes pn ee WS Series May 1994 Piping for connection to the WATER SOURCE heater
5. A POOL PUMP INTERLOCK RELAY The heater should operate only with adequate water flow thru the heat exchanger The unit control is inter locked electrically to the pool pump See Sec AS power energizes the pool pump circuit breakers switches and timer contacts closed power simultane ously applies to a pool pump interlock relay coil The relay closes complet ing the 24 volt circuit through the pool thermostat high pressure switch low pressure switch and time delay relay contacts to energize a 24v compress or contactor NOTE A 24 volt source water pump Starter Coil or solenoid valve is wired before the compressor time delay re lay to permit source water flow thru the heat exchanger before the com pressor starts B PUMP STARTER or IRRIGATION BYPASS SWITCH For directly activated source water pumps see 4A1 The Pump Starter With an Irrigation Bypass is normally tor fresh and salt water source appli cations as service convenience in pump priming or coil clearing The Pump Starter consists of a rain tight enclosure containing a 24 volt controlled relay contactor with an AquaCal Inc St Petersburg FL CAUTION Over ride toggle switch The 24 volt pump starter relay is wired in paralel with a 24 volt compressor contactor and a toggle switch wired to jump the starter contacts With the toggle switch in the on position the source water pump runs conti
6. ches and the senses refrigerant suction pressure wired to shunt all three switches and opens contacts if pressures are If any pressure switch opens for any toa low reason control power stops bypassing the lock out relay coil the coil energizes E POOL SPA THERMOSTAT and the normally closed contacts open PURPOSE Maintains water at the tolock outthe controls even after the desired set point pressures return to normal LOCATION Top of Electrical Control After the pressure switches close the Panel under cover lock out relay can be reset by moment The thermostat is adjustable over a arily de energizing the control pawer at wide temperature range with a fixed the service disconnect switch Sec Il differential of 1 F AquaCal Inc St Petersburg FL 6 WS Series May 1994 CONTROL DEVICES cont HARD START KIT F THERMAL EXPANSION VALVE PURPOSE Meters refrigerant flow to the evaporator LOCATION Brazed in the refrigerant line between the condenser and the evaporator with a sensing bulb fixed to the suction line The thermostatic expansion valve I AV provides efficient flow control refrigerant over a wide range of conditions The adjustable is factory pre set for 10 F superheat CAUTION TXV adjustment must be performed by a qualified serviceman G COPPER FILTER DRYER PURPOSE To capture and hold any particles harmful to the compressor or TXV a
7. nd hold any unwanted moistura in it s dessicant LOCATION Brazed into the refrigerant line between the receiver and TXV LIQUID LINE RECEIVER PUHOSE To increase the resevoir of refrigerant available to the TXV for more efficient operation in a broader range of conditions LOCATION Brazed into the refrigerant immediately after the condenser AquaCal Inc St Petersburg FL 7 PURPOSE To provide added starting torque for the compressor at start up LOCATION In Electrical Control Panel All models are euipped with thermal pansion valves and these Hard Start components a potential relay and start capacitor A thermostatic expansion valve does not stay open during the off cycle to allow suction and discharge pressures to equalize quickly com pressor mustrestart under high press ure unless has been off for longed period of time On the initial compressor start a high inrush of current causes an induced voltage transformer action higher than normal to be applied to the start wind ings and the start relay coil wired in Paralle The relay contacts close placing the start capacitor across a run capacitor for an instant until the pressor gains speed The induced voltage then drops de energizing the start capacitor fram the circuit This also prevents the dimming of lights and the nuisance tripping of the circuit breaker in power fluctuations WS Series Ma
8. nously If the discharge line ball valve is closed to force all the water through hose bibb remember to open the ball valve before closing the hose bibb POOL SPA KIT Dual T stat Available only for residential pool spa combinations with a common filter and sharing a single heater Two thermostats save re adjustment for each spa use The Pool Spa Kit factory or field in stalled is an added thermostat with a remote pool spa toggle switch located customer convenience AUTOMATIC SPA ISOLATION WITH MOTORIZED VALVES Motor actuated isolating valves can be used with Pool and Spa Controllers on residential pools with common filtration One controller is for toggle switch in tiated change over and the other is fora time clock initiated over NOTATION For automatic control of a pool and spa with separate filtration use a dual heat exchanger model The pool and spa water remain isolated This will avoid spa drain down during a valve actuation Consult factory WS Series May 1994 EQUIPMENT OPTIONS cont E HEATnCOOL freshing in water temperatures below 85 A factory installed refrigerant reversing degrees valve permits cooling in the summer With the HEATnCOQOL option to change With air temperatures in the 60 s or 70 s to cooling select cool on the toggle a comfortable water temperature for switch and re adjust the thermostat if swimming
9. o balance water flow thru the heater to fine tune at start up Also for isolation requirements of codes ee in the pool piping after a balancing valve connects the heater s water out to the pool return piping PURPOSE Heated pool water return not to scale WATER SOURCE Poo Heat Pump POOL SIDE OUT IN Source Side B JV Thermometer E Isolation valve Thermometer Isolation valve Check CG 0102 POOL WATER SCHEMATIC to ool return 23 WS Series 1994 AquaCal Inc St Petersburg FL IV HEAT SOURCE WATER A Surface water heat sources include bays lakes rivers or oceans fresn or salt water A pump ts required to bring the water to the heat pump 1 The source water pump can be interlocked with the pump starter ar 2 Activated with a water solenoid valve and a pump pressure switch NOTE If a pressure system is used with surface water a pump suction screen that is cleanable in addition to a main inlet strainer is vital 3 An inlet sereen must be positioned high enough above the bottom to prevent pumping mud and low enough to be safe from low tides and boat wakes A well is a Ground Water heat source Sizing a ground source water pump is critical Efficient heater operation re quires adequate water 24 hours a day during severe heating periods Too little water means less heat efficiency and the potential of introducirig
10. o be free of material and craftsmanship defects The Warranty includes Defective parts and service labor are warranted for one 1 year The compressor only not labor is warranted for five 5 years This Warranty does not include repair damage due to Neglect abuse improper operation improper chemical levels or freeze damage Improper installation incidental or consequential damages of a failure Expendable materials refrigerant and freight are excluded from the warranty This Warranty does not include warranty services Le Inspection maintenance or unnecessary service calls due to Blectrical services external valve positions auxillary support equipment er roneous operational reports improper operation or installation p This Warranty is in lieu of all other warranties expressed or implied i AquaCal assumes no other liabilities _FOR YOUR RECORDS _ Model Seral No install Date For factory warranty service call 813 823 5642 Installer Manufacturer address AquaCal Inc C Si zip 2737 24th Street North Phone ot Petersburg FL 33713
11. or therapy ranges from 80 F necessary The selector switch is norm to 85 F However with air temperatures ally mounted on the chassis under the in the 80 s or 90 s swimming is truly re cover or in a remote location Vi CONTROL DEVICES A TIME DELAY RELAY CAUTION Resetonly onceor twice PURPOSE Protects the compressor ihen locate the cause of the problem from low voltage brown outs and power interruptions HIGH PRESSURE SWITCH LOCATION Inside the Control Panel PURPOSE To provide protection The adjustable delay on make solid from low water flow rates refrigerant state time delay relay has an adjustable over charge and excessive wate range of 6 seconds to 8 minutes and is temperatures factory pre set at minutes LOCATION Brazed into refrigerant NOTE The time Delay is wired to delay discharge line only the compressor to permit source senses refrigerant discharge water flow thru the heat pump before the sures and opens the contacts if the compressor starts pressures become excessive B LOCK OUT RESET RELAY D LOW PRESSURE SWITCH PURPOSE Prevents the compressor from short cycling LOCATION Inside the Control Panel PURPOSE To provide protection from low source water flow low refrigerant charge and freezing The lock out relay is normally closed LOCATION Brazed into refrigerant with it s contacts in series with high suction line and low pressure swit
12. prevents conden pressor circulates vaporized refrigerant within sate from forming inside the unit asurrounding tube flowing counter to the Acrylic paint resists aggressive salt air in pool water flow Heat is conducted through coastal climates the cupro nickel inner tube designed to A Scroll compressor highly efficient and withstand fresh salty or chemically treated reliable with low sound levels pool or spa water AquaCal Inc St Petersburg FL t WS Series May 1994 640 WLAN 0594 LOCATING THE UNIT if ihe heat pump is installed outdoors Mount on a pre cast concrete near the pool filter and pump The unit may be installed inside an equipment room since it does not require outside air Make certain the unitis not set on a base that joins a building found ation sound abatement f necessary rubber isolation pads may be placed under each corner of the heat pump ELECTRICAL WIRING The one piece cover lifts up and off the chassis for access to piping and elect rical components during installation or Service Allow adequate clearance above and around the unit to permit re moval and access to the control panels on the front side of the chassis The unit should be located least 18 from any wall to permit connecting of rear piping and the electrical connections Heat pumps are available in several line voltages 208
13. s should be stabilized enough to make the final adjustments 1 Adjust the pool water diversion valve for a S F temperature differential be tween entering pool water and exiting pool water NOTE Closing valve decreases TD Opening valve increases TD 2 Slowly close ball valve in heater return line until the TD reaches 10 F 3 Adjust Source water flow a Slowly close the ball valve in the source pump suction line if used toa F TD between source water in and water out b Slowly close the ball valve in the source return line from the evapor ator until the TD reaches 8 F NOTE Temperature Differentials of sur face source water will vary depend ing upon source water temperature E Refrigerant System Check List With the water flows adjusted for proper temperature rise and drop thru the heat exchangers check for these proofs cold refrigerant suction line should have moisture on it outside the in sulation at the compressor A ring of moisture on the compressor fitting 3 to 4 diameter depending the temperature and humidity The sight glass should be free of any bubbles indicating a proper charge A mositure indicator in the sight glass should show dry without moisture CAUTION A HEAT PUMP IS A HIGHLY PRESSURIZED SYSTEM AND MUST BE SERVICED ONLY BY QUALIFIED TECHNICIANS WS Series May 1994 MX HEATER HUN TIME Your Water Source pool heat p
14. should be in Schedule 40 PVC or a material acceptable to the local code authority Metal heat sinks are not required A The heat pump unit requires only a portion of the water normally cireu lated by the pool filter pump Some pool water must bypass to ihe heat pump for heating then re turn to the pool piping To build an automatic bypass install 1 Tee from the pool piping prior to the heat pump PURPOSE To direct water to the heat pump 2 to automatic bypass valve to Stablize flow in all filter conditions Use 7 13 pound spring check valve 3 Ball valve at heater inlet PURPOSE Isolation and balancing at start up Throttle valve for tun ing water flow 4 Thermometer tee and well at the heater s entry PURPOSE For visual monitoring of the real pool temperature at the water inlet POOL PIPING 5 Diversion valve between tees in the pool piping ball or butterfly valve PURPOSE Ta force water to the heater NOTE To balance a bypass system a valve must be used between the two tees in the pool piping CHECK FLOW REQUIREMENTS OF MODEL IN SPECIFICATION SHEET 6 Thermometer tee and well at heater s exit PURPOSE Fora visual comparison to the heated water temperature for fine tuning of AT by balancing valve position at final test See Startup amp Balancing Sec Vil 7 Tee from automatic bypass check valve 8 Balancing valve at heater s exit PURPOSE T
15. ump has been sized and selected to your pool by a competent and knowledgable dealer You should already be aware of it s lim itations and capabilities The heater is designed to maintain pools about 20 to 25 F above the average air femperature This allows for recovery from the effects of changing weather Pool temperatures are more stable than alr and will follow average air tempera tures by about 48 hours When a weather front with new average air temperatures is established and holds for more than 48 hours the poo temperature will balance at 20 to 25 F above the new average air This is true with cool or warm air changes a pool temperature follows air temperatures up and down The weather normally will change often enough for the heater to bridge the gaps but during extended cold spells a pool may not be as warm as itis normally The pool heater ts designed to restore a typical heat loss from the previous night and a little more to raise the pool temp erature higher than yestersay A pool heater will run continuously on a cold during extreme weather con ditions However once the desired pool temperature is attained the unit will cycle for fewer hours Whether your heater was sized for use with a bianket or not a blanket helps in heating a pool rapidly eer SSS is SEASONAL SHUTDOWNS B WINTER SHUTDOWN A SUMMER SHUTDOWN If the heat pump will not be used to cool
16. y 1994 STARTUP amp BALANCE A The heat pump was charged with the proper amount of refrigerant and run tested at the factory prior to shipping tothe dealer However it is good practice to inspect the unit at startup 1 Refrigerant lines should not rub or touch other components 2 Look for oil spots that would in dicate refrigerant loss All piping clamps shoul be tight 4 Check for loose electrical terminal wires 5 he ground wire mustbe secure in the ground lug inside the heat pump s main control panel 5 Wiring is tight inside the building s service panel B With power to the heat pump 1 Turn the water thermostat to it s lowest setting 2 Tum on the pool pump 3 After the pool water is flowing in a satisfactory manner a Close the diversion valve half way 45 angle b Note entry water temperature 4 Tum up the thermostat slowly to a click that will eventually bring on the compressor The thermo stat should click at about the entering water temperature A small variation is not unusual a The source water pump will cycle on first D After a three minute delay the the heat pump will start C With the heater running check the source water pump operation 1 Adequate flow 2 Short cycling Make rough adjustments at this time It requires more running before final AquaCal Inc St Petersburg FL 8 D After 5 minutes the water and refriger antflow
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