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HX Pool and Spa Heater  

 

Page 8 

MAINTENANCE 

 
It is recommended that you check the following at least every six months and at the beginning of 
every swimming season. 
 
1.

 

Examine the balanced flue or indoor draught diverter.  Make sure there are no obstructions to 
the flow of air to, or flue products from, the appliance. 

2.

 

Visually check the burner flames.  If the flame appears yellow, the burner should be cleaned 
by a qualified service technician. 

3.

 

Keep the heater area clear and free of combustibles and flammable liquids. Chlorine should 
not be stored in the vicinity of the heater.  Chlorine vapours, when drawn through a heater, can 
rapidly cause corrosion of the heat exchanger. 

4.

 

Keep the heater area free from garden refuse and debris.  This will help prevent insects nesting 
in the unit and ensure extended life and reliability of your heater. 

 
 

ENERGY SAVING TIPS 

 
1.

 

If possible, keep pool or spa covered when not in use.  This will not only cut heating costs, but 
will also keep dirt and debris from settling in the pool and conserve chemicals. 

2.

 

Reduce pool thermostat setting to 28

˚

C or lower.  This is accepted as a comfortable and 

healthy swimming temperature. 

3.

 

Use an accurate thermometer. 

4.

 

Set timeclock to start filtration and circulation system no earlier than daybreak.  The pool loses 
less heat at this time. 

5.

 

For pools that are only used on weekends, it is not necessary to leave the thermostat set at 
28

˚

C.  During the week, lower it by an amount that can easily be achieved in one day 

(generally 5

˚

C to 8

˚

C). 

6.

 

During the winter or while on vacation, turn the heater off. 

7.

 

Set up a regular program of preventative maintenance for the heater each new swimming 
season.  Check heat exchanger, controls, burner operation etc. 

 
 

WINTER OPERATION 

 
If the pool won’t be used for a month or more, turn the heater off at the main gas valve.  For areas 
where there is no danger of freezing, water should circulate through your heater all year long even 
though you are not heating your pool. 
 
Where freezing is possible, it is necessary to drain the water from the heater.  This may be done by 
loosening the inlet or outlet barrel union.  If the heater is below water level, isolate it from the pool 
first by closing shut off valves before and after the heater. 
 
 
CAUTION:  If the heater has been drained for freezing conditions, do not turn on until the system 
is circulating water. 

Summary of Contents for HX 120

Page 1: ...site www hurlcon com au Email service hurlcon com au Information and specifications subject to change without notice Victoria Ph 03 9765 9765 Fax 03 9764 9009 New South Wales Ph 02 9674 8544 Fax 02 96...

Page 2: ...nce Instructions 8 Energy saving Tips 8 Winter Operation 8 Installation Installation Instructions 9 Flow Rates 9 Water Connections 9 Plumbing Diagram 9 Heater Dimensions 10 Indoor Installation 10 Vent...

Page 3: ...nstructions local gas fitting regulations the AGA Installation Code AG 601 and any other relevant statutory authorities Refer to data plate for details of gas type gas consumption and burner pressure...

Page 4: ...ct pool or spa mode 7 Set thermostat to desired setting and the ON OFF switch to turn the heater ON 8 The heater will ignite in around 10 seconds 9 If the appliance will not operate follow instruction...

Page 5: ...cium hardness and temperature These measurements must be at the correct levels to maintain balanced water and effective sanitation of your pool Balanced water will help prevent corrosion of your heate...

Page 6: ...or two minutes after the set point has been reached If the time delay is activated the symbol L will be displayed This is part of normal operation The thermostat can be set to temperatures between 10...

Page 7: ...r greater than 0 C phone for at 0 C freeze conditions service F1 Thermostat reads greater Allow water to cool than 45 C turn heater off then on again F2 Mechanical Hi Limit greater Allow water to cool...

Page 8: ...8 C or lower This is accepted as a comfortable and healthy swimming temperature 3 Use an accurate thermometer 4 Set timeclock to start filtration and circulation system no earlier than daybreak The po...

Page 9: ...s are located on the right hand side of the heater Left hand connection models are available by special order The inlet and outlet are clearly marked Water connections require 40 mm PVC glue in plumbi...

Page 10: ...talling the heater indoors it is imperative that an adequate supply of fresh air is provided for combustion Failure to provide adequate ventilation voids all warranties and may be a danger to persons...

Page 11: ...l spa blowers in the same room as a gas heater This is potentially dangerous to spa users Do not store chemicals or fuel in the same room as the gas heater This may cause fire or explosion When instal...

Page 12: ...built in pressure regulator and pressure test point On starting the heater a manometer must be used and burner pressure checked against the heater data plate The gas valve regulator may need to be adj...

Page 13: ...isplay to indicate water flow 4 Set thermostat to ON and press the button repeatedly until set temperature is greater than water temperature Thermostat should now display 5 After a few seconds the bur...

Page 14: ...he nominal burner pressure listed below 7 To adjust gas valve regulator remove regulator adjustment cap and using a screwdriver turn plastic bush clockwise to increase anti clockwise to decrease burne...

Page 15: ...rner assembly and withdraw 8 Remove the four Phillips head screws securing the injector manifold to the burner tray 9 Remove burner injectors and replace with desired gas type injectors 10 Remove regu...

Page 16: ...played Refer to fault indication table HEATER SHORT CYCLING RAPID ON AND OFF OPERATION Possible cause Remedy Insufficient water flow Clean filter and pump strainer Defective wiring Repair or replace w...

Page 17: ...re Switch N O Hi Limit N C 45 Hi Limit N C 70 A N E Transformer Genus IV Thermostat Sensor 4 Pin Plug Ignitor Flame sensor Violet Brown Earth Post 6 Pin Plug Ignition Module Brown Green Yellow Orange...

Page 18: ...n and operating instructions The warranty shall not apply to any heaters or parts which have been subject to accident negligence alteration abuse or misuse Corrosion of the heat exchanger is caused by...

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