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HX Pool and Spa Heater  

 

Page 4 

LIGHTING INSTRUCTIONS

 

For your safety – read before lighting 

This appliance is equipped with an ignition device which automatically lights the burner.  Do not 
try to light the burner by hand. 
 
BEFORE OPERATING smell all around the appliance area for gas.  Be sure to smell next to the 
floor because some gas is heavier than air and will settle on the floor. 
 
WHAT TO DO IF YOU SMELL GAS.  Do not try to light any appliance.  Do not touch any 
electrical switch.  Do not use any telephone in your building.  Immediately call your gas supplier 
from a neighbour’s house.  DO NOT STORE OR USE PETROL OR OTHER FLAMMABLE 
VAPOURS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. 

 

OPERATING INSTRUCTIONS 

1.

 

STOP!  Read the safety information above. 

2.

 

Turn off electric power to appliance. 

3.

 

This appliance is equipped with an ignition device which automatically lights the burner.  Do 
not try to light the burner by hand. 

4.

 

Wait five minutes to clear out any gas.  If you then smell gas, STOP!  Refer to instructions 
above. 

5.

 

Turn filtration pump on. 

6.

 

Turn on power to the heater and press the pool/spa button to select 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 instructions 5 to 7 above.  If the appliance still does 
not ignite, call your service technician. 

 

TO TURN GAS OFF TO APPLIANCE 

1.

 

Turn off all electrical power to the appliance. 

2.

 

Turn off gas tap in gas line prior to heater. 

 

CHEMICAL BALANCE 

It is imperative that correct chemical balance be maintained in your pool and spa water, otherwise 
corrosion of your heater may occur.  

Corrosion of the heat exchanger voids warranty.

  Your 

local pool shop specialist or spa retailer can advise correct chemical balance.  Your water should 
be checked and maintained regularly by a pool water professional.  As a guide the following 
parameters may be used. 

 

 

pH 

 7.6 to 7.8 

 

Total Alkalinity 

 80 to 120 ppm 

 

Calcium Hardness 

150 to 250 ppm 

 Salinity 

 

 

4000ppm 

max. 

Excessive 

salt can damage your heater. 

 

You should test your water chemical balance at least on a weekly basis. 

 

Excessive sanitiser can damage your heater.  Chlorine should not exceed 3 ppm and bromine 
should not exceed 5 ppm.  Salt chlorinators, especially when used on spa pools or indoor or 
covered pools, can easily produce excessive chlorine levels which will damage the heater 
internals. 

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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