MX Pool and Spa Heater Page 16
GAS CONVERSION
BURNER CONVERSION
1. Turn off gas supply to unit.
2. Turn off power supply to pump and heater.
3. Remove front access panel.
4. Disconnect gas supply from gas valve.
5. Remove the two Phillips head screws from the angle brackets at the end of the manifold
tube securing burner assembly to combustion chamber.
6. Disconnect wiring from gas valve and slide complete burner tray out through the access
opening.
7. Remove the four s/s bolts securing the injector manifold to the burner tray.
8. Remove burner injectors and replace with desired gas type injectors and new washers.
Tighten injectors using a torque wrench set at 26Nm.
9. Remove pilot burner and change pilot injector to desired gas type.
10. Remove regulator screw cap from top of gas valve
11. Turn plastic plug anti-clockwise until fully removed and withdraw spring.
12. Insert spring for desired gas type and re-install plastic plug.
13. Re-install burner assembly and reconnect gas supply.
14. Check gas system for leaks.
15. Commence lighting procedure as described above.
16. Adjust burner pressure as described above.
MX 125 MX 150 MX 200 MX 250 MX 300 MX 400
GAS TYPE INJECTOR SIZE BURNER PRESSURE PILOT
INJECTOR
NATURAL 3.3 mm
(3.4mm – MX125)
0.82 kPa
(0.75 kPa MX 400)
N18 (Silver)
PROPANE 1.9 mm 2.50 kPa N10 (black)
ULPG 1.9 mm 2.00 kPa N10 (black)
MX 500
GAS TYPE INJECTOR SIZE BURNER
PRESSURE
PILOT
INJECTOR
NATURAL 3.3 mm 0.78 kPa 1.00 mm
PROPANE 1.9 mm 2.50 kPa 0.80 mm
ULPG 1.9 mm 2.00 kPa 0.80 mm
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