6.3.2.2 Performing a fuel conversion on EX 700 and EX 850 appliances
1. Turn off the power and shut off the gas supply at the external gas shut-off valve.
2. Remove the front door and top cover from the boiler.
3. Remove the four (4) 5/16" hex bolts from the gas inlet to the mixing device. Carefully
separate the two parts, remove and retain the O-ring for re-assembly. (See
in image
below).
Figure 46
Disconnecting the mixing device
4. Remove the four (4) ¼" hex bolts that connect the mixing device to the air filter box. The
gasket should remain attached to the air filter box. (See
on image above).
5. Use an Allen key to remove the Six (6) 6 mm screws connecting the mixing device to the
fan. (See
in image above). Carefully separate the two parts, remove and retain the O-
ring for re-assembly.
6. Remove the propane mixing device.
7. When Installing the new natural gas mixing device ensure that the O-ring is properly seated
in the groove of the fan.
Caution
Failure to position the O-ring as indicated will result in a gas leak, and affect
burner operation.
8. Re-assemble in the reverse order of steps provided.
9. Turn on the electric power and gas supply to the boiler.
10. Reset the gas low pressure switch by pressing the clear plastic cover above the Red
button.
71
6.3.2 Performing a fuel conversion
Содержание EX Series
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Страница 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...
Страница 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...
Страница 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...
Страница 124: ...Figure 76 Sequence of Operation 122 Section Appendices...
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Страница 128: ...126 Boiler parts diagram EX 400 and EX 500...
Страница 132: ...130 Boiler parts diagram EX 700 and EX 850...