Figure 44
Fuel pipe assembly
5. Carefully lift off the fuel pipe assembly.
Figure 45
Removing the orifice
6. Remove the orifice.
7. Retain the two O-rings in the elbows for reassembly.
8. Install the kit-supplied orifice.
9. Secure the elbow with bolts on the gas valve side, ensuring that the O-ring is well seated
in the groove.
10. Secure the elbow with bolts on the mixer side, ensuring that the O-ring is well seated in
the groove.
11. Turn on the electric power and gas supply to the boiler.
12. Reset the gas low pressure switch by pressing the clear plastic cover above the Red
button.
13. Tune the gas valve. For instructions, see
Adjusting the gas valve (EX 400, EX 500) on
.
14. Check for gas leaks.
70
Section: Boiler operation
Summary of Contents for EX Series
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Page 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...
Page 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...
Page 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...
Page 124: ...Figure 76 Sequence of Operation 122 Section Appendices...
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Page 128: ...126 Boiler parts diagram EX 400 and EX 500...