![background image](http://html1.mh-extra.com/html/ibc/ex-series/ex-series_installation-and-operating-manual_3222196036.webp)
Combustion air from outdoors
Flue gas exhaust to outdoors
Boiler supply connection at rear of boiler
Boiler return connection at rear of boiler
Figure 23
Rear view - combustion air intake
Notes
When installing air intake piping, ensure that a "trap" is not formed in the piping
causing a build-up of water and blockage of intake air. Such blockages will
cause a boiler safety shut-down.
Filters require checking and cleaning or replacing on a regular schedule based
on the severity of the problem.
34
Section: Installation
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...