Lochinvar TTW Series Installation, Commissioning And Maintenance Instructions page 92

Figure 1:
Gas type G20
The CO level may never be in the hatched area.
2
Figure 2:
Propane G31:
The CO level may never be in the hatched area.
2
Figure 3:
B/P: propane/ butane mixture G30/ G31
The CO level may never be in the hatched area.
2
Check the setting of parameter P4BD (gas type)
0 = Standard gas; e.g.: Natural gas G20 or G25.3
1 = Propane G31
2 = Mixture of Butane/Propane, B/P (G30/G31)
Setting of the parameter is described 16.17.
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