158 RT-SVX36G-EN
Unit Start Up
4. Check the carbon dioxide levels after each adjustment.
5. Press the STOP key at the Human Interface Module in the unit control panel to stop the system
operation.
Table 52. Recommended manifold pressures and CO
2
levels during furnace operation (see notes)
Manifold
Furnace Stage MBH Firing Rate %CO
2
Pressure
High-Fire 235 100% 8.5 - 9.5 3.0 - 3.5
Low-Fire 117 50% 6.0 - 7.0 0.9
High-Fire 350 100% 8.5- 9.5 3.0 - 3.5
Low-Fire 175 50% 6.0 - 7.0 0.9
High-Fire 500 100% 8.5 - 9.5 3.0 - 3.5
Low-Fire 250 50% 6.0 - 7.0 1.25
High-Fire 850 100% 8.5 - 9.5 3.0 - 3.5
Low-Fire 500 50% 6.0 - 7.0 1.25
High-Fire 1000 100% 8.5 - 9.5 3.0 - 3.5
Low-Fire 500 50% 6.0 - 7.0 1.25
Note:
1. Manifold pressures are given in inches w.c.
2. High fire manifold pressure is adjustable on all heaters.
3. Low fire manifold pressure is non-adjustable on 235 MBH and 350 MBH heaters.
Figure 83. Flue gas carbon dioxide and oxygen measurements
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