Dunkirk Q95M-200 Modulating Condensing Boiler - Manual (Page 11)

11
Pressure Guidelines
Fan Speed Minimum RPM Maximum RPM
Fuel Natural Gas LP Natural Gas LP
Gas Line Inlet
Pressure
N/A N/A At least 4” WC At least 10” WC
Differential Pres-
sure
0.3” WC 2.0” WC
Note: Differential pressure values listed for comparison only. These values will change with vent length
and altitude of installation.
Combustion Guidelines
Outside Natural Gas LP Gas
Temperature *%CO
2
*%O
2
CO *%CO2 *%O
2
CO
70°F and up 9.6% to
10%
3.9% to
3.2%
Less than
80 PPM
11.1% to
11.5%
4.1% to
3.4%
Less than
80 PPM 21°C and up
30°F to 70°F
9.3% to
9.6%
4.4% to
3.9%
Less than
80 PPM
10.8% to
11.1%
4.5% to
4.1%
Less than
80 PPM -1°C to 21°C
30°F and below
9.0% to
9.3%
5.0% to
4.4%
Less than
80 PPM
10.5% to
10.8%
4.9% to
4.5%
Less than
80 PPM -1°C and below
* Percent CO
2
values may exceed those listed and percent O
2
values may be less than those listed in order
to achieve nominal input rate of boiler.
Flame Signal Guidelines
Fan Speed Minimum RPM Maximum RPM
Flame Signal Greater than 3.0 VDC Greater than 3.0 VDC
6 - CHECKOUT PROCEDURES AND ADJUSTMENTS