Instruction Manual

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