11
V - CHECKOUT PROCEDURES AND ADjUSTMENTS
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
Flame Signal Guidelines
Fan speed
Minimum RPM
Maximum RPM
Flame Signal
greater than 3.0 VdC
N/A
