3
e. Allow Boiler to operate for approximately 5 minutes before taking combustion readings. At both high and low fi re, CO
readings should be less than 200PPM air-free. Acceptable CO
2
and O
2
ranges are shown in Table 3.
Adjust the throttle at high fi re if fl ue gases are not in range:
• To reduce the CO
2
(increase the O
2
), turn throttle clockwise.
• To increase the CO
2
(reduce the O
2
), turn throttle counter-clockwise.
Make adjustments in increments of 1/8 to 1/4 turn and allow Boiler at least a minute to respond to each adjustment before
making another. The CO level will be at its lowest somewhere in the CO
2
range shown in Table 3. Consult factory if it is
not possible to reduce CO level below 200PPM air free within the range of CO
2
shown for the fuel and altitude at which
the Boiler is being used. Final readings should be taken with all doors and covers in place.
6. Cycle Boiler at least fi ve times at the fi nal throttle setting to ensure burner ignites without delay and without noise.
7. Follow all instructions in Section XI (Start-up and Check-out) from Steps 17 to 20.
8. A sheet of yellow labels is provided in the Instructions Packet supplied with the boiler for boilers converted from natural
to LP gas. Select the model from this sheet of labels and apply them as follows:
a. Apply the “Rating Plate Label” adjacent to the rating plate.
b. Apply the “Gas Valve Label” to a conspicuous area on the gas valve.
c. Apply the “Boiler Conversion Label” to a conspicuous surface on, or adjacent to, the outer boiler jacket. Fill in
the date of the conversion and the name and address of the company making the conversion with a permanent marker.
9. Apply the “High Altitude Installation Label for Canadian Installations” adjacent to the Rating Plate Label, if applicable.
This label is provided in the Instructions Packet supplied with the boiler.
Figure 1a: Gas Valve Detail (80MBH Thru 120MBH)