3. Recheck draft and take a CO
2
reading over the fire
and in the stack. If a large differential between CO
2
readings is noted, air leakage is the most common
cause. CO
2
readings must be taken ahead of draft
regulator, if used. The CO
2
measured in the stack
should be at least 9% for oil rates of 1.00 GPH or
below, and at least 10% for oil rates over 1.00 GPH.
4. Units should be started and stopped several times to
ensure good operation.
5. Open the inspection door, turn off the valve, and
check out the safety timing of the oil primary.
6. Check the operation of limit controls and thermostat.
7. Check for oil leaks.
All new installations should be
re-inspected after one or two
weeks of normal operation.
SETTING COMBUSTION EFFICIENCY
1. Selecting firing rate desired.
2. Install proper nozzle for appliance (see page 9 under
“Nozzle Selection”).
3. Install proper baffle and make gun adjustments per
firing rate (see Table 2 and Figure 12, page 7).
4. Fire burner, adjust combustion damper for yellow tips
above combustion chamber.
5. Record CO
2
and smoke. If CO
2
is low, adjust gun
setting back 1/32” and repeat CO
2
and smoke test.
Continue this adjustment until optimal CO
2
and smoke
is obtained. Record stack temperature.
6. Check lighting with cold and hot chamber.
7. Lock all adjustment screws, combustion damper
indicator, and gun setting stop and adjusting plate.
FINAL CHECKS
Be sure all screws are locked, and the controls on the
heating unit are adjusted in accordance with the
manufacturer’s instruction sheets.
Table 3: Efficiency Chart For No. 2 Fuel Oil
NET STACK TEMPERATURE (°F)
300° 350° 400° 450° 500° 550° 600° 650° 700° 750° 800° 850° 900°
CO
2
15 87½ 86½ 85¼ 84¼ 83¼ 82 81 79¾ 78¾ 77½ 76½ 75½ 74¼
87½ 86¼ 85 84 83 81¾ 80¾ 79¼ 78½ 77¼ 76 75 73¾
14 87¼ 86 84¾ 82¾ 82¾ 81½ 80¼ 79 78 76¾ 75½ 74½ 73
87 85¾ 84½ 83½ 82½ 81¼ 80 78¾ 77½ 76¼ 75¼ 74 72¼
13 86¾ 85½ 84¼ 83¼ 82 80¾ 79½ 78¼ 77 75¾ 74½ 73½ 71¾
86½ 85¼ 84 83¼ 81½ 80¼ 79 77¾ 76½ 75¼ 73¾ 72¾ 71
12 86¼ 85 83¾ 82½ 81¼ 79¾ 78½ 77¼ 75¾ 74½ 73 71½ 70¼
86 84¾ 83½ 82 80¾ 79¼ 78 76½ 75¼ 73¾ 72¼ 70¾ 69½
11 85¾ 84½ 83 81½ 80¼ 78¾ 77¼ 75¾ 74½ 73 71½ 70 68½
85½ 84 82½ 81 79½ 78 76½ 75 73¾ 72 70½ 69 67½
10 85 83½ 82 80½ 78¾ 77¼ 75¾ 74¼ 72¾ 71 69½ 68 66¼
84½ 83 81½ 79¾ 78 76½ 75 73¼ 71¾ 70 68¼ 66¾ 65
9 84 82¼ 80¾ 79 77¼ 75¾ 74 72¼ 70¾ 68¾ 67 65¼ 63½
83½ 81¾ 80 78¼ 76½ 74¾ 73 71¼ 69½ 67½ 65½ 63¾ 62
8 83 81 79¼ 77½ 75½ 73¾ 71¾ 70 68 66 64 62 60
82¼ 80¼ 78½ 76½ 74½ 72½ 70½ 68½ 66½ 64¼ 62¼ 60 58
7 81½ 79½ 77¼ 75¼ 73¼ 71 69 67 64¾ 62½ 60¼ 57¾ 55½
80¾ 78½ 76¼ 74 71¾ 69½ 67¼ 65 62¾ 60¼ 57¾ 55½ 53
6 79¾ 77¼ 75 72½ 70 67¾ 65¼ 62¾ 60¼ 57½ 55½ 52½ 50
78½ 76 73½ 71 68 65½ 63 60¼ 57½ 54½ 51¾ 49 46½
5 77¼ 74½ 71¾ 69 65¾ 63 60 57 54 51 48 45½ 42½
75½ 72½ 69 66¼ 63 60 56¾ 53½ 50¼ 47 43½ 40¼ 36¾
4 73¼ 69¾ 66¼ 62¾ 59¼ 55¾ 52 48½ 45 41¼ 37½ 33¾ 30
8