4. Adjustment and Verification
Perform combustion test
COMBUSTION MUST BE VERIFIED WITH THE (OPTIONAL)
BURNER COVER IN PLACE —
Remove the burner cover if installed. Set up and adjust the
burner using the following procedure. Replace the burner cover,
allow the burner/appliance to run at least 15 minutes, then
check combustion again. Readjust the burner is necessary.
The CO
2
will increase when the cover is put on, particularly
if combustion air is piped to the burner.
If air is ducted to an (optional) air adapter, combustion must
be set based on the air inlet temperature. Air temperature
variations will change how much air enters the burner, so the
combustion must be set to anticipate the variations. Follow
the guidelines below.
Adjust burner using test instruments
1.
Operate burner for 15 minutes before making final adjustments using
test equipment.
2.
Check for leaks in fuel piping.
Inspect fuel piping system for leaks. Repair any leaks to avoid
fire hazard from oil leakage or combustion problems due to
air infiltration into oil.
3.
Inspect flame
• Look at flame through appliance combustion chamber observation
port. The flame should be well-defined and should not impinge on
any appliance surface. (If you make air or gas pressure changes
later, inspect the flame again.)
Do not attempt to confirm combustion simply by inspecting
the flame visually. You must use combustion test instruments.
Failure to properly verify/adjust combustion could allow unsafe
operation of the burner, resulting in severe personal injury,
death or substantial property damage.
4.
Insert test probe into vent to sample flue products.
Heating units designed for natural draft operation are normally
set for a slightly negative pressure, usually -0.01 to -0.02
inches w.c. draft at the combustion chamber test port. Ap-
pliances designed for forced draft (positive pressure in the
chamber) must be air-tight to prevent exfiltration of harmful
combustion products. Failure to properly set draft for the
appliance could result in severe personal injury or death.
5. Use combustion test equipment to verify that the burner is properly
set up for your installation.
Appliances with positive pressure in the
chamber may require a wider air opening. See appliance instructions
for details. Verify/adjust settings by testing with instruments.
• With the burner equipped with the correct positioning bar, oil nozzle
and initial air band setting, the flue products will usually contain
between 11½% and 12½% CO
2
(5.9% and 3.8% O
2
) and zero
smoke. (Based on air inlet temperature of 70°F — see Table 4
for the proper values at other air temperatures for burners with
ducted combustion air.)
• Depending on length of air piping (when used) and on air tempera-
ture, CO
2
may change one per cent or more with the cover in place.
• Check smoke. It should be zero on the Bacharach scale.
• Set the appliance flue damper or barometric draft regulator so the
draft or pressure in the vent complies with the appliance manu-
facturer’s instructions.
Re-install (optional) burner cover and check combustion again
1.
Allow the burner to operate with the cover on for at least 15 minutes.
(Insert a temperature probe to measure incoming combustion air
tempeature if combustion air is ducted to the burner.)
• Retest CO
2
(or O
2
) and smoke again. The values will change when
the cover is installed. Depending on length of air piping and on
air temperature, CO
2
may change one per cent or more with the
cover in place.
• Make sure the CO
2
(or O
2
) values are in the range given in Table 4
for the inlet air temperature measured. IF NOT, remove the cover
and adjust the air band more open to decrease CO
2
(increase O
2
)
or close the air band slightly to increase CO
2
(decrease O
2
).
• Tighten air band clamping screw.
All installations should be checked after one to two weeks of
operation to ensure the appliance/burner units are operating
correctly.
Table 4
Burners using inside air for combustion –
Use “65°F or higher” row in table below.
Burners with ducted combustion air –
MEASURE incoming combustion air temperature
and set the CO
2
(or O
2
) using the following chart:
Incoming combustion
air temperature
during setup
CO
2
min CO
2
max
O
2
max
O
2
min
–20°F to 0°F
10.2%
11.0%
7.0%
5.8%
5°F to 30°F
11.0%
11.5%
5.8%
5.5%
35°F to 60°F
11.5%
12.2%
5.5%
4.2%
65°F or higher
12.0%
12.5%
4.6%
3.9%
MN66-3P 090721
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Carlin Select EZ-66 Oil/Bio Fuel Burner Instruction Manual
