Bradford White 30S Installation & Operating Instruction Manual page 14

T'stat information Continued-
the cad cell will cause the relay to cut off for protection. It may then be
necessary to push the reset button on the burner on the burner module.
DO NOT ATTEMPT TO START THE BURNER WHEN
EXCESS OIL HAS ACCUMULATED, WHEN THE UNIT IS FULL
OF VAPOR, OR WHEN THE COMBUSTON CHAMBER IS HOT.
TUNE-UP PROCEDURE
A. To Put The Burner in Operation: Remove the temporary oil connection
previously used and install a pressure gauge. Set all the controls to the
normal starting position. Close the main cut out switch. The burner should
start, ignite and burn. After you have obtained a flame, the oil pressure
should be checked and adjusted to a pressure of 100 psi. This is the
normal operating pressure. The air inlet can then be adjusted so that the
flame is a clean yellow with slightly smoky tips. The burner flame can be
observed through the peep site hole. It may be necessary to readjust the
air inlet after the burner is running twenty minutes or more in order to
obtain the proper fire with a hot combustion chamber. After final
adjustment, tighten lock screws on air inlet, let unit cool and restart burner
to be sure burner operates on a cold start. Remove the pressure gauge
and install pipe plug.
B. Using Instruments To Set Fire: It is strongly suggested that the installer
use combustion test instruments when adjusting a flame. We suggest 9
1/2% to 11% CO2 with a smoke reading no darker than 1 on the Bachrach
Scale. Adjust the air inlet on the burner for the minimum amount of air for
clean combustion while the combustion chamber is hot. Adjust the draft
regulator so that there is -.01" to -.04" draft over the fire, maximum. Take
readings and adjust air so that a minimum of 9 1/2% CO2 is obtained with
a smoke reading between 0 and 1. When using instruments in setting a
fire, do not lean towards getting a greater percentage of CO2 than a clean
fire will give. It is more important to keep the inside of the combustion
system clean than to receive a higher CO2.
C. Nozzle (Oil Input) Variations: Oil service personnel will carry several
nozzles of different manufacture, angles and types of spray in order to
obtain the most suitable for the particular application. Fuel oils vary greatly.
Because of this, nozzles will not always deliver the gallons per hour or
angle of spray that is indicated on the nozzle. In addition, it has been found
that, in certain areas, due to local conditions, nozzles other than those
furnished as original equipment, give better performance due to the type of
oil being delivered.
D. Draft: Draft reading in the stack should be -.02" to -.05". High Draft may be
caused by over firing or too much excess air.
WARNING
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