13
START UP
e furnace should be operated for a minimum of 10 minutes to
reach steady state conditions before ne tuning combustion. e
warm up time is ideal for testing the oil pump pressure.
Drill a 1/4-inch test port in the venting between the furnace ue
outlet and dra regulator (barometric damper). Insert a stack ther-
mometer and note the ue gas temperature. e ue gases should
be within a range of 350°F to 450°F. If the ue gases are below the
range, it may be necessary to slow down the blower fan. If the ue
gases are above the range, the blower fan may require speeding up
or the barometric damper needs adjusting. Stack temperature varies
directly with the system temperature rise. System temperature rise is
the dierence between the furnace outlet temperature and furnace
inlet temperature as measured in the vicinity of the connection
between the plenum take-os and the trunk ducts. Temperature rise
value is listed on the system rating plate.
Perform a smoke spot test. e smoke spot should not exceed No. 1
on the Bacharach Scale.
Aer the air adjustments have been completed, re-check the dra
pressure at the test port on the burner mounting plate as shown in
Figure 2.
e dra should be adjusted to -0.02 inches w.c.
In the United States, the Beckett AF Burner may be equipped with
Beckett's "Inlet Air Shut-O" to increase eciency. (Beckett Part No.
AF/A 5861).
NOTICE
USE OF THE INLET AIR SHUT-OFF COULD CAUSE
POST COMBUSTION NOZZLE DRIP.
SPECIAL INSTRUCTIONS FOR UNITS EQUIPPED WITH RIELLO BURNERS
Riello burners are factory set with respect to nozzle size, pump pres-
sure, air gate and turbulator adjustments for each model and ring
rate; therefore, do not use the above listed set up procedures.
Riello specications are listed in
Table 3C,
page 11 of this manual
.
Consult the Riello Installation Instructions supplied with the Burner
for specic information concerning burner adjustments, operation,
and trouble-shooting.
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