Operating instructions

PROCEDURE 6—FINAL BURNER ADJUSTMENTS
A final adjustment must be made with the use of a COMBUSTION TEST KIT. Initial settings for burner are shown on label on top of ignition
transformer. Set burner accordingly. After operating 10 minutes to warm unit up, a smoke tester should be used to take a smoke reading in flue
pipe between boiler and draft regulator. Smoke should be zero (Shell Bacharach Scale). At times a new boiler requires more time than this to burn
clean due to oil film on a new heat exchanger. Check draft over the fire. This should be -0.01 to -0.02 in. wc as previously stated. Adjust draft
if necessary. Gradually close air shutter, and if necessary the air band, to obtain a smoke reading showing a trace of smoke. Measure CO
2
at this
point. Increase air sufficiently to reduce CO
2
by 0.5 to 1 percent as an insurance margin. Smoke should be zero. If a clean fire cannot be obtained,
it will be necessary to verify head and electrode alignment. (See Fig. 17–19.) If fire is still smoky, replace nozzle with a correct replacement.
Record nozzle size, oil pressure, combustion readings and air settings then place a tag or label on boiler or burner with this information. Units
should be cycled several times to assure good operation with no fluttering or rumbling. Check for oil leaks.
PROCEDURE 7—OIL BURNER MAINTENANCE
The following preventative maintenance items should be performed annually, preferably prior to the heating season.
A. OIL BURNER MOTOR
Add 2-3 drops of non-detergent electric motor oil to each oil cup located at front and rear of motor. Excessive oiling will shorten the life expectancy
of motor.
B. FUEL FILTER
This should be replaced so as to prevent contaminated fuel from reaching the nozzle. A partially blocked fuel filter can cause premature failure
of fuel pump unit.
C. FUEL PUMP UNIT
Replace pump screen and clean pump unit to maintain reliable fuel delivery to nozzle.
D. IGNITION ELECTRODES
Clean and adjust as per manufacturer’s recommendations so as to maintain reliable ignition of oil.
E. NOZZLE
Replace so as to maintain safe and reliable combustion efficiency. Always replace with the exact nozzle as required in Table 6.
F. FAN AND BLOWER HOUSING
These must be kept clean and free of dirt, lint, and oil so as to maintain proper amount of air the fuel requires to burn.
NOTE: If any component parts must be replaced, always use parts recommended by burner manufacturer.
PROCEDURE 8—CHECKING AND ADJUSTING CONTROLS
WARNING: Do not attempt to start the burner when excess oil has accumulated, when unit is full of vapor, or when
the combustion chamber is very hot. Failure to follow this warning could result in fire, personal injury, or death.
IMPORTANT: These instructions must be followed carefully.
A. ADJUSTING OPERATING CONTROLS
Instructions for each control are included. Refer to Table 8 for recommended settings for the first adjustment:
These settings can be changed after gaining familiarity with how system responds. If system does not give quite enough heat in very cold weather,
the high limit setting can be raised to 220°F. If more domestic hot water is required, the low limit setting can also be raised.
B. CHECKING THERMOSTAT OPERATION
When set above temperature indicated on thermometer, boiler burner should start. Make certain thermostat shuts boiler down when room
temperature reaches selected setting and starts boiler operating when room temperature falls a few degrees.
NOTE: Do not start burner unless all cleanout doors are secured in place.
Table 6—Oil Burner Specifications
BASE
MODEL
BOILER
INPUT
(BTUH)
DELEVAN
OIL
NOZZLE
FIRING
RATE
(GPM)
HEAD-
ADJUSTMENT
OR
SETTING
LOW
FIRE
BAFFLE
AIR
SHUTTER
AIR
BAND
STATIC
PLATE
(IN.)
PUMP
PRESSURE
140
91,000* 0.50–80 B 0.65 F0 1-1/8 Yes 10 0 3-5/8 175 psig
105,000 0.65–70 B 0.75 F3 1-1/8 Yes 10 0 3-1/2 140 psig
140,000 0.85–70 B 1 F3 1-1/8 No 10 2 3-1/2 140 psig
210
126,000* 0.75–80 A 0.9 F3 1-1/8 No 8 0 3-1/2 140 psig
175,000 1.00–80 A 1.25 F6 1-1/8 No 10 0 3-3/8 140 psig
210,000 1.25–80 A 1.5 F6 1-1/8 No 10 2 3-3/8 140 psig
280
168,000 1.00–60 B 1.2 V1-0 No 10 1.5 2-3/4 140 psig
245,000 1.50–45 B 1.75 V1-2 No 10 4 2-3/4 140 psig
280,000 1.65–60 B 2 V1-4 No 10 5 2-3/4 140 psig
* Requires field-supplied accessory Low Fire Kit.
Pump is factory set at 140 psig. Raise pump pressure to 175 psig after installing low fire kit for 91,000 Btuh input.
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