Use and Care Manual

22
to 12.5% with draft of -0.02” (water gauge) in re
box. These settings will assure a safe and efcient
operating condition. If the ame appears stringy
instead of a solid re, try another nozzle of the same
type. Flame should be solid and compact. After all
adjustments are made, recheck for a draft of -0.02”
over the re.
5. ONLY READJUST THE HEAD/TURBULATOR
SETTING if necessary.
a. Move the setting forward or back one position at
a time to optimize the smoke and CO
2
readings.
b. Steps outlined in Paragraph 3 and 4 above must
be repeated every time the Head/Turbulator or
Air Damper Setting is readjusted.
WARNING
DO NOT loosen or remove any oil line ttings
while burner is operating.
6 FLAME FAILURE
The RRO boiler controls operate the burner
automatically. If for unknown reasons the burner
ceases to re and the reset button on the primary
control has tripped, the burner has experienced
ignition failure. Refer to Oil Primary Control
features, Paragraph D, Step 2 of this Section and
Section VIII, Troubleshooting, Paragraph B. If
the failure re-occurs, call your heating contractor
immediately before pressing the reset button.
WARNING
DO NOT attempt to start the burner when excess
oil has accumulated, when the boiler is full of
vapor, or when the combustion chamber is very
hot.
7. CAD CELL LOCATION AND SERVICE
The burner is supplied with a cadmium sulde ame
detector mounted at the factory, mounted on the
bottom of the electronic ignitor. See Figure 15. To
service cad cell or to replace the plug in portion,
swing open the ignitor. After service is complete, be
sure to fasten down the ignitor.
H. CHECK FOR CLEAN CUT OFF OF
BURNER.
1. AIR IN THE OIL LINE between fuel unit and
nozzle will compress when burner is on and will
expand when burner stops, causing oil to squirt from
nozzle at low pressure as burner slows down and
causing nozzle to drip after burner stops. Usually
cycling the burner operation about 5 to 10 times will
rid oil line of this air.
2. IF NOZZLE CONTINUES TO DRIP, repeat
Paragraph H, Step 1 above. If this does not stop the
dripping, remove cut-off valve and seat, and wipe
both with a clean cloth until clean, then replace
and readjust oil pressure. If dripping or after burn
persist replace fuel pump.
I. TEST CONTROLS.
1. Check thermostat operation. Raise and lower
thermostat setting as required to start and stop
burner.
WARNING
Before installation of the boiler is considered
complete, the operation of all boiler controls must
be checked, particularly the primary control and
high limit control.
2. VERIFY OIL PRIMARY CONTROL
FEATURES using procedures outlined in
Instructions furnished with control or instructions as
follows:
GeniSys 7505 Control Features, see Figure 17.
a. The GeniSys 7505 is a microprocessor-based
control. The indicator light provides diagnostic
information for lockout, recycling and cad cell
status. There is a manual reset button to exit the
Lockout Mode.
b. Pump Priming Cycle: To facilitate purging air
from the oil lines and lters, the 7505 can be
placed in a purge routine by:
• After the burner starts, press and hold the
reset button for 15 seconds until the
yellow light turns on. This indicates that
the button has been held long enough.
• Release the reset button. The yellow
light will turn off and the burner will start
up again.
• At burner start up, click the reset button
while the igniter is till on. This will
transition the control to a dedicated Pump
Prime mode, during which the
motor, igniter, and valve are powered for
four (4) minutes. The yellow light will be on.
Figure 15: Cad Cell Location