Use and Care Manual

27
110637-01 - 5/20
RRO Installation & Service Manual
3. CHECKOUT
Put the system into operation and observe
at least one complete cycle to make sure
that the controller operates properly. See
Troubleshooting Section to use LED to assist in
determining system operation.
E. ADJUST OIL BURNER BEFORE STARTING.
1. CHECK BURNER SETTINGS and readjust if
necessary, see Burner Specifications, Table
15-1 at the rear of this manual.
F. START OIL BURNER.
1. Open vent fitting on fuel pump.
2. TURN ‘ON’ BURNER service switch and
allow burner to run until oil flows from vent
fitting in a SOLID stream without air bubbles
for approximately 10 seconds.
3. Close vent fitting and burner flame should
start immediately after prepurge is completed.
Prepurge prevents burner flame until 10
seconds has elapsed after initial power is
applied to burner. During prepurge the motor
and igniter will operate but the oil valve will
remain closed. Refer to Oil Primary Control
Instructions for more details.
4. Adjust oil pressure.
a. When checking a fuel unit's operating
pressure, a reliable pressure gauge may
be installed in either the bleeder port or the
nozzle port.
b. Locate oil pressure adjusting screw and
turn screw to obtain proper pump pressure,
refer to Table 15-1 at the rear of this manual.
c. To check the cutoff pressure, deadhead a
reliable pressure gauge onto the copper
connector tube attached to the nozzle port.
Run the burner for a short period of time.
Shut the burner off. The pressure should
drop and hold.
d. Remove the gauge and install bleeder port
and/or reconnect the nozzle port line.
G. ADJUST OIL BURNER WHILE OPERATING.
(flame present)
1. SET ROOM THERMOSTAT about 10°F below
room temperature.
2. PRESS RED RESET BUTTON on Oil Primary
Control and release.
3. READJUST THE HEAD SETTING only if
necessary.
4. ADJUST DRAFT REGULATOR for a draft of
-0.02" (water gauge) over the fire after chimney
has reached operating temperature and while
burner is running.
WARNING
DO NOT loosen or remove any oil line fittings
while burner is operating.
5. READJUST THE AIR SETTING on the burner
for a light orange colored flame while the draft
over the fire is -0.02". Use a smoke tester and
adjust air for minimum smoke (not to exceed
#1) with a minimum of excess air. Make final
check using suitable instrumentation to obtain a
CO
2
of 11.5 to 13.0% with draft of -0.02" (water
gauge) in fire box. These settings will assure
a safe and efficient operating condition. If the
flame appears stringy instead of a solid fire, 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 fire.
6. FLAME FAILURE
The RRO boiler controls operate the burner
automatically. If for unknown reasons the
burner ceases to fire and the reset button on
the primary control has tripped, the burner
has experienced ignition failure. Refer to Oil
Primary Control features, Paragraph I, Step 2 of
this Section and Section XV, 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.
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.
9 System Start-Up (continued)
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