43
Turn off burner and remove pressure gauge. Install gauge
D.
port/bleeder plug and tighten. Start burner again.
!
WARNING
Do not loosen or remove any oil line fittings while burner is in
operation.
FLAME FAILURE: The boiler controls operate the burner
E.
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.
!
WARNING
Do not attempt to start the burner when oil has accumulated in the
combustion chamber or when the unit is full of vapor, or is hot. The
operation of all boiler controls must be checked, before installation of
the boiler is completed.
TEST CONTROLS (R7184P)
4.
Check thermostat operation. Raise and lower thermostat set-
A.
ting as required to start and stop burner.
Verify primary control features using procedures outlined in
B.
instructions furnished with control or instructions as follows:
The R7184P (Beckett HW) is a microprocessor-based control.
I.
The indicator light provides diagnostic information for lock-
out, recycling and patented Cad Cell status. There is a manual
reset button to exit the Lockout Mode and enter the idle Mode.
Pump Priming Cycle
II.
: To facilitate purging air from the oil
lines and filters, the R7184 can be placed in a purge routine by
pressing and releasing the reset button during the safety check,
delayed valve-on, ignition or carry-over periods.
Limited Recycle
III.
: This feature limits the number of recycle tri-
als (for each call for heat) to a maximum of three trials. If the flame
is lost three times and does not successfully satisfy a call for heat,
the R7184 locks out.
Limited Reset
IV.
(Restricted Mode): In order to limit the
accumulation of unburned oil in the combustion area, the
control can only be reset three times. The reset count returns
to zero each time a call is successfully completed.
To reset from Restricted Mode: Press and hold the reset but-
V.
ton for 30 seconds. When the LED flashes twice, the device
has reset.
T-T Jumper: All models have pre-installed T-T jumper. Do
VI.
not remove jumper.
Diagnostic LED: The indicator light on oil primary control
VII.
R7184P provides lockout, recycle and cad cell indications as
follows:
Flashing 1/2 second on, 1/2 second off: system
is locked out or in Restricted Mode.
Flashing 2 seconds on, 2 seconds off:
control is in Recycle Mode.
On: cad cell is sensing flame.
Off: cad cell is not sensing flame.
Cad Cell Resistance Check: For proper operation it is
VIII.
important that the cad cell resistance is below 1600 ohms.
During a normal call for heat, once the control has entered the
Run Mode, press and release the reset button. Indicator light
will flash 1 to 4 flashes. See Table below for equivalent cad cell
resistance.
TABLE 12: CAD CELL Resistance When
Sensing Flame
Flashes
Resistance in ohms
1
Less than 400
2
More than 400, less than 800
3
More than 800, less than 1600
4
More than 1600, less than 5000
OPerATiNg THe BOiLer - SYSTeM STArT-UP