12
®
CAUTION: On initial power-up and on restarts following a power failure, the control will
perform self-test diagnostics for 15 seconds.
Start-Up (Normal Cycle)
Note: For direct spark ignited oil burners, substitute the words Main-Oil Valve for Pilot Valve.
1.
Constant 120 VAC should be available to the Ll-L2 terminals only on the wiring base.
2.
The operating control circuits (Ll-13) will close, signaling the burner to start its firing sequence.
3.
If the fuel valve end switch (13-3) is closed, the burner/blower motor (terminal M) circuit is
energized. The running interlock (limit) circuit (3-P) will close (e.g. all limits, interlocks, etc. are
proven).
4.
The firing rate motor (Modulator Motor) is driven toward the high purge open damper position
(10-X circuit made).
5.
When the firing rate motor reaches its open damper position, the Hi Purge switch closes (D-8)
and the prepurge interval of 30
*
seconds is initiated. The ED510 will display:
PURGE 0:05
HIGH FIRE PURGE
If the D-8 circuit does not close, the program will hold in this position for ten minutes waiting for it
to close. If it does not, the control will lockout.
6.
When the prepurge is completed, the firing rate motor is driven toward the low purge damper
position (10-12 ckt. made). The ED510 will display:
PURGE 0:35
LOW FIRE PURGE
7.
Following the minimum 30 second delay (to permit the firing rate motor to get to the low fire
position), the control will wait for the low fire switch (M-D) to close. When it closes, the trial for
ignition sequence will start. If after ten minutes, the M-D circuit is not closed, the control will
lockout. The EPD167 will wait indefinitely for the M-D circuit to close.
*
Prepurge timing is selectable via dipswitches.
TYPE EP(D)160
NON-RECYCLE RUNNING INTERLOCKS (3/P)
PURGE TIME - 30 SEC.*
FLAME FAILURE RESPONSE TIME 4 SEC.
PROGRAMMING SEQUENCE
L1/13
ON
LFS
CLOSED
(MD)
FIRING
PERIOD
L1/13
OFF
MTFI
10 SEC
PTFI
10 SEC
MTFI
15 SEC
PURGE
30 SEC
M
T
E
R
M
I
N
A
L
S
5
6
7
POST PURGE
15 SEC
MIN
30 SEC
HIGH (10-X)
LOW (10-12)
AUTO (10-11)
LOW (10-12)
(MODULATOR MOTOR CIRCUIT)
HFS
CLOSED
(D8)
DIPSWITCH SETTINGS
1
2
3
4
5
6
INACTIVE Down Down Down Down
Refer to appropriate programmer
bulletin for a complete description
of the dipswitch functions
.
