Table 1. Typical wiring connections.
Connector
Label Size or Type Description
MV 1/4 inch Main Valve connection
MV/PV 1/4 inch Common terminal for gas valves
PV 1/4 inch Pilot Valve connection
BRN GND 1/4 inch Burner Ground
24V GND 1/4 inch Return path to transformer
24V 1/4 inch Optional—24 Vac power connection for Vent
Damper
TH-W 1/4 inch Connector for “Call for Heat” signal from
thermostat
P1 6-pin keyed
plug
Connector for Vent Damper connection (used
to control a connected damper in atmospheric
appliances)
P2 ECOM 3-pin EnviraCOM™ communications connector
P4 (Jumper) Jumper Provides a lockout for the DIP switch settings
SENSE
JUMPER
WIRE
Wire with
3/16 inch
quick
connect
Connects to the REMOTE SENSE connector
for installations with a single spark rod (local
flame sensing)
NOTE: For installations with remote flame
sensing (separate spark and sensor rods), this
jumper wire is clipped as close to the circuit
board as possible and the wire is discarded.
REMOTE
SENSE
3/16 inch Flame Sensor connector
For single rod installations, connect the
SENSE JUMPER WIRE to this terminal
connector.
For dual rod installations, connect the flame
sense wire from the burner/igniter to this ter-
minal connector.
SPARK 1/4 inch High voltage sparking electrode
SETTINGS AND ADJUSTMENTS
DIP SWITCH (S1) SETTINGS
When replacing an existing ignition control with the S8610U,
refer to 69-1955 for the correct DIP switch settings.
Important
Do not power the ignition control prior to setting the DIP
switches.
The following timing parameters may be set with this 2-position
DIP switch.
PREPURGE
To select Prepurge, set SW1 according to Table 2.
TRIAL FOR IGNITION (TFI)
To select the Trial for Ignition timing, set SW2 according to
Table 2.
Table 2. DIP Switch (S1) Settings.
Prepurge Trial For Ignition SW1 SW2
None 90 seconds OFF OFF
30 seconds 90 seconds ON OFF
None 15 seconds OFF ON
30 seconds 15 seconds ON ON
NOTE: The default factory settings (all OFF) are in Bold in
Table 2.
Fig. 2. DIP Switch (S1) and Jumper (P4) Location.
Fig. 3. DIP Switch (S1)—shown with factory default
settings (OFF) for SW1 and SW2.
LED STATUS AND TROUBLESHOOTING
The ignition control module has two LEDs; one for flame sens-
ing and one for system status:
Fig. 4. Location of LEDs.
FLAME LED (YELLOW)
Indicates flame presence and strength. See Table 3.
STATUS LED (GREEN)
Indicates system operation status and error conditions. See
Table 4 and the “Troubleshooting Guide” in 69-1955.
Table 3. Yellow LED Flame Codes.
Yellow LED Flash
CodeaIndicates
Recommended
Service Action
Heartbeat Normal Flame Signal Not applicable
2 Weak Flame Signal—
System will operate
reliably but flame signal
is less than desired.
NOTE: This indication
may flash temporarily
during or shortly after
lightoff on some
applications.
Perform routine main-
tenance to assure opti-
mum flame signal.
Table 3. Yellow LED Flame Codes. (Continued)
1 Marginal Flame
Signal—System may
not operate reliably over
time.
Service call
recommended.
NOTE: This indication
may flash temporarily
during or shortly after
lightoff on some appli-
cations.
Check gas supply, pilot
burner, flame sense
wiring, contamination
of flame rod, burner
ground connection.
OFF Flame Signal below
minimum threshold for
system operation.
Check gas supply, pilot
burner, flame sense
wiring, contamination
of flame rod, burner
ground connection.
a Flash Code Descriptions:
- Heartbeat: Constant 1/2 second bright, 1/2 second dim cycles.
- The flash code number signifies that the LED flashes X times at 2
Hz, remains off for two seconds, and then repeats the sequence.
Table 4. Green LED Status Codes.
Green LED
Flash Code
(X + Y) Indicates
Next System
Action
Recommended
Service Action
OFF No “Call for Heat” Not applicable None
Flash Fast Startup – Flame
sense calibration
Not applicable None
Heartbeat Normal operation Not applicable None
2 5 minute Retry
Delay
Pilot flame not
detected during trial
for ignition.
Initiate new trial
for ignition after
retry delay com-
pleted.
If system fails to
light on next trial
for ignition, check
gas supply, pilot
burner, spark
and flame sense
wiring, flame rod
contaminated or
out of position,
burner ground
connection.
3 Recycle – Flame
failed during run.
Initiate new trial
for ignition. Flash
code will remain
through the igni-
tion trial until
flame is proved.
If system fails to
light on next trial
for ignition, check
gas supply, pilot
burner, flame
sense wiring,
contamination of
flame rod, burner
ground
connection.
Table 4. Green LED Status Codes. (Continued)
4 Flame sensed out
of sequence.
If situation self
corrects within 10
seconds, control
module returns to
normal sequence.
If flame out
of sequence
remains longer
than 10 seconds,
control module
goes to Flash
code 6+4 (see
below).
Check for pilot
flame. Replace
gas valve if pilot
flame present.
If no pilot flame,
cycle “Call for
Heat.” If error
repeats, replace
control.
5 Damper Error:
– Damper required
but not present
– Damper failed
to open within 60
seconds
– Damper failed
to close within 60
seconds
If damper error
corrects, ignition
control resumes
normal operation.
Check damper
connection, damp-
er wiring, and 24V
connection on
control.
Replace damper if
necessary.
7 Flame sense leak-
age to ground.
Control module
remains in wait
mode. When the
fault corrects,
control module
resumes normal
operation after a
one minute delay.
Check flame
sense lead wire
for damage or
shorting. Check
that flame rod is
in proper position.
Check flame rod
ceramic for cracks,
damage or
tracking.
8 Low secondary volt-
age supply.
Control module
remains in wait
mode. When the
fault corrects,
control module
resumes normal
operation after a
one minute delay.
Check transformer
and AC line for
proper input volt-
age to the control.
Check with full
system load on the
transformer.
6+2 5 minute Retry
Delay
– On every third
retry on the same
“Call for Heat”
Initiate new trial
for ignition after
retry delay
completed.
Check gas supply,
pilot burner, spark
and flame sense
wiring, flame rod
contaminated or
out of position,
burner ground
connection.
2 3 4 5 6
M23618
S1 DIP SWITCH
P4 JUMPER
M23619
FLAME LED
STATUS LED
