5
Pre-Purge
Post-Purge
Pre-Cycle Fan Prover
Status Check Activated
DIP SWITCH NUMBERING
1
ON
2
3 4 5 6 7 8
9
LED FAULT INDICATORS
Fault conditions are indicated by counting the number of times LED #4 (Red) flashes.
LED #4 Flashes 2 Times
Fan Prover was in electrically closed position prior to venter operation.
LED #4 Flashes 3 Times*
Fan Prover does not close within 60 seconds after call for heat.
LED #4 Flashes 4 Times*
Fan Prover did not re-close after 10 minutes of Venter operation.
LED #4 Flashes 5 Times*
Fan Prover opened for more than 10 seconds during burner cycle but closed within 10 minutes.
* Investigate causes of Fan Prover not making, i.e; Firing burner at capacities or temps exceeding Venter limits, excessive vent pipe runs, high winds,
plugged / kinked Fan Prover sensing tube or faulty Fan Prover. Reset SS2 High Limit. If Limit was tripped and SS2 fires, investigate cause
of high heat.
tripped and SS2 fires, investigate cause of high heat.
CHECKING MEMORY FOR LAST FAULT CODE
IMPORTANT:
Prior to accessing the fault code memory, note the settings of the dip switches so that they can be returned to their original Pre / Post-
Purge positions. When power is supplied to the UC1 use caution when moving dip switches.
The last fault code can be retrieved at any time by setting all dip switches 1-8 to the up, or “on” position. The last fault code, or lack there of, will be indi-
cated by counting the number of times LED #4 flashes. By moving any of the dip switches back to their original position, the fault code will be cleared.
NOTE:
The UC1 board must have its 115 VAC power supply present when any of the (1-8) dip switches are moved back to their original position for the
fault code to clear.
PRE / POST PURGE AND PROVER STATUS CHECK DIP SWITCH SETTINGS
Remove power to SS2 and heating equipment when installing, servicing or changing dip switch settings. Failure to do so may result in
personal injury and/or equipment damage. LED #6 (RED) should not be on if 115 VAC supply power is removed from the control.
Pre-purge
Used for longer vent runs to get draft fully established throughout the vent system prior to burner ignition. Also beneficial for negative pressure prone
environments.
IMPORTANT:
Nuisance equipment lockouts may occur if our pre-purge is running in conjunction with and is longer than any equipment
timing circuit. Pre-purge settings must be shorter than burner control lockout time unless wired prior to burner control timing circuit (i.e. aquastat / thermostat).
Post-purge
A Venter post-purge has been factory set at 2 minutes. Confirm that dip switch #5 is in the up or "on" position. Oil fired equipment requires that the
post-purge be long enough to eliminate post cycle nozzle drip odor. A longer post-purge may be necessary for longer vent runs or high heat retention,
refractory lined combustion chambers. A shorter post-purge may be desired for gas installations.
IMPORTANT:
Fault codes will automatically be displayed after a fault condition occurs. If the call for heat interlock signal or 115 VAC power is
removed, the UC1 board will reset and the fault will be stored in memory instead of displayed. Any new fault will replace any previous fault.
LED 1 AMBER
LED 2 BLUE
LED 3 GREEN
LED 4 RED
LED 5 RED
LED 6 RED
POWER LED
ON
ON
ON
POST-PURGE SETTINGS
(SEE “POST-PURGE” ABOVE PRIOR TO SETTING)
ON
4
3
4
8
6
5
7
3
5 6 7 8
3 4 5 6 7 8
3
7
5
4
6
8
4
3
4
8
6
5
7
3
5 6 7 8
3 4 5 6 7 8
4 Minutes
8 Minutes
16 Minutes
1 Minute
0 Seconds
30 Seconds
2 Minutes
PRE-PURGE SETTINGS
(SEE “PRE-PURGE” ABOVE PRIOR TO SETTING)
1 2
1 2
1 2
1 2
0 Seconds
5 Seconds
20 Seconds
35 Seconds
P1 & P2 PRE-CYCLE FAN PROVER STATUS CHECK
The Pre-Cycle Prover Status Check is activated from the factory. When activated the UC1
Universal Control checks across P1 & P2 safety circuit (SS2 Prover & Limit) to verify that the Fan
Prover switch is “Open” upon a call for heat and not stuck “Closed”.
Pre-Cycle
Prover Status
Check Activated
9
1 9
