Specifications

10
®
65UV5-1004 (CEX)
SELF-CHECK SHUTTER OPERATION
The 65UV5 self-check shutter mechanism is a powered-open, powered-closed device (no return
spring). The open/closed shutter period is variable and controlled by the scanner’s microprocessor.
Upon initial 24 vdc power application, the shutter will close and open once to verify proper opera-
tion. The shutter will then remain open until a UV flame source is present and the internal flame
relay (RF) is energized.
When the flame relay (RF) is energized, the shutter will be driven closed once every 12 seconds. The
amount of time the shutter will remain closed is determined by the scanner’s microprocessor and is
dependent upon the UV tube’s response. The amount of time closed can vary between 50 ms and 300
ms.
In the event of a self-check failure the flame relay will de-energize.
INDICATION LEDs
The 65UV5 contains a color coded internal LED that indicates flame status and alarm condition per
the following table. View LED through lens on back of housing. Refer to Fig. 12 for LED location.
Table 2:
LED STATUS CONDITION FLAME
RELAY (RF)
STATUS
*SHUTTER POSITION
OPEN CLOSED
GREEN OFF NO FLAME DETECTED OFF
ONCE PER
SECOND
FLASHING
RATE
MARGINAL FLAME SIGNAL ON
RAPID
FLASHING
RATE
NORMAL FLAME SIGNAL ON
STEADY ON HIGH FLAME SIGNAL ON
RED OFF NORMAL ON
FLASHING *SELF-CHECK FAILURE
(observe shutter position)
OFF SHUTTER
FAILURE
UV TUBE
FAILURE
ON MICROPROCESSOR ERROR OFF
INTERNAL FACTORY WIRING
12
34
BLK
RED BL
YEL
INTERNAL FACTORY WIRING
56
78
WHT
BRN GRN
OR
BLOCK ONE
BLOCK TWO