Emerson UVC120, MAN -0016-00 manual Time Delay for Area Alarms, Relay Settings

TIME DELAY FOR AREA ALARMS

NOTE

Time delay affects the Area alarms only; the instant alarm operates as soon as a flame is detected.

The time delay for the Area alarms is set using SW 5.3 to SW 5.7. If all of the switches are placed in the ‘OFF’ position the time delay will be 0.5 seconds (minimum setting).

<SW 5.3-7: OFF: 0.5 sec. time delay

<SW 5.3: ON: 0.5 sec. time delay

<SW 5.4: ON: 1 sec. time delay

<SW 5.5: ON: 2 sec. time delay

<SW 5.6: ON: 4 sec. time delay

<SW 5.7: ON: 8 sec. time delay

If switch 5.8 is "OFF" then in Bypass mode:

-the current output is 4 m A

-the Fault Relay state rem ains unchanged (if it was energized, it rem ains energized; if it was de-energized, it remains de-energized)

If switch 5.8 is "ON" then in Bypass mode:

-the current output is 3 m A

-the Fault Relay is de-energized

The total time delay is the added value of the switches turned ON. Switches can be turned ON in any combination for a time delay from 0.5 to 15.5 seconds in half second increments. These switches are factory set to a 3.0 second time delay as shown in the example below.

Example:	SW 5.3	OFF	time delay
	SW 5.4	ON	= 2.5 sec.
	SW 5.5 ON
	SW 5.6	OFF
	SW 5.7	OFF

NOTE

SW 3.5 through SW 3.8 are not used.

RELAY SETTINGS

There are four relays on the controller circuit board that can be configured for normally OFF or normally ON operation by moving the jumpers which are located below the relays. See Figure 11c for the location of the relays on the circuit board and Figure 11d for the settings.

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