Document: LT0400
4100U-S1 Programming Guide
AS1668 Fan Controls
Issue 1.4
15 December 2010
Page 10-11
10.5.5
S/A DETECTOR ACTIVE
The S/A detector is added to the zone list.
This equation uses negative logic - all operations are triggered when the S/A Detector is not
active - it has cleared of smoke. This is followed by the restart delay OR if the detector is
isolated. The output uses TRACK OFF to work with the input conditions.
[INPUTS]
NOT
STATUS
ON
L345 | LIST | MIXED | S/A DETECTOR FAN #1
DELAY
ANALOG
A262 | Analog Timer | ANALOG | TIMER | S/A DETECTOR RESTART DELAY-FAN 1
A261 | Analog Timer SetPoint | ANALOG | ANALOG | S/A DETECTOR RESTART DELAY SETPOINT
OR
STATUS
ON
P685 | DIGITAL | SUPERV | FAN #1 S/A DETECTOR
[END INPUTS]
[OUTPUTS]
TRACK
OFF
PRI
=
9
,
9
P885 | DIGITAL | UTILITY | S/A OR SPF FAN 1
[END OUTPUTS]
10.5.6
Trigger FAN ON
This equation sets the fan control relay to operate the fan when A/C Trip (P521) is ON, or
when the „manual-start‟ is operated. The relay is prevented from operating if the Stop Relay
is active (from smoke in Duct Detector) and the control is in Auto position.
[INPUTS]
STATUS
ON
P521 | DIGITAL | UTILITY | A/C TRIP
AND
NOT
STATUS
ON
M1
-
3
-
0
| RIAM | RELAY | FAN 1 STOP RELAY
OR
STATUS
ON
P1201 | DIGITAL | UTILITY | FAN #1 MANUAL START
[END INPUTS]
[OUTPUTS]
TRACK
ON
PRI
=
9
,
9
M1
-
5
-
1
| MRELAY | RELAY | FAN 1 START RELAY
[END OUTPUTS]
10.5.7
Trigger FAN OFF
This equation sets the fan control relay to stop the fan when smoke is detected by the Duct
Detector, or when the manual-stop is ON.
[INPUTS]
STATUS
ON
P885 | DIGITAL | UTILITY |S/A OR SPF FAN 1
AND
NOT
STATUS
ON
P1201 | DIGITAL | UTILITY | FAN #1 MANUAL START
OR
STATUS
ON
P1202 | DIGITAL | UTILITY | FAN #1 MANUAL STOP
[END INPUTS]
[OUTPUTS]
TRACK
ON
PRI
=
9
,
9
M1
-
3
-
0
| RIAM | RELAY | FAN 1 STOP RELAY
[END OUTPUTS]
