Andover Controls Infinity Manual page 132

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AHU_Control
Type: Program
FlowType: Looping
AutoStart: True
Description: Controls the state of the Air Handling Unit's Fans
and Dampers.
Code:
FanControl:
' Supply Fan Control
If INFINITY1 AH2Sfan.OVR.Off then
Sfan = Off
Else
If INFINITY1 AH2Sfan.OVR.On then
Sfan = On
Else
If INFINITY1 Zone2.PRS or INFINITY1 Zone3.PRS or ~
INFINITY1 Zone4.PRS then
Sfan = On
Else
If INFINITY1 Zone2.EXH and INFINITY1 Zone3.EXH ~
and INFINITY1 Zone4.EXH then
Sfan = Off ' Exhaust only
Else
If INFINITY1 Zone2.SMK and INFINITY1 Zone3.SMK ~
and INFINITY1 Zone4.SMK then
Sfan = Off 'Exhaust only all zones in smoke
Else
If INFINITY1 Zone1.SMK or INFINITY1 Zone2.SMK ~
or INFINITY1 Zone3.SMK or INFINITY1 ~
Zone4.SMK or INFINITY1 STRWL.SMK then
Sfan = On 'Another zone is in smoke
Else
Sfan = Default.Sfan ' Normal HVAC Control
Endif
Endif
Endif
Endif
Endif
Endif
' Return Fan Control
If INFINITY1 AH2Rfan.OVR.On then
Rfan = On
Else
If INFINITY1 AH2Rfan.OVR.Off then
5-56
Smoke Control Programs
Infinity Smoke Control Guide
TOC