York J Series - Page 37

FORM 100.50-NOM7 (808)
37
JOHNSON CONTROLS
3
Setting #4, Purge
If the smoke purge setting is set to 4 and the Smoke
Purge input is activated, the unit will do the follow-
ing:
• Turn ON the Supply Fan full (VFD to 100%).
• Energize the VAV Heat Relay and drive all VAV
boxes open.
• Turn ON the Exhaust Fan full (VFD/ED to
100%).
• Open the Outside Air Damper(s) full.
• Close the Return Air Damper full.
Maintain this operation until the Smoke Purge input is
deactivated, then return to normal operation.
Setting #5, Purge w/ Duct Pressure Control
If the smoke purge setting is set to 5 and the Smoke
Purge input is activated, the unit will do the follow-
ing:
• Supply Fan
• VAV units -Turn ON the Supply Fan VFD and
control to the Duct Static Setpoint.
• CV - Turn ON fan (variable output is 100%).
• Turn ON the Exhaust Fan full (VFD/ED to
100%).
• Open the Outside Air Damper(s) full.
• Close the Return Air Damper full.
Maintain this operation until the Smoke Purge input is
deactivated, then return to normal operation.