Trane S*HF*20-75 Troubleshooting Manual page 68

SETUP Menu
Ventilation Override Mode C - (Exhaust)
• Supply Fan – Off
• Inlet Vanes - Closed (if equipped)
• Return Fan / Exhaust Damper – On / Open (if equipped)
• Return Fan VFD – Max
• OA Dampers – Closed
• Heat - All heat stages Off (staged gas and elec.); Hydronic heat & Mod Gas Heat output at 0%.
• Occupied / Unoccupied output – Deenergized
• VO Relay – Energized
• VCM Preheater State - Off (with VCM installed)
Ventilation Override Mode D - (Purge)
• Supply Fan – On
• Inlet Vanes / VFD - Open / 100%
• Return Fan VFD – Max
• Return Fan / Exhaust Damper - On / Open (if equipped)
• OA Dampers – Open
• Heat - All heat stages Off (staged gas and elec.); Hydronic heat & Mod Gas Heat output at 0%.
• Occupied / Unoccupied output – Energized
• VO Relay – Energized
• VCM Preheater State - Off (with VCM installed)
Ventilation Override Mode E - (Purge with Duct Pressure Control)
• Supply Fan – On
• Return Fan VFD – Max
• Inlet Vanes / VFD - Open/100% (Ctrl'd by SA Press control function, SA Press High Limit is disabled)
• Return Fan / Exhaust Damper - On / Open (if equipped)
• OA Dampers – Open
• Heat - All heat stages Off (staged gas and elec.) Hydronic & Mod Gas Heat output at 0%.
• Occupied / Unoccupied output – Energized
• VO Relay – Energized
• VCM Preheater State - Off (with VCM installed)
Note:
1. The five VOM modes A, B, C, D, E will have the factory defaults set to the above defined values.
2. "OFF" - will appear in the Ventilation Override screen after all VOM binary inputs have been reset (opened).
68 RT-SVP07B-EN