Trane sequences of operation

11 sequences for Trane equipment: what the unit does, step by step, with the timings. Pick the equipment type, then the mode.

Air handler (4)

Startup

• Modular blower run test mode
  P0V0 modular blower

Heating

• Modular blower heat pump heating call (single and two-stage)
  P0V0 modular blower

Cooling

• Modular blower cooling call (single and two-stage)
  P0V0 modular blower

Other

• Modular blower EAC and humidifier timing
  P0V0 modular blower

Furnace (6)

Heating

• First-stage gas heating
  S8B1, S8X1, S8X2
• Heating call sequence of operation
  UH1, DH1
• Heating sequence of operation
  AUH1B
• Second-stage gas heating (S8X2 only)
  S8X2

Cooling

• Cooling and heat pump calls on S8 furnace control
  S8B1, S8X1, S8X2
• Cooling fan-off delay
  UH1, DH1

Heat pump (1)

Defrost

• Heat pump demand defrost
  5TWR7 (XR/XV ComfortSeek)

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.