KeepRite sequences of operation

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

Air conditioner (2)

Cooling

• Split A/C: cooling cycle with standard thermostat or communicating control
  C4A3, H4A3, T4A3

Other

• Split A/C: pressure switch and thermal cutout protection and lockout
  C4A3, H4A3, T4A3

Furnace (7)

Ignition

• Modulating 95% furnace: ignition sequence and retries
  (F-G)9MAE
• Single- and two-stage 95% furnace: ignition sequence and retries
  (F-G)9MXE, (F-G)9MXT

Heating

• Modulating 95% furnace: adaptive heating, staging and blower delays
  (F-G)9MAE
• Single-stage 95% furnace: heating cycle and blower delays
  (F-G)9MXE
• Two-stage 95% furnace: low/high heat, staging and blower delays
  (F-G)9MXT

Cooling

• Furnace blower with outdoor A/C: cooling, dehumidify and continuous fan
  (F-G)9MXE, 9MXT, 9MAE

Other

• Furnace used with a heat pump (dual fuel blower timing)
  (F-G)9MXE, 9MXT, 9MAE

Heat pump (5)

Heating

• Heat pump: heating cycle with supplemental heat
  N4H4, R4H4, WCH4

Cooling

• Heat pump with 5-minute compressor delay: cooling and heating start
  Performance Series
• Heat pump: cooling cycle
  N4H4, R4H4, WCH4

Defrost

• Heat pump (Fast #1174185 board): defrost interval, Quiet Shift and speed-up test
  Performance Series
• Heat pump: time/temperature defrost and Quiet Shift 2
  N4H4, R4H4, WCH4

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.