Trane Optimus RTHD - Stopped to Compressor Starting

RTHD-SVX01L-EN
57
Stopped to Starting
The stopped to starting diagram shows the timing from a
stopped mode to energizing the compressor. The shortest
allowable time would be under the following conditions:
• No motor restart inhibit
• Evaporator and Condenser Water flowing
• Power up Start Delay Timer has expired
• Adjustable Stop to Start Timer has expired
• Need to cool
The above conditions would allow the compressor to start
in 60 seconds.
Figure 28. Sequence of events: stopped to starting
Enforce Restart
Inhibit Timer
(0 to 30 mins)
Confirm Condense r
Water Flow
(6 Second Filter)
Stopped
Or
Run
Inhibit
Chiller Mode
Set to Auto
Auto
Call for
Cooling
Waiting
to Start
Starting
Compressor
Energize Evaporator
Water Pump Relay
Energize Condenser
Water Pump Relay
Confirm Evaporator Water
Flow Within 20 minutes
(6 Sec Filter)
Confirm Condenser Water
Flow Within 20 minutes
(6 Sec Filter)
Pre-Position EXV
Waiting
to Start
Oil Heater always ene rgized
when compressor is d e -
energized
Confirm Evaporator
Water Flow
(6 Second Filter)
Energize Unload
Solenoid
Confirm Presence of Oil
With Optical Oil Sensor
(0 to 2 mins)
Waiting
to Start
Condense r
Water Pump
Pre-Run
Waiting
to Start
Enforce 'Cond
Pmp Strt Delay'
(0 to 300 Sec)
(0 to 30 mins)
Enforce 'Cprsr
Strt Delay'
(0 to 300 Sec)
Waiting
to Start
Start-Up and Shutdown