Ice Making (Auto To Ice Making To Ice Making Complete) - Trane RTAF-SVX001K-EN Manual

Ice Making (Auto to Ice Making to Ice Making Complete)

The figure below shows the transition from Auto to Ice
making, to Ice Making Complete.
Figure 49. Sequence of events: ice making (auto to ice making to ice making complete)
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Ice Making Command:
1. Front Panel
2. Tracer
3. External Input
Auto
Auto
Maximum 1:10 to fully
RTAF-SVX001K-EN
Running
(Unit is Building Ice)
loaded
Stage and modulate all
compressors in
sequence to full load
(if not already)
Ignore Softloading and
Set CLS =100%
Energize Ice Building
Relay
De-energize Heaters,
Control EXVs and Oil
Return Solenoids per
Normal Staging - See other
sequence diagrams
Control Circuit's
Condenser Fans for Diff
Pressure
Enforce All Limits and
Running Mode Diagnostics
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Evap Entering Water
Temp Falls Below the
Ice Termination Setpoint
Shutting Down
Run Unload, Close EXVs and
Perform Operational Pumpdown
(if reqd) then Shutoff
Compressors, Energize Heaters
Confirm No
Compressor Currents
De-Energize Ice
Building Relay
Start-Up and Shutdown
Run Inhibit –
Submode: Ice
Building Complete
will return to "Auto" and normal cooling
mode with removal of Ice Command
Enforce All Non- Running
Mode Diagnostics
Leave EXVs Closed or
Close EXV for Circuits'
Off Cycle
De-Energize Oil Return
Drain and Fill Solenoids
Turn off both Circuits'
Condenser Fans
De-Energize Evaporator
Water Pump Relay (no
delay time applied)
Automatic Evaporator
Isolation Valve control
may close valve
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