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Start-up and Shutdown
Ice Making (Stopped to Ice to Ice Making
Complete)
The following diagram shows the transition from stopped to
ice to ice making complete.
Figure 38. Sequence of events: ice making (stopped to ice to ice making complete)
Ice Making Command:
1. Front Panel
2. Tracer
3. External Input
Auto
Auto
Maximum 1:10 to fully
Stage and modulate all
compressors in
sequence to full load
(if not already)
Ignore Softloading and
Set DLS = 200
De-energize Heaters and
Control EXVs per Normal
Staging - See other
sequence diagrams
Control Circuit's
Condenser Fans for Diff
Pressure
Enforce All Limits and
Running Mode Diagnostics
92
Running
(Unit is Building Ice)
loaded
%*
Energize Ice Building
Relay
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
De-Energize Ice
Building Relay
Building Relay
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
Turn off both Circuits'
Condenser Fans
De-Energize Evaporator
De-Energize Evaporator
Water Pump Relay (no
Water Pump Relay (no
delay time applied)
delay time applied)
*
If Ice Building Demand Limit Enable =
Disabled (Default)
AC-SVX003A-EN
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