58
HDWA-SVX001D-EN
Ice Making (Running to Ice Making to
Running)
The following figure shows the transition from normal
cooling to ice making, and back to normal cooling.
Figure 42.
Sequence of events: ice making (running to ice making to running)
Ice Making Command
1. Front Panel
2. Tracer
3. External Input
Ice Making
Command
Withdrawn
Evaporator Leaving
Water Temperature
Rises Above the
Differential to Stop
Running
Running
Running
(Ice Building)
Running
(Ice to Normal Transition)
Running
Ice to Normal Transition Timer
(0–10 Minutes)
Head Relief Request Relay Delay
(1–60 Minutes)
Head Relief Request Relay Delay
(1–60 Minutes)
Open IGV at Max Rate/
Max AFD Frequency
Ignore Softloading and
Set CLS=100%
Energize Ice Building
Relay
Softload to CWS
De-Energize Ice
Building Relay
Modulate IGV/AFD
for LWT Control
De-Energize Head
Relief Request Relay
Energize Head Relief
Request Relay
Enforce All Limits and Running Mode Diagnostics
