Manitowoc Welbilt Indigo NXT QuietQube, Manual

Page: 96 / 183

© Welbilt, Inc.
Auto Shut-Off – Condensing Unit
96
Indigo NXT QuietQube/CVD: Sequence of Operation
1. With the liquid line solenoid valve closed the refrigeration system
pumps down.
2. The head pressure falls below the fan cycling control cut-out and the
condenser fan motor stops.
3. The suction pressure drops below the low pressure switch cut-out
a) R-404a = 12 psig cut out.
b) R-410a = 20 psig (30 psig differential).
4. The contactor opens and the compressor shuts-off.
5. When the LPC opens there will be a 5 minute delay before the ice
machine and CVD Condensing unit can re-start due to the Delay on
Break-Lock out solid state timer located in the Condensing Unit.
Bin Switch Open
for more than
30 seconds
7
Auto Shut Off
(10 Minute Delay)
Start
Equalize
6
Harvest
Bin Switch
5
Purge
45 Sec
Harvest 4
Freeze
Ice Thickness
Probe
3
Pre-Chill
30 Sec.
(thereafter)
1
Purge
45 Sec 5 Sec
5 Sec
2
** This is to reduce short cycling for pump down cycles / short cycling. **