Freeze Cycle Sequence Of Operation - Scotsman EH222 Quick Start Manual

EH222 and Condensing Unit
Remote Low Side Cuber Service Manual

Freeze Cycle Sequence of Operation

This sequence begins with a restart after the unit has
shut off with the bin full. Ice has been consumed,
causing the ice sensors to become un-blocked.
1. The controller (four minutes has to have passed
since the machine shut off on bin full for the machine
to restart)
2. The purge valve is opened and the pump started.
3. After the purge valve closes the inlet water valve
opens and fills the reservoir.
Note: If the water reservoir does not fill within the time
period expected the controller will shut off and switch
on the water indicator light. It will re-try to fill the
reservoir in 20 minutes. If successful the freeze cycle
will continue.
4. The compressor and fan motor start and the
freezing process begins.
Note: The controller is connected to two external
relays in the EH222, one for the condensing
unit's compressor contactor and the other for the
condensing unit solenoid valves. A separate 24
volt transformer is in the condensing unit supplying
power to the contacts of these two line voltage relays
through the interconnecting wire.
5. The controller will shut the water pump off for a
few seconds when the reservoir's water temperature
reaches a pre-set point.
6. The freeze cycle continues until water makes
continuous contact with the ice thickness sensor. That
signals the controller to terminate the freeze cycle and
begin the harvest cycle. The Ready to Harvest light
will be ON.
August 2013
Page 35