Ice-O-Matic ICE0250 Series installation manual ICE Series, Electrical System, Page F12

ICE Series Electrical System

Electrical Sequence for theICE1506 Series Version 3 (Manufactured from January, 2008) This unit incorporates a timer upstream of the Low Pressure Control for Low Ambients.

1.When the Selector Switch is set to ICE, Relay Number 2 Coil is energized through Cam Switch contacts C and NC (Bypasses the Bin Controls)

2.Relay Number 4B contacts C and NC energize Timer Number 2 (6 Minutes)

3.Timer number 2 times out and energizes Relay Number 3 Coil.

4.Relay Number 3B contacts C and NO close and energizes the Low Pressure Control.

5.The Low Pressure Control closes to energize Timer Number 1.

6.Timer Number 1 times out and energizes Relay Number 1 Coil

7.Relay Number 1A contacts C and NO close and send power Cam Switch Number 2 C and NC which energizes Harvest Motor 2, Hot Gas valves and Relay Number 4 Coil.

8.Relay Number 1B contacts C and NO close to energize Harvest Motor 1 and Hot Gas Valve 1.

9.When the Low Pressure Control opens during hot gas, the circuit is latched through the Purge Switch contacts C and NC.

10.Once Cam Switch 2 contacts C and NO close (High side of the Cam) it will remain energized from the Selector Switch until contacts C and NC close (Rotates 360 degrees)

11.Once Cam Switch 1 contacts C and NO close (High side of the Cam) the Harvest Motor will be energized and the Water Pump, Purge Valve and Relay Number 2 Coil will be de-energized when contacts C and NC open.

12.When Relay Number 2 Coil is de-energized and if the curtain switches or bin stat are open, the unit will pump down and shut off on full bin.

Notes:

●C=Common

●NC=Normally Closed

●NO-Normally Open

●Relay Number 9 & 12=Common

●Relay Number 1 & 4=Normally Closed ●Relay Number 5 & 8=Normally Open ●Relay 1, Puts unit into defrosts. ●Relay 2, Bypasses the Bin Switches.

●Relay 3,Energizes the Low Pressure Control ●Relay 4,Resets Timer Number 2

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