Manitowoc Ice S1800 SELF-CONTAINED Models, Initial Start-Up or Start-Up After Automatic Shut-Off

Electrical System Section 6

Wiring Diagram Sequence of Operation

SELF-CONTAINED MODELS

Initial Start-Up or Start-Up After Automatic Shut-Off

1. WATER PURGE

Before the compressor starts, the water pump and water dump solenoid are energized for 45 seconds to purge old water from the ice machine. This ensures that the ice-making cycle starts with fresh water.

The harvest valve(s) is also energized during the water purge. In the case of an initial refrigeration start-up or auto shut-off, it stays on for an additional

5 seconds (50 seconds total).

The air compressor energizes for the last 10 seconds of the cycle.

L1					L2 or N
Ground				Water Valve
(89)	(55)	(20)	(21)		(99)
		(61)		(22)
High
	Control Board		Harvest Valve
Pressure
	(2)		(77)
(88) Cutout	(6)	(60)		(80)
	(5)		Dump Valve		(75)
	(1)
	(7)		(76)	(81)
	(4)	(57)	Water Pump
			(98)
(42)	Trans.	(58)
	Fuse (7a)			Terminates at
			(59)	Pin Connection
		L2	Contactor Coil

(25)(56)

			(26)	Air Compressor
Ice Thickness	(9)			(74)
Probe		(8)
Water Level Probe				Bin Switch
	Low DC		(6)
	Voltage		(1)	Clean
	Plug
				OFF
				ICE

		(Red)	(2)
		Compressor
Contactor	Overload	(Yellow)	(46)	Run Capacitor
				(50)
Contacts	(Black)
L1				(45)

(51) (85) (86) PTCR

Fan Motor

Fan Cycle

Control

Run Capacitor

SV3137-2

		Self-Contained — Water Purge
Table 6-1. Self-Contained Models
		1. Water Purge (45 Seconds)
Toggle Switch			ICE
Bin Switch			Closed
Control Board Relays
#1	Water Pump		ON
#2	Harvest Valve (Left)		ON
#3	Harvest Valve (Right)		ON (When Used)
#4	Air Compressor		35 sec. OFF / 10 sec. ON
#5	Water Inlet Valve		OFF
#6	Water Dump Valve		ON
#7	Contactor Coil		Open / OFF
#7A	Compressor		OFF
#7B	Condenser Fan Motor		OFF
Safety Controls (Which could stop ice machine operation)
	High Pressure Cut-Out		Closed
	Main Fuse (On Control Board)		Closed

6-2 Part Number 80-1634-3