Manitowoc S User Manual

Electrical System Section 6
6-2
Part Number 80-1480-3
REMOTE MODELS
1. Initial Start-Up or Start-Up After Automatic Shut-Off
*Not used on all models
Auto Shut-Off
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 1-
2) immediately after the delay period, if the bin switch re-
closes prior to 3 minutes.
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 0 or 45 second purge
cycle.
Safety Timers
The control board has the following non-adjustable
safety timers:
• The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence. The freeze lock
is bypassed when the toggle switch is moved from
the OFF to ICE position on the first cycle only.
• The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
• The maximum harvest time is 3-1/2 minutes, at which
time the control board automatically terminates the
harvest sequence. If the bin switch is open, the ice
machine will go to automatic shut-off (step 7). If the
bin switch is closed, the ice machine will go to the
freeze sequence (steps 3-4).
Ice Making
Sequence Of
Operation
Control Board Relays Contactor
Length
Of Time
123456 7 7A 7B
Water
Pump
Harvest
Valve
(Left)
HPR
Valve
Harvest
Valve
(Right)*
Air
Comp.*
Water
Inlet
Valve
Dump
Valve
Contactor
Coil
Liquid Line
Solenoid
Comp.
Cond.
Fan
Motor
START-UP
1
1. Water Purge
On On On
35 sec.
Off
10 sec.
On
Off On Off Off Off 45 Seconds
2. Refrigeration
System
Start-Up
Off On On Off On Off On On On 5 Seconds
FREEZE
SEQUENCE
3. Pre-Chill
Off Off Off Off
May
Cycle
On/Off
during
first
45 sec.
Cycles
Off then
On one
more
time
Off On On On
Initial Start-
Up is 60
Seconds
30 Seconds
thereafter
4. Freeze On Off Off Off Off On On On
Until 10 sec.
water
contact with
ice
thickness
probe
HARVEST
SEQUENCE
5. Water Purge
On On On
On; after
35 sec.
30 sec.
Off,
15 sec.
On
On On On On
Factory-set
at 45
Seconds
6. Harvest Off On On On Off Off On On On
Bin switch
activation
7. AUTOMATIC
SHUT-OFF
Off Off Off Off Off Off Off Off Off
Until bin
switch re-
closes

Manitowoc S Specifications

General

Brand	Manitowoc
Model	S
Category	Ice Maker
Language	English