Energized parts charts – Manitowoc Ice MARINE MODEL S1800 User Manual
Page 39
Section 6
Electrical System
Part Number 80-1634-3
6-1
Section 6
Electrical System
Energized Parts Charts
SELF-CONTAINED WATER-COOLED MODELS
1. Initial Start-Up or Start-Up After Automatic Shut-Off
* Not Used on all Models
Condenser Fan Motor
The fan motor is wired through a fan cycle pressure control, therefore,
it may cycle on and off.
Harvest Water Purge
The circuit board has an adjustable water purge in the harvest cycle.
This permits a 0 or 45 second purge cycle.
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.
Safety Timers
The control board has the following non-adjustable safety timers:
•
The ice machine is locked into the freeze cycle for 6 minutes,
before a harvest sequence can be initiated. 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
1
2
3
4
5
6
7
7A
7B
Water
Pump
Harvest
Valve
(Left)
Harvest
Valve
(Right)*
Air
Comp.*
Water
Inlet
Valve
Dump
Valve
Contactor
Coil
Comp.
Cond.
Fan
Motor
START-UP
1
1. Water Purge
On
On
On
(when
used)
35 sec.
Off
10 sec.
On
Off
On
Off
Off
Off
45 Seconds
2. Refrigeration
System Start-Up
Off
On
Off
Off
On
Off
On
On
Off
5 Seconds
FREEZE
SEQUENCE
3. Pre-Chill
Off
Off
Off
Off
May
Cycle
On/Off
during
the first
45 sec.
Cycles
Off, then
On one
more
time
Off
On
On
May Cycle
On/Off
Initial Start-Up
is 60 Seconds
30 Seconds
thereafter
4. Freeze
On
Off
Off
Off
Off
On
On
May Cycle
On/Off
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
May Cycle
On/Off
Factory-set at
45 Seconds
6. Harvest
Off
On
On
On
Off
Off
On
On
May Cycle
On/Off
Bin switch
activation
7. AUTOMATIC
SHUT-OFF
Off
Off
Off
Off
Off
Off
Off
Off
Off
Until bin
switch
re-closes &
3 min. delay