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Section 6
Energized Parts Charts
SELF-CONTAINED WATER-COOLED MODELS
Ice Making
1
Sequence Of
Water
Operation
Pump
1
START-UP
On
1. Water Purge
2. Refrigeration
Off
System Start-Up
FREEZE
SEQUENCE
Off
3. Pre-Chill
4. Freeze
On
HARVEST
SEQUENCE
On
5. Water Purge
6. Harvest
Off
7. AUTOMATIC
Off
SHUT-OFF
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.
Part Number 80-1630-3
Section 6
Electrical System
Control Board Relays
2
3
4
Harvest
Harvest
Air
Valve
Valve
Comp.*
(Left)
(Right)*
On
On
(when
Not Used
used)
On
Off
Not Used
Off
Off
Not Used
Off
Off
Not Used
On
On
Not Used
On
On
Not Used
Off
Off
Not Used
5
6
7
Water
Dump
Contactor
Inlet
Valve
Coil
Valve
Off
On
Off
On
Off
On
May
Cycle
Off
On
On/Off
during
the first
45 sec.
Cycles
Off
On
Off, then
On one
more
time
30 sec.
Off,
On
On
15 sec.
On
Off
Off
On
Off
Off
Off
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).
Electrical System
Contactor
7A
7B
Length
Cond.
Of Time
Comp.
Fan
Motor
Off
Off
45 Seconds
On
Off
5 Seconds
Initial Start-Up
May Cycle
is 60 Seconds
On
On/Off
30 Seconds
thereafter
Until 10 sec.
water contact
May Cycle
On
with ice
On/Off
thickness
probe
May Cycle
Factory-set at
On
On/Off
45 Seconds
May Cycle
Bin switch
On
On/Off
activation
Until bin
switch
Off
Off
re-closes &
3 min. delay
6-1
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