Section 6
Electrical System
Part Number 80-1630-3
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)
Not Used
Off
On
Off
Off
Off
45 Seconds
2. Refrigeration
System Start-Up
Off
On
Off
Not Used
On
Off
On
On
Off
5 Seconds
FREEZE
SEQUENCE
3. Pre-Chill
Off
Off
Off
Not Used
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
Not Used
Off
On
On
May Cycle
On/Off
Until 10 sec.
water contact
with ice
thickness
probe
HARVEST
SEQUENCE
5. Water Purge
On
On
On
Not Used
30 sec.
Off,
15 sec.
On
On
On
On
May Cycle
On/Off
Factory-set at
45 Seconds
6. Harvest
Off
On
On
Not Used
Off
Off
On
On
May Cycle
On/Off
Bin switch
activation
7. AUTOMATIC
SHUT-OFF
Off
Off
Off
Not Used
Off
Off
Off
Off
Off
Until bin
switch
re-closes &
3 min. delay
Summary of Contents for S600M
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Page 100: ...Refrigeration System Section 7 7 34 Part Number 80 1630 3 THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 101: ...Section 7 Refrigeration System Part Number 80 1630 3 7 35 THIS PAGE INTENTIONALLY LEFT BLANK ...
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