Scotsman CME256 AutoIQ - Manual (Page 13)

Adjustments:
How to adjust the water cooled discharge
pressure
Water cooled models use a water regulating valve
to control how much cooling water flows thru the
water cooled condenser. At the top of that valve,
located in the right rear corner of the ice machine,
is an adjustment stem.
To Adjust:
1. Attach a refrigeration manifold gage to the
discharge access valve.
2. While the unit is in the freeze cycle, determine
the discharge pressure, it should be about 245
PSIG.
3. If needed, rotate the adjustment stem to
increase or decrease the pressure:
A. To increase discharge pressure (reduce water
flow) rotate the stem counter-clockwise.
B. To decrease the discharge pressure (increase
water flow) rotate the stem clockwise.
Remove the manifold when done. Note: The water
outlet temperature should be between 100-110
when the valve is properly set.
Thermostatic Expansion Valve:
The TXV is not adjustable, do not attempt to adjust
it.
How to Adjust the Amount of Water Purge
Adjustment is done by use of the control buttons
on the AutoIQ Controller. Examine the next section
to become familiar with the Controller before
beginning.
1. If the machine is on, push and hold the OFF
button for more than 3 seconds, then release it.
This switches the machine Off.
2. Push and hold the OFF button for more than 3
seconds (just until all lights flash on) then release
it. Do not hold it in it too long.
3. Examine the green lights. They should have all
flashed once, then certain ones will have turned on
to indicate which purge level the machine is set at.
There are 5 levels of purge available:
•
1. Maximum Purge is when All 5 lights are
ON. Use for extreme water conditions. Note:
This setting may extend the Harvest cycle
and reduce capacity.
•
2. Heavy Purge is when these 4 lights are
ON: Freeze, Harvest, Clean, Off. Use for
severe water conditions.
•
3. Standard Purge (factory setting) is when
these 3 lights are ON: Harvest, Clean, Off.
Use for moderate to severe water
conditions.
•
4. Moderate Purge is when these 2 lights
are ON: Clean, Off. This is for typical water
conditions.
•
5. Minimum Purge is when this light is ON:
Off. For excellent water conditions.
Adjust by pushing and releasing the Freeze
button. Pushing and releasing the Freeze button
increases the purge one level up to the maximum,
then it goes to the minimum.
4. The machine will automatically restart after 60
seconds of no switch inputs, or restart the machine
by pushing in and holding the Off button for more
than 3 seconds, then releasing it. The unit will then
be Off. From there the machine may be placed in
a freeze cycle by pushing and releasing the
Freeze button.
CME256, 506, 656, 806: AutoIQ™ Cubers
July 2002
Page 13
Water
Regulating
Valve
Adjustment
Screw
Adjusting Water Cooled
Discharge Pressure