Manitowoc J-1300, Руководство по обслуживанию

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Section 7 Refrigeration System
7-25
J Model Dual Expansion Valve
Refrigeration System Operational Analysis Table
This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table and
external items/problems which can cause good refrigeration components to appear defective.
Operational Analysis
(listed below)
1 2 3 4
Ice Production Published 24 hour ice production: ______________
Calculated (actual) ice production: ______________
NOTE: The ice machine is operating properly if the ice production and the ice formation pattern is normal.
Installation and Water
System
Installation and/or water-related problems can simulate a refrigerant component malfunction. Refer to
“Installation/Visual Inspection Checklist” and “Water System Checklist” and correct all problems before
proceeding.
Ice Formation Pattern
Left Side:
_________________
_________________________
Right Side:
________________
_________________________
NOTE: It is normal for the “dimples”
in the ice cubes on the top of the
evaporator to be more pronounced
than the dimples” in the ice cubes
on the bottom of the evaporator.
1. Ice formation is
extremely thin on top of
evaporator
-or-
2. No ice formation on
entire evaporator
❏
1. Ice formation is
extremely thin on top of
evaporator
-or-
2. No ice formation on
entire evaporator
❏
1. Ice formation is normal
-or-
2. Ice formation is
extremely thin on bottom of
evaporator
-or-
3. No ice formation on
entire evaporator
❏
1. Ice formation is normal
-or-
2. No ice formation on entire
evaporator
❏
Safety Limits
Refer to “Safety Limits” to
eliminate problems and/or
components not listed
on this table.
Stops on safety limit:
1
❏
Stops on safety limit:
1 or 4
❏
Stops on safety limit:
1 or 2 or 3
❏
Stops on safety limit:
1 or 4
❏
Wait five minutes into the
freeze cycle.
Compare compressor
discharge line temp. to
hot gas valve inlet temps.
Compressor ______ °
Left Hot Gas Inlet ______ °
Right Hot Gas Inlet ______ °
Inlet of one hot gas valve is
HOT
-and-
approaches the
temperature of a
HOT compressor
discharge line
❏
Inlet of both hot gas valves
are COOL enough to hold
hand on
-and-
compressor
discharge line is
HOT
❏
Inlet of both hot gas valves
are COOL enough to hold
hand on
-and-
compressor discharge line
is COOL enough to hold
hand on
❏
Inlet of both hot gas valves
are COOL enough to hold
hand on
-and-
compressor
discharge line is
HOT
❏
Freeze cycle
DISCHARGE pressure
________ ________ ________
1 minute Middle End
into cycle
If discharge pressure is High or Low , refer to a freeze cycle high (or low) discharge pressure checklist to
eliminate problems/components not listed on this table before proceeding.
Freeze cycle
SUCTION pressure
If suction pressure is High or Low , refer to a freeze cycle high (or low) suction pressure checklist to
eliminate problems/components not listed on this table before proceeding.
________ ________ ________
1 minute Middle End
into cycle
Suction pressure is:
HIGH
❏
Suction pressure is:
LOW
❏
Suction pressure is:
HIGH
❏
Suction pressure is:
HIGH
❏
Miscellaneous
Enter items in proper boxes.
❏ ❏ ❏ ❏
Final Analysis
Total the number of boxes
checked in each column.
Column 1 Total: __
Hot Gas Valve
Leaking
Column 2 Total: __
Low on Charge
-OR- TXV Starving
Column 3 Total: __
TXV Flooding
Column 4 Total: __
Compressor
MANITOWOC ICE, INC.
2110 South 26th Street P.O. Box 1720 Manitowoc, WI 54221-1720
Phone: (414) 682-0161 Service Fax: (414) 683-7585
Web Site: http://www.manitowoc.com